TW588347B - Method of fabricating discs - Google Patents

Abstract

A method of fabricating discs which are fabricated by gluing a substrate and a cover together. Present invention controls the birefringence of the cover in between -10 nm to 35 nm to overcome abnormality in mechanical characteristics and promote the life of discs.

Description

588347

The present invention relates to a disc manufacturing method, and particularly to a disc manufacturing method by adjusting the hyperbolic refractive index of a cover plate. Improving the phenomenon of disc curl

The low-cost magnetic laser light has matured and developed Versat. The two types of DVD-10 DVD-RW discs have the advantages of large storage capacity, low storage, and easy damage to data. They have a long life span. Human development or media development skills :: Therefore, the storage of digital audio and video discs (Digitai 1: 2) has gradually become the mainstream of the market. At the heart of the market: "Port can be divided into pre-recorded DVD and recorded DVD. Among them, pre-recorded DVD can be divided into DVD_5, DVD_9, and DVD-18, and recorded DVD can be divided into dvd — Types such as r,, and DVD-RAM. Figures 1 to 4 show the structural cross-sectional audio diagrams of four types of pre-recorded DVDs. First, please refer to FIG. 1. The DVD-5 disc is mainly composed of a substrate 100, a pre-recording layer 102, a reflective layer 104, an adhesive layer 106, and a cover plate 108. Generally, the production of DVD-5 is to make a pre-recorded layer 〇 02 and a reflective layer 〇 04 on the substrate 〇 00 ′, and then glue the substrate 100 to the cover plate 108 through an adhesive layer 106. Therefore, DVD-5 is a single-sided single-layer structure with a capacity of approximately 4.7GB. Next, referring to FIG. 2, the DVD-10 disc is mainly composed of a substrate 200, a pre-recorded layer 202, a reflective layer 204, an adhesive layer 206, a reflective layer 208, a pre-recorded layer 210, and a substrate 212. Generally, DVD-IO 10 is produced by pre-recording layer 202 and reflective layer 204 on substrate 200, and pre-recording layer 21 and reflective layer

9412twf.ptd Page 4 588347 V. Description of the invention (2) The layer 208 is fabricated on the substrate 212, and then the substrate 200 is bonded to the substrate 21 through the adhesive layer 206. Therefore, DVD-10 is a double-sided single-layer structure with a capacity of about 9.4 G B. Please refer to FIG. 3, the DVD-9 disc is mainly composed of a substrate 300, a pre-recorded layer 302, a semi-reflective layer 304, a pre-recorded layer 306, a reflective layer 308, an adhesive layer 310, and a cover plate 312. Made up. In general, the production of DVD-9 is to make a pre-recorded layer 302, a semi-reflective layer 304, a pre-recorded layer 306, and a reflective layer 30 on a substrate 300, and then the substrate 30 is passed through the adhesive layer 310 and The cover plate 312 is glued. Therefore, D = -9 is a single-sided double-layer structure with a capacity of about 8. 5GB. Please refer to FIG. 4 below. The DVD-18 disc is mainly composed of a substrate 400, a pre-recorded layer 402, a semi-reflective layer 404, a pre-recorded layer 406, a reflective layer 408, and an adhesive layer 410, The reflective layer 4 1 2, the pre-recorded layer 4 1 4, the semi-reflective layer 41 6, the pre-recorded layer 4 1 8, and the substrate 420. In general, the production of DVD-18 is to make a pre-recorded layer 402, a semi-reflective layer 404, a pre-recorded layer 406, and a reflective layer 408 on the substrate 40 (), and the pre-recorded layer 418 and the semi-reflective layer 416 , Pre-recorded layer 414, and reflection = 412 are made on the substrate 42, and then the substrate 400 is glued to the cover plate 420 by an adhesive layer "ο. Therefore, DVD-18 has a double-sided and double-layered structure, and the capacity is large. The amount is about 17GB. 'Figure 5 shows a schematic cross-sectional view of the structure of a recording DVD. Please refer to Figure 5. The recording dVD is mainly composed of a substrate 50 (), a pre-recorded layer 502, and a reflective layer 5 〇 ′, a glue layer 506 and a cover plate 508. A general recording type DVD is made by pre-recording a layer 502 and a reflecting layer 504 on a substrate 500, and then, the substrate 501 is glued The layer 506 is glued to the cover plate 508. The recording DVD can be divided into DVD-R, DVD-RW, and DVD-RAM types.

