US20010000927A1 - Semiconductor and flip chip packages and method having a back-side connection - Google Patents
Semiconductor and flip chip packages and method having a back-side connection Download PDFInfo
- Publication number
- US20010000927A1 US20010000927A1 US09/739,071 US73907100A US2001000927A1 US 20010000927 A1 US20010000927 A1 US 20010000927A1 US 73907100 A US73907100 A US 73907100A US 2001000927 A1 US2001000927 A1 US 2001000927A1
- Authority
- US
- United States
- Prior art keywords
- die
- substrate
- back side
- chip package
- conductive substance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
- H01L23/3107—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed
- H01L23/3121—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed a substrate forming part of the encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/56—Encapsulations, e.g. encapsulation layers, coatings
- H01L21/563—Encapsulation of active face of flip-chip device, e.g. underfilling or underencapsulation of flip-chip, encapsulation preform on chip or mounting substrate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/73—Means for bonding being of different types provided for in two or more of groups H01L24/10, H01L24/18, H01L24/26, H01L24/34, H01L24/42, H01L24/50, H01L24/63, H01L24/71
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
- H01L2224/732—Location after the connecting process
- H01L2224/73201—Location after the connecting process on the same surface
- H01L2224/73203—Bump and layer connectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01029—Copper [Cu]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01078—Platinum [Pt]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01079—Gold [Au]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/14—Integrated circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/151—Die mounting substrate
- H01L2924/153—Connection portion
- H01L2924/1531—Connection portion the connection portion being formed only on the surface of the substrate opposite to the die mounting surface
- H01L2924/15311—Connection portion the connection portion being formed only on the surface of the substrate opposite to the die mounting surface being a ball array, e.g. BGA
Definitions
- the present invention relates generally to electronic and electronic systems and methods, and more particularly, to a method and apparatus for manufacturing and electrically connecting semiconductor chip packages to printed circuit boards using a back side connection.
- a chip-scale circuit is one that has an area equal to or less than 1.2 times the area of the die used to make the device.
- flip-chip bonding is a technique of using solder balls to solder the chips face down on a substrate.
- An example of flip chip bump bonding is shown in U.S. Pat. No. 4,912,545.
- a conductive epoxy has also been used to making a front-side connection from multiple die to a substrate. An example of this can be seen in U.S. Pat. No. 5,657,206 where the connection is made from the die front Oside to the substrate.
- the present invention provides a semiconductor chip package with a back side connection and method of manufacture that substantially eliminates or reduces disadvantages and problems associated with previously developed semiconductor chip packages and methods of manufacture.
- the present invention provides a semiconductor chip package having a back side connection.
- the semiconductor chip package includes a die with bond pads to connect to a substrate.
- the substrate includes terminals opposite the side facing the die that electrically connect to contact pads on the opposite side of the substrate by way of vias that electrically connect the contact pads to the terminals.
- the vias can be buried in the substrate.
- the back side of the die is electrically connected to a bond pad (and thereby to the terminal through the via) using a conductive substance that can cascade from the back side of the die to the bond pad.
- Solder balls can be attached to the terminals to provide solder connections to a printed circuit board.
- An insulating coating can be applied to the die between the conductive substance and the edge of the die along which the conductive substance cascades.
- the substrate is eliminated and the conductive substance will make a connection from the die back side directly to the printed circuit board at an etch or pad.
- the present invention provides a technical advantage by reducing the area required for discreet devises and integrated circuits formed from standard die having back side connections.
- the present invention eliminates the requirement for lead wires extending from the die in a flip chip package to the printed circuit board, thereby reducing the space required to connect the flip chip device to the remainder of the circuit.
- the present invention provides another technical advantage by allowing the use of standard back side connection die.
- the present invention can use the existing bond pads and industry standard die without modification of the die.
- FIG. 1 shows a side view of an embodiment of the present invention
- FIG. 2 shows another side view of a particular embodiment of the present invention with exemplary dimensions
- FIG. 3 shows a bottom view of the FIG. 2 embodiment of the present invention with exemplary dimensions
- FIG. 4 shows several embodiments of the present invention contained on a larger substrate with the sacrificial layer prior to sawing
- FIG. 5 is a flow diagram illustrating one embodiment of a manufacturing process to manufacture semiconductor chip packages according to the present invention.
- the semiconductor chip package of the present invention uses a conductive substance or material to electrically connect the backside of an upside down die to either the solder ball connections of a flip-chip package or directly to a printed circuit board.
- the present invention can combine flip-chip bump technology with a conductive substance/material that electrically connects the die backside to the solder balls in order to utilize industry standard die with back-side connection points to reduce the size of the components while continuing to use standard “off-the-shelf” die.
- the term “die” will collectively refer to “die”, “chips”, “devices”, “packages” and/or “dice” or any other term used to refer to the die or device, whether in wafer form or otherwise.
- FIG. 1 shows an embodiment of the semiconductor chip package 10 of the present invention that is a flip-chip package 10 including an upside down die 12 having an active back side.
- the upside down die 12 is inverted so that the die 12 front side faces the internal side 17 of substrate 18 .
- the upside down die 12 includes any industry standard die with an active back side that can be the die for any discreet component or integrated circuit.
- the upside down die 12 typically includes a metallization layer 26 on the back side 28 of the upside down die 12 .
- the die 12 can be provided by a manufacturer with the flip chip bump technology (bond pads 16 ) included, or the bond pads 16 can be subsequently added to the die 12 . It should be understood that any discrete component or integrated circuit, including but not limited to diodes, transistors, and microprocessors, can be contained within the flip-chip package 10 of the present invention.
- the upside down die 12 bonds to contact pads 21 of substrate 18 through the metal bond pads 16 provided with the die 12 .
- the number of metal bond pads 16 will depend on the particular die 12 and application.
- the metal bond pads 16 are typically copper or nickel pads having a gold plating (or other appropriate plating).
- the substrate 18 can be a fiberglass, ceramic, or other appropriate material.
- the substrate 18 can have any height that meets the requirements of the application. However, the substrate 18 should be of an adequate thickness/strength to avoid excessive warping during manufacture.
- a frame support can be used to avoid excessive warping of the substrate.
- a potting material 14 such as Dexter Hysol potting compound, surrounds the upside down die 12 .
- the potting material 14 can contain a variety of materials/substances, such as carbon flakes or other thermally conductive substance, that could enhance heat transfer from the flip chip package 10 during electrical operation.
- the potting material 14 can also be made up of more than one substance, for instance an underfill substance can be used to fill between the upside down die 12 and the substrate 18 , while a different potting material can be used to cover the remainder of the upside down die 12 .
- the substrate 18 includes at least one via 22 for providing electrical connection from the external side 19 to the internal side 17 of the substrate 18 .
- a number of vias 22 can be buried in the substrate 18 that continue through the substrate 18 .
- the via can be any means of connecting the substrate internal side 17 to the substrate external side 19 , including clip-on lead technology.
- the buried vias 22 of FIG. 1 originate at a terminal 23 on the external side 19 of the substrate 18 and terminate at a contact pad 21 on the internal side 17 of the substrate 18 .
- Contact pads 21 mate with and electrically connect to bond pads 16 of the upside down die 12 .
- the terminals 23 can include the plated terminal connected to solder balls 24 as shown in FIG. 1.
- the buried vias 22 can also provide thermal transfer from the devise (or upside down die 12 ) to the substrate 18 during operation of the semiconductor chip package 10 .
- the solder balls 24 can be used to connect the flip-chip package 10 to a printed circuit board that will incorporate the flip-chip package 10 .
- a conductive substance 20 is shown electrically connecting the active back side 28 of the upside down die 12 to one of the bond pads 16 connected to the substrate 18 .
- the conductive substance 20 can be any conductive epoxy (for example, a thermo-electrically conductive epoxy manufactured by Epotech) or conductive plastic such as a nitride filled thermo-plastic.
