WO2001073777A1 - Disque supernumerique universel, son procede de fabrication et sa matrice - Google Patents

Disque supernumerique universel, son procede de fabrication et sa matrice Download PDF

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Publication number
WO2001073777A1
WO2001073777A1 PCT/CN2000/000062 CN0000062W WO0173777A1 WO 2001073777 A1 WO2001073777 A1 WO 2001073777A1 CN 0000062 W CN0000062 W CN 0000062W WO 0173777 A1 WO0173777 A1 WO 0173777A1
Authority
WO
WIPO (PCT)
Prior art keywords
substrate
area
data recording
digital versatile
recording area
Prior art date
Application number
PCT/CN2000/000062
Other languages
English (en)
Chinese (zh)
Inventor
Faiman Xiu
Original Assignee
Goldsense Laser Av Production Limited
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
Application filed by Goldsense Laser Av Production Limited filed Critical Goldsense Laser Av Production Limited
Priority to AU2000236534A priority Critical patent/AU2000236534A1/en
Priority to PCT/CN2000/000062 priority patent/WO2001073777A1/fr
Priority to HK00103221A priority patent/HK1028704A2/xx
Priority to HK00103223A priority patent/HK1028706A2/xx
Publication of WO2001073777A1 publication Critical patent/WO2001073777A1/fr

Links

Classifications

    • 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
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • G11B7/263—Preparing and using a stamper, e.g. pressing or injection molding substrates
    • 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

