WO2006116581A2 - Optical disk substrate and optical disk - Google Patents

Optical disk substrate and optical disk Download PDF

Info

Publication number
WO2006116581A2
WO2006116581A2 PCT/US2006/015980 US2006015980W WO2006116581A2 WO 2006116581 A2 WO2006116581 A2 WO 2006116581A2 US 2006015980 W US2006015980 W US 2006015980W WO 2006116581 A2 WO2006116581 A2 WO 2006116581A2
Authority
WO
WIPO (PCT)
Prior art keywords
optical disk
recording
substrate
protruding portion
layer
Prior art date
Application number
PCT/US2006/015980
Other languages
French (fr)
Other versions
WO2006116581A3 (en
Inventor
Yi-Lin Chu
Original Assignee
Princo America Corp.
Princo Corp.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from TW094113748A external-priority patent/TWI267847B/en
Priority claimed from CNB2005100739565A external-priority patent/CN100363999C/en
Application filed by Princo America Corp., Princo Corp. filed Critical Princo America Corp.
Publication of WO2006116581A2 publication Critical patent/WO2006116581A2/en
Publication of WO2006116581A3 publication Critical patent/WO2006116581A3/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0014—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form
    • G11B23/0021—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form discs
    • G11B23/0028—Details
    • G11B23/0035—Details means incorporated in the disc, e.g. hub, to enable its guiding, loading or driving
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403—Layers; Shape, structure or physical properties thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403—Layers; Shape, structure or physical properties thereof
    • G11B7/24047—Substrates

