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WO2003067593A1 - Optical disk - Google Patents

Optical disk Download PDF

Info

Publication number
WO2003067593A1
WO2003067593A1 PCT/KR2003/000219 KR0300219W WO03067593A1 WO 2003067593 A1 WO2003067593 A1 WO 2003067593A1 KR 0300219 W KR0300219 W KR 0300219W WO 03067593 A1 WO03067593 A1 WO 03067593A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical disk
displaying surface
displaying
receiving layer
ink receiving
Prior art date
Application number
PCT/KR2003/000219
Other languages
French (fr)
Inventor
Ki-Bong Kim
Original Assignee
Skc Co., Ltd.
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 Skc Co., Ltd. filed Critical Skc Co., Ltd.
Priority to AU2003206214A priority Critical patent/AU2003206214A1/en
Publication of WO2003067593A1 publication Critical patent/WO2003067593A1/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
    • 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
    • G11B23/38—Visual features other than those contained in record tracks or represented by sprocket holes the visual signals being auxiliary signals
    • G11B23/40—Identifying or analogous means applied to or incorporated in the record carrier and not intended for visual display simultaneously with the playing-back of the record carrier, e.g. label, leader, photograph
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
    • 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
    • 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
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5209—Coatings prepared by radiation-curing, e.g. using photopolymerisable compositions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5254—Macromolecular coatings characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
    • 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
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/254—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers
    • G11B7/2542—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers consisting essentially of organic resins

Definitions

  • the present invention relates to an optical disk, and more particularly, to an optical disk having an enlarged printing surface area.
  • Optical disks are generally data storage media used to reproduce digital data recorded on an optical recording surface using a compact disk player, CD ROM drive, digital video drive, or the like.
  • An optical disk is circular and has an optical recording surface on which digital data can be optically recorded and a displaying surface that displays the contents of the optically recorded digital data.
  • a recording operation on the recording surface is achieved by forming a pit using a laser. Data recorded by forming the pit is reproduced using the laser.
  • a user can directly write optical recording contents, memos, or the like on the displaying surface, not on the recording surface, using a writing tool.
  • the user can also print letters, figures, pictures, or the like on the displaying surface using a printer. For example, the user can put various types of information to be displayed on a displaying surface of an optical disk using an inkjet printer that is developed only for an optical disk.
  • Korean Patent Publication No. 99-29618 discloses a recording medium having an ink receiving layer containing a hydrophilic resin and a cationic compound.
  • International Patent Publication No. WO 99/16835 describes an ink container having (meth)acryl monomer, a radial thermosetting compound containing (meth)acryl monomer, and an absorbent inorganic or organic filler. Such an ink receiving layer coats a displaying surface of an optical disk when manufacturing the optical disk, and thus helps a printing operation to be smoothly performed.
  • FIG. 1 is a perspective view of a general optical disk.
  • a displaying surface 2 is formed on one side of an optical disk 1.
  • a through hole 3, which penetrates through the displaying surface 2, is formed in the center of the optical disk 1.
  • a groove 4 is concentrically formed with the through hole 3.
  • the groove 4 is loop-shaped and serves as a border at which the optical disk 1 is surface-treated prior to printing.
  • a radius a of the through hole 3 is generally 7.5 mm
  • a radius b from the center of the optical disk 1 to the groove 4 is 17 mm
  • a total radius c of the optical disk 1 is 60 mm.
  • a portion of the displaying surface 2 in which printing can be substantially performed is limited to a radius within the range of 28 - 58.5 mm from the center of the optical disk 1.
  • the optical disk 1 having the displaying surface 2 shown in FIG. 1 has the following problems.
  • the printing surface of the displaying surface 2 is limited.
  • the printing area of the displaying surface 2 is limited.
  • the groove 4 is an obstacle to printing. If printing is performed in the entire area of displaying surface 2 without considering the existence of the groove 4, poor printing may be carried out at a portion of the groove 4.
  • two silk screen masks corresponding to outside and inside portions of the radial direction of the groove 4 are required.
  • the present invention provides an improved optical disk.
  • the present invention also provides an optical disk having a displaying surface with the maximum area on which printing can be performed.
  • an optical disk including an optical recording surface, a displaying surface, a through hole, and an ink receiving layer.
  • the optical recording surface is formed on one side of the optical disk.
  • the displaying surface is formed on the other side of the optical disk, which is the rear surface of the optical recording surface, and is totally flat.
  • the through hole penetrates through the optical recording surface and the displaying surface.
  • the ink receiving layer coats the displaying surface so as to improve an adhesive strength between the displaying surface and ink.
  • FIG. 1 is a perspective view of an optical disk according to the prior art
  • FIG. 2 is a schematic perspective view of an optical disk according to the present invention.
  • FIG. 2 is a schematic perspective view of an optical disk according to an embodiment of the present invention.
  • an optical disk 11 has a displaying surface 12 on one side thereof.
  • a through hole 13 is formed in the center of the optical disk 1 1.
  • ink jet printing can be performed in the entire area of displaying surface 12 of the optical disk 11.
  • the formation of the groove 4 is excluded and the entire area of displaying surface 12 is made flat.
  • inkjet printing can be carried out in the entire area of the displaying surface 12 except the through hole 13.
  • it is preferable that printing is performed from a radial position at a distance of 11.4 mm from the center of the optical disk 11 to a radial position at a distance of 58.5 mm from the center of the optical disk 11.
  • the displaying surface 12 of the optical disk 11 is coated with an ink receiving layer (not shown).
  • the ink receiving layer coats the entire area of displaying surface 12 when manufacturing the optical disk 11 so that inkjet printing is smoothly performed.
  • the ink receiving layer may be the same as the above-described ink receiving layer.
  • the ink receiving layer may be an ultraviolet thermosetting composition containing 100 weight parts of methacryl monomer, from about 150 to about 250 weight parts of methacrylate oligomer, and from about 10 to about 100 weight parts of N-vinyl-2-pyrrolidone.
  • the ultraviolet thermosetting composition is hardened by coating the displaying surface 12 with the ultraviolet thermosetting composition and radiating ultraviolet rays onto the ultraviolet thermosetting composition.
  • the adhesive strength between the ink receiving layer and the displaying surface 12 of the optical disk 11 is good, and the absorptivity of, the adsorption onto, the dryness of, and the water-resistance against aqueous ink are very good.
  • a high-quality recording medium can be provided.
  • Such an ultraviolet thermosetting composition is disclosed in Korean Patent Application No. 2001-44204.
  • a displaying surface of an optical disk is totally flat, and thus the printing area thereof can be enlarged.
  • the available area on which information or images of the contents recorded on the optical disk can be printed can be expanded.
  • printing can be performed in the entire area of the displaying surface.
  • printing costs and printing processes can be reduced.
  • an ink receiving layer having a good ultraviolet thermosetting composition can be formed on the displaying surface, the adhesiveness of the displaying surface to ink is good.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Ink Jet (AREA)