Definitions

  • the present invention relates to an optical disc recording medium, a manufacturing method and a manufacturing mold thereof, and particularly to a super digital versatile disc compatible with a digital versatile disc, a manufacturing method thereof, and a manufacturing mold. Background technique
  • the optical disc is mainly used for storing sound, video and data. Generally, it has a circular size and an outer diameter of 120 mm or 80 mm. There are two main types of optical discs, namely CD discs (small discs) and DVD discs (digital versatile discs).
  • CDs can be divided into CD-DA, CD-I. CD-Photo. CD-G, CD-ROM. CD-ROM XA, VCD, CD-R, CD-RW and other formats .
  • DVD can be divided into DVD-Video (Video DVD), DVD-Audio (Audio DVD). DVD-ROM, DVD-R, DVD-RW. DVD-RAM and other formats.
  • DVDs look very similar to regular CDs, with a diameter of 120mm and a thickness of 1.2mm.
  • the information storage capacity of a DVD can reach seven to thirteen times that of a CD. Taking a single-sided single-layer DVD as an example, its data storage capacity reaches 4.7GB, which is more than seven times that of a CD.
  • a single-layer DVD can store at least two hours and fifteen minutes of video images, and has high-definition image quality (horizontal resolution up to 500 lines) and high-fidelity music and interactive multimedia. performance.
  • the DVD also comes with Dolby Digital (AC-3) surround sound and eight independent channels.
  • AC-3 Dolby Digital
  • single-sided single-layer DVDs When applied to audio products, single-sided single-layer DVDs can store six to seven CD players' music content, while providing up to 96 kHz sampling frequency and 24-bit analog-to-digital conversion capability. Because DVD has a higher storage capacity, when used to store game programs, game programs can have more unexpected designs, have a stronger sense of reality, and have more autonomy. Naturally, the game program is more entertaining.
  • the read-only storage mode of DVD can completely replace the existing CD. Since the capacity of a single-sided single-layer DVD is seven times that of a CD-ROM, only one DVD-ROM can store the contents of a reference book, including images, sounds, and video clips.
  • DVD Any kind of data information can be stored on DVD, which means that DVD has broad development prospects in multimedia applications.
  • cable and wireless television can use DVDs for more effective programming.
  • Video on Demand (VOD) is an ideal DVD application because DVD images do not need to be rewinded and can be searched automatically.
  • Card-to-OK DVD is another application and has a huge market.
  • DVDs can be used in the publishing industry.
  • Other possible applications include video and audio recording to replace tapes in various systems.
  • the pits (or pits, pits) of the DVD are designed to be only half of the CD pits, that is, 0.4 micrometers. It is also half the CD track separation distance, which is 0.74 microns.
  • DVDs use thinner polycarbonate (PC) substrates than CDs.
  • PC polycarbonate
  • Conventional DVP players require that the DVD film being played must have a minimum thickness of about 1.2 mm.
  • a first object of the present invention is to provide a digital universal disc with a new structure. It is referred to herein as the Super Digital Versatile Disc (SDVD).
  • SDVD Super Digital Versatile Disc
  • Super DVD has a data format compatible with conventional DVDs, so it can be played in conventional DVD players, but its manufacturing process is relatively simple and raw materials are saved.
  • a second object of the present invention is to provide a method for manufacturing the above-mentioned super digital versatile disc.
  • a third object of the present invention is to provide a mold for manufacturing the above-mentioned super digital versatile disc.
  • the present invention provides a digital universal disk, which includes a center hole, a pressure plate area and a data recording area concentric with the center hole, and is characterized by:
  • the platen area and the data recording area are formed on the same single substrate.
  • the thickness of the substrate at the platen area is greater than the thickness of the substrate at the data recording area.
  • the present invention provides a method for manufacturing a digital versatile disc, which is characterized by including the following steps:
  • a substrate is injection-molded, and a platen area around the central hole and a data recording area around the platen are formed on the substrate, wherein the thickness of the substrate at the platen area is greater than the thickness of the substrate at the data recording area.
  • the present invention provides a mold for manufacturing a digital versatile disc, including:
  • a fluid injection hole provided on the end surface of the first die base, through which fluid can be injected into the substrate molding space;
  • the second mold base includes:
  • a central hub whose end surface is exposed to the end surface of the second mold base, and then to the substrate molding space, and faces the fluid injection hole, and
  • a stamped part sleeved in the central hub can be moved relative to the end face of the second die seat to enter or leave the substrate forming space;
  • the mold is characterized by:
  • the end face of the central hub is recessed for a first predetermined distance from the end of the second die seat toward the inside of the second die seat.
  • the super DVD according to the present invention is compatible with a conventional DVD, and can be normally played in a conventional DVD player, but saves about half of the raw material as compared with a conventional DVD.
  • FIG. 1 is a top view of a first embodiment of a super DVD of the present invention
  • FIG. 2 is a cross-sectional view of the super DVD shown in FIG. 1;
  • FIG. 3 is a top view of a second embodiment of a super DVD of the present invention
  • FIG. 4 is a cross-sectional view of the super DVD shown in FIG. 3;
  • Fig. 5 is a schematic diagram of a super DVD manufacturing mold of the present invention. Best Mode of the Invention
  • FIG. 1 is a top view of a first embodiment of a super DVD of the present invention, which is the same as that of a conventional DVD.
  • Reference number 1 is the center hole.
  • Reference numeral 2 is a platen. When a Super DVD is loaded into a conventional DVD player, the corresponding platen (not shown) in the player will fix the Super DVD at the platen 2, so that the Super DVD is in the motor. Driven by (not shown), the center hole 1 is used as the axis to rotate rapidly.
  • Reference numeral 3 is a data recording area, and is used to store sound, video, and data according to different uses and according to a corresponding recording format.