Definitions

  • the invention relates to an optical disk substrate and an optical disk, and more particularly to an optical disk substrate and an optical disk that are easy to manufacture at reduced cost.
  • FIG. IA is a top view of a conventional optical disk 1.
  • the conventional optical disk 1, which is annular as shown in FIG IA, is divided into a supporting portion 11 on the inner side of the circle and a recording portion 12 on the outer side of the circle.
  • FIG. IB illustrates the detailed structure of the conventional optical disk 1; the conventional optical disk 1 includes a substrate 14, a paint layer 15, and a compensation sheet 16.
  • the paint layer 15 includes a recording layer 151, a reflection layer 152, and a protection layer 153, which are sequentially stacked on the substrate 14 to form the recording portion 12. Then the compensation sheet 16 and the substrate 14 are bonded together to form the optical disk 1.
  • the substrate 14 has a thickness of 0.6mm and the compensation sheet 16 also has a thickness of 0.6mm, so that the supporting portion 11 of the optical disk 1 has a thickness of 1.2mm for an optical disk drive to clamp thereto.
  • the substrate 14 and the compensation sheet 16 of the conventional optical disk 1 are required to be correspondently bonded after they have been separately formed, which in turn increases the complexity and difficulty of the production and thus unqualified products are easily produced.
  • the optical disk 1 needs to be strengthened by the compensation sheet 16 so that when the optical disk 1 is revolving in the optical disk drive, the optical disk will not be distorted due to high-speed revolution; the addition of the compensation sheet 16 further increases the material cost.
  • how to effectively reduce the material cost and to easily manufacture optical disks with increased yield while maintaining the rigidity of the optical disk has always been the goal for the industry.
  • an object of the invention is to provide an optical disk substrate and an optical disk that can be manufactured easily at reduced cost with increased yield.
  • the optical disk substrate of the invention includes an annular substrate and a protruding portion.
  • the annular substrate has an inner supporting portion and an outer recording portion with a recording surface.
  • the protruding portion is overlaid on the supporting portion, wherein the protruding portion has a supporting surface that is on a different plane from the recording surface, and has a plurality of indentations on the outer periphery of the protruding portion.
  • the total thickness of the protruding portion and the supporting portion is greater than the thickness of the recording portion.
  • the optical disk of the invention includes a paint layer formed on the recording surface of the optical disk substrate for data recording.
  • the optical disk substrate and optical disk of the invention since the total thickness of the protruding portion and the supporting portion is greater than the thickness of the recording portion, the optical disk can be directly clamped by an optical disk drive. Thus the rigidity can be enhanced and the warping of the substrate can be prevented. Moreover, the indentations of the protruding portion can minimize the material cost of producing optical disk substrates and lower the internal stress of the optical disk substrate after injection molding, so that an optical disk with excellent optical characteristics can be obtained.
  • An inclined plane provided on the protruding portion allows an injection mold to be filled with the plasticized material more smoothly during the injection molding process of the optical disk substrate, which in turn decreases the output of unqualified products.
  • FIG. IA illustrates a top view of a conventional optical disk
  • FIG. IB illustrates a sectional view of a conventional optical disk
  • FIG. 2A illustrates a top view of an optical disk substrate according to a preferred embodiment of the invention
  • FIG. 2B illustrates a sectional view of an optical disk substrate according to a preferred embodiment of the invention
  • FIG. 2C illustrates a sectional view of an optical disk substrate according to another preferred embodiment of the invention
  • FIG. 3 illustrates a sectional view of an optical disk according to a preferred embodiment of the invention
  • FIG. 4 illustrates a sectional view of an optical disk according to another preferred embodiment of the invention
  • FIG. 5 A is an optical characteristic diagram showing relative double refraction index of a conventional optical disk
  • FIG. 5B is an optical characteristic diagram showing relative double refraction index of an optical disk according to a preferred embodiment of the invention
  • an optical disk substrate 2 includes an annular substrate 21 and a protruding portion 22.
  • the annular substrate 21 is provided with a supporting portion 211 on the inner side and a recording portion 212 on the outer side.
  • the recording portion 212 has a recording surface 212a, on which a paint layer, which would be described later, is formed.
