JPS5661031A - Optical magnetic recording medium - Google Patents
Optical magnetic recording mediumInfo
- Publication number
- JPS5661031A JPS5661031A JP13512379A JP13512379A JPS5661031A JP S5661031 A JPS5661031 A JP S5661031A JP 13512379 A JP13512379 A JP 13512379A JP 13512379 A JP13512379 A JP 13512379A JP S5661031 A JPS5661031 A JP S5661031A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- magnetic recording
- area
- film surface
- magnetizing axis
- 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.)
- Granted
Links
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
PURPOSE: To obtain optical magnetic recording medium easy for tracking of optical beam in reading and writing, by alternately arranging the area having an easy magnetizing axis orthogonal to the film surface and the area not having it, in an optical magnetic recording medium of vertical magnetizing system.
CONSTITUTION: On a substrate 3 like glass, an amorphous alloy thin film 12 having the easy magnetizing axis 13 toward vertical film surface is formed by vapor deposition of GeFe and TbFe. Next, the thin film 12 is irradiated and swept with a laser beam having 500mWW1W of power, heat treatment and crystallization are made. The part is taken as an optical guide area 14 having the easy magnetizing axis in parallel with the film surface, and the part not radiated is taken as an area 10 having the easy magnetizing axis in the vertical direction to the film surface.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13512379A JPS5830656B2 (en) | 1979-10-22 | 1979-10-22 | magneto-optical recording medium |
US06/197,805 US4412264A (en) | 1979-10-22 | 1980-10-17 | Magneto-optic recording medium |
NL8005795A NL8005795A (en) | 1979-10-22 | 1980-10-21 | MAGNETO-OPTICAL MEMORY. |
GB8034070A GB2064847B (en) | 1979-10-22 | 1980-10-22 | Recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13512379A JPS5830656B2 (en) | 1979-10-22 | 1979-10-22 | magneto-optical recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5661031A true JPS5661031A (en) | 1981-05-26 |
JPS5830656B2 JPS5830656B2 (en) | 1983-06-30 |
Family
ID=15144353
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13512379A Expired JPS5830656B2 (en) | 1979-10-22 | 1979-10-22 | magneto-optical recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5830656B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56119991A (en) * | 1980-02-27 | 1981-09-19 | Sharp Corp | Optical memory device |
JPS57191848A (en) * | 1981-05-20 | 1982-11-25 | Matsushita Electric Ind Co Ltd | Optical disk recording and reproducing device |
JPH0237544A (en) * | 1988-07-28 | 1990-02-07 | Toshiba Corp | Magneto-optical recording medium |
JPH03242841A (en) * | 1990-02-21 | 1991-10-29 | Matsushita Electric Ind Co Ltd | Magneto-optical disk |
US6977786B2 (en) | 2001-10-04 | 2005-12-20 | Fuji Photo Film Co., Ltd. | Information recording method using a vertical magnetic system |
US8139469B2 (en) * | 2008-06-30 | 2012-03-20 | Thomson Licensing | Compatible optical recording medium |
-
1979
- 1979-10-22 JP JP13512379A patent/JPS5830656B2/en not_active Expired
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56119991A (en) * | 1980-02-27 | 1981-09-19 | Sharp Corp | Optical memory device |
JPH0255854B2 (en) * | 1980-02-27 | 1990-11-28 | Sharp Kk | |
JPS57191848A (en) * | 1981-05-20 | 1982-11-25 | Matsushita Electric Ind Co Ltd | Optical disk recording and reproducing device |
JPH0459693B2 (en) * | 1981-05-20 | 1992-09-24 | Matsushita Electric Ind Co Ltd | |
JPH0237544A (en) * | 1988-07-28 | 1990-02-07 | Toshiba Corp | Magneto-optical recording medium |
JPH03242841A (en) * | 1990-02-21 | 1991-10-29 | Matsushita Electric Ind Co Ltd | Magneto-optical disk |
US6977786B2 (en) | 2001-10-04 | 2005-12-20 | Fuji Photo Film Co., Ltd. | Information recording method using a vertical magnetic system |
US8139469B2 (en) * | 2008-06-30 | 2012-03-20 | Thomson Licensing | Compatible optical recording medium |
Also Published As
Publication number | Publication date |
---|---|
JPS5830656B2 (en) | 1983-06-30 |
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