TW200303014A - Colored optical discs and methods for making the same - Google Patents

Abstract

Embodiments of optical discs and methods for making the same are disclosed. In one embodiment, the optical disc comprises: at least two plastic substrates (1) comprising a bonding layer and a data layer disposed therebetween, wherein at least one of the substrates (1) is a read side substrate comprising greater than or equal to about 0.01 wt% colorant, based upon the total weight of the read side substrate, and wherein the read side substrate has a UV Bonding Index of greater than or equal to about 0.5. One method for making the optical disc comprises: forming a first plastic substrate comprising greater than or equal to about 0.01 wt% colorant, based upon the total weight of the first plastic substrate, wherein a UV Bonding Index of the first plastic substrate is controlled to be greater than or equal to about 0.5, disposing a data layer between the first plastic substrate and a second substrate, bonding the first plastic substrate to the second plastic substrate with a bonding layer, and curing the bonding layer.

Description

200303014 ΑΊ Β7 V. Description of the invention (1) Comparison of related applications (read the precautions on the back before filling this page) This application is a US patent application filed on Dec. 17, 2001. Part of the serial application No. 683,346, he is incorporated in this specification for reference. BACKGROUND OF THE INVENTION The present disclosure relates to a data storage medium and is particularly related to a colored data storage medium. Digital multimedia discs (DVDs) have slowly but surely replaced compact discs (CDs). These formats provide significantly more storage capacity for compact discs (CDs) and can record up to 8 hours of high-quality digital audio and video content. The number of DVDs sold on the global market in 2001 was close to ten or more, and in 2004 I predicted that it would reach about four billion. The structure of DVD discs printed by employees' cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs has been changed to achieve high storage density of discs (the DVDs have the same overall size as CDs). The most significant and visible difference is that DVD discs are no longer made of a 1.2mm thick plastic substrate, but are made by bonding two 0.6mm substrates together (Jim Taylor, ed. Me Graw Hill "DVD Demystified: "), 1998. In addition, the laser wavelength for reading has changed from 780nm (near infrared spectrum part) for CD to 635 or 650nm (visible light spectrum) for DVD. DVD-5, DVD-9, DVD-10, DVD14, DVD-18, DVD-R, DVD-RW, etc.), the structure of DVD can be realized from single-sided / single-sided (DVD-5) to double-sided / Dual (DVD-18), not to mention recordable formats (such as DVD-R and DVD-RW). Affected by optics-5- This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 200303014 A7 _B7____ 5. Description of the invention (2) Strict specifications required by the Media Association (European Information and Information System Standards Association (ECMA) Specification No. 267 for 1.20mm DVD read-only discs) (Please read the notes on the back first Fill out this page again} and the fact that the laser wavelength in the visible spectrum makes DVD manufacturing a challenge The consumer property cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints the optical properties of the substrate for DVD is not the only requirement. For example, the size of the cavity in the DVD is small, which implies that DVD has more resin quality (impurity) than CD It is sensitive. Because of the thinner size (0.6 mm instead of 1.2 mm), DVD is more challenging to mold than CD. In fact, the rheology (flow characteristics) of resin is important and is Tightly controlled. Therefore, the inconsistency in the thickness of the disc is also a source of disc defects. The DVD is more sensitive to the existence of such defects, because the DVD is not only thin and read in the visible light spectrum, but also Read at higher rotation / scan speeds than standard CDs. State-of-the-art multilayer DVD formats (such as DVD-9, DVD · 14, and DVD-18) represent the highest level of difficulty because one layer is completely reflective Layer and a layer of semi-reflective layer (with 2 layers of cavities, such as to form a geo-locator-like pattern). Single-layer DVDs (DVD · 5 and DVD · 10) have no semi-reflective layer and only contain One layer of cavity. Due to light Because of the disc structure differences, the reflectance requirements are very different between single-layer discs and multi-layer discs. So far, 'pre-recorded or recordable multi-layer DVD discs are available on the market. All are made of colorless resin. The only aesthetic difference between DVDs comes from the metal being plated (ie the data layer). For example, when using yellow gold, a gold dish is obtained. The same is true. When using silver, a silver alloy or absolutely silver is obtained. This paper scale applies Chinese National Standard (CNS) A4 specification (2 丨 0X297 mm) '' --- 200303014 A7 B7 V. Description of the invention (3) The invention's stem This invention discloses the optical disc and its manufacturing method. In one embodiment of the present invention, the optical disc includes: at least two layers of plastic substrates, and an adhesive layer and a data layer between the two substrates, wherein at least one of the plastic substrates is a reading surface substrate, and Contains a coloring agent greater than or equal to about 0.01 wt% (based on the total weight of the reading surface substrate), wherein the reading surface substrate has an ultraviolet adhesion index of greater than or equal to about 0.5. A method for manufacturing an optical disc includes: manufacturing a first plastic substrate containing a coloring agent (based on the total weight of the first plastic substrate) of about 0.01% by weight or more, wherein the ultraviolet light of the first plastic substrate is The adhesion index is controlled to be greater than or equal to about 0.5, and a data layer is arranged between the first plastic substrate and the second substrate, and the first plastic substrate and the second plastic substrate are bonded with an adhesive layer. And curing the adhesive layer. These and other features will be apparent from the brief descriptions, detailed descriptions, and accompanying drawings below. Brief description of the drawings refers to the following drawings, in which: FIG. 1 is a schematic illustration of the structure of a DVD-9; * FIG. 2 is a schematic illustration of a CD structure with a single reflective layer placed on the second surface of the substrate; 3 is a diagram of a DVD structure with a single reflective data layer placed in the substrate; this paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) ------- U--clothing -(Please read the notes on the back before filling out this page) Order printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Employees ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 200303014 A7 ____B7_ V. Description of the invention (4) Figure 4 Series A schematic diagram of a DVD structure with two reflective data layers (a semi-reflective data layer and a total reflective data layer) arranged in a substrate; FIG. 5 is a schematic diagram of a DVD structure with a single reflective data layer Description; Figure 6 is a schematic diagram of a DVD structure with two reflective data layers (the two layers are placed on opposite sides of the center of the substrate and can be read from different sides of the substrate); Layered reflective data layer (both layers are placed on two opposite sides of the center of the substrate, and both can be read from the same side of the substrate); DVD structure diagram; Figure 8 is a two-layer reflective data layer (where both layers are placed The DVD structure is illustrated on the same side of the substrate and can be read from the same side of the substrate); Figure 9 is a type with four reflective data layers (two layers are placed on each