TW509925B - Manufacture method of multi-layer optical recording medium using spin coating molding - Google Patents

Abstract

This invention provides a manufacture method of multi-layer optical recording medium using spin coating molding. The invention primarily utilizes a spin coating process to homogeneously coat a polymer solution onto a substrate and uses a stamper to impress the recorded information onto the polymer solution layer before the polymer solution is completely cured. Therefore, the recorded information on the stamper can be duplicated at room temperature and mild pressure and the multi-layered optical recording medium can be produced in a mass quantity and with high stability.

Description

V. Description of the invention (1) Scope of application of the invention The present invention relates to a method for manufacturing an optical recording medium, in particular to a method for manufacturing a multilayer optical recording medium by means of spinning molding. [Background of the Invention] Today's traditional CD-series optical discs have a single-sided single-layer structure. For a 12-cm-diameter CD disc, its usable capacity is about 65 mM β. Readable optical discs have specifications such as single-sided single-layer junction 2, single-sided double-layer structure, double-sided single-layer structure, and double-sided double-layer structure. A 12-cm-diameter DVD-ROM disk is used. Two, the single-sided single-layer structure can be used with a basic capacity of 4.7GB (DVD-5), and the double-layered surface is 17GB (DVD-18). Currently, DVD-5 (4.7GB), (8.5GB) and DVD-10 (9 4GB) have been launched, but the main point, 8i 1? GB) Although there are specifications, bath P has not yet commercialized products, its main features are: There are bottlenecks in the production method. The specifications of double-sided double-layer DVD-ROM disks are two recording layers on a single-sided 0.6-second Ergo I plate (SUbStrate), and the two recording layers are plated with total reflection: f J 'SlN, etc. ) 'On the second recording layer, s (such as A1), and then there are three possible ways to record two single-sided double-recorded ^ β films: * To make a double-sided double-layer read-only DVD disc Shooting

Page 509925 V. Description of the invention (2) This method is to place two stampers with signals on the fixed and moving surfaces of the injection mold, and then press the plastic (such as Poly carbonate) directly into the mold with high temperature and pressure In the mold (Cavity), a film with a double-sided signal is emitted. This method requires high temperature and high pressure, which causes severe wear on the template. 'In addition, when the finished plastic product is taken out from the mold, its thickness must not be too thin.' Also, the distortion of the finished product is caused by thermal stress or uneven plastic shrinkage. It often exceeds the requirements of the specification, so this method is not feasible. (2) Manufactured by Photo-Polymer (2P) method: This method first coats a template with a signal that is easy to deform on the template that has been engraved with a signal, and then presses these polymer materials against the template with high pressure to transfer Print the signal on the template, and then use ultraviolet (UV) radiation to harden it (Cur ng), and then bond this hardened thin layer to another substrate that has a signal to record and needs a semi-reflective layer, and then The sputtering method is used to plate a total reflection layer on the pasted thin layer to form a single-sided double-layer optical disc structure. Glue the total reflection surfaces of two single-sided, double-layer substrates with a thickness of 0.6 mm. 'It can become a double-sided double-layer DVD disc (such as D ^ VD 18)' This method currently has Hitachi and In the United States — some companies such as Mo are actively conducting experiments. This method may produce DVD-18 discs such as DVD-18, but the disadvantage is that high pressure is required to obtain a good signal transfer. The abrasion of the template is serious. In addition, the bonding technology On the one hand, it is not easy to control high yields. (3) Produced by Spin-On And Peel (SOAP) method: This method is Spin — 〇n And

509925

Peel (SOAP) method for making a thin film, a compound solution is dropped on a rotating template, and then *, two kinds of gold: a molecular resin solution covers the entire template, a 疋 ′, and this molecular structure is formed into a layer The solvent containing 2 i molecular resin is hard and has a recording layer and is semi-reflective. This film is bonded to a substrate with another 1-layer continuous substrate to form a disc. The film is attached here. Tian A's first ^ Λ, ^ Λ, ^, the total reflection sound was plated on the film by sputtering method 4) ', which became a true single-sided double s (such as DVD-18). There is a method from the above example, we can see that the second and third methods are possible to make I-sided multilayer discs or dual-method cars (_ =), but both methods have thin film adhesion. The first disc manufacturing process on the substrate D is prone to cause bubbles or wrinkles on the garment ', which can cause difficulties in manufacturing yield. Therefore, the problem of the method of the present invention proposes a new method that does not require a thin film bonding process, rather than making a multilayer optical disc. Hirata Guyi [Objective and Summary of the Invention]

