JPH01150246A - Optical information recording medium - Google Patents

Optical information recording medium

Info

Publication number
JPH01150246A
JPH01150246A JP30854987A JP30854987A JPH01150246A JP H01150246 A JPH01150246 A JP H01150246A JP 30854987 A JP30854987 A JP 30854987A JP 30854987 A JP30854987 A JP 30854987A JP H01150246 A JPH01150246 A JP H01150246A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
recording
formed
beam
film
pits
Prior art date
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.)
Expired - Lifetime
Application number
JP30854987A
Other versions
JPH07118092B2 (en )
Inventor
Masaharu Ishigaki
Koichi Moriya
Nobuhiro Tokujiyuku
Original Assignee
Hitachi 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

Links

Abstract

PURPOSE: To improve recording sensitivity by forming a heat absorptive film on the surface of a thermoplastic substrate on which grooves for decreasing reflectivity are formed and thermally deforming the parts irradiated with a light beam, thereby recording information.
CONSTITUTION: The heat absorptive film 5 consisting of a thin film of a BiTe system, etc., is formed on the surface of the substrate 10 which consists of polycarbonate, etc., and is formed with the grooves 3 in the data recording region and address pits 1 and wobble pits 2 on the outside of the data recording region. The laser beam 7 is projected by an objective lens 8 on the optical disk formed in such a manner to deform the grooves 3, by which recording pits 4 are formed. Since the thermal deformation temp. of the substrate 10 is about ≤140°C, the recording is executed at the increased reflectivity by the small light beam. The recording sensitivity is, therefore, improved without degrading the reliability and the dealing with the high-speed and high-density recording is possible.
COPYRIGHT: (C)1989,JPO&Japio
JP30854987A 1987-12-08 1987-12-08 Optical information recording medium Expired - Lifetime JPH07118092B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30854987A JPH07118092B2 (en) 1987-12-08 1987-12-08 Optical information recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30854987A JPH07118092B2 (en) 1987-12-08 1987-12-08 Optical information recording medium

Publications (2)

Publication Number Publication Date
JPH01150246A true true JPH01150246A (en) 1989-06-13
JPH07118092B2 JPH07118092B2 (en) 1995-12-18

Family

ID=17982365

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30854987A Expired - Lifetime JPH07118092B2 (en) 1987-12-08 1987-12-08 Optical information recording medium

Country Status (1)

Country Link
JP (1) JPH07118092B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5155723A (en) * 1988-07-30 1992-10-13 Yuden Co., Ltd. Taiyo Optical information recording method and medium
US5714748A (en) * 1992-10-02 1998-02-03 Goldstar Co., Ltd. Magnetic cards employing optical recording material
US5878007A (en) * 1993-12-27 1999-03-02 Matsushita Electric Industrial Co., Ltd. Anti-wobble optical medium and tracking method and apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5871194A (en) * 1981-10-23 1983-04-27 Toshiba Corp Optical information recording medium
JPS58199441A (en) * 1982-05-14 1983-11-19 Nec Corp Optical recording system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5871194A (en) * 1981-10-23 1983-04-27 Toshiba Corp Optical information recording medium
JPS58199441A (en) * 1982-05-14 1983-11-19 Nec Corp Optical recording system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5155723A (en) * 1988-07-30 1992-10-13 Yuden Co., Ltd. Taiyo Optical information recording method and medium
US5714748A (en) * 1992-10-02 1998-02-03 Goldstar Co., Ltd. Magnetic cards employing optical recording material
US5878007A (en) * 1993-12-27 1999-03-02 Matsushita Electric Industrial Co., Ltd. Anti-wobble optical medium and tracking method and apparatus

Also Published As

Publication number Publication date Type
JPH07118092B2 (en) 1995-12-18 grant

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term