  • the recording format of the data recording area 3 can conform to any specifications of the DVD recording format in the prior art, thereby making the Super DVD compatible with the conventional DVD so that it can be played normally in a conventional DVD player.
  • the recording format of the data recording area 3 in the Super DVD can also conform to any other specifications of the recording format of the disc in question that may appear in the future.
  • the different recording formats adopted by the data recording area 3 do not constitute a limitation on the present invention.
  • the diameter of the center hole 1 is generally 15 mm
  • the outer diameter of the platen area 2 is generally 33.5 mm
  • the outer diameter of the data recording area 3 is generally 48 mm to 120 mm.
  • the outer diameter of the data recording area 3 may be 80 mm or 120 mm, so that it can be played in a conventional DVD player.
  • the various sizes given here are just to give Super DVDs a form factor similar to conventional DVDs for playback in conventional DVD players. These dimensions do not constitute a limitation on the actual size of the center hole 1, platen area 2 and data recording area 3.
  • FIG. 2 is a cross-sectional view of the super DVD shown in FIG. 1.
  • FIG. 2 the embossing area 2 and the data recording area 3 of the super DVD are formed on the same single-chip substrate, as shown by the diagonal lines in the figure.
  • the material constituting the substrate may be any suitable material in the prior art, for example, it may be polycarbonate (PC) used for manufacturing a conventional CD or DVD.
  • PC polycarbonate
  • the thickness of the platen area 2 is in the range of 0.6 mm to 1.5 mm, and the thickness of the data recording area 3 is approximately 0.6 mm.
  • Various specifications related to recording data and the working method of the optical head are well known to those skilled in the art and will not be described in detail.
  • the above-mentioned novel structure can be used in various DVDs.
  • the surface of the substrate used as the data recording area 3 may be coated with a layer of a photosensitive material, such as a dye layer, and then the area where the data is recorded is irradiated with ultraviolet light to harden the dye. .
  • a metal layer is plated on the photosensitive material layer to reflect the laser beam incident on the photosensitive material layer through the substrate.
  • a DVD-R with a novel structure that is, a Super DVD-R (SDVD-R) can be produced.
  • a multi-target metal plasma sputtering can be used to form a substrate on the surface of the substrate used as the data recording area 3.
  • a composite material layer including a plurality of thin layers of different metal materials is used as a photosensitive material layer.
  • a DVD-RW with a novel structure that is, a Super DVD-RW (SDVD-RW) can be produced.
  • the super DVD shown in Figs. 1 and 2 has a circular shape, which is the most general case. According to different usage purposes and needs, the super DVD of the present invention can adopt other different shapes, such as rectangle, square, oval, heart, triangle, etc., or any other irregular shape.
  • This super DVD can be used for various purposes, such as DVD business cards, DVD security cards, DVD calendars, DVD promotional materials, DVD greeting cards, DVD product catalogs, and so on.
  • Fig. 3 is a top view of a second embodiment of a super DVD of the present invention, showing a super DVD having a rectangular shape.
  • Reference numeral 1 is a central hole
  • reference numeral 2 is a pressure plate area
  • reference numeral 3 is a data recording area. They are the same as the corresponding components in FIG. 1 and FIG. 2 and will not be described again. It differs from FIG. 1 only in that reference numeral 4 is an external area.
  • Various patterns or characters can be produced on the data recording area 3 and the outer area 4 shown in each figure (in the present invention, characters are treated as patterns).
  • the patterns and figures made on the data recording area 3 or the outer area 4 can be used for decoration or explanation purposes.
  • a plurality of contents such as the name, title, job title, work unit, telephone, and company profile of the business card holder can be made on the data recording area 3 and / or the external area 4.
  • the pattern can be made on the outer area 4 by any method available in the prior art, such as printing, engraving, etc.
  • Making a pattern on the data recording area 3 requires a novel method provided by the present invention. As described above, a large number of pits representing the data are suppressed in the data recording area 3, and a table is formed between adjacent pits. Therefore, a part of the pits and / or mesas can be selected from a large number of pits and mesas according to the pattern made, and without affecting the represented data, their shapes are slightly changed to make them have special shapes. These special shaped pits and / or tables are combined macroscopically to form a pattern.
  • the pattern can be made on the die together with the data in advance, and then the die is pressed onto the substrate during the injection molding of the substrate. It is also possible to record the pits and / or tables that need to be reshaped one by one after the data is pressed onto the substrate by conventional methods.
  • the distance between any point on the outer edge of the outer area 4 and the center of the center hole 1 must be less than or equal to 60 mm.
  • the outer edge of the outer region 4 may constitute a regular shape (eg, a circle, a rectangle, a square, an oval, a triangle, etc.) or any irregular shape.
  • the outer diameter of the data recording area 3 is generally smaller than the outer diameter of the data recording area 3 in the super DVD shown in FIG. 1, but the minimum is 48 mm.
  • FIG. 4 is a cross-sectional view of the super DVD shown in FIG. 3.
  • the press disk area 1, the data recording area 3, and the external area 4 of the super DVD are formed on the same single-chip substrate, as shown by oblique lines in the figure.
  • the external area 4 is added.
  • the outer area 4 may have the same thickness as the data recording area 3.
  • the fixing device may be at least two protrusions formed on the substrate, or at least two rubber edges adhered to the substrate, or a ring concentric with the center hole 1.
  • the fixing device 5 can The lower surface of the substrate located at the data recording area 3, or the lower surface of the substrate located at the outer area 4, or the lower surface of the substrate located at the boundary between the data recording area 3 and the outer area 4.
  • the relative position of the fixing device 5 with the data recording area 3 and the external area 4 does not constitute a limitation on the present invention.