The main object of the present invention is to provide a method for making a multilayer optical recording medium with a high yield by avoiding a film and substrate adhesion process. Although the aforementioned 2P method and the SOAP method may produce single-sided multilayer or double-layer optical discs, etc. However, these two methods have the manufacturing steps of thin film substrate gluing, which can easily cause bubbles or wrinkles, resulting in a problem that the yield rate of the manufacturing process cannot be easily improved. The spin plating method (Spln Coating) used in the present invention and Pressing, scp), will avoid

V. Description of the invention (4) __ This film bonding process directly coats the polymer solution on the substrate, and then uses this polymer-soluble diya cloth's fork-type 0L. ^ _ Congli has not fully cured the stage Under the condition of a plate, a template with a ^ recording signal is directly pressed on this polymer solution film with a slight pressure, and at the same time, it is cured by using a purple ^ line to produce a ^, number layer. It is not necessary to use high-temperature and high-pressure manufacturing in the system, so it does not cause bubbles or wrinkles, not only can extend the life of the template, and can achieve a higher manufacturing yield. The first embodiment of the present invention is based on a blank plane, and the recording medium is divided by the SCP method. In the second embodiment, the second signal layer is produced by a method with a signal layer. In the third embodiment, the first embodiment and the second embodiment are used to make an early-face double-layer optical recording medium, and the total reflection is formed face-to-face with each other 5 ′. Optical recording medium: The fourth embodiment is the production of the first embodiment. QPD oL · M ^ ^ One body, do not make the first signal layer and the second signal layer, and double-layer optical recording medium . Optical recording on the substrate = The steps of making the signal layer by the SCP method are repeated, whereby the optical recording medium can be formed into layers, or even a single-sided optical recording medium can be formed. Next • For the detailed content and technology of the present invention, I will explain the details of the invention in conjunction with the drawings.] The method of making a multilayer optical recording medium unveiled in this month is 509925. 5. Description of the invention (5) Tuning first A polymer solution such as Acrylic polymer, Poly-Ether-Imide (PEI), Photo Imide (PI), such as polymer resin (Polymer Resien), is coated on a substrate by a spin coating method. The technical control of spin plating, such as the spin plating speed and the concentration of the polymer solution, 'makes the thickness of this polymer solution layer uniformly distributed in the range of about 10 # m ~ 1 0 0 // m, and then A template with a recording signal pattern is embossed on an incompletely hardened polymer solution layer at room temperature with a slight pressure to make a recording signal on this polymer solution layer. After the UV curing process, the template is Take it away, the spin-coated polymer solution layer can be turned into a signal layer with a recording signal. Repeating the SCP process multiple times can produce a multilayer optical recording medium with multiple signal layers. Based on this SCP The following specific embodiments can we method of Example embodiment step follows. Refer to the detailed implementation steps of the recording medium on the board (Mirror Substrate) shown in "Figures 1A to 1H", on a 2mm (or 0.6mm) blank planar base Coater ("Figure 1A"): Layer 12 on Substrate 10 ("Fig. 1B") A template 3 0 with a recording signal is used on the polymer solution layer 12 ("1C, this polymer solution layer 12 is hardened, and then the 1D picture [Example 1] First, please apply a single layer of double-layer optics with a thickness of 1. Coating machine (Spin-Polymer solution is 15 ~ 25). If it is not hardened, it will be cured, and the first signal layer 1 with information will be formed. 3 'is a diagrammatic illustration of the SCP method for making this embodiment by placing plate 10 on a spin >' spin-coating ', the thickness of which is approximately embossed with the message' '), while template 30 is removed,' '), in This thin

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rE3i uses a mputtering method to deposit a semi-reflective layer "(" The semi-reflective, medium, and semi-reflective layer 14 has a thickness of about 10 to 30 nm, and the substrate is a metal or dielectric material, such as gold (⑷, Ming (SiN) and '? G), Shi Xi (Sl), nitride 1 Lu (Α1Ν), silicon nitride on the other-Λ (Sic) and other materials, and then spin coating method 2 SCP' sub-solution layer 16 ("Figure 1 F"), and as described by the previous household), 'i 17 on the flood, a second signal layer 17 ("Figure 1 G" sex cake on this second signal layer 17) Sputtering method for another plating