side of the center of the substrate, and the two layers can be read from A schematic illustration of the DVD structure on the substrate (read on each side of the substrate); Figure 10 is a schematic illustration of the light transmittance of several coloring agents (0.014wt%) in a 1.2mm polycarbonate substrate; Figure 11 is a test blend Graphical illustration of the transmittance curve; Figure 12 is a graphical illustration of the spectral distribution of a "D" type electrodeless bulb from Fusion UV Systems; Figure 13 is a graphical illustration of the incident energy percentage penetration through the substrate of a test blend; I '- ----- IT -------- * (Please read the precautions on the back before filling out this page) This paper size applies to China National Standard (CNS) A4 (21 (^ 297mm) -8 -200303014 A7 B7 V. Description of the invention 5 Figure 14 is a diagram of the absorption spectrum of Daicure Clear SD · 698 lacquer illustrating the details of the invention printed by the Consumer Property Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The DVDs currently found on the market are made of transparent (colorless) resin The transparent disc can exhibit good photoelectric properties (reflection, flutter, in-parity (PI) error, birefringence, etc.) and good mechanical properties (even after curing at 80 ° C and 85% relative humidity for 4 days). Radial / tangential / vertical tilt). In an attempt to manufacture a colored disc, we found that some colored blends had poor adhesion, and this finding was reflected in the mechanical properties of the disc (ie, radial / tangential / vertical tilt). In fact, some colored discs are completely outside the specification (for example, radial tilt greater than ± 800 millidegrees (mdeg)), so they cannot be considered as functional discs (for 1.20mm DVDs) as defined by industry standard specifications European Information and Information Systems Standards Association (ECMA) Specification No. 267 for read-only optical discs. 〇The adhesion problem is equivalent to an adhesive layer (also called lacquer or glue) used to adhere the two-layer plastic substrate of a DVD. Insufficient curing, and this adhesion problem can be found in any kind of discs using color and glue, such as any type of DVD format (such as single-layer type (such as DVD-5 and DVD-10), multi-layer type (such as DVD-9, DVD-14, DVD-18), etc.). Insufficient curing of the adhesive layer results in tilt defects or (in the worst case) the adhesion is completely ineffective (the two-layer substrate cannot be fixed to each other). The method of bonding the plastic substrate of the DVD disc can be UV (for example, (Please read the precautions on the back before filling this page). 11

Lf This paper size is applicable. National National Standard (CNS) A4 specification (210X29? Mm) -9-200303014 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Invention Description (6) 3 30 to 410mm ) A method of irradiating a glue (for example, a photosensitive curable adhesive layer) is performed. The controversy over the colored disc is that the colored substrate exhibits an absorption amount that depends on the amount of colorant used and the absorption of certain ultraviolet rays by chemical properties. When the amount of ultraviolet rays penetrating the plastic substrate is low (for example, less than 1% of ultraviolet rays penetrating the transparent substrate), a problem of adhesion occurs. Threshold energy is passed through the colored substrate to ensure proper adhesion of the substrate layer in the colored optical disc. The threshold energy is defined as the total spectral energy (watts) transmitted within about 3 3 0 to 4 1 0 n m. I should emphasize that the threshold energy in this specification is defined by the same curing time as the transparent substrate. I should understand that a lower threshold energy should be used in combination with a longer curing time. This can improve the efficiency of the absorption spectrum of the adhesive layer and promote adhesion. Typical curing time is within 3 seconds, and preference is within 2 seconds. However, the operating cycle will increase considerably, which has a negative impact on the manufacture of optical discs, so it is not an option. The threshold energy can be quantified based on a parameter called the "ultraviolet adhesion index", which is a function of the absorption spectrum of a colored substrate and the spectral distribution of the irradiation source. In order to obtain the UV adhesion index, we first calculated the product of the spectral energy output of the irradiation source and the transmission percentage through the colored plastic substrate as a function of the wavelength of the visible light spectrum across the ultraviolet. In the range of 330nm to the cutoff of the adhesive layer (that is, to the point where the adhesive layer no longer absorbs light) • The integral of this curve provides the total number of energy 穿透 that penetrates the colored substrate in the spectral range. The UV adhesion index number 能量 is provided by the ratio 値 of the total energy of the colored substrate to the energy (calculated in the manner described above) through the transparent substrate. Although I can use ultraviolet rays greater than or equal to about 0.5, this paper is sized according to the Chinese National Standard (CNS) A4 (210X29 * 7 mm) -10- n. N ί--HL I--II —i I— m! — —Ϋ -----. --- ------1- 1--»(Please read the notes on the back before filling this page) 200303014 A7 B7 V. Description of the invention ( 7) Adhesion index, but still prefer UV adhesion index greater than or equal to about 1.0, prefer UV adhesion index greater than or equal to about 2, and prefer UV adhesion index greater than or equal to about 4.0. I have found that I can use the following UV adhesion index: less than or equal to about 70, less than or equal to about 60, less than or equal to about 50, less than or equal to about 40, less than or equal to about 30, less than or equal to about 20, less than Or equal to about 10 and less than or equal to about 5. I can calculate the UV adhesion index for any bulb. Some available bulbs include: "D" bulbs from Fusion UV Systems, FQ 20007 bulbs from the Flash Pulse UV curing system (Marubeni / Origin DVD Bonder), DVD Edge Cure bulbs (M2 Corp), RC 742 bulbs (from Xenon c〇rp) and so on. In the same way, we can calculate the UV adhesion index of any adhesive layer (absorbing at least a part of the required spectrum of light). Some available adhesive layers include: Dairicure Series SD-693, SD-694, and SD-698 (Dainippon Ink & Chemicals, Inc.), Quretech DVD 065 and DVD 106, Kayarad MPZ-62, etc., and the aforementioned adhesives Synthesis of at least one of the layers. Referring to FIG. 1, a digital multimedia disc (DVD) includes two bonded plastic substrates (or resin substrates) 1, typically each having a thickness of less than or equal to 1.0 mm, and preferably less than or equal to 0.7 mm. A thickness of about 0.4 mm or more is also preferred. At least one substrate contains more than one (eg, 3, 5) data layers. The first data layer 3 (often referred to as layer 0 (or L0)) is closest to the read side (surface 7) of the disc. The second data layer 5 (often referred to as layer 1 (L1)) is the second closest to read surface 7. Typically, glue 9 is placed in the middle of L0 (3) and L1 (5), and any (please read the precautions on the back before filling this page), τ printed by the employee consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs

This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -11-200303014 A7 __B7 V. Protective coating or separation layer 11 of the invention description (8). A single-sided DVD (that is, read from a single reading surface 7 disposed on one side of the DVD) may further include a label 13 arranged on a D VD surface on the reverse side of the reading surface 7. In the case of a single-layer DVD (DVD5, DVD 10) read from the reading surface 7, the surface to be molded is coated with a thin reflective data layer by a sputtering method or another deposition method. This gives a metal coating, typically about 60 to 100 A thick. (See Figures 3, 5 and 6) For a two-layer data-layer DVD (read from the same reading side 7, such as DVD9, DVD14, DVD18), the laser must be accessible from the first layer when reading the disc 3 is reflected, but when reading the second layer 5, it also gathers or transmits through the first layer 3. (See Figures 4, 7, 8, and 9; DVD9, DVD9, DVD14, DVD18, respectively) So the first layer 3 is "translucent" (that is, semi-reflective), while the second layer 5 is "fully reflective" Sexual ". Under the current standards established by the Optical Media Association, the total reflectance and semi-reflective data layer measured under the laser wavelength according to the electrical parameter R14H (described in ECMA specification No. 267) is below the laser wavelength Metal spray bonding should be about 18% to 30%. In current DVD applications, the laser wavelength generally used is less than or equal to 700 nm, and the preference is about 400 nm to 675 nm, and the preference is about 600 nm to 675 nm. Although these metallization standards were developed for DVD data layers using colorless optical quality resin. However, these standards are also applied to DVD systems using colored resins. When the resin is colored, light can penetrate or be reflected from the substrate. The metal spraying characteristics and thickness on the semi-reflective layer and the total reflective layer (L0 (3) and L1 (5)) are suitable to allow light to penetrate the substrate. The required reflectance can be beneficial ------- i-- clothing-(Please read the precautions on the back before filling this page) Order 4. The paper printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs applies to this paper Chinese National Standard (CNS) A4 specification (210X297 mm) -12- 200303014 A7 B7 V. Description of the invention (9) It is obtained in the following way: the metal spray thickness is balanced with the reflectivity of the semi-reflective data layer 3 And adjust the thickness of the total reflective data layer 5 to ensure that the reflectivity of the data layer 5 is within the required specifications. The metallization of the individual data layers can be obtained using various reflective materials. We can use a reflective material (eg, metal, alloy, etc.) that is sufficient as a semi-reflective and / or fully reflective data layer, and the material can be suitably sprayed on the substrate. Some available reflective materials include: gold, silver, platinum, silicon, aluminum, and the like, as well as combinations of alloys and at least one of the aforementioned materials. For example, the first layer / second layer of reflective data layer metal spraying can be: gold / aluminum, silver alloy / aluminum, silver alloy / silver alloy, and the like. • In addition to the total reflectance of each layer 3, 5, the difference in reflectance between reflective data layers (e.g. layers 3, 5) should be limited to ensure sufficient layer reflectance. Conveniently, the difference in reflectance between layers (eg, first and second layers 3, 5) is less than or equal to about 5%, preference is less than or equal to about 4%, and preference is less than or equal to about 3.0%. . The difference in reflectivity between adjacent reflective data layers 3 and 5 has a preference of greater than or equal to about 0.5%, and a preference of greater than or equal to about 1%. The following should be noted: Although it is a description of the second layer, I understand that more than two layers can be used, and the reflectance difference between the layers should be as described earlier. The reflective data layer is typically sputtered or arranged on a pattern formed on the surface of the substrate through molding, for example, surface features (for example, surface features such as cavities, grooves, bumps, bumps, start / stop, etc.) ). Accumulation plating can include sputtering a layer of semi-reflective material on the patterned surface. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling this page. ) ▼ Binding and printing Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 200303014 A7 B7 V. Invention Description (10) (Please read the precautions on the back before filling this page). A layer of separation or protective covering can then be placed on the semi-reflective data layer. If a multi-layer data-layer DVD (such as DVD 14, DVD 18, etc.) is to be manufactured, a second patterned surface (such as stamped, etc.) can be manufactured on the side of the separation layer on the opposite side of the semi-reflective data layer. Then • A totally reflective data layer can be sputtered or placed on the separation layer. In addition, in terms of the structure of the DVD 14, the total reflection data layer may be deposited on the patterned surface of the second substrate (or resin plate). A separation layer or protective coating is then placed on one or both of the semi-reflective data layer and the total reflective data layer. An adhesive or glue can then be placed between the two substrates to bond the two substrates together to form an optical disc as illustrated in Figures 3.9. Optionally, the layers can be separated so that several semi-reflective data layers are arranged between adjacent layers. The reflectivity of the reflective data layer can be about 5% to 100%, which depends on the number of reflective data layers. If a single-layer reflective material layer is used, the reflectivity of the data layer should be about 30% to 100%. It is more suitable for the consumer property cooperative printed by the Intellectual Property Bureau of the Ministry of Economic Affairs to be about 35% to 90%, and more suitable. It is 45% to 85%. If a double-layer reflective data layer is used, the reflectivity of the data layer should be about 5% to 45%, more preferably about 10% to 40%, more preferably about 15% to 35%, and particularly preferably about 18% to 30%. Finally, if multiple reflective data layers (for example, more than two reflective data layers that can be read from a single reading surface) are used, the reflectance should be about 5% to 30%, and more preferably 5%. To 25%. A currently particularly suitable range is according to ECMA Specification No. 267, where the reflectivity of a double-layer DVD (for example, at least one total reflection layer and at least one semi-reflective layer) is about 18% to 30% or As far as this paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) ^ 200303014 A7 _B7____ V. Description of the invention (11) The reflectivity of a single-layer DVD (for example, a total reflection layer) is about 45 % To 85%. The substrate can include any optical quality plastic (for example, any plastic that can pass light with a wavelength in the range of about 60% to less than 94% in the laser light range). Within the transmission range, the transmittance should be greater than or equal to about 70%, more preferably greater than or equal to about 74%, and particularly preferably greater than or equal to about 78%. Depending on the type and amount of colorant used, the transmission rate can be less than or equal to about 92%, even less than or equal to about 88%, and even less than or equal to about 85% (depending on the type of colorant) . It should be mentioned below that the ability to achieve the required viscosity of the substrate becomes more difficult because the transmittance of the colored substrate is reduced. The plastic substrate may include a resin, such as an amorphous, crystalline, or semi-crystalline thermoplastic, a thermosetting plastic, or a combination of at least one of the foregoing plastics. Some available plastics include: polyethers, imines, polyetheretherketones, polyvinylchloride, polymethylene hydrocarbons (including but not limited to linear and cyclic polyolefins and polyethylene, including chlorinated polyethylene , Polypropylene, etc.), polyesters (including but not limited to: polyethylene terephthalate, polybutylene terephthalate, polycyclohexyl terephthalate, etc.), polyamides, Jushuo (Including but not limited to: polyether masters 'polyether ether masters, hydrogenated polyether masters, etc.), μ 醯 sublime㊣' polyamidoimides, polyliners, polyphenylene sulfide, poly Ether ketones, polyether ether ketones, ABS resins, polystyrenes (including but not limited to: hydrogenated polystyrenes, syndiotactic polystyrene and atactic polystyrene, polycyclic Hexyl ethylene, styrene-acrylonitrile copolymer, benzyl-maleic anhydride copolymer, etc.), polybutadiene, polypropylene noodles ((Please read the precautions on the back before filling this page)

