JPS53123906A - Magnetic disc - Google Patents
Magnetic discInfo
- Publication number
- JPS53123906A JPS53123906A JP3869877A JP3869877A JPS53123906A JP S53123906 A JPS53123906 A JP S53123906A JP 3869877 A JP3869877 A JP 3869877A JP 3869877 A JP3869877 A JP 3869877A JP S53123906 A JPS53123906 A JP S53123906A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disc
- reproducer
- recorder
- depositing
- suction
- 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
- Manufacturing Of Magnetic Record Carriers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE: To achieve the reduction in size and increase in speed of a recorder-reproducer by depositing a magnetic film on a rough surface by fine grooves which are applied in concentrical circular form to substrate surface and making highdensity recording in the flat substrate without suction-contact of a head.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3869877A JPS53123906A (en) | 1977-04-05 | 1977-04-05 | Magnetic disc |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3869877A JPS53123906A (en) | 1977-04-05 | 1977-04-05 | Magnetic disc |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS53123906A true JPS53123906A (en) | 1978-10-28 |
Family
ID=12532518
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3869877A Pending JPS53123906A (en) | 1977-04-05 | 1977-04-05 | Magnetic disc |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS53123906A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5423508A (en) * | 1977-07-25 | 1979-02-22 | Nippon Telegr & Teleph Corp <Ntt> | Magnetic disc medium |
JPS60236116A (en) * | 1984-05-08 | 1985-11-22 | Nec Corp | Magnetic disk and its production |
JPS61168118A (en) * | 1985-01-22 | 1986-07-29 | Victor Co Of Japan Ltd | Magnetic recording medium |
JPS61202324A (en) * | 1985-03-06 | 1986-09-08 | Victor Co Of Japan Ltd | Magnetic recording medium |
JPS61242334A (en) * | 1985-04-19 | 1986-10-28 | Fuji Electric Co Ltd | Production of magnetic disk |
JPS62273619A (en) * | 1986-05-21 | 1987-11-27 | Hitachi Ltd | Magnetic disk |
JPS6348610A (en) * | 1986-08-15 | 1988-03-01 | Nec Corp | Magnetic recording medium |
JPH0325725A (en) * | 1989-06-23 | 1991-02-04 | Fujitsu Ltd | Magnetic recording medium and production thereof |
JPH03116416A (en) * | 1990-04-27 | 1991-05-17 | Hitachi Ltd | Production of magnetic disk medium |
US5082747A (en) * | 1985-11-12 | 1992-01-21 | Hedgcoth Virgle L | Magnetic recording disk and sputtering process and apparatus for producing same |
JPH05182385A (en) * | 1991-12-28 | 1993-07-23 | Nec Corp | Magnetic disk device |
US5316864A (en) * | 1985-11-12 | 1994-05-31 | Hedgcoth Virgle L | Sputtered magnetic recording disk |
JPH06342520A (en) * | 1994-01-13 | 1994-12-13 | Fuji Electric Co Ltd | Production of magnetic disk |
-
1977
- 1977-04-05 JP JP3869877A patent/JPS53123906A/en active Pending
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5423508A (en) * | 1977-07-25 | 1979-02-22 | Nippon Telegr & Teleph Corp <Ntt> | Magnetic disc medium |
JPS578530B2 (en) * | 1977-07-25 | 1982-02-17 | ||
JPS60236116A (en) * | 1984-05-08 | 1985-11-22 | Nec Corp | Magnetic disk and its production |
JPS61168118A (en) * | 1985-01-22 | 1986-07-29 | Victor Co Of Japan Ltd | Magnetic recording medium |
JPH0467684B2 (en) * | 1985-01-22 | 1992-10-29 | Victor Company Of Japan | |
JPS61202324A (en) * | 1985-03-06 | 1986-09-08 | Victor Co Of Japan Ltd | Magnetic recording medium |
JPH0467685B2 (en) * | 1985-03-06 | 1992-10-29 | Victor Company Of Japan | |
JPS61242334A (en) * | 1985-04-19 | 1986-10-28 | Fuji Electric Co Ltd | Production of magnetic disk |
JPH0450646B2 (en) * | 1985-04-19 | 1992-08-14 | Fuji Electric Co Ltd | |
US5082747A (en) * | 1985-11-12 | 1992-01-21 | Hedgcoth Virgle L | Magnetic recording disk and sputtering process and apparatus for producing same |
US5316864A (en) * | 1985-11-12 | 1994-05-31 | Hedgcoth Virgle L | Sputtered magnetic recording disk |
US5626970A (en) * | 1985-11-12 | 1997-05-06 | Hedgcoth; Virgle L. | Sputtered magnetic thin film recording disk |
US6036824A (en) * | 1985-11-12 | 2000-03-14 | Magnetic Media Development Llc | Magnetic recording disk sputtering process and apparatus |
JPS62273619A (en) * | 1986-05-21 | 1987-11-27 | Hitachi Ltd | Magnetic disk |
JPS6348610A (en) * | 1986-08-15 | 1988-03-01 | Nec Corp | Magnetic recording medium |
JPH0325725A (en) * | 1989-06-23 | 1991-02-04 | Fujitsu Ltd | Magnetic recording medium and production thereof |
JPH03116416A (en) * | 1990-04-27 | 1991-05-17 | Hitachi Ltd | Production of magnetic disk medium |
JPH05765B2 (en) * | 1990-04-27 | 1993-01-06 | Hitachi Ltd | |
JPH05182385A (en) * | 1991-12-28 | 1993-07-23 | Nec Corp | Magnetic disk device |
JPH06342520A (en) * | 1994-01-13 | 1994-12-13 | Fuji Electric Co Ltd | Production of magnetic disk |
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