JPS6479919A - Magnetic disk and its production - Google Patents
Magnetic disk and its productionInfo
- Publication number
- JPS6479919A JPS6479919A JP23821387A JP23821387A JPS6479919A JP S6479919 A JPS6479919 A JP S6479919A JP 23821387 A JP23821387 A JP 23821387A JP 23821387 A JP23821387 A JP 23821387A JP S6479919 A JPS6479919 A JP S6479919A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- metal
- underlying
- layer consisting
- ferromagnetic
- 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.)
- Pending
Links
Landscapes
- Magnetic Record Carriers (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To improve magnetic characteristics by laminating a ferromagnetic layer consisting of a prescribed metal on an underlying layer consisting of a prescribed metal and diffusing and segregating the underlying metal into the ferromagnetic layer. CONSTITUTION:The underlying layer consisting of the metal selected from Cr, Cu, Mn, Mo, Si, Ta, Ti, V, and W or the alloy thereof is formed on a nonmagnetic substrate. The ferromagnetic layer consisting of Co or essentially consisting of Co is laminated thereon. After this substrate is heated to the crystal phase transformation point (-400 deg.C) of the material forming the ferromagnetic material or above, the substrate is cooled under impression of a magnetic field in the horizontal direction (circumferential direction of a disk) to diffuse and segregate the underlying metal into the magnetic layer. The substrate is preferably subjected to a previous heating treatment at >=700 deg.C in this case. A glass or ceramic substrate is used for the substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23821387A JPS6479919A (en) | 1987-09-22 | 1987-09-22 | Magnetic disk and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23821387A JPS6479919A (en) | 1987-09-22 | 1987-09-22 | Magnetic disk and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6479919A true JPS6479919A (en) | 1989-03-24 |
Family
ID=17026829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23821387A Pending JPS6479919A (en) | 1987-09-22 | 1987-09-22 | Magnetic disk and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6479919A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0581638A (en) * | 1991-04-26 | 1993-04-02 | Victor Co Of Japan Ltd | Magnetic recording medium |
| JPH06103574A (en) * | 1992-05-01 | 1994-04-15 | Internatl Business Mach Corp <Ibm> | Method for decreasing magnetic moment and data recorder |
| WO2000077778A1 (en) * | 1999-06-14 | 2000-12-21 | Fujitsu Limited | Magnetic recording medium, method of manufacture thereof, and magnetic disk device |
-
1987
- 1987-09-22 JP JP23821387A patent/JPS6479919A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0581638A (en) * | 1991-04-26 | 1993-04-02 | Victor Co Of Japan Ltd | Magnetic recording medium |
| JPH06103574A (en) * | 1992-05-01 | 1994-04-15 | Internatl Business Mach Corp <Ibm> | Method for decreasing magnetic moment and data recorder |
| WO2000077778A1 (en) * | 1999-06-14 | 2000-12-21 | Fujitsu Limited | Magnetic recording medium, method of manufacture thereof, and magnetic disk device |
| KR100639620B1 (en) * | 1999-06-14 | 2006-10-30 | 후지쯔 가부시끼가이샤 | Magnetic recording medium, method of manufacture thereof, and magnetic disk device |
| US7270897B2 (en) | 1999-06-14 | 2007-09-18 | Fujitsu Limited | Magnetic recording medium, method of manufacturing the same medium and magnetic disc drive |
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