KR940020332A - 광학 정보 캐리어(Optical information carrier) - Google Patents

광학 정보 캐리어(Optical information carrier) Download PDF

Info

Publication number: KR940020332A
Authority: KR; South Korea
Prior art keywords: layer; information carrier; optical information; auxiliary layer; auxiliary
Prior art date: 1993-02-18
Legal status (The legal status 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 Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Withdrawn

Application number

KR1019940002700A

Other languages

English (en)

Korean (ko)

Inventor

마리누스 요한네스 반 유엔 코스넬리스

페트루스 요한네스 마리아 욘게넬리스 아드리아누스

Original Assignee

프레데릭 안 스미트

필립스 일렉트로닉스 엔.브이.(Philips Electronics N.V.)

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.)

1993-02-18

Filing date

1994-02-16

Publication date

1994-09-16

1994-02-16 Application filed by 프레데릭 안 스미트, 필립스 일렉트로닉스 엔.브이.(Philips Electronics N.V.) filed Critical 프레데릭 안 스미트

1994-09-16 Publication of KR940020332A publication Critical patent/KR940020332A/ko

Status Withdrawn legal-status Critical Current

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
- G11B7/241—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
- 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
- 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
- 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
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/2431—Metals or metalloids group 13 elements (B, Al, Ga, In)
- 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
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24312—Metals or metalloids group 14 elements (e.g. Si, Ge, Sn)
- 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
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24314—Metals or metalloids group 15 elements (e.g. Sb, Bi)
- 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
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24316—Metals or metalloids group 16 elements (i.e. chalcogenides, Se, Te)
- 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
- G11B7/257—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 layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B2007/25705—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 layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
- G11B2007/25706—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 layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing transition metal elements (Zn, Fe, Co, Ni, Pt)
- 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
- G11B7/257—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 layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B2007/25705—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 layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
- G11B2007/25715—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 layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing oxygen
- 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
- G11B7/253—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 substrates
- G11B7/2533—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 substrates comprising resins
- G11B7/2534—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 substrates comprising resins polycarbonates [PC]
- 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
- G11B7/258—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 reflective layers
- G11B7/2595—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 reflective layers based on gold
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/913—Material designed to be responsive to temperature, light, moisture
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
- Y10S430/146—Laser beam

Landscapes

Optical Record Carriers And Manufacture Thereof (AREA)
Thermal Transfer Or Thermal Recording In General (AREA)
Optical Recording Or Reproduction (AREA)

KR1019940002700A 1993-02-18 1994-02-16 광학 정보 캐리어(Optical information carrier) Withdrawn KR940020332A (ko)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
EP93200466.6		1993-02-18
EP93200466		1993-02-18

Publications (1)

Publication Number	Publication Date
KR940020332A true KR940020332A (ko)	1994-09-16

Family

ID=8213651

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
KR1019940002700A Withdrawn KR940020332A (ko)	1993-02-18	1994-02-16	광학 정보 캐리어(Optical information carrier)

Country Status (8)