- the conductive substance 20 may also be a thermally conductive substance to aid in the removal of heat from the device during operation. It should be understood that while the conductive substance 20 must be able to conduct electrically, it need not necessarily require thermal conductivity depending on the thermal transfer requirements of the particular flip-chip device 10 .
- the conductive substance 20 connects the back side 28 of the upside down die 12 at point A, along the right edge of the upside down die 12 , to bond pad 16 at point B at the substrate 18 .
- the conductive substance 20 is shown cascading from the active back side 28 along the die edge 38 to the bond pad 16 .
- the conductive substance 20 makes at least one connection at the back side 28 of the upside down die 12 and connects to at least one bond pad 16 at the substrate 18 .
- the conductive substance 20 can be placed at any point on the die back side 28 and along any die edge 40 to electrically connect the devise 12 to the substrate 18 .
- the conductive substance 20 could be applied to both the right die edge 38 and left die edge 30 in the FIG.
- the conductive substance 20 may need to be applied to all four edges of the upside down die 12 in order to significantly increase the amount of back side 28 connection.
- the conductive substance 20 could be applied multiple times from the back side 28 to the substrate to form multiple conductive substance traces that provide back-side to substrate electrical connections.
- the amount of conductive substance 20 used will be based on the electrical conductivity requirements of the particular flip-chip package 10 .
- This back-side connection of the upside down die 12 to the solder balls 24 via the thermo-electrically conductive substance 20 provides the ability to greatly reduce the size requirements for semiconductor devices while using standard back side connection die without having to modify the die.
- the semiconductor chip package of FIG. 1 can be a chip-on-board device that does not include a substrate.
- the conductive substance 20 would directly connect the die back side 28 to a printed circuit board connection point, such as an etch.
- This chip-on-board embodiment would provide the advantages of using standard active back side die that are connected using the conductive substance to eliminate the need for lead wire connections, but would further reduce the overall size of the semiconductor package by eliminating the substrate.
- the semiconductor chip package of FIG. 1 can include a die-edge coating 40 as an insulator between the conductive substance 20 and the upside down die 12 .
- This die-edge coating 40 would provide an insulating barrier that would prevent or greatly reduce electrical leakage between the upside down die 12 and the conductive substance 20 .
- the die-edge coating 40 simply needs to be a material that is electrically insulating that is compatible with the semiconductor process (an example of a die-edge coating 40 that can be used in conjunction with the present invention include Chip Seal manufactured by Dow Corning).
- the die-edge coating can be applied using a dip process. The individual die 12 can be dipped into a container of the die edge coating at an angle so that the die edge that the conductive substance will cascade down is covered.
- the coating process should leave the die-edge coating on the die (other than the back side) where the conductive would otherwise make contact with the die absent the die edge coating.
- the die-edge coating 40 can be applied to the die as needed for the particular flip chip package 10 application so that the die-edge coating 40 is between the die edge 38 and the conductive substance 20 .
- FIGS. 2 and 3 show a side and bottom view respectively of a specific embodiment of the flip chip package 10 of the present invention that is a flip chip transistor with exemplary dimensions.
- the resistivity of the upside down die 12 in the flip chip transistor of FIG. 2 can be, as an example, approximately 800 volts. It should be understood that the die resistivity can vary for different component flip chip packages 10 of the present invention and for different flip chip applications.
- the upside down die 12 (plus bond pads 16 ) height is 0.0190 inches
- the substrate height is 0.0080 inches
- the flip chip package height exclusive of the solder balls 24 is 0.0320 inches.
- the entire flip chip package height is approximately 0.0510 inches.
- the height of various embodiments of the flip chip package 10 depend on the die height, plus the substrate height, plus the solder ball/terminal height, plus the potting height required in order to cover the conductive substance and die back side. Minimizing each of these heights will minimize the height of the overall flip chip package 10 .
- the flip chip package 10 has width W and a depth D.
- the area of the flip chip package is defined as the width W multiplied by the depth D.
- the flip chip package 10 has a width of 0.1520 inches by a depth of 0.1950 inches, while the upside down die 12 has a width of 0.1440 inches and a depth of 0.178 inches. It should be understood that these dimensions are exemplary and are not limitations on the size of the flip-chip package of the present invention.
- the minimum flip-chip package width and depth dimensions are somewhat dependent on the width and depth dimensions of the upside down die used in the flip chip package.
- the flip-chip package width and depth dimensions can be equal to the die width plus approximately 4 to 10 mils and the die depth plus approximately 4 to 10 mils, respectively.
- the approximately 4 to 10 mils of additional width and depth for the entire flip chip package 10 provide the additional space necessary to allow for the conductive substance 20 that goes from the upside down die back side to the bond pad 16 on the substrate 18 .
- the present invention is not limited to 4 to 10 mils of extra width and depth above and beyond the die width and depth for the flip chip package. Advances in technology could reduce both 1) the die width and depth and 2) the amount of excess width and depth beyond the die width and depth to allow for the conductive substance 20 and the potting material 14 .
- the only limitation on the minimum flip-chip package area is the area of the die 12 plus enough distance outside the die to allow the back side connection to the substrate.
- the flip chip 10 area is defined as the flip chip width times the flip chip depth.
- the overall flip chip transistor area is 0.02964 in 2 (0.1520 in. ⁇ 0.1950 in.) which is equal to 1.16 times the area of the die.
- the flip chip transistor 10 of FIG. 3 meets chip scale requirements. It should be understood that while the present invention provides the technical advantage of allowing flip chips that meet chip scale requirements, the present invention is not just limited to chip scale sized parts.
- the flip chip transistor 10 of FIG. 3 shows three conductors 42 with five solder balls 24 per conductor.
- the vias 22 of FIG. 3 can be either filled or plated with tungsten to increase the thermal cooling capacity of the flip chip transistor 10 .
- the number of solder balls 24 contained on a flip chip package 10 of the FIG. 3 embodiment of present invention is limited to a number such that the center to center spacing between the solder balls 24 is 0.032 inches when using 0.012 inch solder balls 24 . This limitation varies for different diameter solder balls and is a well understood limitation in the industry.
- the flip chip transistor embodiment of FIGS. 2 and 3 can reduce the printed circuit board area required for transistors by 25-30% over existing transistors for every transistor on the printed circuit board.
- the upside down die 12 electrically connects from the die back side 28 via the conductive substance 20 to the bond pad 16 through via 22 to solder ball 24 .
- the solder balls 24 can be connected to a printed circuit board to integrate the flip chip package 10 into the remainder of a circuit.
- the use of the conductive substance 20 enables a back side 28 connection from the back side of a standard die to the bond pad 16 , and thus, through the remainder of the flip chip package 10 to the printed circuit board.
- FIG. 4 is a flow diagram illustrating one embodiment of the manufacturing process of the present invention that can be illustrated with reference to FIGS. 4 and 5.
- the wafer 52 can be a standard wafer containing multiple die and bond pads. This standard wafer with the back side conductive die and bump bond pads can be provided by a manufacturer of the wafer or, alternatively, the bond pads can be added using standard flip chip bumping technologies. “Wafer bumping” is a well-known process in the industry.
- the die will have a metallization layer 26 on the die back side.
- the wafer 52 is made of silicon, but alternative materials, such as gallium arsenide, can also be used.
- the semiconductor chip package processing 68 begins by applying an electrically insulating die edge coating to any edges of the individual die that will be used to create the back side connection 64 .
- Multiple die can now be attached to a substrate.
- the substrate can be provided by a manufacturer and can include contact pads on the back side of the substrate and buried vias connected to solder plated contact pads. The contact pads connect by way of the buried vias to terminals on the opposite side of the substrate that connect to solder balls.
- additional solder can be screen printed onto the solder pads on the substrate 70 .
- the die are placed on the substrate in an inverted manner so that the bond pad bumps on the die align with the contact pads on the substrate 72 .