Page 5 V. Invention description (3): Two :, — R is a one-time record type tablet, which is similar, with a grain volume of 4.7 gb, but the difference is between the structure and the DVD-5 type. It is a recording bank ^ the disc is read and written by the substrate 500 and the reflective layer 504, and its copy is recorded in several layers. DVD-RW is a repeatable 4.7GB, D_RW structure and ^^ 1 About 100,000 times, its capacity is the same as the material of the recording layer 502, and its + is similar, but the difference is that it is recorded as a combination structure of rewritable discs / two-layer film. DVD-RAM Also its structure is similar to DVD-RW, except that the number is as high as about 100,0 times, and the number of materials and film layers is different. "The point is that the material of the recording layer 502 is known to be DVD-5, DV]), qu contains information The substrate and a cover glue are mainly substrates with different characteristics, so the glue: == the substrate and the cover are discs that cannot be read or recorded normally; to the discs ..., it may even cause light weight = after The characteristics will change with time. For reading equipment == normal reading or recording, can ... Therefore, the purpose of the present invention is to provide a disk made of a substrate and a gluing plate. In order to improve the quality and life of the disc, a disc manufacturing method is applied. The disc is controlled by the double zigzag 2 of the cover plate to achieve the above purpose of the present invention, and a method for manufacturing the disc is first proposed. A pre-recorded layer and a reflective layer 2 are sequentially formed, and then a cover is provided, and the hyperbolic refractive index of the cover at a radius of 23 mm is controlled to be between -10 nm and 35 nm. Finally, the substrate and the cover are glued to form a DVD-5 disc with 588347 V. Description of the Invention (4). In order to achieve the above purpose of the present invention, a substrate is first provided. The upper layer of the substrate, the semi-reflective layer, and a pre-recorded cover plate are double-folded at a radius of 23 min. Finally, the substrate and the cover plate are glued. A substrate is provided on the substrate. A cover is then provided and the transmittance is controlled between -10 nm to 35 nm < to form a DVD-9 disc. In the present invention, the reflective layer on the substrate and the cover substrate is, for example, a spatter bonding method such as a spin coating method, a screen printing glue method, and a patch is used to achieve the above-mentioned purpose of the present invention. The cover is between -1 Onm and 35 nm. In order to make the above-mentioned object of the present invention understandable, a preferred embodiment is exemplified as follows: ′ A method for manufacturing a disc is proposed. First, a pre-recorded layer and a reflective layer are sequentially formed. Then provide a cover and control the emissivity between -lOnui and 35nm. Form a DVD-9 disc. A disc manufacturing method is proposed, firstly forming a recording layer in sequence, and-double bending of the reflective cover plate at a radius of 23mm, and finally bonding the substrate to the cover plate, for example, by injection molding; forming by money; The substrate and cover are glued, hot melt glued, glued, and pressurized. A cover plate suitable for the hyperbolic refractive index, characteristics, and advantages of a substrate at a radius of 23 mm can be made more obvious and easy to use. In conjunction with the attached drawings, a detailed description of the drawings is given: 100, 2 0 0, 212, 300, 312, 4 0 0, 420, 50 0: substrates 102, 202, 210, 302, 306, 402, 406, 414, 418 ...

9412twf.ptd Page 7 588347

Pre-recorded layers 104, 204, 208, 308, 504, 408, 412: Reflective layers 106, 206, 310, 410, 506. Glue layers 108, 312, 508: Cover plates: 304, 404, 416: Figure 6 of the preferred embodiment of the semi-reflective layer is a block flow diagram of a disc manufacturing process according to a preferred embodiment of the present invention. Regardless of whether it is a pre-recorded type DVD or a recorded type DVD, both < are formed by bonding two substrates having a thickness of about 0.6 mm and a cover plate. The production of pre-recorded DVI) (as shown on the left) is first provided with a substrate. This substrate is formed, for example, by injection molding. Then, at least one pre-recorded layer and a reflective layer are sequentially formed on the substrate. For example, the reflective layer is formed by Formed by sputtering. After the reflective layer is formed, a cover plate is provided, and the double curvature of the cover plate at a radius of 23 ° is controlled to be between -10 nm and 35 nm, where the preferred range of the hyperbolic refractive index is between -10 nm to 20 nm. Finally, the cover is bonded to the substrate to form a pre-recorded DVD. The production of a recording DVD is similar to the production of a pre-recorded DVD, but the difference is that a pre-recorded layer is formed on the substrate instead of a recording layer. In this example, there are the following five types of gluing technology: (1) spin coating method, (2) hot melt adhesive pressure bonding method, (3) screen printing method, (4) patch glue Legal, and (5) pressurized glue. Among them, the method of rotary coating glue is mainly to use the rapid rotation of the disc to rotate the UV glue in the disc onto the entire disc, and then use UV light to dry it. This method has the advantages of low manufacturing cost and easy control method, but it is stable to the warpage of the disc.