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200303014 A7 B7 V. Description of the invention (12) (Please read the notes on the back and fill in this page first) Including but not limited to: polymethyl methacrylate, methyl methacrylate-polyimide copolymer, etc.), Polyacrylonitrile, polyacetals, polycarbonates, polyphenylene ethers (including but not limited to: polyphenylene ethers derived from 2,6-xylenol and copolymers and 2,3,6-tricresol, etc.) , Ethylene-vinyl acetate copolymer, polyvinyl acetate, liquid crystal polymer, ethylene · tetrafluoroethylene copolymer, aromatic polyesters, polyvinyl fluoride, polyvinylidene fluoride, polyvinylidene chloride, tetrafluoro Ethylene fluorocarbon copolymers (such as Teflon), epoxy polymers, phenolic resins, alkyd resins, polyesters, polyimides, polyurethanes, polysiloxanes, polysiloxanes, bismaleates Perylene imines, cyanates, vinyl resins, benzocyclobutene resins, and blends, copolymers, mixtures, reaction products, and composites of at least one of the aforementioned plastics. Conveniently, the substrate comprises polycarbonate, and substrates that are primarily polycarbonate (e.g., greater than or equal to 80% polycarbonate) are particularly preferred. "Polycarbonate", "polycarbonate composition" and "composition containing aromatic carbonate chain unit" used in the present specification include a composition having a structural unit such as formula (I): 〇 —Ri-〇—U—〇— (I) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs where at least about 60% of the total number of R1 groups are aromatic organic. The balance of the groups is aliphatic, A cycloaliphatic, or aromatic group. Conveniently, R1 is an aromatic organic group and prefers a group such as formula (II): -16- This paper size applies to China National Standard (CNS) A4 (210X29 * 7mm) 200303014 A7 B7 5 Explanation of the invention (13) wherein each of A1 and A2 is a monocyclic divalent aryl group, and Y1 is a bridging group having one or two atoms (Y1 separates A1 and A2). In an exemplary embodiment, one atom separates A1 and A2. Exemplary non-limiting examples of this type of group are -〇-, -S-, · S (〇)-, -S (〇2)-, -C (〇)-, methyl, cyclohexyl Methyl, 2- [2,2,1] -bicycloheptyl fork, ethyl fork, isopropyl fork, neopentyl fork, cyclohexyl fork, cyclopentadecane fork, cyclododecane fork, and adamantane fork. The bridging group Y1 may be a hydrocarbon group or a saturated hydrocarbon group such as a methyl group, a cyclohexyl group, or an isopropyl group. Polycarbonates can be produced by the interfacial reaction of a dihydroxy compound in which only one atom separates A1 and A2. The "dihydroxy compounds" used in this specification include: bisphenol compounds having the following general formula (III): I______. Fee II (Please read the precautions on the back before filling this page)

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, where 1 ^ and Rb each represent a halogen atom or a monovalent hydrocarbon group, and may be the same or different; p and q each independently represent an integer from 0 to 4 Xa represents one of the groups of formula (IV): T ΐ -C— or -C— (IV) wherein IT and Rd each independently represent a hydrogen atom or a monovalent linear or cyclic hydrocarbon group Group, IT is a divalent hydrocarbon group. Some demonstrative non-limiting examples of suitable dihydroxy compounds include the application of the Chinese National Standard (CNS) A4 specification (210X 297 male sauce) at this paper size. -17-200303014 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 Description of the invention (14) Dihydroxy phenols and dihydroxy substituted aromatic hydrocarbons are disclosed by the name or chemical formula (general formula or specific chemical formula) in US Patent No. 4,217,43 8. A non-exclusive list of specific examples of types of diphenol compounds that may be represented by formula (III) includes: 1,1-bis (4-hydroxyphenyl) methane; 1,1-bis (4-hydroxyphenyl) ethane ; 2,2-bis (4-hydroxyphenyl) propane (hereinafter referred to as "diphenol A" or " BPA "); 2,2-bis (4-hydroxyphenyl) butane; 2,2 -Bis (4-hydroxyphenyl) octane; 1,1-bis (4-hydroxyphenyl) propane; 1,1-bis (4-hydroxyphenyl) n-butane; bis (4-hydroxyphenyl) Phenylmethane; 2,2-bis (4-hydroxy-1-methylphenyl) propane; 1,1-bis (4-hydroxy-t-butylphenyl) propane; bis (hydroxyaryl) alkanes ( Such as 2,2-bis (4-hydroxy · 3-bromophenyl) propane); 1,1-bis (4-hydroxyphenyl) cyclopentane; bis (hydroxyaryl) cycloalkanes (such as 1, 1-bis (4-hydroxyphenyl) cyclohexane), etc .; and a combination of at least one of the above compounds. I can also use polycarbonates, which are made by the following methods: two or more different Dihydroxyphenols or copolymers of dihydroxyphenols with ethylene glycol or with a hydroxyl-terminated polyester or acid-terminated polyester or Dibasic acid or polymerization with hydroxy acid or with an aliphatic diacid, in this case we prefer to use carbonate copolymers rather than homopolymers. Generally, aliphatic diacids that can be used have 2 to About 40 carbon atoms. Suitable aliphatic diacid dodecenoic acid. Polyarylates and polyester-carbonate resins or blends of the two can also be used. We can also use branched chain type Polycarbonates, and blends of linear polycarbonates and branched polycarbonates. The branched polycarbonates can be added by branching agents during the polymerization (please read the back Note: Please fill in this page again) ▼ Binding. Order i0 This paper size is applicable to China National Standard (CNS) A4 specification (210X297 mm) -18- Printed by the Intellectual Property Bureau Staff Consumer Cooperatives 200303014 A7 ________ B7 V. Description of the invention (15). These branching agents can contain polyfunctional organic compounds containing at least three functional groups (Ethyl, Endyl, Phosphoric Acid, Halomidine), and the aforementioned groups. Mix of at least one of Specific examples include: trimellitic acid, trimellitic anhydride, trimellitic acid chloride, tri-p-hydroxyphenylethane, isatin-diphenol, triphenol TC (1,3,5-tri (p-hydroxybenzene (Isopropyl) benzene), triphenol PA (4 (4 (1,1-bis (p-hydroxyphenyl) -ethyl) αdimethylbenzyl) phenol), 4-chloroformamidinephthalic anhydride, Trimellitic acid and benzophenone tetra-residual acid, etc. We can add branching agents at a level of about 0.05 to 2.0 wt% based on the total weight of the resin. Branching agents and branched polycarbonates The method is disclosed in U.S. Patent Nos. 3,6 3,5,895,5 and 4,001,184. All types of polycarbonate end groups are encompassed by the present invention. Suitable polycarbonates are mainly diphenol A, in which each of A1 and A2 is p-phenylene, and Y1 is isopropylidene. Conveniently, the average molecular weight of polycarbonate is about 5,000 to 100,000, more preferably about 10,000 to 65,000, and most preferably about 15,000 to 35,000. In the case of monitoring and assessing the synthesis of polycarbonates, it is of particular interest to determine the concentration of the Frisian product present in the polycarbonate. As mentioned, the apparent production of Fries products can lead to polymer branching, resulting in uncontrolled melting behavior. "Fris" and "Fris products" used in this specification represent repeating units in a polycarbonate having the formula (V): This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 Mm) I ----- r --------- IT ----- (Please read the notes on the back before filling this page) 200303014 A7 ________B7 V. Description of the invention (16)