- This placement of the upside down die on the substrate is an automated process using standard semiconductor manufacturing equipment.
- the solder is then re-flowed on the contact pads to connect the contact pads to the bond pad bumps 74 .
- the back side connection from the back side of the inverted die to a bond pad at the substrate is then formed using the conductive substance, such as an electrically conductive epoxy 76 .
- the space formed between the front side of the die and the substrate is filled with an underfill 78 which is cured 80 .
- the purpose of the underfill is to provide both thermal and physical stress relief for the flip chip package.
- All of the individual die on the substrate are then covered with a potting material which can be accomplished by damming the perimeter of the substrate 82 , applying the potting material within the dam to cover the entire exposed surface of each individual die 84 , and curing the potting material 86 .
- solder balls are then positioned on the back side of the substrate 88 and re-flowed 90 to connect the solder balls to the substrate, thereby providing an electrically conductive path from the bond pads connected to the front side of the substrate to the solder balls connected to the back side of the substrate through the buried vias. This assumes the solder balls did not come as part of the initial substrate.
- each of the individual devices, or some subset thereof, can then electrically tested while on the substrate 92 .
- the substrate is sawed using standard techniques and equipment to separate the individual flip chip devices 94 .
- the substrate is eliminated and the manufacturing steps include applying the electrically insulating coating 64 and forming a connection from the active back side of the die 76 , but in this embodiment the connection would be directly to the printed circuit board instead of to a substrate. If necessary, a potting material and/or underfill can then cover the semiconductor package on the printed circuit board.
- FIG. 5 shows a top view of several flip chip packages 10 according to the present invention contained on a larger substrate 18 that aids in illustrating the manufacturing process of the present invention.
- eight upside down die 12 are installed on the substrate 18 with the metallization layer 26 of each die 12 facing the top. While the substrate in FIG. 5 is shown with eight die incorporated onto the substrate, it should be understood that the substrate can be built to incorporate any number of die.
- FIG. 5 further shows potting ring 44 applied as a perimeter surrounding the upside down die 12 to allow potting material 14 (shown partially) to be applied in order to cover the back side of the multiple die 12 after the back side connection has been established using a conductive substance.
- the sacrificial portion 42 can be removed and the individual devices separated using standard industry sawing equipment along the saw index lines 46 shown.
Abstract
A semiconductor chip package having a back side connection and method of manufacture. The semiconductor chip package can combine industry standard die having conductive back sides with flip chip bump bonding to provide discrete and integrated devices that require less space on a printed circuit board. The chip packages can include a die connected by front side bond pads to a substrate. The substrate includes terminals opposite the side facing the die that electrically connect to contact pads on the opposite side of the substrate by way of vias. In one embodiment, the vias are buried in the substrate. The substrate contact pads connect to bond pads on the front side of the die. The back side of the die is electrically connected to a bond pad (and thereby to the terminal through the via) using a conductive substance that can cascade from the back side of the die to the bond pad. Solder balls can be attached to the terminals to provide solder connections to a printed circuit board. An insulating coating can be applied to the die between the conductive substance and the edge of the die along which the conductive substance cascades. In an alternative embodiment, the substrate is eliminated and the conductive substance directly connects the die back side to a printed circuit board.
Description
- 1. The present invention relates generally to electronic and electronic systems and methods, and more particularly, to a method and apparatus for manufacturing and electrically connecting semiconductor chip packages to printed circuit boards using a back side connection.
- 2. The semiconductor industry has continued to provide products with increased speed and memory while at the same time reducing the overall space requirements of the integrated circuits and electronics associated with these improved products. However, pressure still exists within the industry to reduce the size of circuits and space requirements of the electrical components on the printed circuit boards so that the overall size of the electronic device (such as a cellular telephone) is minimized. The industry has developed a “chip-scale” standard to define minimum space requirements for semiconductor components. A chip-scale circuit is one that has an area equal to or less than 1.2 times the area of the die used to make the device.
- 3. Semiconductor chip manufacturers have typically focused on reductions in size of memory modules and microprocessors. For example, large scale integrated circuits, such as microprocessors are typically tab-leaded, flip chip bumped or coated onto the printed circuit board. However, the smaller pin count components such as transistors, diodes and FETs are still connected using lead frame technology to the printed circuit board. The reduction in size of these smaller pin count semiconductor chips to chip-scale dimensions or near chip scale dimensions would further decrease the overall size of semiconductor circuit boards.
- 4. Various methods have been used to accomplish reductions in size, including “flip-chip” technologies. In a flip chip devise, the flip chip bonding is a technique of using solder balls to solder the chips face down on a substrate. An example of flip chip bump bonding is shown in U.S. Pat. No. 4,912,545.
- 5. A conductive epoxy has also been used to making a front-side connection from multiple die to a substrate. An example of this can be seen in U.S. Pat. No. 5,657,206 where the connection is made from the die front Oside to the substrate.
- 6. The present invention provides a semiconductor chip package with a back side connection and method of manufacture that substantially eliminates or reduces disadvantages and problems associated with previously developed semiconductor chip packages and methods of manufacture.
- 7. More specifically, the present invention provides a semiconductor chip package having a back side connection. The semiconductor chip package includes a die with bond pads to connect to a substrate. The substrate includes terminals opposite the side facing the die that electrically connect to contact pads on the opposite side of the substrate by way of vias that electrically connect the contact pads to the terminals. In one embodiment, the vias can be buried in the substrate. The back side of the die is electrically connected to a bond pad (and thereby to the terminal through the via) using a conductive substance that can cascade from the back side of the die to the bond pad. Solder balls can be attached to the terminals to provide solder connections to a printed circuit board. An insulating coating can be applied to the die between the conductive substance and the edge of the die along which the conductive substance cascades.
- 8. In an alternative embodiment, the substrate is eliminated and the conductive substance will make a connection from the die back side directly to the printed circuit board at an etch or pad.
- 9. The present invention provides a technical advantage by reducing the area required for discreet devises and integrated circuits formed from standard die having back side connections. The present invention eliminates the requirement for lead wires extending from the die in a flip chip package to the printed circuit board, thereby reducing the space required to connect the flip chip device to the remainder of the circuit.
- 10. The present invention provides another technical advantage by allowing the use of standard back side connection die. The present invention can use the existing bond pads and industry standard die without modification of the die.
- 11. For a more complete understanding of the present invention and the advantages thereof, reference is now made to the following description taken in conjunction with the accompanying drawings in which like reference numerals indicate like features and wherein:
- 12.FIG. 1 shows a side view of an embodiment of the present invention;
- 13.FIG. 2 shows another side view of a particular embodiment of the present invention with exemplary dimensions;
- 14. and
- 15.FIG. 3 shows a bottom view of the FIG. 2 embodiment of the present invention with exemplary dimensions;
- 16.FIG. 4 shows several embodiments of the present invention contained on a larger substrate with the sacrificial layer prior to sawing; and
- 17.FIG. 5 is a flow diagram illustrating one embodiment of a manufacturing process to manufacture semiconductor chip packages according to the present invention.
- 18. Preferred embodiments of the present invention are illustrated in the FIGUREs, like numerals being used to refer to like and corresponding parts of the various drawings.
- 19. The semiconductor chip package of the present invention uses a conductive substance or material to electrically connect the backside of an upside down die to either the solder ball connections of a flip-chip package or directly to a printed circuit board. The present invention can combine flip-chip bump technology with a conductive substance/material that electrically connects the die backside to the solder balls in order to utilize industry standard die with back-side connection points to reduce the size of the components while continuing to use standard “off-the-shelf” die. For the purposes of this disclosure, the term “die” will collectively refer to “die”, “chips”, “devices”, “packages” and/or “dice” or any other term used to refer to the die or device, whether in wafer form or otherwise.