  • the most basic method involves such a step: injection molding a substrate, forming a platen area 2 around the center hole 1 and a data recording area 3 around the platen area 2 on the substrate, wherein the thickness of the substrate at the platen area 2 Greater than the thickness of the substrate at the data recording area 3.
  • the substrate thickness at the platen area 2 is greater than 0.6 mm and less than or equal to 1.5 mm, so that the substrate thickness at the data recording area 3 is 3 Approximately 0.6 mm.
  • the above method forms the outer diameter of the data recording area 3 in the range of 48 mm to 120 mm.
  • the above methods can be used to make various DVDs, such as read-only DVDs, DVD-R, DVD-RW, DVD-RAM, and so on.
  • a metal layer is plated on the plurality of pits and mesa for reflecting the laser beam incident on the plurality of pits and mesa through the substrate.
  • a layer of a photosensitive material such as a dye layer, is applied on the data recording area 3. Then, the portion representing the data is irradiated with ultraviolet light to harden the irradiated portion. Finally, a metal layer is plated on the dye layer for reflecting through the substrate A laser beam incident on the dye layer. This method is used to make Super DVD-R.
  • a multi-target metal plasma sputtering is performed on the data recording area 3 to form a composite material layer including a plurality of thin layers of different metal materials.
  • the part of the composite material layer irradiated with the laser beam will undergo a phase change, which will change the light transmission characteristics.
  • This method is used to make Super DVD-RW.
  • the external area 4 may be formed outside the data recording area 3.
  • the platen area 2, the data recording area 3, and the external area 4 may be formed on the same single-chip substrate.
  • the outer area 4 In order to be able to play a super DVD produced as above in a conventional DVD player, the outer area 4 must be formed such that the distance between any point on the outer edge thereof and the center of the center hole 1 is less than or equal to 60 mm.
  • the outer edges of the formed outer region 4 may form a circle, a square, a rectangle, etc., or form an irregular figure.
  • the fixing device is at least two protrusions, two rubber edges or a ring concentric with the center hole 1.
  • Fig. 5 is a schematic view of a mold used when manufacturing a super DVD of the present invention.
  • the mold includes: a first mold base 501 and a second mold base 502 that can move toward each other.
  • the first mold base end surface and the second mold base end surface face each other, and a substrate forming space 508 is formed between the first mold base end surface and the second mold base end surface.
  • a fluid injection hole 503 is formed on the end surface of the first die base.
  • a fluid for forming a substrate may be injected into the substrate molding space 508 from the inside of the first mold base 501 through a fluid injection hole 503.
  • a fluid may be, for example, a melted polycarbonate.
  • the second mold base 502 includes:
  • a central hub 504 whose end surface is exposed to the end surface of the second mold base, and further exposed to the substrate molding space 508, and faces the fluid injection hole 503; and A stamped part 505 sleeved in the central hub 504 can be moved relative to the end surface of the second die seat so as to enter or leave the substrate forming space 508.
  • the function of the stamping part 505 is that after the super DVD is injection-molded in the substrate molding space 508, it rapidly impacts on the end surface of the second mold base, thereby impacting the super DVD disc adsorbed on the end surface of the second mold base with a diameter of 15 mm center hole.
  • the first mold base 501 can be fixed, and the second mold base can be moved closer to or away from the first mold base as required.
  • the end surface of the central hub 504 is recessed from the second die base end toward the inside of the second die base 502 for a first predetermined distance.
  • a die 507 with a central hole (its diameter is generally about 33.5 mm) is vacuum-adsorbed on the end face of the second die base.
  • the central hole of the die 507 exposes the end face of the central hub 504 to the base.
  • a limiting device 506 may be provided on the first mold base 501 for moving the second mold base 502 close to the first mold base 501 to restrict the movement of the second mold base 502 so as to be at the end surface of the first mold base.
  • a second predetermined distance is maintained from the die 507. The second predetermined distance is about 0.6 mm. The sum of the first predetermined distance and the thickness of the die 507 is in the range of 0 mm to 0.9 mm.
  • the mold shown in Fig. 5 is used as such.
  • the die piece 507 is vacuum-sucked onto the end face of the second die holder, so that the center hole of the die piece 507 exactly matches the end face of the central hub.
  • the second mold base 502 moves toward the first mold base 501 until it comes into contact with the limiting device 506.
  • the molten polycarbonate is injected into the substrate molding space 508 from the fluid injection hole 503.
  • the formed substrate is cooled by a water cooling method.
  • the second mold base 502 leaves the first mold base 501.
  • the molded substrate 507 is adhered to the molded substrate.
  • the impact member 505 rapidly impacts outside the end face of the second die seat, thereby striking the center hole on the substrate.
  • the robot removes the substrate from the second mold base for subsequent processing.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne un disque numérique universel perforé en son centre (1) présentant une zone de pression (2) et une zone d'enregistrement de données (3) qui sont concentriques. La zone de pression (2) et la zone d'enregistrement de données (3) sont réalisées sur le même substrat à simple couche, l'épaisseur du substrat de la zone de pression (2) étant supérieure à l'épaisseur du substrat de la zone d'enregistrement de données (3).
PCT/CN2000/000062 2000-03-27 2000-03-27 Disque supernumerique universel, son procede de fabrication et sa matrice WO2001073777A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU2000236534A AU2000236534A1 (en) 2000-03-27 2000-03-27 A super digital versatile disk and its manufacturing method and die
PCT/CN2000/000062 WO2001073777A1 (fr) 2000-03-27 2000-03-27 Disque supernumerique universel, son procede de fabrication et sa matrice
HK00103221A HK1028704A2 (en) 2000-03-27 2000-05-30 Manufacturing method for super dvd
HK00103223A HK1028706A2 (en) 2000-03-27 2000-05-30 Super dvd