Abstract

Provided is an optical disk. The optical disk includes an optical recording surface, a displaying surface, a through hole, and an ink receiving layer. The optical recording surface is formed on one side of the opticaldisk. The displaying surface is formed on the other side of the optical disk, which is the rear surface of theoptical recording surface, and is totally flat. The through hole penetrates through the optical recording surfaceand the displaying surface. The ink receiving layer coats the displaying surface so as to improve an adhesive strength between the displaying surface and ink.

Description

OPTICAL DISK
Technical Field The present invention relates to an optical disk, and more particularly, to an optical disk having an enlarged printing surface area.
Background Art
Optical disks are generally data storage media used to reproduce digital data recorded on an optical recording surface using a compact disk player, CD ROM drive, digital video drive, or the like. An optical disk is circular and has an optical recording surface on which digital data can be optically recorded and a displaying surface that displays the contents of the optically recorded digital data. A recording operation on the recording surface is achieved by forming a pit using a laser. Data recorded by forming the pit is reproduced using the laser. A user can directly write optical recording contents, memos, or the like on the displaying surface, not on the recording surface, using a writing tool. The user can also print letters, figures, pictures, or the like on the displaying surface using a printer. For example, the user can put various types of information to be displayed on a displaying surface of an optical disk using an inkjet printer that is developed only for an optical disk.
In order to print data on a displaying surface of an optical disk using an inkjet printer, a variety of methods of forming an ink receiving layer on the displaying surface have been suggested. For example, Korean Patent Publication No. 99-29618 discloses a recording medium having an ink receiving layer containing a hydrophilic resin and a cationic compound. International Patent Publication No. WO 99/16835 describes an ink container having (meth)acryl monomer, a radial thermosetting compound containing (meth)acryl monomer, and an absorbent inorganic or organic filler. Such an ink receiving layer coats a displaying surface of an optical disk when manufacturing the optical disk, and thus helps a printing operation to be smoothly performed.
FIG. 1 is a perspective view of a general optical disk. Referring to FIG. 1 , a displaying surface 2 is formed on one side of an optical disk 1. A through hole 3, which penetrates through the displaying surface 2, is formed in the center of the optical disk 1. When the optical disk 1 is loaded into a compact disc player, a protrusion of a turntable (not shown) is inserted into the through hole 3 so that the optical disk 1 is correctly positioned therein.
A groove 4 is concentrically formed with the through hole 3. The groove 4 is loop-shaped and serves as a border at which the optical disk 1 is surface-treated prior to printing. In general, a radius a of the through hole 3 is generally 7.5 mm, a radius b from the center of the optical disk 1 to the groove 4 is 17 mm, and a total radius c of the optical disk 1 is 60 mm. Here, a portion of the displaying surface 2 in which printing can be substantially performed is limited to a radius within the range of 28 - 58.5 mm from the center of the optical disk 1.
The optical disk 1 having the displaying surface 2 shown in FIG. 1 has the following problems. First, the printing surface of the displaying surface 2 is limited. In other words, since printing is substantially carried out only on a portion of the displaying surface 2 not the whole surface thereof, the printing area of the displaying surface 2 is limited. Also, the groove 4 is an obstacle to printing. If printing is performed in the entire area of displaying surface 2 without considering the existence of the groove 4, poor printing may be carried out at a portion of the groove 4. Moreover, in order to perform quality printing regardless of the groove 4, two silk screen masks corresponding to outside and inside portions of the radial direction of the groove 4 are required.
Disclosure of the Invention Accordingly, the present invention provides an improved optical disk.