  • the protruding portion 22 is overlaid on the supporting portion 211 and has a supporting surface 22a. The thickness between 0.66 mm and 1.6 mm is reached when the protruding portion 22 is laid over the supporting portion 211 of the annular substrate 21; this is the total thickness (D) of the protruding portion and the supporting portion.
  • the recording portion 212 of the annular substrate 21 has a thickness between 0.55 mm and 0.65 mm, and hence, the supporting surface 22a and the recording surface 212a are not coplanar.
  • the plane Pl, on which the supporting surface 22a is located differs from the plane P2, on which the recording surface 212a is located.
  • the two planes can be on the same side of the annular substrate 12 as shown in FIG. 2B, or they can be on different sides of the annular substrate 12 as shown in FIG. 2C.
  • the annular substrate 21 and the protruding portion 22 can be molded in one piece, for example by injection molding, or can be assembled by bonding to one another.
  • the diameter of the annular substrate 21 is between 70 mm and 90 mm with a preference of 80 mm, or between 110 mm and 130 mm with a preference of 120 mm, or a dimension other than the above-mentioned.
  • the optical disk substrate according to the embodiment of the invention further includes an inclined plane 222 extending from the plane Pl on which the supporting surface 22a is located to the plane P2 on which the recording surface 212a is located, and the inclined plane 222 is the outermost periphery of the protruding portion 22.
  • FIGs. 3 and 4 illustrate two optical disks 3 and 4, respectively, according to the preferred embodiments of the invention.
  • the optical disks 3 and 4 each includes an optical disk substrate 2 and a paint layer 35, 45, respectively.
  • the structural characteristic of the optical disk substrate 2 is as aforementioned and is not further described hereinafter, and the paint layer 35 is formed on the recording surface 212a for recording data.
  • Different optical disks with paint layers 35, 45 of different compositions are used in different applications.
  • the paint layer 35 shown in FIG. 3 is formed by stacking a recording layer 351, a reflection layer 352, and a protection layer 353 sequentially on the recording surface 212a, wherein the recording layer 351 is composed of dyes and the reflection layer 352 is composed of metal.
  • the paint layer 45 shown in FIG. 4 is formed with a first dielectric layer 451, a recording layer 452, a second dielectric layer 453, an insulation layer 454, a reflection layer 455, and a protection layer 456 sequentially stacked on the recording surface 212a, wherein the recording layer 452 is composed of alloy and its upper and lower separation layers, and the reflection layer 455 is composed of metal.
  • the optical disk 4 made thereof is a phase change optical disk.
  • the optical disks 3 and 4 can be used as DVD categories, High-Density DVD categories and other double-sided disc applications.
  • FIG. 5A is an optical characteristic diagram illustrating the relative double refraction index of an optical disk without the indentations 221
  • FIG. 5B is an optical characteristic diagram illustrating the relative double refraction index of an optical disk of the invention.
  • the average values of the relative double refraction index for the conventional optical disks with radii of 22.8 mm, 40.0 mm, and 57.3 mm are 74 nm, 10 nm, and -25 nm, respectively, while the average values of relative double refraction index for the optical disks of the invention with the same radii are -19 nm, -8 nm, and -24 nm, respectively, which are lower than that of the conventional optical disks and thereby have more desirable optical characteristics.
  • the total thickness of the protruding portion of the optical disk substrate and the supporting portion is large enough to be directly clamped by the optical disk drive, and so a compensation sheet is not needed to increase the thickness of the optical disk.
  • the rigidity of the optical disk substrate with a thicker supporting portion can prevent the annular substrate from warping, so that the optical disk substrate can be manufactured more easily and a higher yield can be obtained.
  • the indentations of the protruding portion reduce the material cost of manufacturing the optical disk substrate while maintaining the rigidity of the optical disk substrate, and the internal stress of the optical disk substrate is lowered; hence, the optical disk substrate has more desirable optical characteristics.
  • the inclined plane on the outer periphery of the protruding portion allows the mold to be filled with the plasticized material more smoothly during the injection molding process, which reduces the output of unqualified products, and in turn lowers the production cost.
  • This invention provides an optical disk substrate and an optical disk, which can be manufactured easily at reduced cost with increased yield.
  • the optical disk requires no compensation sheet for increasing its strength and the optical disk substrate has more desirable optical characteristics.