The Beiren + reflective layer 14 is the same as the total reflective layer 20 ("The second one becomes a single-sided double-layer optical disc. Β" [Embodiment 2] Then, as shown in the "Figure 2A ~ 2F" " , Which is a diagram illustrating the detailed implementation steps of making a single-sided double-layer optical recording medium by using the SCP method on a substrate 40 having recorded information. This method is to emit a substrate having a thickness of 12 mm (or 0.6 mm) with recorded information. 40 ("Fig. 2A"), first apply a semi-reflective layer 42 ("Fig. 2B") by sputtering, and then place this substrate 40 on a spin coater and place it on the semi-reflective layer. The polymer solution layer 44 ("Fig. 2C") is coated thereon, and its thickness is about 60 mm. Then the information is imprinted on the polymer solution layer 44 ("" "Figure 2D"), after the polymer liquid-permeable layer 44 is hardened, the template 60 is removed to form a second signal layer 45 ("Figure 2E") with a message, and then is sputtered here The second data layer 45 is plated with a total reflection layer 50 ("Fig. 2F"), so that it becomes a two-sided double-layer optical disc.

509925 V. Description of the Invention (7) ~-[Embodiment 3] Please refer to "Figure 3" and "Figure 4", which are used to make double-sided double-layer optical discs (such as DVD-18) by the SCP method of the present invention. structure. Wherein, "the third picture" is the single-sided double-layer optical disc finally obtained in the first embodiment, including the substrates 10a, 10b, the first signal layers 13a, 13b, the semi-reflective layers 14a, 14b, and the second signal layer 17a, i7b and total reflection layers 20a, 20b; The two reflection layers 20a, 20b of the two single-sided double-layer optical discs face each other to form a complete double-sided double-layer optical disc If the diameter of the single-sided double-layer optical disc produced in the first embodiment used is 0.6 mm, and the embossed information is the specification of the DVD, then the two single-sided double-layered total reflection layers are bonded on the When combined together, it becomes double-sided and double-layered]) Vj) _l 8. The "Figure 4" is a single-sided double-layer optical disc finally obtained in the second embodiment, which includes substrates 40a, 40b, semi-reflective layers 42a, 42b, second signal layers 45a, 45b, and total reflection layers 50a, 50b. The total reflection layers 50a and 50b of the two single-sided double-layer optical discs are bonded to each other face to face to form a complete double-sided double-layer optical disc. [Embodiment 4] Please also refer to "Figure 5", which is a structure for manufacturing a single-sided three-layer optical disc by the SCP method of the present invention. Among them, the single-sided double-layer obtained from "Figure 1G" in Example 1 The optical disc, before the total reflection layer 20 has been added, is further subjected to a semi-reflective coating on the second signal layer 17 through the process of the steps from "i E picture" to "「 G picture "in the first embodiment. In layer 18, a third signal layer 19 is produced by the SCp method, and finally a total reflection layer 20 is sputtered to obtain a single-sided three-layer optical disc.

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The "picture Θ" is also a single-sided three-tone disc produced by the scp method of the present invention. Another is an example. Among them, the single-sided double-layer optical disc paid for "picture 2 E" in the second embodiment. Before the total reflection layer 50 has not been added, a semi-reflective layer 46 is sputtered on the second signal layer 45 through the process of the steps from "2B picture" to "2E picture" in the second embodiment, and the The third signal layer 47 is produced by the scp method, and then finally sputtered with ± total reflection, and it can also be obtained—one-sided, three-reflective layers on the reflective layer, and the optics of the signal layer are fixed according to the template on the template. The thin-film and thin-film method requires a high thickness and easy control of the temperature and T% pressure of the SOAP method. [Invention, = Example 4 As can be seen, repeat the following steps: form a semi-priority signal layer, then spin-coat The polymer solution layer is placed in half. Then, the imprinted template becomes another signal layer on the polymer solution layer of the polymer solution that has not been completely hardened. If the template is peeled off, multiple signal layers can be formed one after another, which can be remade. Release more recording media. The SCP method of the present invention does not require high pressure to replicate as with the 2p method. It has recorded Λ interest, which easily causes the problem of large abrasion of the template. In addition, compared with the 2P and SOAP methods, there is no adhesion in the manufacturing process. The present invention has more advantages in injection molding method. Because the injection temperature and pressure are high, the wear of the template is serious. At the same time, it is not easy to control the injection molding method below 100 vm, and the present invention can accommodate the knife δ. The membrane is between 1 〇 ~ 1 0 0 // m, no need to use high process. In summary, it can be seen that the present invention has considerable advantages over the counting method and the mechanical injection molding method. effect】

