EP1636836A1 - Verfahren zum herstellen von halbleiterchips - Google Patents
Verfahren zum herstellen von halbleiterchipsInfo
- Publication number
- EP1636836A1 EP1636836A1 EP04738778A EP04738778A EP1636836A1 EP 1636836 A1 EP1636836 A1 EP 1636836A1 EP 04738778 A EP04738778 A EP 04738778A EP 04738778 A EP04738778 A EP 04738778A EP 1636836 A1 EP1636836 A1 EP 1636836A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wafer
- semiconductor layer
- substrate wafer
- layer sequence
- auxiliary carrier
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/005—Processes
- H01L33/0095—Post-treatment of devices, e.g. annealing, recrystallisation or short-circuit elimination
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/40—Removing material taking account of the properties of the material involved
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/50—Working by transmitting the laser beam through or within the workpiece
- B23K26/53—Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/50—Working by transmitting the laser beam through or within the workpiece
- B23K26/57—Working by transmitting the laser beam through or within the workpiece the laser beam entering a face of the workpiece from which it is transmitted through the workpiece material to work on a different workpiece face, e.g. for effecting removal, fusion splicing, modifying or reforming
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/7624—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology
- H01L21/76251—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology using bonding techniques
- H01L21/76254—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology using bonding techniques with separation/delamination along an ion implanted layer, e.g. Smart-cut, Unibond
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/005—Processes
- H01L33/0093—Wafer bonding; Removal of the growth substrate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/028—Coatings ; Treatment of the laser facets, e.g. etching, passivation layers or reflecting layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/16—Composite materials, e.g. fibre reinforced
- B23K2103/166—Multilayered materials
- B23K2103/172—Multilayered materials wherein at least one of the layers is non-metallic
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
Definitions
- the invention relates to a method for producing a plurality of semiconductor chips, in particular radiation-emitting semiconductor chips, each with at least one epitaxially produced functional semiconductor layer stack.
- Radiation-emitting semiconductor structures based on compound semiconductor material fall in the present context in particular any semiconductor structure which is suitable for a radiation-emitting semiconductor component and which has a Has layer sequence of different individual layers and which contains at least one individual layer that contains a nitride III / V compound semiconductor material, preferably from the nitride III / V compound semiconductor material system In x Al y Ga ⁇ _ x .. y N with O ⁇ x ⁇ l , O ⁇ y ⁇ l and x + y ⁇ 1.
- this does not rule out the fact that, besides In, Al and / or Ga and N, the composition may also contain further elements.
- Such a semiconductor structure can have, for example, a conventional pn junction, a double heterostructure, a single quantum well structure (SQW structure) or a multiple quantum well structure (MQW structure).
- SQW structure single quantum well structure
- MQW structure multiple quantum well structure
- the present invention is based on the object
- a growth substrate wafer is connected to an auxiliary carrier wafer.
- the growth substrate wafer essentially comprises semiconductor material from a semiconductor material system that is the same or similar in particular with respect to lattice parameters as that on which the semiconductor layer sequence for the functional semiconductor layer stack is based.
- the auxiliary carrier wafer is permeable to high-energy electromagnetic radiation, in particular to aer radiation.
- a separation zone is formed parallel to the connection plane between the growth substrate wafer and the auxiliary carrier wafer, along which a part of the growth substrate wafer is separated after being applied to the auxiliary carrier wafer, so that only a part of the growth substrate wafer remains on the auxiliary carrier wafer.
- the separated part of the growth substrate wafer can advantageously be used for the production of further auxiliary carrier wafers / growth substrate wafer composites.
- the separation surface of the part of the growth substrate wafer remaining on the auxiliary carrier wafer is formed into a growth surface for a subsequent epitaxial growth of a semiconductor layer sequence of the semiconductor layer stack.
- the semiconductor layer sequence for the semiconductor layer stacks is in turn epitaxially grown on this growth surface.
- a chip substrate wafer is applied to the semiconductor layer sequence and the auxiliary carrier wafer is separated.
- a metallic contact layer and / or, as required for the production of thin-film light-emitting diode chips, a reflective layer or layer sequence can be applied before the application of the chip substrate wafer to the semiconductor layer sequence.
- electrical contact layers for example in the form of contact metallizations, can be applied to the semiconductor layer sequence on its side facing away from the chip substrate wafer before the combination of semiconductor layer sequence and chip substrate wafer is then separated into separate semiconductor chips.
