WO2011091634A1

WO2011091634A1 - Single side double layers disc and manufacturing method thereof

Info

Publication number: WO2011091634A1
Application number: PCT/CN2010/073292
Authority: WO
Inventors: 范继良; 杨明生
Original assignee: 东莞宏威数码机械有限公司
Priority date: 2010-01-27
Filing date: 2010-05-27
Publication date: 2011-08-04
Also published as: CN101794598A

Abstract

A single side double layers disc is disclosed. The single side double layers disc includes a blank substrate; a first recording layer, a semi-reflective layer, a buffering layer, a second recording layer and a total reflective layer formed on the blank substrate sequentially; a paper cover plate having a printed side and a relative adhesive side; a protective film formed on the adhesive side of the paper cover plate and pasted to the total reflective layer of the blank substrate. The single side double layers disc of the invention reduces the usage of the PC material, and could be reused.

Description

Single-sided double-layer optical disc and manufacturing method thereof

The present invention relates to an optical disc, and more particularly to a single-sided double-layer optical disc and a method of manufacturing the same. Background technique

DVD discs, Digital Versatile Discs, also known as Digital Video Discs, have the advantages of high storage density, small size, long shelf life, low cost, high compatibility, and low error rate. It has become the mainstream of optical information storage media. Technically, DVD discs are intended to cover home entertainment, computer and intelligence business in a single digital format. It has replaced laser discs and has received all the electronics. Support for enterprise and computer hardware companies, movies and music studios has become the most successful storage medium in the history of optical disc storage technology, which makes information flow more convenient and faster, and therefore plays an increasingly important role in social life.

DVD discs mainly include single-sided single-layer discs (DVD-5), single-sided double-layer discs (DVD-9), double-sided single-layer discs (DVD-10), and double-sided double-layer discs (DVD-18). in the form of an optical disc; single-sided double layer disc (DVD-9) as an example, the structure comprising two grooves machining DVD with the information recording substrate and the substrate _{L l} and the substrate and the bonded substrate to form a complete -9 CD-ROM, in the specific production process, two injection molding machines are required to be connected to the DVD disc production line. PC (full name: polycarbonate; English, Polycarbonate) material particles are respectively heated by two injection molding machines to form a thickness of 0.6mm. The disc substrate is prefabricated on the two substrates by the master disc at the time of injection molding to form L. Substrate and substrate, L. The substrate and the substrate are cooled and transferred to a sputtering unit, and a semi-reflective layer is sputtered on the information surface of the substrate. The semi-reflective layer material is usually silicon, and a total reflection layer is sputtered on the information surface of the substrate. The total reflection layer material is usually metal silver, aluminum, gold and alloys thereof; after the sputtering, the L _Q substrate and the substrate are reversely bonded by UV curing glue, and then cured by UV lamp irradiation, and finally completed after being tested. Production Process. However, the existing DVD-9 optical disc production method has the following disadvantages: First, two injection molding machines are required to press-paste the granular PC material into a L with an information recording groove. The substrate and the substrate, because the injection molding process itself is a high-temperature and high-energy process, so that most of the energy in the production process of the entire DVD-9 optical disc is consumed in this step; secondly, the PC material is derived from the petroleum industry and is formed in the pull material. When the PC material injected into the substrate is granulated, it also consumes a huge amount of energy, and the carbon emission is high. However, in the structure of the existing DVD-9 disc, both substrates are made of PC material, and the amount of PC material is large, Conducive to environmental protection and energy saving; Again, the prepared PC material is subjected to the secondary heating during the injection molding process, and the birefringence of the produced substrate is directly compared with that of the substrate directly formed in the PC material factory. The birefringence is high, which affects the quality of the DVD disc.

In summary, since the structure of the existing DVD-9 optical disc has two substrates, the manufacturing process is not only high in energy consumption, but also large in the amount of PC materials, resulting in a large amount of carbon emissions, which is disadvantageous to environmental protection requirements, and utilizes granularity. The secondary heating of the PC material by melting the substrate has a high birefringence and affects the quality of the DVD-9 disc.

