TW564411B - Manufacturing method of multi-layered optical information record carrier - Google Patents

Abstract

A manufacturing method of optical information record carrier is disclosed, the optical information record carrier has plural layers of pits on the reflective surface to record data. The method comprises coating a reflective layer on a stamper having the pit pattern; then coating the radiation-setting adhesive polymer resin on a substrate having the other pit pattern and coated with a partial reflective layer; pasting the substrate onto a stamper coated with the reflective layer, irradiating ultraviolet light onto the resin to cure it, and peeling the stamper, so as to form two layers of reflective layer having the pit pattern; and finally, gluing the two substrates with polymer resin adhesive, so as to obtain a multi-layered optical information record carrier from which dual layers of recorded data can be read on both sides respectively.

Description

564411

[Application field of the invention] The present invention relates to a method for manufacturing an optical information record carrier, in particular, to an optical information recorder having a multilayer reflective layer of recorded data, such as a method for manufacturing a double-sided double-layer optical disc. [Background of the Invention] An optical disc is a storage medium that records data signals in the form of grooves and protruding portlons / pits on a disc-shaped thin plastic plate. Due to the high data density of the optical disc and the non-contact method of reading the data, it is not easy to cause data damage and the storage time is long. Therefore, the optical disc is widely used for storing audio, video and large software. _ The traditional optical discs (CD series) are single-sided and single-layer. A piece of twelve-centimeter directly controlled CD-ROM has a usable capacity of about 65MB. Digital audio-visual read-only optical discs (DVD-ROM), which have been launched in recent years, are available in single-sided double-layer, single-sided single-layer, double-sided single-layer, and double-sided double-layer specifications. For a 12-cm diameter DVD-ROM disc, the basic capacity of a single-sided single-layer disc is 4.7GB (DVD-5) and double-sided double-layer is 17GB (DVD-18). Muli's double-sided double-layer DVD-18 (17GB) discs, although there are specifications, have no commercial products. They are mainly produced in the bottle method. In the production of double-sided double-layer DVD-ROM discs, usually two 0.6 mm thick substrates 10 with double-layered recording data on one side are glued together, as shown in Figure 4a and 4b. Show. One of the substrates 10 has a first reflective layer 11 and a second reflective layer 12 on one surface, and a transparent polymer resin layer 1 is formed between the first reflective layer 11 and the second reflective layer 12. 3. The first reflective layer 11 and the second reflective layer 12 are recessed and recessed.

Page 6 564411 V. Description of the invention (2) Reflective surface of pit pattern protruding portions). In addition, the first reflective layer 11 may be, for example, a partial reflective layer made of Au and Si materials, and the second reflective layer 12 may be a total reflective layer made of A1 material. The surface uses an optical reading device to read two layers of recorded data. The two aforementioned substrates 10 with double-layer recording data are bonded with an adhesive 14, wherein the adhesive 4 is placed between the second reflective layers 12 of the two substrates 10, and then a double-sided double-sided film is completed. Layer of disc. s At present, for the production of double-sided double-layer read-only DVD discs, the technologies that can be used to form multiple layers of recorded data on a substrate are: injection molding, photopolymer method (ph〇t〇) Polymer ·, 2P) and spin-on stripping method (Spin-On And Peei; SOAP). ', For example, ity), there is a special tool, so the wear limit of the template with the reflective layer forming a double layer cannot always be caused.' After the data pattern of the mold is double-masked, paste j # 己 录 资料 (Consumption * Serious. ”Making thinner ^ The finished product's injection molding method is a template that divides plastic (polycarbonate) into a mold (cav male mold (moving surface) and female mold (fixing surface)) by high temperature and pressure. (Stamper) The thin film of the data pattern. Then, the optical disk substrate is formed on the thin film, and the method of forming the optical disk substrate on the thin film requires high temperature and high pressure. Therefore, the thickness of the thin film that can be manufactured by the injection method has the following specifications. Thermal stress or plastic shrinkage and deformation will reduce the yield of the product. The 2 method is to apply a layer of easily deformable polymer resin on a stencil.