- the semiconductor layer sequence is structured into a plurality of epitaxial semiconductor layer stacks arranged next to one another on the auxiliary carrier wafer even before the application of the chip substrate wafer. Thereafter, at least flanks of the epitaxial semiconductor layer stacks can be at least partially provided with passivation material. Furthermore, if necessary, the epitaxial semiconductor layer sequence can be provided with an electrical contact layer before the application of the chip substrate wafer.
- the separation zone is preferably generated by means of ion implantation, for example of hydrogen.
- the composite of subcarrier substrate and growth substrate along the separation zone is preferably separated by means of thermal blasting.
- thermal blasting Such a method is known, for example, from US 5,374,564 and from US 6,103,597, the disclosure content of which is hereby incorporated for reference.
- the auxiliary carrier wafer is separated. This is preferably carried out by means of a laser lifting process.
- the auxiliary carrier wafer is essentially completely separated from the semiconductor layer sequence or from the semiconductor layer stacks.
- auxiliary carrier wafer is separated to the extent that only those residues of the auxiliary carrier wafer remain on the semiconductor layer sequence or on the semiconductor layer stacks which can cause no or only a negligible impairment of the semiconductor layer sequence or the semiconductor layer stack Preferably the Subcarrier wafer completely separated.
- the auxiliary carrier wafer is, for example, transparent to electromagnetic radiation with wavelengths below 360 nm.
- the auxiliary carrier wafer is preferably adapted to the growth substrate wafer with regard to its coefficient of thermal expansion.
- the auxiliary carrier wafer advantageously does not have to be as single-crystalline as possible in a method according to the invention and is preferably polycrystalline.
- connection between the growth substrate wafer and the auxiliary carrier wafer can advantageously be produced by means of silicon oxide.
- the material of the growth substrate wafer is preferably likewise based on GaN.
- the auxiliary carrier wafer can preferably consist of sapphire and / or A1N.
- the growth area for the semiconductor layer sequence is advantageously prepared for the epitaxial growth by means of etching and / or grinding.
- a method according to the invention is particularly suitable for the production of defect-reduced semiconductor structures, in particular defect-reduced semiconductor structures based on nitride-IIl / V compound semiconductor material.
- Radiation-emitting semiconductor structures based on compound semiconductor material fall in the present context in particular any semiconductor structure which is suitable for a radiation-emitting semiconductor component and which has a Has layer sequence of different individual layers and contains at least one individual layer which contains a nitride III / V compound semiconductor material, preferably from the nitride III / V compound semiconductor material system In x Al y Ga 1-xy N with O ⁇ x ⁇ l, O ⁇ y ⁇ l and x + y ⁇ 1.
- a semiconductor structure based on GaN has, for example, at least one semiconductor layer which contains In x Al y Ga ⁇ -x - y N with O x x l l, 0 y y 1 1 and x + y 1 1.
- Such a semiconductor structure can have, for example, a conventional pn junction, a double heterostructure, a single quantum well structure (SQW structure) or a multiple quantum well structure (MQW structure).
- SQW structure single quantum well structure
- MQW structure multiple quantum well structure
- the part of the growth substrate wafer that is separated off during the method is preferably used for the production of further semiconductor chips and for this purpose with another
- the semiconductor layer sequence can be produced for example by means of organometallic vapor phase epitaxy (MOVPE), molecular beam epitaxy (MBE) and / or liquid phase epitaxy (LPE) or by means of another conventional method.
- MOVPE organometallic vapor phase epitaxy
- MBE molecular beam epitaxy
- LPE liquid phase epitaxy
- Removing the remaining part of the growth substrate wafer can, in particular, inexpensive high-performance light-emitting diodes high quality GaN quasi substrates.
- the GaN-based thin-film technology for the production of light-emitting diodes can be optimized by using defect-reduced and 'lattice-matched GaN quasi-substrates.
- Figure 2a to 2h is a schematic representation of the method according to a second embodiment.
- a plurality of light-emitting diode chips are produced on the basis of nitride III / V compound semiconductor material.
- a separation zone 4 which is essentially parallel to a main surface 100 of the growth substrate wafer, is formed in the growth substrate wafer 1 (cf. FIG. 1 a). This is preferably done by means of ion implantation (for example of hydrogen) through the main surface 100 of the growth substrate wafer 1 (indicated by the arrows 3).
- the separation zone 4 is located in the region of the growth substrate wafer 1 which is implanted with ions.
- a method of this type is known in principle, for example, from US Pat. No. 5,374,564 and from US Pat. No. 6,103,597.
- the growth substrate wafer 1 is connected to an auxiliary carrier wafer 2, preferably with the main surface 100 directed towards the auxiliary carrier wafer 2 (cf. FIG. 1b).