Country	Link
US (1)	US5442619A (2)
JP (1)	JPH06243507A (2)
KR (1)	KR940020332A (2)
CN (1)	CN1107600A (2)
BR (1)	BR9400592A (2)
CA (1)	CA2115724A1 (2)
SG (1)	SG52438A1 (2)
TW (1)	TW234762B (2)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5712833A (en) *	1993-12-28	1998-01-27	Ogihara; Noriyuki	Durable magneto-optical disk having a rare earth-transition amorphous magneto-optical layer
JP2737666B2 (ja) *	1994-10-18	1998-04-08	日本電気株式会社	光学的情報記録媒体
JPH08329525A (ja) *	1995-03-27	1996-12-13	Hitachi Ltd	情報記録媒体および情報メモリー装置
US5949751A (en) *	1995-09-07	1999-09-07	Pioneer Electronic Corporation	Optical recording medium and a method for reproducing information recorded from same
US6821707B2 (en) *	1996-03-11	2004-11-23	Matsushita Electric Industrial Co., Ltd.	Optical information recording medium, producing method thereof and method of recording/erasing/reproducing information
TW372314B (en)	1996-11-25	1999-10-21	Hitachi Maxell	Data recording medium and data regeneration apparatus thereof
US6503690B1 (en) *	1997-08-12	2003-01-07	Matsushita Electric Industrial Co., Ltd.	Optical information recording medium, method for producing the same, and method for recording and reproducing optical information
JPH11134720A (ja)	1997-08-28	1999-05-21	Matsushita Electric Ind Co Ltd	光学的情報記録媒体及びその記録再生方法
US6343062B1 (en)	1997-09-26	2002-01-29	Matsushita Electric Industrial Co., Ltd	Optical disk device and optical disk for recording and reproducing high-density signals
TW448443B (en)	1998-08-05	2001-08-01	Matsushita Electric Industrial Co Ltd	Optical information storage media and production method as well as the storage reproducing method and device
TWI254934B (en)	2002-04-26	2006-05-11	Tdk Corp	Optical recording medium and method for optically recording data in the same
CN100358030C (zh) *	2002-05-31	2007-12-26	松下电器产业株式会社	光记录介质,光信息处理装置及光记录再现方法
JP2005022196A (ja) *	2003-07-01	2005-01-27	Tdk Corp	光記録ディスク
JP2005044438A (ja)	2003-07-22	2005-02-17	Tdk Corp	光記録ディスク
CN100444188C (zh) *	2005-08-03	2008-12-17	积体数位股份有限公司	声纹密码锁系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4651172A (en) *	1984-11-29	1987-03-17	Hitachi, Ltd.	Information recording medium
JP2538647B2 (ja) *	1988-07-22	1996-09-25	富士通株式会社	光ディスク媒体
US5270149A (en) *	1990-06-16	1993-12-14	Basf Aktiengesellschaft	Reversible optical recording medium of the phase charge type
US5242784A (en) *	1990-07-13	1993-09-07	International Business Machines Corporation	System and method for optical phase change recording
US5346740A (en) *	1990-09-25	1994-09-13	Matsushita Electric Industrial Co., Ltd.	Optical information recording medium
EP0549024B1 (en) *	1991-12-12	1997-11-19	Koninklijke Philips Electronics N.V.	Optical record carrier

1994
- 1994-02-11 SG SG1996004535A patent/SG52438A1/en unknown
- 1994-02-15 CA CA002115724A patent/CA2115724A1/en not_active Abandoned
- 1994-02-15 JP JP6018367A patent/JPH06243507A/ja active Pending
- 1994-02-15 CN CN94101557A patent/CN1107600A/zh active Pending
- 1994-02-16 KR KR1019940002700A patent/KR940020332A/ko not_active Withdrawn
- 1994-02-16 US US08/197,046 patent/US5442619A/en not_active Expired - Fee Related
- 1994-02-17 BR BR9400592A patent/BR9400592A/pt not_active Application Discontinuation
- 1994-02-17 TW TW083101282A patent/TW234762B/zh active

Also Published As

Publication number	Publication date
CN1107600A (zh)	1995-08-30
BR9400592A (pt)	1994-11-22
TW234762B (2)	1994-11-21
CA2115724A1 (en)	1994-08-19
SG52438A1 (en)	1998-09-28
US5442619A (en)	1995-08-15
JPH06243507A (ja)	1994-09-02