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2000/000062 WO2001073777A1 (fr) 2000-03-27 2000-03-27 Disque supernumerique universel, son procede de fabrication et sa matrice

Publications (1)

Publication Number Publication Date
WO2001073777A1 true WO2001073777A1 (fr) 2001-10-04

Family

ID=4574640

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2000/000062 WO2001073777A1 (fr) 2000-03-27 2000-03-27 Disque supernumerique universel, son procede de fabrication et sa matrice

Country Status (3)

Country Link
AU (1) AU2000236534A1 (fr)
HK (1) HK1028704A2 (fr)
WO (1) WO2001073777A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0821353A2 (fr) * 1996-07-23 1998-01-28 Mitsubishi Chemical Corporation Substrat de disque avec une zone mince
JPH10208297A (ja) * 1997-01-22 1998-08-07 Sony Corp 光ディスク基板
CN1215884A (zh) * 1997-10-28 1999-05-05 三星电子株式会社 光盘和制造该光盘的模具

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0821353A2 (fr) * 1996-07-23 1998-01-28 Mitsubishi Chemical Corporation Substrat de disque avec une zone mince
JPH10208297A (ja) * 1997-01-22 1998-08-07 Sony Corp 光ディスク基板
CN1215884A (zh) * 1997-10-28 1999-05-05 三星电子株式会社 光盘和制造该光盘的模具

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HK1028704A2 (en) 2001-02-09
AU2000236534A1 (en) 2001-10-08

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