- the auxiliary carrier wafer 2 is transparent to high-energy electromagnetic radiation, in particular to laser radiation, which is used for a later laser lift-off process (as explained below).
- The is preferred
- the auxiliary carrier wafer 2 is preferably adapted to the growth substrate wafer 1 with regard to its coefficient of thermal expansion.
- the auxiliary carrier wafer 2 essentially consists, for example, of sapphire and / or A1N.
- the auxiliary carrier wafer 2 can advantageously be polycrystalline.
- the connection between the growth substrate wafer 1 and the auxiliary carrier wafer 2 can be established, for example, using silicon oxide.
- part 11 of the growth substrate wafer 1 facing away from the auxiliary carrier wafer 2 is separated off, preferably thermally blown off, along the separation zone 4 (cf. FIG. 1c).
- a method is known in principle, for example, from US 5,374,564 and from US 6,103,597.
- the separation surface of the part 12 of the growth substrate wafer 1 remaining on the auxiliary carrier wafer 2, which is exposed by the separation process explained in the previous paragraph, is subsequently prepared, for example by means of etching and / or grinding, in such a way that it becomes a growth surface 121 for an epitaxial growth of a semiconductor layer sequence 5 for the intended semiconductor structures suitable.
- the semiconductor layer sequence 5 is subsequently grown onto the growth area 121, for example by means of organometallic vapor phase epitaxy (MOVPE) (cf. FIG. 1d).
- MOVPE organometallic vapor phase epitaxy
- a for example metallic electrical contact layer 6 is applied to the side of the semiconductor layer sequence 5 facing away from the auxiliary carrier substrate 2.
- This contact layer 6 can consist, for example, of a conventional contact layer material suitable for the present semiconductor material system. Such contact layer materials are known to the person skilled in the art and are therefore not explained in more detail here.
- a reflective layer (not shown) can be applied between semiconductor layer sequence 5 and contact layer 6 or on contact layer 6.
- the semiconductor layer sequence 5 is then structured, for example by means of masking and etching, to form a plurality of semiconductor layer stacks 51 (measurement) (cf. FIG. 1e).
- a passivation layer 9 is subsequently applied to the flanks of the semiconductor layer stack 51.
- This can also consist of a conventional passivation material suitable for the present semiconductor material system.
- Such passivation materials are in turn familiar to the person skilled in the art and are therefore not explained in more detail here.
- the semiconductor layer stacks 51 are connected on their side facing away from the auxiliary carrier substrate 2, for example by bonding, to a mechanically comparatively stable chip substrate wafer 7 (FIG. 1f).
- This consists, for example, of Ge, but can also be made of another suitable electrically conductive chip carrier material exist.
- An example of this is GaAs.
- metals such as Mo or Au are also suitable.
- the auxiliary carrier wafer 2 is lifted from the semiconductor layer stacks 51 by means of laser radiation (indicated by the arrows 10 in FIG. 1g).
- Either the connection layer between the auxiliary carrier wafer and the remaining part of the growth substrate wafer, for example a silicon oxide bonding layer, or a semiconductor layer located at the interface to or in the vicinity of the connection layer is selectively thermally decomposed.
- a sacrificial layer can be applied to the auxiliary carrier wafer 2 before the auxiliary carrier wafer 2 is connected to the on-axis substrate wafer 1, which layer is then decomposed by means of the laser radiation in this lifting step.
- Thermal stresses in the structure during the irradiation by means of laser radiation facilitate the propagation of cracks in the bond plane.
- Suitable laser lift-off processes are known, for example, from WO 98/14986, the disclosure content of which is hereby incorporated by reference.
- the side of the semiconductor layer stack 51 which is thereby exposed is finished.
- electrical contact structures 8 can be applied, a roughening can be generated and / or a pass layer can be applied (cf. FIG. 1h).
- the combination of semiconductor layer stacks 51 and chip carrier wafer 7 is separated, for example by sawing and / or breaking the chip carrier substrate wafer 7, between the semiconductor layer stacks 51 to form individual light-emitting diode chips 20 (cf. FIG. 1 i).
- the method steps up to the application of the epitaxial semiconductor layer sequence 5 correspond to the corresponding method steps in the first exemplary embodiment (cf. FIGS. 1a to 1d).
- the semiconductor layer sequence 5 is, if necessary, including the contact view 6 and not structured into the semiconductor layer stack 51 prior to the application of the chip carrier substrate wafer 7, but only after the application of the chip carrier substrate wafer 7 (cf. FIG. 2e) and separation of the auxiliary carrier wafer 2 (see Figure 2f).
- the contact layer 6 is only indicated by dashed lines in FIG. 2d and is omitted in FIGS. 2e to 2h, since it is not necessary in the specific example.