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The effect: The method disclosed in this article for making multi-layer optical recording media has a high degree of stability. 2 · Smaller, cocoa is suitable for mass production of recorded information on the ## g β / at room temperature and light pressure. Xi layer pre-learning recording medium · It is not necessary to use high temperature and high pressure to extend the life of the template; and the abrasion suffered by the Wenting plate is controlled by ~ 100 // m where the polymer solution layer is located. Signal layer thickness Although the present invention is disclosed in the foregoing preferred embodiments to limit the present invention, anyone skilled in the art is not in the spirit and scope above, but can make some modifications and retouches without departing from the protection of the present invention. The scope is subject to the scope of the attached patent application, so the present invention shall prevail. ^ U9925 _ Simple Description [Schematic Description] = 1 A ~ 1 Η The figure is a blank flat substrate by the SCP method of the present invention ▲ Figures 2A ~ 2F are steps for implementing single-sided double-layer optical recording media; Figures 2A ~ 2F are steps for preparing single-sided double-layer optical recording media on the board by using the scp method of the present invention; Figure 3 is a schematic diagram of the structure of a double-sided double-layer optical disc produced by the SCP method of the present invention; Figure 4 is a schematic diagram of another structure of a double-sided double-layer optical disc produced by the SCP method of the present invention; It is a schematic diagram of the structure of a single-sided three-layer optical disc produced by the SCP method of the present invention; and Figure 6: is another schematic diagram of the structure of a single-sided three-layer optical disc produced by the SCP method of the present invention. [Illustration of Symbols] 10 10a, 10b substrate 1 2 polymer solution layer 13, 13a, 13b first signal layer 14, 14a, 14b semi-reflective layer 16 rain molecular solution layer 17, 17a, 17b second signal layer 1 8 semi-reflective layer 1 9 Third signal layer 20, 20a, 20b Total reflection layer 3 〇 Template

Page 509925 Simple illustration of 40, 40a, 40b substrates 42, 42a, 42b semi-reflective layers 44 polymer solution layers 45, 45a, 45b second signal layers 46 semi-reflective layers 47 third signal layers 50, 50a, 50b total reflection layer 6 0 template parameter

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Claims (1)