Equipment-(Please read the notes on the back before filling out this page) where Xa is a divalent group related to the above formula (ΠΙ). The polycarbonate composition printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs may also include various additives generally incorporated in the polycarbonate composition. Such additives are, for example, additives or enhancers; heat stabilizers; antioxidants; light stabilizers; plasticizers; antistatics; release agents; additional resins; hair &foam; foaming agents; etc., And a combination of at least one of the above-mentioned additives. Examples of the filler or reinforcing agent include: glass fiber 'asbestos' carbon fiber, silica, talc and calcium carbonate. Examples of heat stabilizers include: triphenyl phosphite, tris (2,6-dimethylphenyl) phosphite, 'tris (mixed mono and dinonylphenyl) phosphite, xylene phosphonic acid 'And trimethyl phosphate. Examples of antioxidants include: octadecyl 3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, and pentaerythritol tetrakis [3_ (3'5-di-tert-butyl-4_hydroxy) Phenyl) propyl] ester. Examples of light stabilizers include: 2- (2-hydroxy · 5 · methylphenyl) benzotriazole, 2- (2-hydroxy-5-t-octylphenyl) benzotriazole, and 2-hydroxy- 4_n-octyloxybenzophenone. Examples of plasticizers include: dioctyl 4,5-epoxy-hexahydrophthalate, tris (octyloxyethyl) isocyanurate, tristearate, and epoxidized soybean oil. Examples of the antistatic substance include glycerol monostearate, sodium stearyl sulfonate, and sodium dodecylbenzenesulfonate. Examples of the release agent include stearyl stearate, beeswax, montan wax, and paraffin. Examples of other resins include but are not limited to -20- This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) 200303014 A7 B7 V. Description of the invention (17) In: polypropylene, polystyrene, polymethylmethacrylate Methyl acrylate and polyphenylene oxide. Any of the foregoing additives is used. Such an additive can be mixed at an appropriate time during the mixing period of the components for manufacturing the composition. In addition to the polymer and the colorant, the composition may optionally include various additives generally incorporated into this type of resin composition. Such additives may include: ultraviolet absorbers; stabilizers; such as photothermal stabilizers (such as acidic trivalent phosphorus-based compounds); hindered phenols; zinc oxide, zinc sulfide powder or a combination of both; lubricants ( Mineral oil, etc.); plasticizers; antioxidants; antistatic substances tetraalkylammonium sulfonate, tetraalkylphosphonium benzenesulfonate, etc.); release agent pentaerythritol tetrastearate; glycerol monostearate, etc.) And a combination of at least one of the foregoing additives. For example, the substrate may contain: about 0.1% to about 0.1% by weight of a thermal stabilizer; about 0.1% to about 0.2% by weight of an antistatic substance; and about 0.1% to about 1% by weight of an antistatic substance. Release agent (based on the total weight of the polymer). Some useful antioxidants include: organic phosphites such as tris (nonylphenyl) phosphite, tris (2,4-di-t-butylphenyl) phosphite, bis (2,4-di-t-butyl) Phenyl) pentaerythritol diphosphite, distearyl pentaerythritol diphosphite, etc .; alkylated monophenols, polyphenols, and alkylation reaction products of polyphenols and diene, such as tetrakis (3,5-di-tert-butyl-4-hydroxyhydrocinnamate)] methane, 3,5-di-tert-butyl-4-hydroxyhydrocinnamate stearyl, 2,4-di-tert-butyl Phenylphosphites, etc .; Butylation reaction products of p-cresol and dicyclopentadiene; alkylated hydroquinone; hydroxylated thiodiphenyl ether; alkylidene phenol; this paper is applicable to China National Standard (CNS) A4 specification (210X 297 mm) (Please read the notes on the back before filling out this page), 1. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-21-200303014 A7 B7 V. Description of the invention ( 18) (Please read the notes on the back before filling this page) Benzyl compounds; / 5 · (3,5-di-tert-butyl · 4-hydroxybenzene ) -Esters of propionic acid and mono- or polyhydric alcohols ;-( 5-tert-butyl-4-hydroxy · 3-.methylphenyl) -esters of propionic acid and mono- or polyhydric alcohols; sulfanyl groups Or esters of thioaryl compounds, such as distearylthiopropionate, dilaurylthiopropionate, ditridecylthiodipropionate, etc .; 10,000- (3,5-di-tert-butyl) A combination of 4-hydroxyphenyl) propionic acid and the like, and at least one of the aforementioned antioxidants. To facilitate the processing of polymers, especially polycarbonates, catalysts can also be added to the extruder or other mixing device. Catalysts typically help control the viscosity of the resulting material. Available catalysts include: hydroxides such as tetraalkylammonium hydroxide, tetraalkylammonium hydroxide scale, etc., preference is given to diethyldimethylammonium hydroxide and tetrabutylammonium hydroxide scale. The catalyst can be used alone or in combination with a passivating agent such as phosphoric acid. In addition, water can be injected into the molten polymer during dosing and will leave in the form of water vapor through the vent holes to remove residual volatile compounds. The polymer printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is manufactured using the following appliances: reaction vessels that can properly mix various materials, such as single-bar or double-bar extruder, kneader , Blending machine and so on. The polymer is then formed into a substrate by molding, pressing, rolling 'molding or the like. Adhesives or adhesives (such as a separator or adhesive layer) connect adjacent substrates together. Any adhesive having the required optical quality can be used. Some useful adhesives include: glues (such as hot-melt adhesives), acrylic resins (such as transparent UV-curable acrylic resins (ie, preferences greater than or equal to UV-curable acrylic j: Greek acid resin)), and the like This paper size is applicable to China National Standard (CNS) A4 specification (210X297). ------ 200303014 A7 _ _B7 V. Synthesis of at least one of the adhesives of the invention description (19). Together with the adhesive, the separation layer may contain a transparent material. Some useful separators include UV-curable transparent resins. Typically, the thickness of the separation (adhesive) layer is close to or more than several hundred // m, and the usable thickness is less than or equal to about 100 # m. The current DVD format generally uses a thickness of about 40 // m to 70 // m . Colors can be added to the DVD, and a colorant can be incorporated into a substrate (e.g., a resin layer), a separation layer, a top cover, or any combination of at least one of the foregoing layers. The coloring of the disc can be obtained in several ways, such as using pre-colored resin in the substrate and / or the separator, mixing colorless resin and color concentrate in a molding machine, and using liquid or powder coloring methods ( Or a combination of at least one of these methods). Colorants are introduced by: adding during extrusion, physically mixing colorless flakes and color concentrates before molding, or coloring liquid or powder in a molding machine, colorants and The concentration is selected to meet DVD specifications. Even if a colorant is used, the transparency of the substrate (for example, greater than or equal to about 60% transparency at the reading wavelength) is maintained to obtain a bootable DVD. The transparency of the substrate is directly related to the amount of scattering particles present in the substrate and the size of the particles. If the particle is significantly smaller than the wavelength of visible light, the scattering is not significant. Since colorants can be a major source of scattering-causing particles, preference is given to filtering the colorants, especially to melt filtration methods, such as during addition in extrusion processes. Conveniently, the size of the filtered toner particles (and the aggregates of the