- the epitaxial semiconductor layer sequence 5 is structured to form individual semiconductor layer stacks 51 and electrical contact layers 81, 82 are applied to the semiconductor layer stack 51 (see FIG. 2g). This can be done using conventional mask and etching technology or metallization technology.
- the combination of semiconductor layer stacks 51 and chip carrier wafer 7 is separated, for example by sawing and / or breaking the chip carrier substrate wafer 7, between the semiconductor layer stacks 51 to form individual light-emitting diode chips 20 (cf. FIG. 2h).
- the invention is of course not limited to the exemplary embodiment by means of the exemplary embodiment. Rather, the invention encompasses every new feature and every combination of features, which in particular includes every combination of individual features of the different claims or of the different exemplary embodiments, even if the relevant feature or the relevant combination. itself is not explicitly specified in the patent claims or exemplary embodiments.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10328543 | 2003-06-24 | ||
PCT/DE2004/001329 WO2005004231A1 (de) | 2003-06-24 | 2004-06-24 | Verfahren zum herstellen von halbleiterchips |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1636836A1 true EP1636836A1 (de) | 2006-03-22 |
Family
ID=33559742
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04738778A Ceased EP1636836A1 (de) | 2003-06-24 | 2004-06-24 | Verfahren zum herstellen von halbleiterchips |
Country Status (8)
Country | Link |
---|---|
US (1) | US7329587B2 (de) |
EP (1) | EP1636836A1 (de) |
JP (1) | JP5021302B2 (de) |
KR (1) | KR101178361B1 (de) |
CN (1) | CN100492610C (de) |
DE (2) | DE112004001619D2 (de) |
TW (1) | TWI240434B (de) |
WO (1) | WO2005004231A1 (de) |
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DE102015100686A1 (de) * | 2015-01-19 | 2016-07-21 | Osram Opto Semiconductors Gmbh | Verfahren zur Herstellung einer Mehrzahl von Halbleiterchips und Halbleiterchip |
DE102015107590A1 (de) * | 2015-05-13 | 2016-11-17 | Osram Opto Semiconductors Gmbh | Verfahren zur Verspiegelung von Mantelflächen von optischen Bauelementen für die Verwendung in optoelektronischen Halbleiterkörpern und oberflächenmontierbarer optoelektronischer Halbleiterkörper |
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DE102015121056A1 (de) | 2015-12-03 | 2017-06-08 | Osram Opto Semiconductors Gmbh | Verfahren zur Herstellung einer Mehrzahl von Bauelementen und Bauelement |
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DE102018104785A1 (de) * | 2018-03-02 | 2019-09-05 | Osram Opto Semiconductors Gmbh | Verfahren zur Herstellung einer Mehrzahl von transferierbaren Bauteilen und Bauteilverbund aus Bauteilen |
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DE19959182A1 (de) | 1999-12-08 | 2001-06-28 | Max Planck Gesellschaft | Verfahren zum Herstellen eines optoelektronischen Bauelements |
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2004
- 2004-06-16 TW TW093117312A patent/TWI240434B/zh not_active IP Right Cessation
- 2004-06-24 US US10/561,255 patent/US7329587B2/en not_active Expired - Fee Related
- 2004-06-24 EP EP04738778A patent/EP1636836A1/de not_active Ceased
- 2004-06-24 DE DE112004001619T patent/DE112004001619D2/de not_active Expired - Fee Related
- 2004-06-24 WO PCT/DE2004/001329 patent/WO2005004231A1/de active Application Filing
- 2004-06-24 JP JP2006515689A patent/JP5021302B2/ja not_active Expired - Fee Related
- 2004-06-24 CN CNB2004800178916A patent/CN100492610C/zh not_active Expired - Fee Related
- 2004-06-24 KR KR1020057024742A patent/KR101178361B1/ko active IP Right Grant
- 2004-06-24 DE DE102004030603A patent/DE102004030603A1/de not_active Ceased
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CN100492610C (zh) | 2009-05-27 |
DE102004030603A1 (de) | 2005-02-10 |
WO2005004231A1 (de) | 2005-01-13 |
CN1813347A (zh) | 2006-08-02 |
US20060211159A1 (en) | 2006-09-21 |
DE112004001619D2 (de) | 2006-08-10 |
US7329587B2 (en) | 2008-02-12 |
KR20060061305A (ko) | 2006-06-07 |
JP2007524224A (ja) | 2007-08-23 |
JP5021302B2 (ja) | 2012-09-05 |
KR101178361B1 (ko) | 2012-08-29 |
TWI240434B (en) | 2005-09-21 |
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