The method of patent range 1 is to form a method for forming a recording layer containing recorded information by spin coating and molding. The method at least includes: a method of applying a polymer resin solution to the surface of the substrate of an optical recording medium by spin coating. A method of imprinting a message on the polymer resin solution with a package of 3 recorded messages before the resin solution is completely hardened; and curing the polymer resin solution, and The template is peeled off from the cured 'molecular resin solution, and the cured polymer resin solution becomes a means for recording the recording layer on which the message is recorded. • The method for forming a recording layer containing recorded information by spin plating and molding as described in item 1 of the scope of patent application, wherein the thickness of the polymer resin solution layer is between 10 # m ~ 100 // ffl . 3. The method for forming a recording layer containing recorded information by spin plating and embossing as described in item 1 of the scope of patent application, wherein the polymer resin is selected from Acrylic polymer, poiy-Ether-Imide (PEI), The group of Photo Imide (PI). 4 · A method for forming a recording layer containing Lü Jilu's information by spin plating and molding as described in item 1 of the scope of the patent application, wherein the southern molecular resin solution can be cured by ultraviolet irradiation (UV Curing). 5 · A method of forming a recording layer containing hexahedral δΐ interest by spin plating as described in item 1 of the scope of the patent application, where the bureau Page 15 6. Scope of Patent Application The molecular resin solution can be cured by natural curing. 6 · A method for manufacturing a multilayer optical recording medium by spin-plating molding, the steps include: providing a substrate having a first signal layer and a template having a recorded message pattern; ^ forming a semi-reflective layer on the first signal ^ Transfer coating a polymer resin solution layer on the semi-reflective layer; embossing the template on the incompletely hardened polymer resin solution layer, and curing the polymer resin solution layer into a second signal layer; The template is peeled from the second signal layer; and a total reflection layer is formed on the second signal layer to form a single-sided double-row optical recording medium. It is also said that the method of making a multi-layered optical recording medium by spin-plating molding as described in item 6 of the TJ patent scope, wherein the first signal layer is formed on the surface of two substrates. 8 · A method for making a multi-chip optical recording medium by spin plating and molding as described in item 6 of the scope of patent application, wherein the second signal layer with the first signal layer is made by the following steps: · Earth material length 1 for a blank A flat substrate is coated with the south molecular resin solution layer on the substrate; the template is imprinted on the incompletely hardened polymer resin solution layer, and the polymer resin solution layer is cured to become the first signal ^ and u Peel off the template from the first signal layer. Page 16, Patent Application Range 9 · The method of making a multilayer optical recording medium by spin-on-molding as described in item 6 of the patent application range, wherein the step of forming the total reflection layer further includes repeating the following steps to make To form a single-sided multilayer optical recording medium: ~ forming a semi-reflective layer on the aforementioned signal layer; spin-coating the polymer resin solution layer on the semi-reflective layer; imprinting the template on the incompletely hardened polymer resin solution layer, And curing the polymer resin solution layer into a signal layer; and peeling the template from the signal layer to form a plurality of layers of the signal layer successively. 10 · The method for producing a multilayer optical recording medium by spin-plating molding as described in item 9 of the scope of the patent application, which further comprises combining two substrates having a plurality of layers of the signal layer and combining the two layers opposite to each other to form a sheet. Double-sided multilayer optical recording medium. 1 1 · The method for producing a multilayer optical recording medium by means of a rotary key molding method as described in item 6 of the scope of patent application, which further includes combining two substrates having two layers of the signal layer and combining the two layers opposite to each other to form one piece. Double-sided double-layer optical recording medium. 1 2 · The method for producing a multi-layer optical recording medium in a spinnerite core as described in item 6 of the scope of the patent application, by adding UV to cure the polymer resin solution layer. 1 3 · A method for manufacturing a multi-layer optical recording medium by spin plating and embossing as described in item 6 of the scope of patent application, wherein the polymer resin solution layer can be cured by natural curing. Many are 4 as described in Item 6 of the Patent No. 4 of Zhong 4 Patent: Rotary molding method: an optical recording medium method, wherein the thickness of the polymer resin solution layer is between 10 // Π1 ~ 100 / ζιη . 5 · The method for producing a layer optical recording medium by spin-plating and compression molding as described in item 6 of the scope of patent application, wherein the polymer resin is selected from Acrylic p〇lymer, p〇iy — Ei; her—Imide (ρΕί) , Photo Imide (PI). 6 · The method for producing a layer optical recording medium by spin-plating and embossing as described in item 6 of the scope of patent application, wherein the thickness of the semi-reflective layer is about 10 ~ 30nm. A method for manufacturing a multilayer optical recording medium by a compression molding method, wherein a material of the semi-reflective layer is a metal or a dielectric material. 0 8 · A method for manufacturing a multilayer optical recording medium by spin plating and embossing as described in item 17 of the scope of patent application, wherein the material of the semi-reflective layer is selected from gold (Au), aluminum (A1), and silver Ug) , Silicon (Si), aluminum nitride (A1 N), nitride nitride (S i N), and silicon carbide (S i C). 9 · A method for manufacturing a multi-layer optical recording medium by spin plating and embossing as described in Patent Application Scope 6), wherein the material of the total reflection layer is a metal or a dielectric material. 0 · The method for producing a multilayer optical recording medium by spin plating and molding as described in the first gj member of the scope of patent application, wherein the material of the total reflection layer is selected from gold (Au), aluminum (Ai), and silver (Ag) , Silicon (Si), 509925 VI. Patent application scope The group consisting of aluminum nitride (A1 N), silicon nitride (S i N) and silicon carbide (S i C).