JPS53123906A - Magnetic disc - Google Patents

Magnetic disc

Info

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
Application number
JP3869877A
Other languages
Japanese (ja)
Inventor
Masaki Shinohara
Takehiko Sato
Kenichi Ito
Susumu Kawakami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu 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
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP3869877A priority Critical patent/JPS53123906A/en
Publication of JPS53123906A publication Critical patent/JPS53123906A/en
Pending legal-status Critical Current

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
JP3869877A 1977-04-05 1977-04-05 Magnetic disc Pending JPS53123906A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (20)

* Cited by examiner, † Cited by third party
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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