The present invention also provides an optical disk having a displaying surface with the maximum area on which printing can be performed.
According to an aspect of the present invention, there is provided an optical disk including an optical recording surface, a displaying surface, a through hole, and an ink receiving layer. The optical recording surface is formed on one side of the optical disk. The displaying surface is formed on the other side of the optical disk, which is the rear surface of the optical recording surface, and is totally flat. The through hole penetrates through the optical recording surface and the displaying surface. The ink receiving layer coats the displaying surface so as to improve an adhesive strength between the displaying surface and ink.
Brief Description of the Drawings
FIG. 1 is a perspective view of an optical disk according to the prior art; and FIG. 2 is a schematic perspective view of an optical disk according to the present invention.
Best mode for carrying out the Invention
Hereinafter, an embodiment of the present invention will be described in detail with reference to the attached drawings.
FIG. 2 is a schematic perspective view of an optical disk according to an embodiment of the present invention. Referring to FIG. 2, an optical disk 11 has a displaying surface 12 on one side thereof. A through hole 13 is formed in the center of the optical disk 1 1. When the optical disk 1 1 is loaded into a compact disk player, a protrusion of a turntable (not shown) is inserted into the through hole 13 so that the optical disk 11 is correctly positioned therein.
According to the present invention, since the displaying surface 12 of the optical disk 11 is totally flat, ink jet printing can be performed in the entire area of displaying surface 12 of the optical disk 11. In other words, unlike the prior art, in the present invention, the formation of the groove 4 is excluded and the entire area of displaying surface 12 is made flat. Thus, inkjet printing can be carried out in the entire area of the displaying surface 12 except the through hole 13. However, it is preferable that printing is performed from a radial position at a distance of 11.4 mm from the center of the optical disk 11 to a radial position at a distance of 58.5 mm from the center of the optical disk 11.
The displaying surface 12 of the optical disk 11 is coated with an ink receiving layer (not shown). Here, the ink receiving layer coats the entire area of displaying surface 12 when manufacturing the optical disk 11 so that inkjet printing is smoothly performed. The ink receiving layer may be the same as the above-described ink receiving layer. Alternatively, the ink receiving layer may be an ultraviolet thermosetting composition containing 100 weight parts of methacryl monomer, from about 150 to about 250 weight parts of methacrylate oligomer, and from about 10 to about 100 weight parts of N-vinyl-2-pyrrolidone. The ultraviolet thermosetting composition is hardened by coating the displaying surface 12 with the ultraviolet thermosetting composition and radiating ultraviolet rays onto the ultraviolet thermosetting composition. In a case where the ink receiving layer is formed of the ultraviolet thermosetting composition, the adhesive strength between the ink receiving layer and the displaying surface 12 of the optical disk 11 is good, and the absorptivity of, the adsorption onto, the dryness of, and the water-resistance against aqueous ink are very good. Thus, a high-quality recording medium can be provided. Such an ultraviolet thermosetting composition is disclosed in Korean Patent Application No. 2001-44204.
While the present invention has been particularly shown and described with reference to an exemplary embodiment thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Industrial Applicability As described above, according to the present invention, a displaying surface of an optical disk is totally flat, and thus the printing area thereof can be enlarged. Thus, the available area on which information or images of the contents recorded on the optical disk can be printed can be expanded. Also, even when only one silk screen mask is used, printing can be performed in the entire area of the displaying surface. Thus, printing costs and printing processes can be reduced. Furthermore, since an ink receiving layer having a good ultraviolet thermosetting composition can be formed on the displaying surface, the adhesiveness of the displaying surface to ink is good.