particles) is less than or equal to about 200 nm (please read the precautions on the back before filling out this page) The paper size of the paper is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -23- 200303014 A7 B7 V. Description of the invention (20) 'Preference is less than or equal to about 50nm. Colorants are also preferred to be selected so that they dissolve in the material used to make the layer where the colorant is placed. Colorants that are soluble in the materials used to make the DVD layer include: dyes (for example, "flux dyes"), organic colorants, pigments, etc., which behave like dyes; that is, colorants (not The size of the aggregate formed) is greater than or equal to about 200 nm, and the size of the preferred aggregate is less than or equal to about 50 nm. Some suitable coloring agents include, but are not limited to, anthraquinones, camels, periones, indanthrones, quinones, azaanthracenes, oxazines, oxazoles Porphyrins, thia anthracenes, indines, thioindigos, naphthoxamines, cyanines, azaanthracenes, methanes, lactones, coumarins, dibenzoxazolylthiophenes (BB0T), tetracarboxylic naphthalene derivatives, monoazo and diazo pigments, triarylmethanes, amine ketones, distyryl biphenyl derivatives, and at least one of the aforementioned colorants A reaction product and blend. The factors that determine the plastic / colorant combination and the amount of colorant used are currently based on the above-mentioned DVD specification (EMCA specification No. 267). The light transmission and the concentration of the toner are balanced to obtain the reflectivity (about 18% to 30%) of the semi-reflective data layer and the total reflective data layer within the specifications of the colored multilayer DVD. The transmittance through the substrate (ie half a DVD) below the laser reading wavelength of the DVD is greater than or equal to about 60%. The amount of colorant and the characteristics of the colorant (such as the shape of the spectral transmittance curve) depend on the target color and transmittance. Figure 10 illustrates the different light transmittances of some common plastic colorants. The paper size is applicable to China National Standard (CNS) A4 specification (210 × 297 mm) I ------ if! (Please read the precautions on the back before filling (This page)

Printed by 1T Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -24- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 200303014 A7 _ B7 V. Description of the Invention (21) (Solvent Videt 13, Solvent Blue 97 and Solvent Green 28) o The colorant has a lower absorption coefficient at a desired wavelength (for example, 650 nm), so it exhibits the maximum transmittance at this wavelength, and this colorant is suitable. The choice of colorants with high absorption coefficients at the required wavelengths limits the maximum amount of colorant that can be used to obtain a functional multilayer DVD. Since a toner having a lower absorption coefficient at a desired wavelength can be used in a higher amount in a blend, it becomes easy to obtain a target color in a functional DVD. For example, Solvent Violet 13 is better than Solvent Blue 97 when trying to reach blue because it has a lower absorption coefficient at 650nm. Typically, the amount of colorant is greater than or equal to about 0.01% by weight, the preference is greater than or equal to about 0.02% by weight, the preference is greater than or equal to about 0.004% by weight, and the preference is greater than or equal to about 0.4% by weight. , The most preferred is greater than or equal to about 0.5 wt% (based on the total weight of the substrate containing the colorant). I further prefer the use of colorants, the proportion of which is less than or equal to about 3.0 wt%, more than less than or equal to about 2.0 wt%, more preferred is less than or equal to about 1.0 wt%, especially preferred is less than or equal to about 0.7 wt% . In addition to the reflective layer and the separation layer, we can also use layers such as: protective layer (such as paint), ultraviolet suppression layer, moisture barrier layer, stretch layer, etc., and a combination of at least one of these layers. This disclosure is further illustrated by the following non-limiting examples. Example This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) binding (please read the precautions on the back before filling this page) -25- 200303014 A7 V. Description of the invention (22) The following implementation examples The adhesion capabilities of five colored DVDs and one transparent DVD with respect to the total energy penetrating the substrate in the ultraviolet range were compared. Table 1 lists the details of the blends used. All six blends were blended and formed into flakes in a single worm press at 290 ° C. The sheet-like material was molded into a DVD using standard methods, and the disc was tested fully electronically (Audio Dev DVD Pro SA 300 Pulsetech Drive) and mechanically (Dr. Schenk PROmeteus MT 136). Table 1 Samples of blends (parts by weight%) AB c D E1 F Polycarbonate resin 100 100 100 100 100 100 Glycerol monostearate 0.03 0.03 0.03 0.03 0.03 0.03 Di (2,4-dicumylphenyl) ) Diphosphite 0.02 0.02 0.02 0.02 0.02 0.02 Solvent red 52 / macrolex red 5B 0.15 0.2 0.3 Solvent Red 207 / rosaplast red 601 0.4 Solvent Yellow 93 / macrolex yellow 3G 0.05 0.15 0.1 Solvent Violet 36 / macrolex violet 3R 0.01

During the molding of the transparent DVD, we can see that in the case of only the blends B and C, the paper size applies to the Chinese National Standard (CNS) Α4 specification (210 × 297 mm) ------- 1 pack — (please first Read the notes on the back, and then fill out this page) Order printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, printed by the cooperative -26- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, 200303014 A7 _______ B7_ V. Description of the invention (23) The layer cannot be fully cured. This kind of poor adhesion / adhesion of two plastic substrates reveals radial and tangential tilts that fall outside the specifications. The measurement of the mechanical parameters indicates that the tangential tilt in all the blends is within the specification ', but as expected, the measurement of the radial tilt is not in the specifications (for blends B and C only). (See Table 2) Table 2 Radial 1 hectare of slope and transmittance data of the sample Minimum exposure 1 Maximum exposure 1 Average exposure 1% Input / mdeg Input / mdeg1 Inclined mdeg Transmission 1 A -465 195 -3.5 86.67 B -1717 -1567 -1743 83.87 C -1808 -1845 -1467 83.42 D -382 -157 -364 81.96 E -290 -185 -235 87.17 F 101 262 223 82.8 i 800mdeg ------'-- Lu Zhongyi- ---- IT ------ 0--. (Please read the precautions on the back before filling this page) 1 Under the wavelength of laser light, use Hewlett Packard Spectrophotometer Model 8453 (UV-VIS-MIR spectrometer) The measured transmittance curves of the blends A to E across the ultraviolet-visible light region are shown in FIG. 11. These curves can be used to estimate the energy that penetrates the substrate at any wavelength (if the spectral distribution of the illuminating light source is known). For demonstration purposes, the paper size of the Fusion UV system is applicable. National National Standard (CNS) A4 (210X297 mm) 200303014 A7 B7 V. Description of the invention (24) The distribution of the D-type light bulb (Figure 12) can The percentage distribution of incident energy passing through each substrate is obtained (Fig. 13). The ratio of the total energy (obtained by integration) that penetrates the substrate from about 3 to 410 nm to the energy that penetrates the transparent substrate is made in Table 3 below. Table 3 is a comparison of the total energy of penetrating the disc-substrate in the wavelength range of about 330 to 41 Onm. The table is shown as a function of the percentage of energy penetrating the transparent substrate. In other words, the UV adhesion index is made in Table 3 below. In Table 3, we can clearly see that the blends B and C only have an incident light transmittance of 0.045%. This result is below the threshold level and results in poor adhesion. In other words, blends A, D, and F have been developed with light transmissions of 5.6%, 13.1%, and 49%, respectively. This result is above the threshold level (1%) and provides good adhesion. I ------ ·-«Installation-- (Read the precautions on the reverse side and then fill out this page) Order printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Table 3 Sample energy pair through the colored substrate Energy ratio (%) that penetrates through a transparent substrate (ultraviolet adhesion index) A 5.6 B 0.044 C 0.046 D 13.1 E 100 F 49 -28- This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 200303014