564411

However, 4 uses Gao Qian to press the polymer resin against the template, thereby transferring the data pattern on the template to the polymer resin, and then irradiating it with ultraviolet light to harden it to form a film with a data pattern. The film is then bonded to a substrate with a data pattern on its surface and plated with a semi-reflective layer, so that the surface of the film with the data pattern is facing outwards, and a total reflection layer is plated, so a single-sided double-layer is formed. Disc. If two pieces of the single-sided double-layered light = the two reflective surfaces are bonded together with the total reflection surface, a double-sided ^ -layer optical disc, such as DVD-18, can be formed. The disadvantage of this method is that a high-pressure method is required to obtain a better transfer of the data pattern, which causes heavy consumption of the template. In addition, in the process of bonding the film to the substrate, it is easy to produce / package; the phenomenon of bubble or wrinkle reduces the yield of the product. -The mouth-to-mouth spin-coating stripping method (SOAP) is to drop a polymer resin solution onto a spin support! Stencil 'spin-coat the polymer resin solution onto the template. When the solvent of the amidine molecular resin solution is volatilized, a hardened film having a data pattern can be formed. The film is then adhered to a substrate with a data pattern on the ^ surface and plated with a semi-reflective layer, so that the thin surface with the data pattern faces outward, and is plated with a total reflection layer, so a single surface is formed Double-layer disc. If two single-sided double-layer "discs" are bonded together with the total reflection surface facing each other, a double-into: double-disc disc is formed. However, this method still requires the film and the substrate. The process of σ is prone to foam or wrinkles, which reduces the yield of the product. In order to solve the problems of severe stencil wear and low yield caused by the above manufacturing methods, it is necessary to provide a new manufacturing method.

Page 8 564411 V. Description of the invention (4) [Objective of the invention The manufacturing method of the present invention can be based on a template with a semi-reflective layer to glue the film and the subject. This method) to coat, privacy 'and avoid problems. A resin layer on a stencil according to the present invention includes the following steps; lifting and plating the surface, and the tree, the resin layer is separated; and, a stencil having a reflective layer according to the following steps of the present invention; a manufacturing method mainly including a A light-hardened second data pattern is coated on the first data layer, and the surface is bonded between the mold; a light beam is irradiated on the first reflective layer facet and the reflective layer of the other substrate is provided on one surface thereof. The main purpose of forming a substrate and providing a substrate is to provide a method to reduce the wear of the stencil, and to provide: = the purpose of the carrier, the method of the present invention, the substrate of the technology resin and the plate Adhesion eliminates the steps of manufacturing adhesive film and sheet bonding. The light-hardening resin can be spin-coated (spin coating does not require high temperature and pressure, which avoids the problem of blistering and wrinkles, thereby reducing the wear on the stencil. An optical information record carrier invented without thermal stress or distortion caused by residual stress: a first reflective layer is formed on the first and the first A substrate is provided with a second reflective layer on one surface thereof; the lipid layer of the substrate is interposed between the substrate and the stencil for hardening; the stencil is peeled off to adhere to the surface of the substrate having the reflective layer on the surface A method for manufacturing another optical information record carrier invented, comprising a first data pattern and a second data pattern,

Page 9 564411 V. Description of the invention (5) A second reflective reed · 耵 layer is formed on the off-surface surface, and a light-hardening resin layer is coated on the reflecting chip of the substrate; The first reflection layer; irradiating the resin layer with a light beam to: transform; separate the template from the first reflection layer; and glue the surface of the upper plate with the reflection layer to another soil phase. The surface of each substrate with a reflective layer is provided to further explain the technical content, features, and advantages of the present invention. The detailed illustrations are as follows: [Detailed description of the embodiment] As shown in "Figures 1a to 1f" This is the first preferred embodiment of the present invention. First, as shown in "Figure 1a", a second reflective layer 22, for example, a total reflection layer of aluminum, gold, silver, or silicon with a thickness of 60 nm, is formed by a vapor deposition method, an evaporation method, or a sputtering method. An upper surface of a stencil 30 is plated, and the upper surface has a pit pattern formed in advance. Then, the second reflective layer 22 is transferred with the same data pattern as the stencil 30. Next, as shown in "Fig. 1b", a second layer of radiation-setting adhesive polymer resin layer 23 (Adhesive Polymer resin) is coated on the second reflective layer 22 on the template 30. ). And • The method of coating the resin layer 23 may be, for example, a spin coating method and controlling the thickness of the resin layer 23 to 40 to 65 // m. Next, as shown in the "Figure lc", a substrate 20 having a thickness of 0.6 mm is provided, one surface of which has a pre-formed data pattern, and a reflective layer 21 'on the surface is the first reflective layer. 21, for example, may be a semi-reflective layer of gold, silver or silicon with a thickness of 18 nm. The substrate 20 may be conventional