9412twf.ptd Page 8 V. Description of Invention (6)

Poor, easy to receive light, hot-melt adhesives, laminating adhesives; shirt ringing, producing changes. The melting state and the use of rollers are mainly used to heat the molten edge using solid hot melt adhesive. This method has the advantage that the mechanical haiku is placed on the disc, and then the pressure and repair are easy to control the stable polarity of the disc warp, but the method is also changed. The car is bad, and it is easy to be affected by light and heat, and the screen printing blade is used to apply and control the UV glue, and there are more and more complicated methods of applying adhesive and plate glue. Polymerize and apply pressure to suppress warping, but the inner and outer brushes of this square are glued and evenly pressed. For production, this is also legally combined and applicable for gluing machines. The legally based extension of the current method of pre-curling will be published here. Therefore, if Taiwan is to converge. Like. It is not cost-effective to draw the U V glue onto the screen, the disc, and then use the UV light method to produce fast and stable mechanical characteristics, but this method is in the process cost. Using the mechanical characteristics of a double-sided tape-like bonding method, it is easy to grasp how the bonding between the cover plate and the substrate is expensive. Uv glue is irradiated with UV light, and the later UV glue is placed on the cover plate and the substrate. After the discs are pressed together, the disc produced by this method is mechanically south, the yield is low, and jj V Consistent disadvantages. Then use the post-shooting simultaneity to make it easier to process the cloth, and control the substrate, but this way to make the UV glue, and the metal sheet pressure characteristics good glue on the disc 7A, 7B and 7C The table lists the parameter values measured at the disc radii of 2 3mm, 45mm, and 57mm in this embodiment; Chu '' Le 8 A, 8B, and 8C respectively list the radius of the conventional disc 23mm, 45_ and

588347 V. Description of the invention (7) 5 The parameter values measured at 7mm. Figures 7A to 7C show the glued front cover double-curved and the glued front cover warped and kicked for discs 1 to 9.

The measurement of the amount of variation in the cover plate double curvature, the glued cover plate warpage, the glued substrate warpage, accelerated fI rear cover warpage, accelerated substrate warpage after the experiment, and acceleration of the disc warpage before the experiment. Figures 8A to 8C show the double-curved front cover for the second disc 21, the warped front cover warped, and after glued ^, the hyperbolic, the warped back cover, and the substrate warped and accelerated after being glued ^ Measurement of the amount of warpage of the cover plate after the test, the warpage of the substrate after the accelerated test, and the virtual warpage of the second accelerated test. , J silly system is the above-mentioned accelerated experiment is mainly designed for the weatherability of the disc, so the environmental conditions in the accelerated test are called weathering conditions. In this embodiment, the following conditions are added: The operating temperature is about 80 ° t and the operating humidity is about 85%. It is known as about 50 hours between k. Please refer to Fig. 7A and Fig. ^ At the same time, the production process of the 9th piece *, because the person is gone, the two-port T disc 1 ~ the disc is the hyperbolic system control amount of 23_ at the plunger plate diameter 23_ To "M, so the warpage of the disc before and after the accelerated experiment was changed from 0 to 20, _:.; 8, -0.32, -0.22, -0.m U · 19, and -0.35. In the 8th AWI, in the process of the mystery μ! Η, because the eye eight m Γ picture towel_slice 0 ~ disc 21 is made, it speeds up. The curvature of the hyperbola at a radius of 23mm has not been controlled. The warping changes of the 3 and 1 discs are 1.03, • U7, 1.07, 1.06, 1 12 and 1 ”1 ΟΠ 2: Γ and 1, 33. It can be compared from Figure 7A and Figure ".