Legal Events

Date	Code	Title	Description
1994-02-16	PA0109	Patent application	St.27 status event code: A-0-1-A10-A12-nap-PA0109
1994-02-16	R17-X000	Change to representative recorded	St.27 status event code: A-3-3-R10-R17-oth-X000
1994-09-16	PG1501	Laying open of application	St.27 status event code: A-1-1-Q10-Q12-nap-PG1501
1994-10-19	N231	Notification of change of applicant
1994-10-19	PN2301	Change of applicant	St.27 status event code: A-3-3-R10-R13-asn-PN2301 St.27 status event code: A-3-3-R10-R11-asn-PN2301
1999-01-12	PN2301	Change of applicant	St.27 status event code: A-3-3-R10-R13-asn-PN2301 St.27 status event code: A-3-3-R10-R11-asn-PN2301
1999-01-19	R18-X000	Changes to party contact information recorded	St.27 status event code: A-3-3-R10-R18-oth-X000
1999-01-20	R18-X000	Changes to party contact information recorded	St.27 status event code: A-3-3-R10-R18-oth-X000
1999-02-16	PC1203	Withdrawal of no request for examination	St.27 status event code: N-1-6-B10-B12-nap-PC1203
1999-02-16	WITN	Application deemed withdrawn, e.g. because no request for examination was filed or no examination fee was paid
1999-02-26	PN2301	Change of applicant	St.27 status event code: A-3-3-R10-R13-asn-PN2301 St.27 status event code: A-3-3-R10-R11-asn-PN2301
1999-03-26	PN2301	Change of applicant	St.27 status event code: A-3-3-R10-R13-asn-PN2301 St.27 status event code: A-3-3-R10-R11-asn-PN2301
1999-06-19	PN2301	Change of applicant	St.27 status event code: A-3-3-R10-R13-asn-PN2301 St.27 status event code: A-3-3-R10-R11-asn-PN2301
2000-01-19	PN2301	Change of applicant	St.27 status event code: A-3-3-R10-R13-asn-PN2301 St.27 status event code: A-3-3-R10-R11-asn-PN2301
2013-01-08	P22-X000	Classification modified	St.27 status event code: A-2-2-P10-P22-nap-X000
2013-04-17	R18-X000	Changes to party contact information recorded	St.27 status event code: A-3-3-R10-R18-oth-X000
2013-11-28	PN2301	Change of applicant	St.27 status event code: A-3-3-R10-R13-asn-PN2301 St.27 status event code: A-3-3-R10-R11-asn-PN2301
2018-06-07	P22-X000	Classification modified	St.27 status event code: A-2-2-P10-P22-nap-X000
2020-10-07	R18-X000	Changes to party contact information recorded	St.27 status event code: A-3-3-R10-R18-oth-X000
2024-02-08	R18-X000	Changes to party contact information recorded	St.27 status event code: A-3-3-R10-R18-oth-X000
2024-03-14	R18-X000	Changes to party contact information recorded	St.27 status event code: A-3-3-R10-R18-oth-X000
2026-04-09	R18	Changes to party contact information recorded	Free format text: ST27 STATUS EVENT CODE: A-3-3-R10-R18-OTH-X000 (AS PROVIDED BY THE NATIONAL OFFICE)
2026-04-09	R18-X000	Changes to party contact information recorded	St.27 status event code: A-3-3-R10-R18-oth-X000

Publication	Publication Date	Title
KR960015455A (ko)	1996-05-22	광학 정보 기록 매체
KR860004395A (ko)	1986-06-20	정보의 기록.소거방법
JP4571238B2 (ja)	2010-10-27	フェーズ変化記録層を有する光学記録媒体
US6670013B2 (en)	2003-12-30	Optical recording medium and use of such optical recording medium
KR960032364A (ko)	1996-09-17	광학적정보기록매체
JPH07111788B2 (ja)	1995-11-29	光情報記録媒体
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KR920008463B1 (ko)	1992-09-30	정보기록매체
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KR100697135B1 (ko)	2007-03-21	광 기록 매체
US5741603A (en)	1998-04-21	Optical disc
US6064642A (en)	2000-05-16	Phase-change type optical disk
US5442619A (en)	1995-08-15	Erasable optical recording medium with a reversible light absorption layer
KR890702193A (ko)	1989-12-23	광학정보 기록매체
KR100753968B1 (ko)	2007-08-31	다시 쓰기 가능한 광학 정보 기록매체
KR100854953B1 (ko)	2008-08-28	재기록가능한 광학 데이터 저장매체와 이 매체의 용도
US5385806A (en)	1995-01-31	Optical information recording medium
US6706360B2 (en)	2004-03-16	Optical recording medium
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US5432048A (en)	1995-07-11	Rewritable photochromic optical disc
US6403193B1 (en)	2002-06-11	Optical recording medium
US20040001424A1 (en)	2004-01-01	Information read/write medium
Chao et al.	1990	Multiple phase change of lead oxide film for optical storage
JPS60164937A (ja)	1985-08-28	情報記録媒体
JP2001184722A (ja)	2001-07-06	相変化光ディスク