- 20.FIG. 1 shows an embodiment of the
semiconductor chip package 10 of the present invention that is a flip-chip package 10 including an upside down die 12 having an active back side. The upside down die 12 is inverted so that the die 12 front side faces theinternal side 17 ofsubstrate 18. The upside down die 12 includes any industry standard die with an active back side that can be the die for any discreet component or integrated circuit. The upside down die 12 typically includes ametallization layer 26 on theback side 28 of the upside down die 12. The die 12 can be provided by a manufacturer with the flip chip bump technology (bond pads 16) included, or thebond pads 16 can be subsequently added to the die 12. It should be understood that any discrete component or integrated circuit, including but not limited to diodes, transistors, and microprocessors, can be contained within the flip-chip package 10 of the present invention. - 21. The upside down die 12 bonds to contact
pads 21 ofsubstrate 18 through themetal bond pads 16 provided with thedie 12. The number ofmetal bond pads 16 will depend on theparticular die 12 and application. Themetal bond pads 16 are typically copper or nickel pads having a gold plating (or other appropriate plating). Thesubstrate 18 can be a fiberglass, ceramic, or other appropriate material. Thesubstrate 18 can have any height that meets the requirements of the application. However, thesubstrate 18 should be of an adequate thickness/strength to avoid excessive warping during manufacture. A frame support can be used to avoid excessive warping of the substrate. A pottingmaterial 14, such as Dexter Hysol potting compound, surrounds the upside down die 12. The pottingmaterial 14 can contain a variety of materials/substances, such as carbon flakes or other thermally conductive substance, that could enhance heat transfer from theflip chip package 10 during electrical operation. The pottingmaterial 14 can also be made up of more than one substance, for instance an underfill substance can be used to fill between the upside down die 12 and thesubstrate 18, while a different potting material can be used to cover the remainder of the upside down die 12. - 22. The
substrate 18 includes at least one via 22 for providing electrical connection from theexternal side 19 to theinternal side 17 of thesubstrate 18. As shown in the embodiment of FIG. 1, a number ofvias 22 can be buried in thesubstrate 18 that continue through thesubstrate 18. It should be understood that the via can be any means of connecting the substrateinternal side 17 to the substrateexternal side 19, including clip-on lead technology. The buried vias 22 of FIG. 1 originate at a terminal 23 on theexternal side 19 of thesubstrate 18 and terminate at acontact pad 21 on theinternal side 17 of thesubstrate 18. Contactpads 21 mate with and electrically connect to bondpads 16 of the upside down die 12. Theterminals 23 can include the plated terminal connected tosolder balls 24 as shown in FIG. 1. In addition to providing an electrical path from thebond pads 16 to the terminals 23 (or solder balls 24), the buried vias 22 can also provide thermal transfer from the devise (or upside down die 12) to thesubstrate 18 during operation of thesemiconductor chip package 10. Thesolder balls 24 can be used to connect the flip-chip package 10 to a printed circuit board that will incorporate the flip-chip package 10. - 23. A
conductive substance 20 is shown electrically connecting the active backside 28 of the upside down die 12 to one of thebond pads 16 connected to thesubstrate 18. Theconductive substance 20 can be any conductive epoxy (for example, a thermo-electrically conductive epoxy manufactured by Epotech) or conductive plastic such as a nitride filled thermo-plastic. Theconductive substance 20 may also be a thermally conductive substance to aid in the removal of heat from the device during operation. It should be understood that while theconductive substance 20 must be able to conduct electrically, it need not necessarily require thermal conductivity depending on the thermal transfer requirements of the particular flip-chip device 10. - 24. As shown in the FIG. 1 embodiment, the
conductive substance 20 connects theback side 28 of the upside down die 12 at point A, along the right edge of the upside down die 12, tobond pad 16 at point B at thesubstrate 18. Theconductive substance 20 is shown cascading from the active backside 28 along thedie edge 38 to thebond pad 16. Theconductive substance 20 makes at least one connection at theback side 28 of the upside down die 12 and connects to at least onebond pad 16 at thesubstrate 18. Theconductive substance 20 can be placed at any point on the die backside 28 and along anydie edge 40 to electrically connect the devise 12 to thesubstrate 18. For example, theconductive substance 20 could be applied to both theright die edge 38 and leftdie edge 30 in the FIG. 1 embodiment to increase the amount ofback side 28 connection. As a further example, in a high-current flip-chip transducer for example, theconductive substance 20 may need to be applied to all four edges of the upside down die 12 in order to significantly increase the amount ofback side 28 connection. Furthermore, theconductive substance 20 could be applied multiple times from theback side 28 to the substrate to form multiple conductive substance traces that provide back-side to substrate electrical connections. The amount ofconductive substance 20 used will be based on the electrical conductivity requirements of the particular flip-chip package 10. This back-side connection of the upside down die 12 to thesolder balls 24 via the thermo-electricallyconductive substance 20 provides the ability to greatly reduce the size requirements for semiconductor devices while using standard back side connection die without having to modify the die. - 25. In an alternative embodiment, the semiconductor chip package of FIG. 1 can be a chip-on-board device that does not include a substrate. In this alternative embodiment, the
conductive substance 20 would directly connect the die backside 28 to a printed circuit board connection point, such as an etch. This chip-on-board embodiment would provide the advantages of using standard active back side die that are connected using the conductive substance to eliminate the need for lead wire connections, but would further reduce the overall size of the semiconductor package by eliminating the substrate. - 26. In another alternative embodiment, the semiconductor chip package of FIG. 1 can include a die-
edge coating 40 as an insulator between theconductive substance 20 and the upside down die 12. This die-edge coating 40 would provide an insulating barrier that would prevent or greatly reduce electrical leakage between the upside down die 12 and theconductive substance 20. The die-edge coating 40 simply needs to be a material that is electrically insulating that is compatible with the semiconductor process (an example of a die-edge coating 40 that can be used in conjunction with the present invention include Chip Seal manufactured by Dow Corning). The die-edge coating can be applied using a dip process. The individual die 12 can be dipped into a container of the die edge coating at an angle so that the die edge that the conductive substance will cascade down is covered. The coating process should leave the die-edge coating on the die (other than the back side) where the conductive would otherwise make contact with the die absent the die edge coating. The die-edge coating 40 can be applied to the die as needed for the particularflip chip package 10 application so that the die-edge coating 40 is between thedie edge 38 and theconductive substance 20. - 27.FIGS. 2 and 3 show a side and bottom view respectively of a specific embodiment of the
flip chip package 10 of the present invention that is a flip chip transistor with exemplary dimensions. The resistivity of the upside down die 12 in the flip chip transistor of FIG. 2 can be, as an example, approximately 800 volts. It should be understood that the die resistivity can vary for different component flip chip packages 10 of the present invention and for different flip chip applications. In FIG. 2, the upside down die 12 (plus bond pads 16) height is 0.0190 inches, the substrate height is 0.0080 inches, and the flip chip package height exclusive of thesolder balls 24 is 0.0320 inches. The entire flip chip package height is approximately 0.0510 inches. The height of various embodiments of theflip chip package 10 depend on the die height, plus the substrate height, plus the solder ball/terminal height, plus the potting height required in order to cover the conductive substance and die back side. Minimizing each of these heights will minimize the height of the overallflip chip package 10. - 28. As shown in FIG. 3, the