9412twf.ptd Page 10 588347 V. Description of the invention (8) Next, please refer to the figure, and the above-mentioned phenomenon will also summarize the points mentioned above: 1 · The present invention causes warping 2 · The present invention has different mechanical characteristics 3 · Although the present invention of the reading device of the present invention is limited to the scope and scope of the present invention, it can be born in the reference formula when viewed from the rear. The disc song of the present is often asked for the disc Like. Ming has stated that any can be attached f7Bf; Figures 7C, 8B, and 8C σ 0 before and after the warpage change amount of the reduction of 45mm and 57mm position. Mingzhi's disc manufacturing method has at least the following advantages, which can prevent the disc's quality and compatibility from being improved due to the poor environment. The manufacturing method can overcome the problem of discs over time, which increases the life of the discs. The manufacturing method can avoid the warping of the disc and damage to a preferred embodiment. As disclosed above, it is not intended to be used by those skilled in the art, and it can be modified and retouched without departing from the essence of the present invention. Defined shall prevail.

94l2twf. Ptd

Page 11 588347 Brief description of the drawings Figures 1 to 4 show the structural cross-section diagrams of four pre-recorded DVDs, and Figure 5 shows the structural cross-section diagrams of recording DVDs; Figure 6 shows A block flow chart of a preferred embodiment of the disc manufacturing method of the present invention; FIG. 7A, FIG. 7B and FIG. 7C respectively list the parameter values measured by the disc of this embodiment at a radius of 23mm, 45mm and 57mm. ; And Figures 8A, 8B, and 8C respectively list the values of various parameters measured by conventional discs at radii of 23 mm, 45 mm, and 57 mm.

9412twf.ptd Page 12

Claims (1)

6. Scope of patent application1. A disc manufacturing method at least includes: providing a substrate; ^ forming a pre-recorded layer on the substrate; forming a reflective layer on the pre-recorded layer; providing a cover plate to control the cover The hyperbolic refractive index of the plate at a radius 23 anywhere is between -10 nm and 35 ηm; and the substrate and the cover plate are glued to form a disc. Wherein Wherein Wherein Hot melt adhesive 2. The substrate made of a plate as described in item 丨 of the patent application is formed by injection molding. ', 3. As described in item 1 of the scope of the patent application, the cover plate is formed by injection molding; 1 of the disc 1 & method 4 · As in the first scope of the patent application, the reflective layer is formed by sputtering. Said disc manufacturing method 5 · If the scope of the application for a patent is the first side of the method of joining the substrate and the cover plate 1, the disc manufacturing method described above is a laminating method, a screen printing glue, a dagger spin coating glue method, Hot melt adhesive is legal. σ removal, knee patching, and pressure-sensitive adhesive 6. If the pre-recorded layer is formed, the pre-recorded layer further includes the following disc manufacturing method after forming the pre-recorded layer, in which a semi-reflective layer is formed at the pre-j = step: formation A second pre-recorded layer is on: =, and 7 · -disc manufacturing layer C. Providing a substrate; including: forming a recording layer on the substrate; 9412twf.ptd 588347 6. Apply for a patent to form a reflective layer on the recording layer; provide a cover plate to control the hyperbolic refractive index of the cover plate at a radius of 23 mm between -10 nm and 35 nm; and the substrate Glued to the cover to form a disc. 8. The method for manufacturing a disc according to item 7 of the scope of patent application, wherein the substrate is formed by injection molding. 9. The method for manufacturing a disc as described in item 7 of the scope of patent application, wherein the cover plate is formed by injection molding. I 〇 The method for manufacturing a disc according to item 7 of the scope of patent application, wherein the reflective layer is formed by coin plating. II · The disc manufacturing method as described in item 7 of the scope of the patent application, wherein the bonding method of the 4 substrates and the cover plate includes a spin coating method, a hot-melt adhesive and a laminating method, a screen printing method, and a patch. Glue is legal, and pressurized is legal. 12. A cover plate suitable for gluing with a substrate to form a disc, wherein the cover plate has a hyperbolic refractive index ranging from ― 丨 nm to 35. 9412twf.ptd Page 14