Therefore, there is an urgent need for a single-sided, double-layer disc that saves PC material, is low in energy consumption, is environmentally friendly, and improves the quality of the disc. Summary of the invention

SUMMARY OF THE INVENTION One object of the present invention is to provide a single-sided, double-layer optical disc that saves PC material, is low in energy consumption, is environmentally friendly, and improves the quality of the optical disc.

Another object of the present invention is to provide a method for manufacturing a single-sided, double-layer optical disc single-sided double-layer optical disc which saves PC material, has low power consumption, is environmentally friendly, and can improve the quality of the optical disc.

In order to achieve the above object, the technical solution of the present invention is: providing a single-sided double-layer optical disc, comprising: a blank substrate, a first recording layer, a semi-reflective layer, a buffer layer, a second recording layer, a total reflection layer, and a paper a first cover layer formed on a surface of the blank substrate; the semi-reflective layer is formed on the first recording layer; the buffer layer is formed on the half On the reflective layer; the second recording layer is formed on the buffer layer; the total reflection layer is formed on the second recording layer; the paper cover has opposite printing surfaces and bonding surfaces, The protective film is formed on the bonding surface of the paper cover and Bonded to the fully reflective layer formed on the blank substrate.

Preferably, the printing surface of the paper cover is printed with an optical disc content label, and the paper packaging cover can first print the information label of the optical disc content on the printing surface of the paper cover without using the conventional In the manufacturing method, the cumbersome process of manufacturing the optical disc first and then printing the content label is reduced, and the investment of the optical disc manufacturing enterprise is reduced, and the cost is saved.

Preferably, the protective film is made of silicon oxide or silicon nitride, and the protective film protects the paper cover and the total reflection layer during the bonding process.

Also preferably, the buffer layer has a thickness of between 43 microns and 55 microns. The buffer layer can effectively prevent damage to the substrate by the lamination process during formation of the recording layer, and protect the reflective layer from signal damage. The first recording layer and the second recording layer each have a thickness of between 2 μm and 4 μm.

Accordingly, the present invention also provides a method for manufacturing a single-sided double-layer optical disc, comprising the steps of: (1) providing a blank substrate; (2) spin coating on a surface of the blank substrate to form a first a glue layer; (3) laminating the information recording tunnel on the first glue layer to form a first recording layer; (4) sputtering a semi-reflective layer on the first recording layer; (5) in the half The emissive layer is spin-coated to form a buffer layer; (6) spin-coating on the buffer layer to form a second glue layer; (7) laminating the information channel on the second glue layer to form a second recording layer; 8) sputter forming a total reflection layer on the second recording layer; (9) providing a paper cover having opposite printing and bonding faces; (10) on the paper A protective film is formed on the adhesive face of the cover sheet; (11) the paper cover plate on which the protective film is formed is bonded to the blank substrate on which the total reflection layer is formed by glue to form a single-sided double-layer optical disk.

Wherein, in the step (11), the glue is spin-coated on the total reflection layer.

Preferably, the steps (3), (5), and (7) further include a curing step of forming a first recording layer having an information tunnel by a curing process, and spin coating is formed on the semi-reflective layer. The buffer layer and the second recording layer on which the information film is formed with the information channel become firm and the quality is reliable.

Preferably, the printing surface of the paper cover is printed with an optical disc content label, and the paper packaging cover can first print the information label of the optical disc content on the printing surface of the paper cover without using the conventional In the manufacturing method, the cumbersome process of manufacturing the disc and then printing the content label is first, and the investment of the optical disc manufacturing enterprise is reduced, and the cost is saved. Preferably, the protective film is made of silicon oxide or silicon nitride, and the protective film protects the paper cover and the total reflection layer during the bonding process.