Abstract

An optical disk substrate includes an annular substrate and a protruding portion. The annular substrate has an inner supporting portion and an outer recording portion having a recording surface. The protruding portion overlaying on the supporting portion has a plurality of indentations on its outer periphery, wherein the total thickness of the protruding portion and the supporting portion is greater than the thickness of the recording portion. An optical disk, wherein a paint layer for recording data is coated on the recording surface of the disk substrate, is also disclosed.

Description

OPTICAL DISK SUBSTRATE AND OPTICAL DISK
TECHNICAL FIELD
[0001] The invention relates to an optical disk substrate and an optical disk, and more particularly to an optical disk substrate and an optical disk that are easy to manufacture at reduced cost.
BACKGROUND ART
[0002] An optical disk can store data with different formats, such as image, computer digital image, and text; therefore, an optical disk is the most convenient storage medium among the new generation optical storage media. In addition, an optical disk can be applied in many fields, including library archives, data backup, electronic publication, image data storage, and personal medical record management. [0003] Please refer to FIG. IA, which is a top view of a conventional optical disk 1. The conventional optical disk 1, which is annular as shown in FIG IA, is divided into a supporting portion 11 on the inner side of the circle and a recording portion 12 on the outer side of the circle. FIG. IB illustrates the detailed structure of the conventional optical disk 1; the conventional optical disk 1 includes a substrate 14, a paint layer 15, and a compensation sheet 16. The paint layer 15 includes a recording layer 151, a reflection layer 152, and a protection layer 153, which are sequentially stacked on the substrate 14 to form the recording portion 12. Then the compensation sheet 16 and the substrate 14 are bonded together to form the optical disk 1. The substrate 14 has a thickness of 0.6mm and the compensation sheet 16 also has a thickness of 0.6mm, so that the supporting portion 11 of the optical disk 1 has a thickness of 1.2mm for an optical disk drive to clamp thereto. [0004] However, there are problems remaining in producing conventional optical disks. The substrate 14 and the compensation sheet 16 of the conventional optical disk 1 are required to be correspondently bonded after they have been separately formed, which in turn increases the complexity and difficulty of the production and thus unqualified products are easily produced. Thereby, the production cost cannot be effectively reduced. Also, the optical disk 1 needs to be strengthened by the compensation sheet 16 so that when the optical disk 1 is revolving in the optical disk drive, the optical disk will not be distorted due to high-speed revolution; the addition of the compensation sheet 16 further increases the material cost. Thus, how to effectively reduce the material cost and to easily manufacture optical disks with increased yield while maintaining the rigidity of the optical disk has always been the goal for the industry.
DISCLOSURE OF INVENTION
[0005] In view of the aforementioned problems, an object of the invention is to provide an optical disk substrate and an optical disk that can be manufactured easily at reduced cost with increased yield.
[0006] The optical disk substrate of the invention includes an annular substrate and a protruding portion. The annular substrate has an inner supporting portion and an outer recording portion with a recording surface. The protruding portion is overlaid on the supporting portion, wherein the protruding portion has a supporting surface that is on a different plane from the recording surface, and has a plurality of indentations on the outer periphery of the protruding portion. The total thickness of the protruding portion and the supporting portion is greater than the thickness of the recording portion. The optical disk of the invention includes a paint layer formed on the recording surface of the optical disk substrate for data recording. [0007] According to the optical disk substrate and optical disk of the invention, since the total thickness of the protruding portion and the supporting portion is greater than the thickness of the recording portion, the optical disk can be directly clamped by an optical disk drive. Thus the rigidity can be enhanced and the warping of the substrate can be prevented. Moreover, the indentations of the protruding portion can minimize the material cost of producing optical disk substrates and lower the internal stress of the optical disk substrate after injection molding, so that an optical disk with excellent optical characteristics can be obtained. An inclined plane provided on the protruding portion allows an injection mold to be filled with the plasticized material more smoothly during the injection molding process of the optical disk substrate, which in turn decreases the output of unqualified products.
BRIEF DESCRIPTION OF DRAWINGS
[0008] FIG. IA illustrates a top view of a conventional optical disk [0009] FIG. IB illustrates a sectional view of a conventional optical disk [0010] FIG. 2A illustrates a top view of an optical disk substrate according to a preferred embodiment of the invention
[0011] FIG. 2B illustrates a sectional view of an optical disk substrate according to a preferred embodiment of the invention
[0012] FIG. 2C illustrates a sectional view of an optical disk substrate according to another preferred embodiment of the invention [0013] FIG. 3 illustrates a sectional view of an optical disk according to a preferred embodiment of the invention
[0014] FIG. 4 illustrates a sectional view of an optical disk according to another preferred embodiment of the invention [0015] FIG. 5 A is an optical characteristic diagram showing relative double refraction index of a conventional optical disk [0016] FIG. 5B is an optical characteristic diagram showing relative double refraction index of an optical disk according to a preferred embodiment of the invention
BEST MODE FOR CARRYING OUT THE INVENTION [0017] The optical disk substrate and optical disk according to a preferred embodiment of the invention will be described below with reference to the drawings, wherein the like reference numerals denote the like components.