Page 10 564411 V. Description of the invention (6) The method is produced by injection molding of polymethyl methacrylate (PMMA) or polycarbonate (PC). Then, as shown in "Fig. 1d", the surface of the substrate 20 with the data pattern is attached to the upper surface of the stencil 30, and the resin layer 23 is located between the first reflective layer 21 and the Between the second reflective layers 22. The resin layer 23 is irradiated with ultraviolet light 24 to harden it. Then, the stencil 30 is peeled, because the adhesion between the second reflective layer 22 and the stencil 30 is smaller than the adhesion between the second reflective layer 22 and the resin layer 23 after hardening, Therefore, as shown in the "Fig. 1e", two reflective layers 21 and 22 with data patterns are formed on the substrate 20 to obtain a dual layer one side optical disc 40. Finally, as shown in the "Figure le", the two second reflective layers 22 of the single-sided double-layered optical disc 40 and the other single-sided double-layered optical disc 50 are opposed to each other, and are bonded with an adhesive 25 , You can get a dual layer double side (dual layer double side) disc. "Figures 2a to 2g" shows a second preferred embodiment according to the present invention. First, as shown in "Figure 2a", a second reflective layer 22, for example, a total reflection layer with a thickness of 80 nm, such as Shao, gold, silver or Shi Xi, is vapor-deposited, evaporated, or sputtered. In the plating method, an upper surface of a stencil 30 is plated, and the upper surface has a pit pattern formed in advance. Then, the second reflective layer 22 is transferred with the same data pattern as the stencil 30. Next, as shown in "Figure 2b", a substrate 20 having a thickness of 0.6 mm is provided, one surface of which has a pre-formed data pattern, and a first reflective layer 21 is plated on the surface. Layer 21, for example, can be thick

Page 11 564411 V. Description of the invention (7) 10nm gold or silicon semi-reflective layer. The substrate 20 can be manufactured in a conventional manner by injection molding of polymethylmethacrylate (PMMA) or polycarbonate (PC). Next, as shown in "Fig. 2c", a light-setting adhesive polymer resin layer 23 (Adhesive Polymer resin) is coated on the first reflective layer 21 of the substrate 20. As a method of coating the resin layer 23, for example, a spin coating method (Spion coating) can be used and the thickness of the resin layer 23 can be controlled to 40 to 65 // m.

Then, as shown in "Fig. 2d", the first reflective layer 21 of the substrate 20 coated with the resin layer 23 and the upper surface of the stencil 30 are opposed to each other, and thus, the The resin layer 23 is interposed between the first reflective layer 21 and the second reflective layer 22. As shown in "Fig. 2e", the resin layer 23 is irradiated with ultraviolet light 24 to harden it. Then, the stencil 30 is peeled off, because the adhesion between the second reflective layer 22 and the stencil 30 is smaller than the adhesion between the second reflective layer 22 and the hardened resin layer 23. Then, as shown in "Fig. 2f", two reflective layers 21, 2 with data patterns are formed on the substrate 20 to obtain a dual layer one side optical disc 40.

Finally, as shown in the "Figure 2g", the two second reflective layers 22 of the single-sided double-layered optical disc 40 and the other single-sided double-layered optical disc 50 are opposed to each other, and are bonded with an adhesive 25, A dual-layer double-side optical disc can be obtained. In the above two embodiments, the step of stripping the template 30 is using the space between the second reflective layer 22 and the template 30. Low adhesion characteristics

Page 12 564411 V. Description of the invention (8) The second reflective layer 22 is separated from the stencil 30. However, in order to make it easier to separate the second reflective layer 22 from the stencil 30 when the stencil 30 is peeled off, the second reflective layer 22 may be plated on the stencil 30 as shown in FIG. 3. In the step of uranium ', a very thin layer of release agent 31 is coated on the stencil 30 in advance, and then the next step described above is performed. , ... The above are only the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make appropriate modifications without departing from the spirit of the present invention. For example, the substrate It can also be other thicknesses such as 1.2mni, 0.5, and 0.3 to meet the requirements of other specifications, and the thickness and material of a reflective layer and the second reflective layer can also be other. For example, the material can be Ming, silver, gold, copper, chrome, or 4 things :: need to be equal to = 5 and the thickness of the 5 xuanguang hardening resin layer can also be matched with different specifications, such as 10㈣ ~; Equivalent changes made in the scope of development