Claims

What is claimed is:
1. An optical disk comprising: an optical recording surface that is formed on one side of the optical disk; a displaying surface that is formed on the other side of the optical disk, which is the rear surface of the optical recording surface, and is totally flat; and, a through hole that penetrates through the optical recording surface and the displaying surface
2. An optical disk as claimed in claim 1 , wherein the optical disk further comprises an ink receiving layer that coats the displaying surface so as to improve an adhesive strength between the displaying surface and ink.
3. The optical disk of claim 2, wherein the ink receiving layer is an ultraviolet thermosetting composition containing 100 weight parts of (meth)acryl monomer, from about 150 to about 250 weight parts of (meth)acrylate oligomer, and from about 10 to about 100 weight parts of N-vinyl-2-pyrrolidone.
PCT/KR2003/000219 2002-02-02 2003-01-30 Optical disk WO2003067593A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003206214A AU2003206214A1 (en) 2002-02-02 2003-01-30 Optical disk

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2002/6056 2002-02-02
KR1020020006056A KR20030065960A (en) 2002-02-02 2002-02-02 Optical disk

Publications (1)

Publication Number Publication Date
WO2003067593A1 true WO2003067593A1 (en) 2003-08-14

Family

ID=27725676

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2003/000219 WO2003067593A1 (en) 2002-02-02 2003-01-30 Optical disk

Country Status (3)

Country Link
KR (1) KR20030065960A (en)
AU (1) AU2003206214A1 (en)
WO (1) WO2003067593A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514156A2 (en) * 1991-05-16 1992-11-19 Donald Spector Improved compact disc package
JPH09180251A (en) * 1995-12-22 1997-07-11 Pioneer Electron Corp Disk substrate, metal mold for molding the same, and optical disk
EP0802245A1 (en) * 1996-04-16 1997-10-22 Canon Kabushiki Kaisha Coating composition, printing medium and image forming process using the same
JPH11100527A (en) * 1997-09-27 1999-04-13 Tdk Corp Coating composition and optical recording medium
KR20000021806A (en) * 1998-09-30 2000-04-25 장용균 Ultraviolet curable composition and hard coat film utilizing it
KR20020016504A (en) * 2000-08-25 2002-03-04 강영우 UV curable coating composition and optical recording medium using the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05205320A (en) * 1992-01-28 1993-08-13 Victor Co Of Japan Ltd Production of disk and disk
KR20040091848A (en) * 2003-04-22 2004-11-02 엘지전자 주식회사 Optical disk

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514156A2 (en) * 1991-05-16 1992-11-19 Donald Spector Improved compact disc package
JPH09180251A (en) * 1995-12-22 1997-07-11 Pioneer Electron Corp Disk substrate, metal mold for molding the same, and optical disk
EP0802245A1 (en) * 1996-04-16 1997-10-22 Canon Kabushiki Kaisha Coating composition, printing medium and image forming process using the same
JPH11100527A (en) * 1997-09-27 1999-04-13 Tdk Corp Coating composition and optical recording medium
KR20000021806A (en) * 1998-09-30 2000-04-25 장용균 Ultraviolet curable composition and hard coat film utilizing it
KR20020016504A (en) * 2000-08-25 2002-03-04 강영우 UV curable coating composition and optical recording medium using the same

Also Published As

Publication number Publication date
KR20030065960A (en) 2003-08-09
AU2003206214A1 (en) 2003-09-02

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