[0018] As shown in FIGs. 2A and 2B, an optical disk substrate 2 according to a preferred embodiment of the invention includes an annular substrate 21 and a protruding portion 22. The annular substrate 21 is provided with a supporting portion 211 on the inner side and a recording portion 212 on the outer side. The recording portion 212 has a recording surface 212a, on which a paint layer, which would be described later, is formed. The protruding portion 22 is overlaid on the supporting portion 211 and has a supporting surface 22a. The thickness between 0.66 mm and 1.6 mm is reached when the protruding portion 22 is laid over the supporting portion 211 of the annular substrate 21; this is the total thickness (D) of the protruding portion and the supporting portion. Such thickness allows the optical disk drive to clamp onto the supporting surface 22a for read/write operations when the optical disk is placed into the optical disk drive. On the other hand, the recording portion 212 of the annular substrate 21 has a thickness between 0.55 mm and 0.65 mm, and hence, the supporting surface 22a and the recording surface 212a are not coplanar. In other words, the plane Pl, on which the supporting surface 22a is located, differs from the plane P2, on which the recording surface 212a is located. The two planes can be on the same side of the annular substrate 12 as shown in FIG. 2B, or they can be on different sides of the annular substrate 12 as shown in FIG. 2C. In addition, a plurality of indentations 221, which are formed around the rim of the protruding portion in such a way that the protruding portion 22 could be a gear wheel shape or a petal like shape, are provided on the outer periphery of the protruding portion 22. It is to be noted that the annular substrate 21 and the protruding portion 22 can be molded in one piece, for example by injection molding, or can be assembled by bonding to one another. The diameter of the annular substrate 21 is between 70 mm and 90 mm with a preference of 80 mm, or between 110 mm and 130 mm with a preference of 120 mm, or a dimension other than the above-mentioned.
[0019] The optical disk substrate according to the embodiment of the invention further includes an inclined plane 222 extending from the plane Pl on which the supporting surface 22a is located to the plane P2 on which the recording surface 212a is located, and the inclined plane 222 is the outermost periphery of the protruding portion 22.
[0020] FIGs. 3 and 4 illustrate two optical disks 3 and 4, respectively, according to the preferred embodiments of the invention. The optical disks 3 and 4 each includes an optical disk substrate 2 and a paint layer 35, 45, respectively. The structural characteristic of the optical disk substrate 2 is as aforementioned and is not further described hereinafter, and the paint layer 35 is formed on the recording surface 212a for recording data. Different optical disks with paint layers 35, 45 of different compositions are used in different applications. For example, the paint layer 35 shown in FIG. 3 is formed by stacking a recording layer 351, a reflection layer 352, and a protection layer 353 sequentially on the recording surface 212a, wherein the recording layer 351 is composed of dyes and the reflection layer 352 is composed of metal. The paint layer 45 shown in FIG. 4 is formed with a first dielectric layer 451, a recording layer 452, a second dielectric layer 453, an insulation layer 454, a reflection layer 455, and a protection layer 456 sequentially stacked on the recording surface 212a, wherein the recording layer 452 is composed of alloy and its upper and lower separation layers, and the reflection layer 455 is composed of metal. The optical disk 4 made thereof is a phase change optical disk. The optical disks 3 and 4 can be used as DVD categories, High-Density DVD categories and other double-sided disc applications.
[0021] Besides fulfilling the requirement for structural rigidity and warping, the optical disk substrate and the optical disk of the invention also have better optical characteristics. Referring to FIGs. 5A and 5B, FIG. 5A is an optical characteristic diagram illustrating the relative double refraction index of an optical disk without the indentations 221, and FIG. 5B is an optical characteristic diagram illustrating the relative double refraction index of an optical disk of the invention. The average values of the relative double refraction index for the conventional optical disks with radii of 22.8 mm, 40.0 mm, and 57.3 mm are 74 nm, 10 nm, and -25 nm, respectively, while the average values of relative double refraction index for the optical disks of the invention with the same radii are -19 nm, -8 nm, and -24 nm, respectively, which are lower than that of the conventional optical disks and thereby have more desirable optical characteristics.
[0022] According to the optical disk substrate and the optical disk of the invention, the total thickness of the protruding portion of the optical disk substrate and the supporting portion is large enough to be directly clamped by the optical disk drive, and so a compensation sheet is not needed to increase the thickness of the optical disk. Also, the rigidity of the optical disk substrate with a thicker supporting portion can prevent the annular substrate from warping, so that the optical disk substrate can be manufactured more easily and a higher yield can be obtained. The indentations of the protruding portion reduce the material cost of manufacturing the optical disk substrate while maintaining the rigidity of the optical disk substrate, and the internal stress of the optical disk substrate is lowered; hence, the optical disk substrate has more desirable optical characteristics. Moreover, the inclined plane on the outer periphery of the protruding portion allows the mold to be filled with the plasticized material more smoothly during the injection molding process, which reduces the output of unqualified products, and in turn lowers the production cost. [0023] While the invention has been described by way of examples and in terms of the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. In other words, it is intended to include equivalent modifications and changes of the above embodiments without departing from the spirit and scope of the invention as would be apparent to those skilled in the art. For example, though the preferred embodiment of the optical disk of the invention does not bond with any compensation sheet to increase the thickness and strength of the optical disk, people skilled in the art could bond compensation sheets thereto according to special requirements. Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such equivalent modifications and changes.
INDUSTRIAL APPLICABILITY
[0024] This invention provides an optical disk substrate and an optical disk, which can be manufactured easily at reduced cost with increased yield. The optical disk requires no compensation sheet for increasing its strength and the optical disk substrate has more desirable optical characteristics.