Page 13 564411 Brief description of the drawings [Simplified description of the drawings] Figures 1a to 1f are cross-sectional views of the manufacturing process of the first preferred implementation of the manufacturing method of the optical disc of the present invention. Figures 2a to 2g are cross-sectional views of the manufacturing process of the second preferred embodiment of the method for manufacturing an optical disc according to the present invention. Figure 3 is a cross-sectional view of a stencil. First, a very thin release agent is coated on the stencil, and then a reflective layer is plated. Figures 4a to 4b are cross-sectional views showing two single-sided double-layer optical discs, the reflective layers of which are bonded to each other, to form a double-sided double-layer optical disc. [Symbol description] 10 substrate 11 first reflective layer 12 second reflective layer 13 resin layer 14 adhesive 20 substrate 21 first reflective layer 22 second reflective layer 23 resin layer 24 ultraviolet light 25 adhesive 30 stencil 31 demolding Agent 40 single-sided double-layer disc

Page 14 564411 Schematic illustration 50 Single-sided double-layer disc

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Claims (1)

564411 VI. Scope of patent application1. A method for manufacturing a multilayer optical information record carrier, including at least the following steps: forming a second reflective layer on a stencil having a second pit pattern; A radiation setting resin layer is coated on the second reflection layer; a substrate is provided with a first data pattern on one surface, and a first reflection layer is plated on the surface; and the surface of the substrate is pasted Close the stencil, and the resin layer is between the substrate and the stencil; irradiate the resin layer with a light beam to harden it; and peel the stencil to separate it from the second reflective layer. 2. The manufacturing method of the multilayer optical information record carrier according to item 1 of the patent application scope further comprises the step of applying a release agent on the stencil before forming the second reflective layer. 3. The method for manufacturing a multilayer optical information record carrier according to item 1 of the scope of patent application, further comprising a step: after the step of peeling the stencil from the second reflective layer, the substrate and another The reflective layer substrate is bonded to each other in such a manner that the reflective layer faces the reflective layer. 4. The method for manufacturing a multilayer optical information record carrier according to item 1 of the scope of patent application, wherein the step of coating a photo-hardening resin layer on the second reflective layer on the stencil includes spin coating ( spinc ating) method to apply the resin layer. 5 · Manufacturing of the multilayer optical information record carrier as described in item i of the patent application Page 16 564411 VI. Scope of patent application Manufacturing method ', wherein the material of the second reflection layer is made of gold, copper, chromium, or silicon, from the group consisting of aluminum, silver, and gold. Any substance or combination 6. The multi-layer manufacturing method according to item 1 of the scope of patent application, wherein any one of the groups consisting of the -reflection layer; ', K from to, silver or silicon 7 · As described in item 1 of the scope of the patent application, multi-bank, raw ancient 氺, i made by the layer of the Gongxun record carrier: ,,,, Thickness is ~ 80 " 8.:::Special: The multilayer optical information record H described in item i of Erwei is included. The thickness of the substrate is 0.1 ~ " _. 9 .: A method for manufacturing a seed layer optical information record carrier, at least including the following steps: a data pattern (pi forms a second reflective layer on a stencil having a first pattern); and an I-plate is provided, with a surface having a The first data pattern is coated on the surface with a first reflective layer; the first reflection of the substrate is μ $ >. Τ. I. &Amp; coating a radiation setting resin Layer; attaching the first reflective layer of the substrate to the second reflective layer of the stencil, and the famous tree layer is interposed between the first reflective layer and the second reflective layer; irradiating the resin layer with a light beam To harden it; and to peel off the template to separate the fish from the town ’s reflection layer. Η Page 17 564411 VI. 11 12 13 14 15 Scope of patent application • The method for restraining a multilayer optical information record carrier as described in item 9 of the scope of patent application further includes: before forming the second reflective layer, Mold = step of applying a release agent. • The method for manufacturing a multilayer optical information record carrier according to item 9 of the patent application, further comprising a step of: after the step of peeling the stencil to separate it from the second reflective layer, the substrate and another The substrates of the reflective layer are bonded to each other in such a manner that the reflective layer is opposed to the reflective layer. . According to the method of preparing a multilayer optical information record carrier described in the application for patent No. 9, the step of coating a light-hardening resin layer on the first reflective layer of the substrate, The method includes applying the resin layer by a gravure coating method. The manufacturing method t Λ range Λ 9 items described in the multilayer optical information record carrier: copper, copper, and the second reflective layer are selected from aluminum, silver, and gold. σ σ 3 Any material in the group consisting of stones or brothers Any material in the group consisting of reflective materials, technical / personal people. The talent is selected from gold, silver or silicon. • If the ninth manufacturing method in the scope of the patent application, 苴 中 ^ Xixian Xianxian record carrier system η. / 、 In the thickness of the photo-hardening resin layer is 10_ ~ 8 "n" As in the manufacturing method described in the scope of the application for the patent, the bean,-* The thickness of the substrate in the manufacture of the arm xiangong record carrier " 〇.1 ~ h2_. 16