flip chip package 10 has width W and a depth D. The area of the flip chip package is defined as the width W multiplied by the depth D. For the particularflip chip transistor 10 of FIG. 2, theflip chip package 10 has a width of 0.1520 inches by a depth of 0.1950 inches, while the upside down die 12 has a width of 0.1440 inches and a depth of 0.178 inches. It should be understood that these dimensions are exemplary and are not limitations on the size of the flip-chip package of the present invention. The minimum flip-chip package width and depth dimensions are somewhat dependent on the width and depth dimensions of the upside down die used in the flip chip package. The flip-chip package width and depth dimensions can be equal to the die width plus approximately 4 to 10 mils and the die depth plus approximately 4 to 10 mils, respectively. The approximately 4 to 10 mils of additional width and depth for the entireflip chip package 10 provide the additional space necessary to allow for theconductive substance 20 that goes from the upside down die back side to thebond pad 16 on thesubstrate 18. It should be understood that the present invention is not limited to 4 to 10 mils of extra width and depth above and beyond the die width and depth for the flip chip package. Advances in technology could reduce both 1) the die width and depth and 2) the amount of excess width and depth beyond the die width and depth to allow for theconductive substance 20 and thepotting material 14. The only limitation on the minimum flip-chip package area is the area of the die 12 plus enough distance outside the die to allow the back side connection to the substrate. - 29. The
flip chip 10 area is defined as the flip chip width times the flip chip depth. The die area is the die width times the die depth. It is a technical advantage of the present invention that the flip-chip package size can meet the “chip-scale” sizing standards in the industry. Current chip-scale standard packaging is defined as 1.2 times the die area. For the embodiment in FIG. 3, the die area is the die width= 0.1440 times the die depth=0.1780 for a die area of 0.025632 in2. The overall flip chip transistor area is 0.02964 in2 (0.1520 in.×0.1950 in.) which is equal to 1.16 times the area of the die. Thus, theflip chip transistor 10 of FIG. 3 meets chip scale requirements. It should be understood that while the present invention provides the technical advantage of allowing flip chips that meet chip scale requirements, the present invention is not just limited to chip scale sized parts. - 30. The
flip chip transistor 10 of FIG. 3 shows threeconductors 42 with fivesolder balls 24 per conductor. Thevias 22 of FIG. 3 can be either filled or plated with tungsten to increase the thermal cooling capacity of theflip chip transistor 10. The number ofsolder balls 24 contained on aflip chip package 10 of the FIG. 3 embodiment of present invention is limited to a number such that the center to center spacing between thesolder balls 24 is 0.032 inches when using 0.012inch solder balls 24. This limitation varies for different diameter solder balls and is a well understood limitation in the industry. The flip chip transistor embodiment of FIGS. 2 and 3 can reduce the printed circuit board area required for transistors by 25-30% over existing transistors for every transistor on the printed circuit board. - 31. In operation, the upside down die 12 electrically connects from the die back
side 28 via theconductive substance 20 to thebond pad 16 through via 22 tosolder ball 24. Thesolder balls 24 can be connected to a printed circuit board to integrate theflip chip package 10 into the remainder of a circuit. The use of theconductive substance 20 enables aback side 28 connection from the back side of a standard die to thebond pad 16, and thus, through the remainder of theflip chip package 10 to the printed circuit board. - 32.FIG. 4 is a flow diagram illustrating one embodiment of the manufacturing process of the present invention that can be illustrated with reference to FIGS. 4 and 5. The
wafer 52 can be a standard wafer containing multiple die and bond pads. This standard wafer with the back side conductive die and bump bond pads can be provided by a manufacturer of the wafer or, alternatively, the bond pads can be added using standard flip chip bumping technologies. “Wafer bumping” is a well-known process in the industry. The die will have ametallization layer 26 on the die back side. Typically, thewafer 52 is made of silicon, but alternative materials, such as gallium arsenide, can also be used. - 33. Referring to FIG. 4, the semiconductor
chip package processing 68 begins by applying an electrically insulating die edge coating to any edges of the individual die that will be used to create theback side connection 64. Multiple die can now be attached to a substrate. Similarly to the wafer, the substrate can be provided by a manufacturer and can include contact pads on the back side of the substrate and buried vias connected to solder plated contact pads. The contact pads connect by way of the buried vias to terminals on the opposite side of the substrate that connect to solder balls. - 34. Optionally, additional solder can be screen printed onto the solder pads on the
substrate 70. The die are placed on the substrate in an inverted manner so that the bond pad bumps on the die align with the contact pads on thesubstrate 72. This placement of the upside down die on the substrate is an automated process using standard semiconductor manufacturing equipment. The solder is then re-flowed on the contact pads to connect the contact pads to the bond pad bumps 74. - 35. The back side connection from the back side of the inverted die to a bond pad at the substrate is then formed using the conductive substance, such as an electrically
conductive epoxy 76. The space formed between the front side of the die and the substrate is filled with anunderfill 78 which is cured 80. The purpose of the underfill is to provide both thermal and physical stress relief for the flip chip package. All of the individual die on the substrate are then covered with a potting material which can be accomplished by damming the perimeter of thesubstrate 82, applying the potting material within the dam to cover the entire exposed surface of eachindividual die 84, and curing thepotting material 86. - 36. Solder balls are then positioned on the back side of the
substrate 88 and re-flowed 90 to connect the solder balls to the substrate, thereby providing an electrically conductive path from the bond pads connected to the front side of the substrate to the solder balls connected to the back side of the substrate through the buried vias. This assumes the solder balls did not come as part of the initial substrate. As an optional step, each of the individual devices, or some subset thereof, can then electrically tested while on thesubstrate 92. Finally, the substrate is sawed using standard techniques and equipment to separate the individualflip chip devices 94. - 37. In an alternative manufacturing process, the substrate is eliminated and the manufacturing steps include applying the electrically insulating
coating 64 and forming a connection from the active back side of the die 76, but in this embodiment the connection would be directly to the printed circuit board instead of to a substrate. If necessary, a potting material and/or underfill can then cover the semiconductor package on the printed circuit board. - 38.FIG. 5 shows a top view of several flip chip packages 10 according to the present invention contained on a
larger substrate 18 that aids in illustrating the manufacturing process of the present invention. As shown in FIG. 5, eight upside down die 12 are installed on thesubstrate 18 with themetallization layer 26 of each die 12 facing the top. While the substrate in FIG. 5 is shown with eight die incorporated onto the substrate, it should be understood that the substrate can be built to incorporate any number of die. FIG. 5 furthershows potting ring 44 applied as a perimeter surrounding the upside down die 12 to allow potting material 14 (shown partially) to be applied in order to cover the back side of the multiple die 12 after the back side connection has been established using a conductive substance. After the manufacturing process is completed, thesacrificial portion 42 can be removed and the individual devices separated using standard industry sawing equipment along thesaw index lines 46 shown. - 39. Although the present invention has been described in detail, it should be understood that various changes, substitutions and alterations can be made hereto without departing from the spirit and scope of the invention as described by the appended claims.
Claims (32)
1. A semiconductor flip chip package having a back side connection, comprising:
a substrate, comprising:
a terminal on an external side;
a contact pad on an internal side; and
a via for electrically connecting the terminal with the contact pad;
a die having an active back side, a front side and an edge, the die positioned so that the die front side faces the substrate external side;
a metallization layer disposed on at least a portion of the back side of the die;
a bond pad disposed between the die and the substrate such that the bond pad mates to the contact pad; and
a conductive substance connecting the die back side to the bond pad to form an electrical connection from the die back side to the substrate terminal.