Claims

WHAT IS CLAIMED IS:
1. An optical disk substrate, comprising: an annular substrate, having a supporting portion and a recording portion surrounding the supporting portion, the recording portion having a recording surface; and a protruding portion overlaid on the supporting portion, the protruding portion having a supporting surface which is on a different plane from the recording surface and having a plurality of indentations on its outer periphery, wherein the total thickness of the protruding portion and the supporting portion is greater than the thickness of the recording portion.
2. The optical disk substrate as described in claim 1, wherein the outermost periphery of the protruding portion is inclined outwards from the plane on which the supporting surface is located to the plane on which the recording surface is located.
3. The optical disk substrate as described in claim 1, wherein the total thickness of the protruding portion and the supporting portion is between 0.66 mm and 1.6 mm.
4. The optical disk substrate as described in claim 1, wherein the thickness of the recording portion is between 0.55 mm and 0.65 mm.
5. The optical disk substrate as described in claim 1, wherein the diameter of the annular substrate is between 70 mm and 90 mm.
6. The optical disk substrate as described in claim 1, wherein the diameter of the annular substrate is between 110 mm and 130 mm.
7. The optical disk substrate as described in claim 1, wherein the supporting surface and the recording surface are on the same side of the annular substrate.
8. The optical disk substrate as described in claim 1, wherein the supporting surface and the recording surface are on different sides of the annular substrate.
9. The optical disk substrate as described in claim 1, wherein the annular substrate and the protruding portion are molded in one piece.
10. The optical disk substrate as described in claim 1, wherein the annular substrate and the protruding portion are assembled.
11. An optical disk, comprising: an optical disk substrate, which comprises: an annular substrate, having a supporting portion and a recording portion surrounding the supporting portion, the recording portion having a recording surface; and a protruding portion overlaid on the supporting portion, the protruding portion having a supporting surface which is on a plane different from the recording surface and having a plurality of indentations on its outer periphery, wherein the total thickness of the protruding portion and the supporting portion is greater than the thickness of the recording portion; and a paint layer formed on the recording surface for recording data.
12. The optical disk as described in claim 11, wherein the outermost periphery of the protruding portion is inclined outwards from the plane on which the supporting surface is located to the plane on which the recording surface is located.
13. The optical disk as described in claim 11, further comprising: a compensation sheet overlaid on the paint layer.
14. The optical disk as described in claim 11, wherein the total thickness of the protruding portion and the supporting portion is between 0.66 mm and 1.6 mm.
15. The optical disk as described in claim 11, wherein the thickness of the recording portion is between 0.55 mm and 0.65 mm.
16. The optical disk as described in claim 11, wherein the diameter of the annular substrate is between 70 mm and 90 mm.
17. The optical disk as described in claim 11, wherein the diameter of the annular substrate is between 110 mm and 130 mm.
18. The optical disk as described in claim 11, wherein the supporting surface and the recording surface are on the same side of the annular substrate.
19. The optical disk as described in claim 11, wherein the supporting surface and the recording surface are on different sides of the annular substrate.
20. The optical disk as described in claim 11, wherein the annular substrate and the protruding portion are molded in one piece.
21. The optical disk as described in, claim 11, wherein the annular substrate and the protruding portion are assembled.
22. The optical disk as described in claim 11, wherein the paint layer comprises: at least one recording layer located on the recording surface; a reflection layer located on the recording layer; and a protection layer located on the reflection layer.
23. The optical disk as described in claim 22, wherein the recording layer is composed of dyes and the reflection layer is composed of metal.
24. The optical disk as described in claim 11 , wherein the paint layer comprises: a first dielectric layer located on the recording surface; a recording layer located on the first dielectric layer; a second dielectric layer located on the recording layer; an insulation layer located on the second dielectric layer; a reflection layer located on the insulation layer; and a protection layer located on the reflection layer.
25. The optical disk as described in claim 24, wherein:
the recording layer is composed of alloy, an upper separation layer of the alloy, and a lower separation layer of the alloy; and
the reflection layer is composed of metal.
PCT/US2006/015980 2005-04-28 2006-04-26 Optical disk substrate and optical disk WO2006116581A2 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
TW094113748 2005-04-28
TW094113748A TWI267847B (en) 2005-04-28 2005-04-28 Optical disc substrate and optical disc
CN200510073956.5 2005-05-19
CNB2005100739565A CN100363999C (en) 2005-05-19 2005-05-19 Optical disk substrate and optical disk
US11/162,510 US20060245340A1 (en) 2005-04-28 2005-09-13 Optical disk substrate and optical disk
US11/162,510 2005-09-13