AB 5. Description of the invention (25) (Please read the notes on the back before filling this page) In addition, when the absorption of the photosensitive starter in the adhesive layer is known, the total energy absorbed by the starter can also be used It is calculated as follows: the product of the energy penetrating the substrate and the absorbance of the starter is integrated. Figure 14 shows the absorption spectrum of Daicure Cleai · SD-698 (measured in 0.1 wt% methanol solution, Japan's Sh i m a d z u spectrophotometer), which is an acrylic paint used for DVD bonding. The ratio of the total energy absorbed by the photosensitive starter in each of the substrates A to F to the energy absorbed by the photosensitive starter in the transparent substrate is shown in Table 4 below. Table 4 Percentage of the total energy absorbed by the sample photosensitizer to the absorbance in the transparent substrate A 4 B 0.042 C 0.045 D 11.3 E 100 F 49.9 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs By controlling the absorbance percentage of the colored substrate used in (eg, DVD), we can develop a strong blend for colored DVD with good electronic / mechanical properties and good adhesion. A photosensitive starter having an absorbance ratio of greater than about 1% results in an operable disc. Therefore, the absorbance of the photosensitive starter can be determined. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 200303014 A7 B7 V. Description of the invention (26) Then the colorant parameters are adjusted to achieve an ultraviolet bond index greater than or equal to about 0.05. Available colorant parameters include: colorant concentration, colorant type, and a combination of at least one of the foregoing parameters. The following should be mentioned: for similar colors (that is, samples B, C, and F, which are similar colors to the eyes), we get very different UV adhesion indexes, where B and C have Poor adhesion, F has good adhesion •. The following should be further mentioned: Even if the transmittance of F is lower than the transmittances of B and C at the laser wavelength, F can still get good adhesion. Although this example is described by the implementation of specific examples Inventions, but those skilled in the art will understand that various changes can be made and equivalents can be substituted for elements of the invention without violating the siege of the invention. In addition, many modifications can be made to adapt to a particular situation or material in accordance with the teachings of the invention (without violating the essential scope of the invention). Therefore, the present invention is not limited by the specific specific examples disclosed as the best mode for carrying out the present invention, but the present invention will include all of the specific implementation examples belonging to the scope of patent application. Component No. Description Adhesive plastic substrate (or resin layer) The first layer and the second layer of the reading surface I paper size suitable for the country (CNS) Α4 ^ γΐ () χ 29ϋ-) (Please read the note on the back first Please fill in this page again} _ Packing-Order printed by the Intellectual Property Bureau of the Ministry of Economic Affairs's Consumer Cooperatives 9 200303014 A7 B7 V. Description of the invention (27) Protective coating or separation layer 11 Label 13 (Please read the precautions on the back before filling out (This page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -31-This paper size applies to China National Standard (CNS) A4 (210X297 mm)

Claims (1)

200303014 Printed by A8, B8, C8 _ D8, Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 6. Application for patent scope 1 1. A method for manufacturing an optical disc, comprising: forming a first plastic substrate, the plastic substrate containing greater than or equal to about 0 .Olwt% of coloring agent (based on the total weight of the first plastic substrate), wherein the UV Bonding Index of the first plastic substrate is controlled to be greater than or equal to about 0.5; A data layer is disposed between the first plastic substrate and the second plastic substrate; the first plastic substrate is adhered to the second plastic substrate with an adhesive layer; and the adhesive layer is cured. 2. The method of manufacturing an optical disc as described in the first item of the patent application scope, wherein at the laser reading wavelength, the light transmittance through the first plastic substrate is about 60% to 94% or less. 3. The method for manufacturing an optical disc according to item 2 of the patent application range, wherein the light transmittance is about 70% to about 92%. 4. The method for manufacturing an optical disc as claimed in claim 3, wherein the light transmittance is about 74% to about 88%. 5. The method for manufacturing an optical disc according to item 4 of the patent application, wherein the light transmittance is about 78% to about 84%. 6. The method for manufacturing an optical disc according to the first patent application range, wherein the ultraviolet adhesion index is less than or equal to about 70. 7. The method for manufacturing an optical disc according to item 6 of the patent application scope, wherein the ultraviolet adhesion index is less than or equal to about 60. 8 · If you apply for the method for manufacturing optical discs under the scope of patent application No. 7, among which (please read the 4 notes on the back before filling. Install —: write this page), 1T This paper size applies Chinese National Standard (CNS) to Specifications (210 > < 297 mm) -32- 200303014 A8 B8 C8 D8 VI. Patent Application Scope 2 δ The ultraviolet UV bond index is less than or equal to about 50%. 9. The method of manufacturing an optical disc according to item 8 of the patent application, wherein the UV adhesion index is less than or equal to about 5.0. 10. The method for manufacturing an optical disc according to item 9 of the scope of patent application, wherein the ultraviolet adhesion index is less than or equal to about 30. 11. The method of manufacturing an optical disc as described in claim 10, wherein the ultraviolet adhesion index is less than or equal to about 20. 12. The method for manufacturing an optical disc according to item u of the patent application range, wherein the ultraviolet adhesion index is less than or equal to about 10. 13. The method of manufacturing an optical disc as described in the first item of the patent application, wherein the first plastic substrate contains a coloring agent greater than or equal to about 0.02 wt% (based on the total weight of the first plastic substrate). ). 14. The method for manufacturing an optical disc as claimed in the scope of application of the patent No. π, wherein the first plastic substrate contains a coloring agent greater than or equal to about 0.04% by weight. . 15. The method for manufacturing an optical disc according to item 丨 of the patent application scope, further comprising forming a plastic material from a plastic resin and a coloring agent, wherein the plastic material contains a coloring agent greater than or equal to about 0.01 wt% ( It is based on the total weight of the plastic material), and wherein the plastic material has the same toner concentration as the first plastic substrate; and the first plastic substrate is formed from the plastic material. 