2. The flip chip package of , wherein the via is contained within the substrate and originate at a terminal and terminates at a contact pad.
claim 1
3. The flip chip package of , further comprising an insulating material disposed on the die between the edge of the die and the conductive substance.
claim 1
4. The flip chip package of , wherein the conductive substance is thermally conductive to provide a heat transfer path for the flip chip package during operation.
claim 1
5. The flip chip package of , further comprising a potting material encapsulating the die, the bond pad, and the conductive substance.
claim 1
6. The flip chip package of , wherein the potting material contains a substance that enhances thermal conductivity to provide a heat transfer path for the flip chip package during operation.
claim 5
7. The flip chip package of , wherein the terminal further comprises a solder ball.
claim 1
8. The flip chip package of , wherein the conductive substance is a thermo-electrically conductive epoxy.
claim 1
9. The flip chip package of , wherein the conductive substance connects the back side of the die to the bond pad by cascading from the die back side down the die edge to the bond pad on the substrate.
claim 1
10. The flip chip package of , wherein the conductive substance connects the back side of the die to the bond pad along multiple die edges.
claim 1
11. The flip chip package of , further comprising a plurality of conductive substance traces, wherein each conductive substance trace connects the back side of the die to a bond pad.
claim 1
12. The flip chip package of wherein the flip chip area is less than or equal to 1.2 times the die area.
claim 1
13. The flip chip package of , wherein the die is a semiconductor chip and the conductive substance electrically connects the semiconductor chip to the terminal on the substrate.
claim 1
14. The flip chip package of wherein the substrate further comprises a plurality of terminals, a plurality of contact pads, and a plurality of vias where each via originates at a terminal and terminates at a contact pad; and a plurality of bond pads where each bond pad connects to one of the contact pads.
claim 1
15. The flip chip package of , wherein the via is tungsten filled or plated.
claim 1
16. A method for manufacturing a semiconductor flip chip package having a back side connection using a die having a active back side, a front side, at least one edge, and at least one bond pad on the front side of the die and a substrate having at least one via, at least one terminal, an at least one contact, each via terminating at a terminal at a first end and at a contact pad at a second end, comprising:
placing the die on the substrate such that the front side of the die faces the substrate;
aligning the at least one bond pad with the contact pad;
placing a conductive substance in contact with both the back side of the die and the at least one bond pad to electrically connect the back side of the die to the terminal on the substrate.
17. The method of , wherein the via is buried within the substrate.
claim 16
18. The method of , further comprising:
claim 16
applying an electrically insulating die edge coating to any portion of the die edge that would otherwise come in contact with the conductive substance prior to placing the conductive substance on the die.
19. The method of , further comprising:
claim 16
attaching solder balls to the terminals on the back side of the substrate, thereby providing an electrically conductive path from the bond pads to the solder balls through the vias.
20. The method of , further comprising:
claim 16
prior to placing the conductive substance:
applying solder to the contact pads of the substrate; and
re-flowing the solder on the contact pads to connect the contact pads to the bond pads;
after placing the conductive substance:
filling the space formed between the front side of the die and the substrate with an underfill;
curing the underfill; and
encapsulating the die on the substrate with a potting material.
21. The method of , wherein encapsulating further comprises:
claim 20
damming the perimeter of the substrate;
applying the potting material within the dam to cover the entire exposed surface of the die; and
curing the potting material.
22. The method of , further comprising:
claim 16
connecting a plurality of die to the substrate;
electrically testing each die while on the substrate; and
sawing the substrate to separate the individual flip chip packages.
23. A semiconductor chip package having a back side connection directly connected to a printed circuit board, comprising:
a die having an active back side, a front side and an edge, the die positioned so that the die front side faces the printed circuit board;
a metallization layer disposed on at least a portion of the back side of the die; and
a conductive substance connecting the die back side to an electrical connection point on the printed circuit board.
24. The chip package of , wherein the electrical connection point on the printed circuit board is an etch.
claim 23
25. The chip package of , further comprising an insulating material disposed on the die between the edge of the die and the conductive substance.
claim 23
26. The chip package of , wherein the conductive substance is thermally conductive to provide a heat transfer path for the flip chip package during operation.
claim 23
27. The chip package of , wherein the conductive substance is a thermo-electrically conductive epoxy.
claim 23
28. The chip package of , wherein the conductive substance connects the back side of the die to the printed circuit board by cascading from the die back side down the die edge to the printed circuit board along multiple die edges.
claim 23
29. The chip package of , further comprising a plurality of conductive substance traces, wherein each conductive substance trace connects the back side of the die to the printed circuit board.
claim 23
30. A method for manufacturing a semiconductor chip package having a back side connection using a die having a active back side, a front side, at least one edge, the chip package operable to directly connect to a printed circuit board, comprising:
placing a conductive substance in contact with the back side of the die and the printed circuit board to electrically connect the back side of the die to the printed circuit board.
31. The method of , further comprising:
claim 30
applying an electrically insulating die edge coating to any portion of the die edge that would otherwise come in contact with the conductive substance prior to placing the conductive substance on the die.
32. The method of , further comprising:
claim 30
filling a space formed between the front side of the die and the printed circuit board;
curing the underfill; and
encapsulating the die on the printed circuit board.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/739,071 US6406938B2 (en) | 1998-04-23 | 2000-12-18 | Semiconductor and flip chip packages and method having a back-side connection |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/065,677 US6191487B1 (en) | 1998-04-23 | 1998-04-23 | Semiconductor and flip chip packages and method having a back-side connection |
US09/739,071 US6406938B2 (en) | 1998-04-23 | 2000-12-18 | Semiconductor and flip chip packages and method having a back-side connection |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/065,677 Division US6191487B1 (en) | 1998-04-23 | 1998-04-23 | Semiconductor and flip chip packages and method having a back-side connection |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010000927A1 true US20010000927A1 (en) | 2001-05-10 |
US6406938B2 US6406938B2 (en) | 2002-06-18 |
Family
ID=22064377
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/065,677 Expired - Fee Related US6191487B1 (en) | 1998-04-23 | 1998-04-23 | Semiconductor and flip chip packages and method having a back-side connection |
US09/739,071 Expired - Fee Related US6406938B2 (en) | 1998-04-23 | 2000-12-18 | Semiconductor and flip chip packages and method having a back-side connection |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/065,677 Expired - Fee Related US6191487B1 (en) | 1998-04-23 | 1998-04-23 | Semiconductor and flip chip packages and method having a back-side connection |
Country Status (1)
Country | Link |
---|---|
