JPS6484436A - Production of magnetic recording medium - Google Patents
Production of magnetic recording mediumInfo
- Publication number
- JPS6484436A JPS6484436A JP24016487A JP24016487A JPS6484436A JP S6484436 A JPS6484436 A JP S6484436A JP 24016487 A JP24016487 A JP 24016487A JP 24016487 A JP24016487 A JP 24016487A JP S6484436 A JPS6484436 A JP S6484436A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- recording medium
- magnetic recording
- sputtering
- coercive force
- 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
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To form a magnetic recording medium having high coercive force with good economy by laminating an underlying layer of a nonmagnetic metal, magnetic layer and protective lubricating layer successively by sputtering on a nonmagnetic substrate which is coated with a specific plating layer and is heated to and held at a specific temp. in a vacuum. CONSTITUTION:The nonmagnetic substrate 1 which is coated with the electroless plating layer 2 of an Ni-P alloy is heated to a >=100 deg.C and <=200 deg.C range in the vacuum. While this temp. is maintained, the underlying layer 3 of the nonmagnetic metal consisting of Cr, the magnetic layer 4 consisting of a Co alloy system, and the protective lubricating layer 5 are successively formed and laminated by sputtering on this substrate 1. The coercive force is thereby enhanced and the magnetic recording medium having the high coercive force is formed with the good economy without increasing the thickness of the layer 3 and without increasing argon pressure at the time of sputtering.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62240164A JPH0731810B2 (en) | 1987-09-25 | 1987-09-25 | Method of manufacturing magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62240164A JPH0731810B2 (en) | 1987-09-25 | 1987-09-25 | Method of manufacturing magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6484436A true JPS6484436A (en) | 1989-03-29 |
JPH0731810B2 JPH0731810B2 (en) | 1995-04-10 |
Family
ID=17055446
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62240164A Expired - Lifetime JPH0731810B2 (en) | 1987-09-25 | 1987-09-25 | Method of manufacturing magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0731810B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0371427A (en) * | 1989-08-09 | 1991-03-27 | Fuji Electric Co Ltd | Production of magnetic recording medium |
JPH03127329A (en) * | 1989-10-13 | 1991-05-30 | Fuji Electric Co Ltd | Production of magnetic recording medium |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5753829A (en) * | 1980-09-18 | 1982-03-31 | Toshiba Corp | Production of magnetic recording medium |
JPS5936326A (en) * | 1982-08-23 | 1984-02-28 | Fujitsu Ltd | Vertically magnetized recording medium and its production |
JPS61233427A (en) * | 1985-04-09 | 1986-10-17 | Toshiba Corp | Production of magnetic recording medium |
JPS62125523A (en) * | 1985-11-26 | 1987-06-06 | Hitachi Metals Ltd | Magnetic recording medium |
-
1987
- 1987-09-25 JP JP62240164A patent/JPH0731810B2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5753829A (en) * | 1980-09-18 | 1982-03-31 | Toshiba Corp | Production of magnetic recording medium |
JPS5936326A (en) * | 1982-08-23 | 1984-02-28 | Fujitsu Ltd | Vertically magnetized recording medium and its production |
JPS61233427A (en) * | 1985-04-09 | 1986-10-17 | Toshiba Corp | Production of magnetic recording medium |
JPS62125523A (en) * | 1985-11-26 | 1987-06-06 | Hitachi Metals Ltd | Magnetic recording medium |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0371427A (en) * | 1989-08-09 | 1991-03-27 | Fuji Electric Co Ltd | Production of magnetic recording medium |
JPH03127329A (en) * | 1989-10-13 | 1991-05-30 | Fuji Electric Co Ltd | Production of magnetic recording medium |
Also Published As
Publication number | Publication date |
---|---|
JPH0731810B2 (en) | 1995-04-10 |
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Legal Events
Date | Code | Title | Description |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080410 Year of fee payment: 13 |