Compared with the prior art, the single-sided double-layer optical disc of the present invention includes a blank substrate, a first recording layer, a semi-reflective layer, a buffer layer, a second recording layer, a total reflection layer, a paper cover, and a protective film. The first recording layer is formed on a surface of the blank substrate; the semi-reflective layer is formed on the first recording layer; the buffer layer is formed on the semi-reflective layer; a second recording layer is formed on the buffer layer; the total reflection layer is formed on the second recording layer; the paper cover has an opposite printing surface and an adhesive surface, and the protective film is formed on The adhesive face of the paper cover is bonded to a total reflection layer formed on the blank substrate. The blank substrate has no prefabricated information, can be produced by a non-injection molding process, is suitable for mass production, and greatly saves cost, and at the same time eliminates the process of reheating the PC material by high temperature pressing and injection molding using an injection molding machine. In terms of reducing the energy consumption of the industrial chain, on the other hand, it reduces the birefringence of the PC substrate and improves the product quality. And the package cover plate replaces the PC cover in the existing DVD9 structure with an innovative paper cover, which not only saves the amount of PC material, but also reduces the carbon displacement, and does not cause damage during recycling. The environment is polluted and can be reused, which is environmentally friendly. Accordingly, the method of manufacturing the single-sided double-layer optical disc provided by the present invention also saves PC material, has low energy consumption, is environmentally friendly, and can improve the quality of the optical disc. DRAWINGS

1 is a schematic structural view of a single-sided double-layer optical disc of the present invention.

Figure 2 is a cross-sectional view taken along line A-A of Figure 1.

3 is a flow chart showing a method of manufacturing a single-sided, double-layer optical disc of the present invention. detailed description

In order to explain the technical content and structural features of the present invention in detail, the following embodiments are combined with The drawings further illustrate the same reference numerals in the different figures.

As shown in FIG. 1 and FIG. 2, the single-sided double-layer optical disc 100 of the present invention comprises a blank substrate 1, a first recording layer 2, a semi-reflective layer 3, a buffer layer 4, a second recording layer 5, and a total reflection layer 6. a paper cover 9 and a protective film 8, a first recording layer 2 is formed on a surface of the blank substrate 1; a semi-reflective layer 3 is formed on the first recording layer 2; a buffer layer 4 is formed on On the semi-reflective layer 3; a second recording layer 5 is formed on the buffer layer 4; a total reflection layer 6 is formed on the second recording layer 5; the paper cover 9 has an opposite printing surface And a bonding surface; a protective film 8 is formed on the bonding surface of the paper cover 9 and adhered to the total reflection layer 6 formed on the blank substrate 1; the printing surface of the paper cover 9 is printed There is a disc content label. The blank substrate 1 has a thickness of 0.6 mm, a mesopore diameter of 15 mm, an outer diameter of 120 mm, and no pre-fabrication information on the blank substrate 1. The thickness uniformity and warpage of the blank substrate 1 are required to be compared with the use of PC pellets through an injection molding machine. The injection molded substrate 1 is required to be equivalent; the first recording layer 2 is formed by spin coating a surface of the blank substrate 1 with a thickness of between 2 μm and 4 μm; the thickness of the buffer layer 4 is Between 43 micrometers and 55 micrometers, the buffer layer 4 can effectively prevent the damage of the substrate 1 by the lamination process during the formation of the recording layer, and the protective reflective layer prevents the signal from being damaged; the thickness of the second recording layer 5 is between A special resin of between 2 micrometers and 4 micrometers is formed by spin coating on the buffer layer 4; the size of the paper cover sheet 9 is the same as that required for the blank substrate 1, and can be obtained by the modern and mature paper industry, and the raw materials for the manufacture thereof are It may be a primary wood pulp or a recycled pulp. The protective film 8 of the paper cover 9 is made of silicon oxide or silicon nitride, and the protective film 8 protects the paper cover 9 and the total reflection layer 6 during the bonding process. , paper cover 9 The disc content label is printed on the brush surface, and the paper package cover can first print the information label of the disc content on the printing surface of the paper cover 9 without using the conventional manufacturing method to manufacture the optical disc first and then post printing. The cumbersome process of content labeling reduces the investment of optical disc manufacturing companies and saves costs.

As shown in FIG. 3, the manufacturing method of the single-sided double-layer optical disc 100 of the present invention comprises the following steps: (101) providing a blank substrate;

(102) spin coating on a surface of the blank substrate to form a first glue layer;

(103) forming a first recording layer by laminating the information information tunnel on the first glue layer; (104) forming a semi-reflective layer on the first recording layer by sputtering;

(105) spin coating on the semi-emissive layer to form a buffer layer;

(106) spin coating on the buffer layer to form a second glue layer;

(107) forming a second recording layer by laminating the information information tunnel on the second glue layer;

(108) sputtering a total reflection layer on the second recording layer;

(109) providing a paper cover having opposite printed and bonded faces;

(110) forming a protective film on the bonding surface of the paper cover;

(111) The paper cover sheet on which the protective film is formed is bonded to the blank substrate on which the total reflection layer is formed by a glue to form a single-sided, double-layered optical disk.