US (2) | US6191487B1 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030038356A1 (en) * | 2001-08-24 | 2003-02-27 | Derderian James M | Semiconductor devices including stacking spacers thereon, assemblies including the semiconductor devices, and methods |
US20040184226A1 (en) * | 2003-03-18 | 2004-09-23 | Hall Frank L. | Bare die semiconductor dice underfilled and encapsulated with a single dielectric material and method for manufacturing the same |
US20050162745A1 (en) * | 2001-08-29 | 2005-07-28 | Donnelly Corporation | Vehicle rearview mirror system with compass sensor and method of making same |
US20060017172A1 (en) * | 2004-07-20 | 2006-01-26 | Burton Edward A | Die and die-package interface metallization and bump design and arrangement |
US20060131732A1 (en) * | 2004-12-16 | 2006-06-22 | Nah Chih K | Discrete electronic component arrangement including anchoring, thermally conductive pad |
US20060141666A1 (en) * | 2004-12-29 | 2006-06-29 | Infineon Technologies Ag | Method for producing a module including an integrated circuit on a substrate and an integrated module manufactured thereby |
US20080246147A1 (en) * | 2007-04-09 | 2008-10-09 | Chao-Yuan Su | Novel substrate design for semiconductor device |
US20080284015A1 (en) * | 2007-04-24 | 2008-11-20 | United Test And Assembly Center, Ltd. | Bump on via-packaging and methodologies |
US20100032828A1 (en) * | 2006-09-14 | 2010-02-11 | Seng Guan Chow | Semiconductor assembly with component attached on die back side |
US20110092066A1 (en) * | 1997-05-27 | 2011-04-21 | Mackay John | Bumping Electronic Components Using Transfer Substrates |
US20110147912A1 (en) * | 2009-12-23 | 2011-06-23 | Prasanna Karpur | Methods and apparatuses to stiffen integrated circuit package |
US11355357B2 (en) * | 2017-07-24 | 2022-06-07 | Denso Corporation | Semiconductor device and method for producing the semiconductor device |
Families Citing this family (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3446825B2 (en) * | 1999-04-06 | 2003-09-16 | 沖電気工業株式会社 | Semiconductor device and manufacturing method thereof |
US6949822B2 (en) * | 2000-03-17 | 2005-09-27 | International Rectifier Corporation | Semiconductor multichip module package with improved thermal performance; reduced size and improved moisture resistance |
US6774315B1 (en) * | 2000-05-24 | 2004-08-10 | International Business Machines Corporation | Floating interposer |
US6468892B1 (en) * | 2000-07-14 | 2002-10-22 | National Semiconductor Corporation | Front side coating for bump devices |
US6379982B1 (en) * | 2000-08-17 | 2002-04-30 | Micron Technology, Inc. | Wafer on wafer packaging and method of fabrication for full-wafer burn-in and testing |
US6788552B1 (en) * | 2000-08-30 | 2004-09-07 | Micron Technology, Inc. | Method and apparatus for reducing substrate bias voltage drop |
KR100716870B1 (en) * | 2001-04-20 | 2007-05-09 | 앰코 테크놀로지 코리아 주식회사 | Semiconductor package and its manufacturing method |
US7115986B2 (en) * | 2001-05-02 | 2006-10-03 | Micron Technology, Inc. | Flexible ball grid array chip scale packages |
SG104293A1 (en) * | 2002-01-09 | 2004-06-21 | Micron Technology Inc | Elimination of rdl using tape base flip chip on flex for die stacking |
SG121707A1 (en) * | 2002-03-04 | 2006-05-26 | Micron Technology Inc | Method and apparatus for flip-chip packaging providing testing capability |
SG115456A1 (en) * | 2002-03-04 | 2005-10-28 | Micron Technology Inc | Semiconductor die packages with recessed interconnecting structures and methods for assembling the same |
US6975035B2 (en) | 2002-03-04 | 2005-12-13 | Micron Technology, Inc. | Method and apparatus for dielectric filling of flip chip on interposer assembly |
SG111935A1 (en) | 2002-03-04 | 2005-06-29 | Micron Technology Inc | Interposer configured to reduce the profiles of semiconductor device assemblies and packages including the same and methods |
SG115459A1 (en) * | 2002-03-04 | 2005-10-28 | Micron Technology Inc | Flip chip packaging using recessed interposer terminals |
SG115455A1 (en) * | 2002-03-04 | 2005-10-28 | Micron Technology Inc | Methods for assembly and packaging of flip chip configured dice with interposer |
US20040036170A1 (en) * | 2002-08-20 | 2004-02-26 | Lee Teck Kheng | Double bumping of flexible substrate for first and second level interconnects |
US20040252491A1 (en) * | 2003-06-10 | 2004-12-16 | Armament Systems And Procedures, Inc. | Printed circuit board lamp |
CN100416806C (en) * | 2003-08-20 | 2008-09-03 | 日月光半导体制造股份有限公司 | Packaging structure with projected zone carrying crystals, crystals carried substrate and crystals carried assembly |
US8084866B2 (en) | 2003-12-10 | 2011-12-27 | Micron Technology, Inc. | Microelectronic devices and methods for filling vias in microelectronic devices |
US7091124B2 (en) * | 2003-11-13 | 2006-08-15 | Micron Technology, Inc. | Methods for forming vias in microelectronic devices, and methods for packaging microelectronic devices |
KR20050065038A (en) * | 2003-12-24 | 2005-06-29 | 삼성전기주식회사 | Printed circuit board and package having oblique via |
US20050247894A1 (en) | 2004-05-05 | 2005-11-10 | Watkins Charles M | Systems and methods for forming apertures in microfeature workpieces |
US7232754B2 (en) | 2004-06-29 | 2007-06-19 | Micron Technology, Inc. | Microelectronic devices and methods for forming interconnects in microelectronic devices |
US7425499B2 (en) * | 2004-08-24 | 2008-09-16 | Micron Technology, Inc. | Methods for forming interconnects in vias and microelectronic workpieces including such interconnects |
SG120200A1 (en) * | 2004-08-27 | 2006-03-28 | Micron Technology Inc | Slanted vias for electrical circuits on circuit boards and other substrates |
US7300857B2 (en) | 2004-09-02 | 2007-11-27 | Micron Technology, Inc. | Through-wafer interconnects for photoimager and memory wafers |
US7271482B2 (en) | 2004-12-30 | 2007-09-18 | Micron Technology, Inc. | Methods for forming interconnects in microelectronic workpieces and microelectronic workpieces formed using such methods |
US7795134B2 (en) | 2005-06-28 | 2010-09-14 | Micron Technology, Inc. | Conductive interconnect structures and formation methods using supercritical fluids |
US7622377B2 (en) * | 2005-09-01 | 2009-11-24 | Micron Technology, Inc. | Microfeature workpiece substrates having through-substrate vias, and associated methods of formation |
US7863187B2 (en) | 2005-09-01 | 2011-01-04 | Micron Technology, Inc. | Microfeature workpieces and methods for forming interconnects in microfeature workpieces |
US7262134B2 (en) | 2005-09-01 | 2007-08-28 | Micron Technology, Inc. | Microfeature workpieces and methods for forming interconnects in microfeature workpieces |
JP4564434B2 (en) * | 2005-09-30 | 2010-10-20 | Okiセミコンダクタ株式会社 | Semiconductor device and manufacturing method of semiconductor device |
US20070152310A1 (en) * | 2005-12-29 | 2007-07-05 | Tessera, Inc. | Electrical ground method for ball stack package |
US7749899B2 (en) | 2006-06-01 | 2010-07-06 | Micron Technology, Inc. | Microelectronic workpieces and methods and systems for forming interconnects in microelectronic workpieces |
US7629249B2 (en) * | 2006-08-28 | 2009-12-08 | Micron Technology, Inc. | Microfeature workpieces having conductive interconnect structures formed by chemically reactive processes, and associated systems and methods |
US7902643B2 (en) | 2006-08-31 | 2011-03-08 | Micron Technology, Inc. | Microfeature workpieces having interconnects and conductive backplanes, and associated systems and methods |
SG150410A1 (en) | 2007-08-31 | 2009-03-30 | Micron Technology Inc | Partitioned through-layer via and associated systems and methods |
US7830022B2 (en) * | 2007-10-22 | 2010-11-09 | Infineon Technologies Ag | Semiconductor package |
US7884015B2 (en) | 2007-12-06 | 2011-02-08 | Micron Technology, Inc. | Methods for forming interconnects in microelectronic workpieces and microelectronic workpieces formed using such methods |
US7982316B1 (en) * | 2008-02-04 | 2011-07-19 | Amkor Technology, Inc. | Semiconductor package having a land to absorb thermal and mechanical stress and fabricating method thereof |
US8222078B2 (en) * | 2009-07-22 | 2012-07-17 | Alpha And Omega Semiconductor Incorporated | Chip scale surface mounted semiconductor device package and process of manufacture |
KR101069499B1 (en) * | 2009-10-05 | 2011-09-30 | 앰코 테크놀로지 코리아 주식회사 | Semiconductor Device And Fabricating Method Thereof |