16. The method for manufacturing an optical disc according to item 1 of the patent application scope, further comprising forming a first plastic substrate from a plastic resin, wherein the plastic resin contains a different concentration of a toner than the first plastic substrate. This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) -33-------- r pack— (Please read the precautions on the back before filling this page), 1T Intellectual Property Bureau of the Ministry of Economic Affairs Printed by Employee Consumer Cooperatives 200303014 A8 B8 C8 ___ D8 ^, apply for patent scope 3 C, please read the precautions on the back before filling out this page} 17. If the method of manufacturing optical discs in the first scope of the patent application, it further includes Determine the absorbance of the photoinitiator in the adhesive layer, and adjust the parameters of the colorant to achieve a UV adhesion index greater than or equal to 0.05, where the parameter is selected from the following group: coloring Agent concentration, colorant type, and a combination comprising at least one of the aforementioned parameters. 18. · A method of manufacturing an optical disc, comprising: forming a plastic material from a plastic resin and a coloring agent, wherein the plastic material contains a coloring agent greater than or equal to about 0.01 wt% (based on the total weight of the plastic material); A first plastic substrate is formed from the plastic material, wherein the first plastic substrate has a UV Bonding Index greater than or equal to about 0.5, and wherein the plastic material has the same Colorant concentration; placing a data layer between the first plastic substrate and the second plastic substrate; bonding the first plastic substrate to the second plastic substrate with an adhesive layer; and the Ministry of Economic Affairs Printed by the Intellectual Property Bureau employee consumer cooperative to cure the adhesive layer. 19. The method of manufacturing an optical disc according to item 18 of the scope of patent application, wherein the ultraviolet adhesion index is less than or equal to about 40. 20. The method for manufacturing an optical disc according to item 19 of the scope of patent application, wherein the ultraviolet adhesion index is less than or equal to about 30. 21-The method for manufacturing an optical disc as claimed in claim 20, wherein the ultraviolet adhesion index is less than or equal to about 20. -34- This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) 200303014 A8 B8 C8 D8 6. Application for patent scope 4 ^ 22 · If the method for manufacturing optical discs is applied for item 21 of the patent scope, The ultraviolet adhesion index is less than or equal to about 10. (Please read the precautions on the back before filling this page) 23. —An optical disc containing: at least two plastic substrates (1), which contains an adhesive tape and a data layer placed between them, where At least one of the plastic substrate (1) is a reading surface substrate and contains a coloring agent greater than or equal to about 0.01 wt% (based on the total weight of the reading surface substrate), and wherein the reading surface substrate has a greater than or A UV adhesion index equal to about 0.5. 24. The optical disc according to item 23 of the patent application, wherein the optical disc is selected from the group consisting of: DVD 5, DVD 9, DVD 10, DVD 14 and DVD 18. 25. For example, the optical disc of item 23 of the patent application range, wherein the light transmittance of the substrate through the reading surface at the laser reading wavelength is about 60% to 94% or less. 26. The optical disc 5 according to item 25 of the patent application, wherein the light transmittance is about 70% to about 92%. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 27. For example, the optical disc of item 26 of the patent application, wherein the light transmittance is about 74% to about 88%. 28. The optical disc of item 27 in the patent application range, wherein the light transmittance is about 78% to about 84%. 29. The optical disc ′ according to item 23 of the patent application scope, wherein the thickness of the reading surface substrate is about 0.4 mm to about 1 mm. 30. The optical disc according to item 23 of the patent application, wherein the ultraviolet adhesive index is less than or equal to about 70. This paper size applies to China National Standard (CNS) A4 specifications (210 × 297 mm) -35-Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 200303014 A8 B8 C8 D8 _________ VI. Patent application scope 5 1 3 1 The optical disc of item 30, wherein the ultraviolet adhesion index is less than or equal to about 60. 32. The optical disc of item M in the patent application range, wherein the ultraviolet adhesion index is less than or equal to about 50. 33. The optical disc according to item 32 of the application, wherein the ultraviolet adhesion index is less than or equal to about 40. 34. The optical disc according to item 33 of the patent application range, wherein the ultraviolet adhesion index is less than or equal to about 30. 35. The optical disc according to item 34 of the patent application scope, wherein the ultraviolet adhesion index is less than or equal to about 20. 3 6. The optical disc ′ according to item 35 of the scope of patent application, wherein the ultraviolet adhesive index is less than or equal to about 10. 37. For example, the optical disc of the scope of the patent application No. 23, wherein the plastic is selected from the group consisting of: amorphous thermoplastic, crystalline thermosetting plastic, semi-crystalline thermoplastic, semi-crystalline Crystal thermosetting plastic, and admixtures, copolymers, reaction products, and composites containing at least one of the above plastics. 38. For example, the optical disc of the 37th scope of the patent application, wherein the plastic is selected from the following Groups of composition: Polyetherimide, Polyetheretherketone, Polyimide, Polyvinyl chloride, Polyolefin, Polyester, Polyamide, Jusuo, Polyimide Polyether / imine type 'Polyether master type, polyphenylene sulfide type, polyether ketone type, polyether ether ketone type, ABS resin, polystyrene type, polybutadiene, polyacrylate type' polyacrylonitrile 'Polyacetals, polyphenylene ethers, ethylene-vinyl acetate copolymers, polyvinyl acetate, liquid crystal polymers, I, —ri IJ ΙΓ. 1-1 I ..... I-111 --- ---- IC please read the notes on the back before filling this page], 1T This paper size is applicable to China National Standard (CNS) A4 specification (210X2 97 mm) -36 · 200303014 A8 B8 C8 D8 6. Scope of patent application 6 Ethylene-tetrafluoroethylene copolymer, aromatic polyester, polyvinyl fluoride, polyvinylidene fluoride, polyvinylidene chloride, tetrafluoro Ethylene fluorocarbon copolymers, epoxy polymers, phenolic resins, alkyd resins, polyesters, polyimides, polyurethanes, polysiloxanes, polysiloxanes, bismaleimides , Cyanate esters, vinyl resins, benzocyclobutene resins, and blends, copolymers, reaction products, and composites containing at least one of the aforementioned plastics. 39. The optical disc according to item 23 of the patent scope of claim I, wherein the colorant is selected from the group consisting of anthraquinones, fluorenes, periones, and indanthrene ( indanthrones), guinacridones' xanthenes, oxazines, thioxanthenes, indigo, sulfur residues, naphthoxamines, Anthocyanins, azaanthracenes, meteones, lactones, coumarins, dibenzoxazolylthiophene (BB0T), tetracarboxylic naphthalene derivatives, monoazo and diazo pigments, triaryl Methyl methanes, amine ketones, diphenylethyl fine base derivatives, and reaction products and blends containing at least one of the above colorants. : ------ J ---- (Please read the notes on the back before filling out this page) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs Employee Cooperatives 37 This paper size applies to Chinese National Standard (CNS) A4 specifications (210X297 Public envy