2, 3, the manufacturing method of the single-sided double-layer optical disc 100 of the present invention is described in detail. First, a blank substrate 1 is provided. The substrate 1 has no pre-fabricated information, and then is spin-coated on the blank substrate 1. The special resin of the layer 2 micrometers to 4 micrometers forms the first recording layer 2, and then enters the normal temperature laminating chamber prefabricated with the first information, the chamber is divided into the upper half cavity and the lower half cavity, and the upper half cavity is prefabricated first. The master of the information, and the mirror surface of the master is driven by the driving device to move up and down; the bottom of the lower chamber is made of quartz, the quartz material has a transparent cushion and the substrate 1 fixing device; the quartz material is equipped with a UV curing lamp; The lower chamber can be closed and connected to a vacuum system. The blank substrate 1 spin-coated with a special resin is placed in the fixing device, the upper and lower chambers are closed, the vacuum system operates to draw the chamber to a certain degree of vacuum, the master plate is pressed, and the first recording layer 2 is pressed. An information tunnel, and then the UV lamp is turned on to perform preliminary curing of the first recording layer 2. After the preliminary curing step, the first recording layer 2 can be continuously cured according to the degree of curing in the lamination process, and the continuing curing process is an optional process, The laminating process is completed under vacuum, and the generation of bubbles can be well avoided, thereby ensuring the quality of the lamination; after the curing is completed, the substrate 1 prefabricated with the first information is placed on the sputtering unit, in the first recording layer 2 Sputtering to form a semi-reflective layer 3, the material of the semi-reflective layer 3 can be the same material as in the existing DVD-9 product; then a layer of 43 micron to 55 micron thick material is spin-coated on the semi-emissive layer to form a buffer Layer 4, and UV curing the buffer layer 4; after the curing is completed, a special resin having a thickness of 2 μm to 4 μm is spin-coated on the buffer layer 4 to form a second recording layer 5, and then enters the prefabricated second information. Normal temperature laminating chamber Pressing on the second information recording layer 5 of a second tunnel, and then the UV lamp is turned on for the second recording layer 5 is cured; After curing is complete, the information is prefabricated with a second substrate is placed into an a sputtering unit is formed on the second recording layer 5 to form a total reflection layer 6 which can be made of the same material as in the conventional DVD-9 product, and then the substrate 1 which forms the total reflection layer 6 Feeding into the bonding station, waiting for bonding with the paper cover 9; while processing the blank substrate 1, a paper cover 9 is provided, and the paper cover 9 has a relative adhesive surface and printing First, a protective film 8 is prepared on the bonding surface of the paper cover 9. The material of the film layer may be silicon nitride, silicon oxide, etc., and the adhesive film layer and the reflective film layer are used during the use of the product. To the protective effect, the paper cover 9 on which the protective film 8 is prepared is fed into the bonding station, and the adhesive layer 7 is spin-coated on the total reflection layer 6 formed on the blank substrate 1 to form an adhesive layer 7 and bonded. Layer 纸 The paper cover 9 on which the protective film 8 is formed is bonded to the blank substrate 1 on which the total reflection layer 6 is formed to form a single-sided double-layer optical disk, which is bonded, cured, and finished after online quality inspection. The preparation process of the entire single-sided double-layer disc.