Publications (2)

Publication Number Publication Date
WO2006116581A2 true WO2006116581A2 (en) 2006-11-02
WO2006116581A3 WO2006116581A3 (en) 2007-11-29

Family

ID=37215495

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/015980 WO2006116581A2 (en) 2005-04-28 2006-04-26 Optical disk substrate and optical disk

Country Status (1)

Country Link
WO (1) WO2006116581A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112008002112T5 (en) 2007-08-21 2010-07-01 Princo America Corp., Fremont Optical disc and method of making the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4633458A (en) * 1983-06-20 1986-12-30 Polygram Gmbh Disc-shaped, optically-readable information carrier having a protective edge and/or center part
US5448547A (en) * 1987-12-01 1995-09-05 Mitsui Petrochemical Industries, Ltd. Information recording discs
US5500325A (en) * 1993-10-21 1996-03-19 Eastman Kodak Company Dye mixtures for optical recording layers
US5999513A (en) * 1997-03-25 1999-12-07 Sony Corporation Optical disc substrate having relatively thicker central supporting portion and relatively thinner recording portion
US6159571A (en) * 1997-08-14 2000-12-12 Lg Electronics Inc. Phase-change optical disc

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4633458A (en) * 1983-06-20 1986-12-30 Polygram Gmbh Disc-shaped, optically-readable information carrier having a protective edge and/or center part
US5448547A (en) * 1987-12-01 1995-09-05 Mitsui Petrochemical Industries, Ltd. Information recording discs
US5500325A (en) * 1993-10-21 1996-03-19 Eastman Kodak Company Dye mixtures for optical recording layers
US5999513A (en) * 1997-03-25 1999-12-07 Sony Corporation Optical disc substrate having relatively thicker central supporting portion and relatively thinner recording portion
US6159571A (en) * 1997-08-14 2000-12-12 Lg Electronics Inc. Phase-change optical disc

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112008002112T5 (en) 2007-08-21 2010-07-01 Princo America Corp., Fremont Optical disc and method of making the same

Also Published As

Publication number Publication date
WO2006116581A3 (en) 2007-11-29

Similar Documents

Publication Publication Date Title
US6524418B2 (en) Method of production of multilayer optical recording medium
US20060245340A1 (en) Optical disk substrate and optical disk
WO2006116581A2 (en) Optical disk substrate and optical disk
US7879422B2 (en) Optical disc and method for fabricating the same
US6924020B2 (en) Optical disk substrate, optical disk, and method of forming the same
WO2007056074A2 (en) Optical disc and method for fabricating the same
EP1758108B1 (en) Optical disc substrate and optical disc
CN100363999C (en) Optical disk substrate and optical disk
US20030185143A1 (en) Multi-layer rewriteable information storage medium
CN100449623C (en) Optical disk base board, opticaldisk and its manufacturing method
EP1923872A1 (en) Eco disc
US8563111B2 (en) Digital information media having adhesion promotion layer on a substrate
CN2426191Y (en) Composite intelligent CD card
KR101106596B1 (en) Multi Layer Disc
WO2004095433A2 (en) Optical disk substrate, optical disk, and method of forming the same
CN2447900Y (en) Manufacturing mould for super digital universal disk
US20060019054A1 (en) Optical information storage medium
US20050041570A1 (en) Optical disc construction
TW200530743A (en) Optical disc and method of forming the same
CN2434765Y (en) Super-grade digital general disc
JP5705844B2 (en) Data disk and data disk manufacturing method and system
US20060248552A1 (en) Optical information storage medium
JP2005267721A (en) Information recording medium and its manufacturing method
MX2008005580A (en) Optical disc and method for fabricating the same
JP2006065955A (en) Optical disk

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase in:

Ref country code: DE

NENP Non-entry into the national phase in:

Ref country code: RU

122 Ep: pct application non-entry in european phase

Ref document number: 06751618

Country of ref document: EP

Kind code of ref document: A2