US8466563B2 (en) | 2010-05-19 | 2013-06-18 | The Johns Hopkins University | Apparatus and methods for 3-D stacking of thinned die |
US8709877B2 (en) | 2012-06-13 | 2014-04-29 | Stats Chippac Ltd. | Integrated circuit packaging system with an encapsulation and method of manufacture thereof |
US9634053B2 (en) * | 2014-12-09 | 2017-04-25 | Taiwan Semiconductor Manufacturing Co., Ltd. | Image sensor chip sidewall interconnection |
CN110600596A (en) * | 2018-06-13 | 2019-12-20 | 相丰科技股份有限公司 | Vertical light emitting diode structure and manufacturing method thereof |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4912545A (en) | 1987-09-16 | 1990-03-27 | Irvine Sensors Corporation | Bonding of aligned conductive bumps on adjacent surfaces |
JP3105089B2 (en) * | 1992-09-11 | 2000-10-30 | 株式会社東芝 | Semiconductor device |
US5406701A (en) | 1992-10-02 | 1995-04-18 | Irvine Sensors Corporation | Fabrication of dense parallel solder bump connections |
JP3354937B2 (en) | 1993-04-23 | 2002-12-09 | イルビン センサーズ コーポレーション | An electronic module including a stack of IC chips each interacting with an IC chip fixed to the surface of the stack. |
US5657206A (en) | 1994-06-23 | 1997-08-12 | Cubic Memory, Inc. | Conductive epoxy flip-chip package and method |
US5569880A (en) * | 1994-12-02 | 1996-10-29 | Avx Corporation | Surface mountable electronic component and method of making same |
DE69621983T2 (en) * | 1995-04-07 | 2002-11-21 | Shinko Electric Ind Co | Structure and method of assembling a semiconductor chip |
JPH09260552A (en) * | 1996-03-22 | 1997-10-03 | Nec Corp | Mounting structure of semiconductor chip |
US6144101A (en) * | 1996-12-03 | 2000-11-07 | Micron Technology, Inc. | Flip chip down-bond: method and apparatus |
US5982018A (en) * | 1997-05-23 | 1999-11-09 | Micron Technology, Inc. | Thin film capacitor coupons for memory modules and multi-chip modules |
US5888884A (en) * | 1998-01-02 | 1999-03-30 | General Electric Company | Electronic device pad relocation, precision placement, and packaging in arrays |
-
1998
- 1998-04-23 US US09/065,677 patent/US6191487B1/en not_active Expired - Fee Related
-
2000
- 2000-12-18 US US09/739,071 patent/US6406938B2/en not_active Expired - Fee Related
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110092066A1 (en) * | 1997-05-27 | 2011-04-21 | Mackay John | Bumping Electronic Components Using Transfer Substrates |
US20030038356A1 (en) * | 2001-08-24 | 2003-02-27 | Derderian James M | Semiconductor devices including stacking spacers thereon, assemblies including the semiconductor devices, and methods |
US8101459B2 (en) | 2001-08-24 | 2012-01-24 | Micron Technology, Inc. | Methods for assembling semiconductor devices in stacked arrangements by positioning spacers therebetween |
US7246910B2 (en) * | 2001-08-29 | 2007-07-24 | Donnelly Corporation | Vehicle rearview mirror system with compass sensor and method of making same |
US20050162745A1 (en) * | 2001-08-29 | 2005-07-28 | Donnelly Corporation | Vehicle rearview mirror system with compass sensor and method of making same |
US6987058B2 (en) | 2003-03-18 | 2006-01-17 | Micron Technology, Inc. | Methods for underfilling and encapsulating semiconductor device assemblies with a single dielectric material |
US20050253241A1 (en) * | 2003-03-18 | 2005-11-17 | Hall Frank L | Semiconductor device assemblies including an encapsulant located over intermediate conductive elements and filling a space between a semiconductor die and a carrier of the assembly |
US20040184226A1 (en) * | 2003-03-18 | 2004-09-23 | Hall Frank L. | Bare die semiconductor dice underfilled and encapsulated with a single dielectric material and method for manufacturing the same |
US20050263906A1 (en) * | 2003-03-18 | 2005-12-01 | Hall Frank L | Electronic system including a semiconductor device with at least one semiconductor die, a carrier, and an encapsulant that fills a space between the die and the carrier and covers intermediate conductive elements that connect the die and the carrier |
US20060017172A1 (en) * | 2004-07-20 | 2006-01-26 | Burton Edward A | Die and die-package interface metallization and bump design and arrangement |
US7332817B2 (en) * | 2004-07-20 | 2008-02-19 | Intel Corporation | Die and die-package interface metallization and bump design and arrangement |
US20060131732A1 (en) * | 2004-12-16 | 2006-06-22 | Nah Chih K | Discrete electronic component arrangement including anchoring, thermally conductive pad |
US7148554B2 (en) * | 2004-12-16 | 2006-12-12 | Delphi Technologies, Inc. | Discrete electronic component arrangement including anchoring, thermally conductive pad |
US20060141666A1 (en) * | 2004-12-29 | 2006-06-29 | Infineon Technologies Ag | Method for producing a module including an integrated circuit on a substrate and an integrated module manufactured thereby |
US7952211B2 (en) * | 2006-09-14 | 2011-05-31 | Stats Chippac, Inc. | Semiconductor assembly with component pads attached on die back side |
US20100032828A1 (en) * | 2006-09-14 | 2010-02-11 | Seng Guan Chow | Semiconductor assembly with component attached on die back side |
US20080246147A1 (en) * | 2007-04-09 | 2008-10-09 | Chao-Yuan Su | Novel substrate design for semiconductor device |
US20080284015A1 (en) * | 2007-04-24 | 2008-11-20 | United Test And Assembly Center, Ltd. | Bump on via-packaging and methodologies |
US8030768B2 (en) * | 2007-04-24 | 2011-10-04 | United Test And Assembly Center Ltd. | Semiconductor package with under bump metallization aligned with open vias |
US20110147912A1 (en) * | 2009-12-23 | 2011-06-23 | Prasanna Karpur | Methods and apparatuses to stiffen integrated circuit package |
US8143110B2 (en) * | 2009-12-23 | 2012-03-27 | Intel Corporation | Methods and apparatuses to stiffen integrated circuit package |
US8502400B2 (en) | 2009-12-23 | 2013-08-06 | Intel Corporation | Methods and apparatuses to stiffen integrated circuit package |
US11355357B2 (en) * | 2017-07-24 | 2022-06-07 | Denso Corporation | Semiconductor device and method for producing the semiconductor device |
Also Published As
Publication number | Publication date |
---|---|
US6406938B2 (en) | 2002-06-18 |
US6191487B1 (en) | 2001-02-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6406938B2 (en) | Semiconductor and flip chip packages and method having a back-side connection | |
US7205178B2 (en) | Land grid array packaged device and method of forming same | |
US8704349B2 (en) | Integrated circuit package system with exposed interconnects | |
US7573136B2 (en) | Semiconductor device assemblies and packages including multiple semiconductor device components | |
US8125065B2 (en) | Elimination of RDL using tape base flip chip on flex for die stacking | |
KR100511728B1 (en) | Compact semiconductor device capable of mounting a plurality of semiconductor chips with high density and method of manufacturing the same | |
US6238949B1 (en) | Method and apparatus for forming a plastic chip on chip package module | |
US6469384B2 (en) | Unmolded package for a semiconductor device | |
US6906415B2 (en) | Semiconductor device assemblies and packages including multiple semiconductor devices and methods | |
KR0169820B1 (en) | Chip scale package with metal wiring substrate | |
US7459778B2 (en) | Chip on board leadframe for semiconductor components having area array | |
KR101119708B1 (en) | Land grid array packaged device and method of forming same | |
US6245598B1 (en) | Method for wire bonding a chip to a substrate with recessed bond pads and devices formed | |
US6841884B2 (en) | Semiconductor device | |
US6911737B2 (en) | Semiconductor device package and method | |
US6847102B2 (en) | Low profile semiconductor device having improved heat dissipation | |
US9461009B1 (en) | Method and apparatus for assembling a semiconductor package | |
US6339253B1 (en) | Semiconductor package | |
US6624008B2 (en) | Semiconductor chip installing tape, semiconductor device and a method for fabricating thereof | |
JP2002261192A (en) | Wafer level csp | |
US20090324906A1 (en) | Semiconductor with top-side wrap-around flange contact | |
KR970072341A (en) | A package in which a bump of a bonding pad and a built-in lead frame are bonded and a manufacturing method thereof | |
KR20030056400A (en) | method for fabricating chip scale package | |
KR19980034131A (en) | How to Form Flip Chip Structure | |
KR20040048457A (en) | Chip stack package |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20060618 |