Since the single-sided double-layer optical disc 100 of the present invention comprises a blank substrate 1, a first recording layer 2, a semi-reflective layer 3, a buffer layer 4, a second recording layer 5, a total reflection layer 6, a paper cover 9 and a protective film 8. The first recording layer 2 is formed on a surface of the blank substrate 1; the semi-reflective layer 3 is formed on the first recording layer 2; the buffer layer 4 is formed on the semi-reflective layer 3; and the second recording layer 5 is formed on On the buffer layer 4; the total reflection layer 6 is formed on the second recording layer 5; the paper cover 9 has opposite printing and bonding faces, and the protective film 8 is formed on the bonding surface of the paper cover 9 and Bonding to the total reflection layer 6 formed on the blank substrate 1; since the blank substrate 1 has no pre-fabrication information, the existing substrate 1 is prevented from using an injection molding machine at the time of manufacture, and the granular PC material from the petroleum industry is to be used. The high temperature press-molding injection molding is performed as the substrate 1 , and the process of preparing the information recording groove on the two substrates 1 by the master in the process of injection molding, so that the blank substrate 1 can be manufactured not only in large-area mass production, but also in mass production. Reduce carbon emissions, which is conducive to environmental protection; The optical disc manufacturing enterprise uses the injection molding machine to reheat the PC material to the high temperature press-injection molding process, thereby reducing the energy consumption of the industrial chain and saving a large amount of energy; reducing the birefringence of the PC substrate 1 and improving the product quality, thereby adapting In today's society, the trend of developing a low-carbon economy; in addition, the packaging cover 釆 uses an innovative paper cover 9, instead of the PC cover in the existing DVD9 structure, not only saves the amount of PC material, but also reduces the carbon emissions. It does not cause environmental pollution during recycling and can be reused. It is environmentally friendly.

The above are only the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and thus equivalent changes made in the claims of the present invention are still within the scope of the present invention.

Claims

Rights request

A single-sided, double-layer optical disc, comprising:

Blank substrate

a first recording layer, the first recording layer is formed on a surface of the blank substrate;

a semi-reflective layer, the semi-reflective layer is formed on the first recording layer;

a buffer layer, the buffer layer is formed on the semi-reflective layer;

a second recording layer, the second recording layer is formed on the buffer layer;

a total reflection layer, the total reflection layer is formed on the second recording layer;

a paper cover having opposite printing and bonding faces, and

A protective film formed on the bonding surface of the paper cover and bonded to the total reflection layer formed on the blank substrate.

The single-sided, double-layer optical disc according to claim 1, wherein an optical disc content label is printed on a printing surface of the paper cover.

The single-sided double-layer optical disc according to claim 1, wherein the protective film is made of silicon oxide or silicon nitride.

The single-sided, double-layer optical disc according to claim 1, wherein the buffer layer has a thickness of between 43 μm and 55 μm.

The single-sided double-layer optical disc according to claim 1, wherein the first recording layer and the second recording layer each have a thickness of between 2 μm and 4 μm.

A method of manufacturing a single-sided double-layer optical disc, comprising the steps of:

(1) providing a blank substrate; (2) spin coating on a surface of the blank substrate to form a first glue layer;

(3) forming a first recording layer by laminating the information information tunnel on the first glue layer;

(4) sputtering a semi-reflective layer on the first recording layer;

(5) spin coating on the semi-emissive layer to form a buffer layer;

(6) spin coating on the buffer layer to form a second glue layer;

(7) forming a second recording layer by laminating the information information tunnel on the second glue layer;

(8) sputtering on the second recording layer to form a total reflection layer;

(9) providing a paper cover having opposite printing and bonding faces;

(10) forming a protective film on the bonding surface of the paper cover;

(11) The paper-based cover sheet on which the protective film is formed is bonded to the blank substrate on which the total reflection layer is formed by a glue to form a single-sided, double-layered optical disk.

The method of manufacturing a single-sided double-layer optical disc according to claim 6, wherein in the step (11), the glue is spin-coated on the total reflection layer.

The method of manufacturing a single-sided double-layer optical disc according to claim 6, wherein the steps (3), (5), and (7) further include a curing step.

The method of manufacturing a single-sided double-layer optical disc according to claim 6, wherein an optical disc content label is printed on a printing surface of the paper cover.

The method of manufacturing a single-sided double-layer optical disc according to claim 6, wherein the protective film is made of silicon oxide or silicon nitride.

11. The method of manufacturing a single-sided, double-layer optical disc according to claim 6, wherein the buffer layer has a thickness of between 43 micrometers and 55 micrometers.

The method of manufacturing a single-sided double-layer optical disc according to claim 6, wherein the first recording layer and the second recording layer each have a thickness of between 2 μm and 4 μm.