JPS5718029A - Production of magnetic disk of high recording density - Google Patents

Production of magnetic disk of high recording density

Info

Publication number
JPS5718029A
JPS5718029A JP9075380A JP9075380A JPS5718029A JP S5718029 A JPS5718029 A JP S5718029A JP 9075380 A JP9075380 A JP 9075380A JP 9075380 A JP9075380 A JP 9075380A JP S5718029 A JPS5718029 A JP S5718029A
Authority
JP
Japan
Prior art keywords
film
magnetic disk
production
recording density
high recording
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
JP9075380A
Other languages
Japanese (ja)
Inventor
Yoshio Nakagawa
Atsusuke Takagaki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9075380A priority Critical patent/JPS5718029A/en
Publication of JPS5718029A publication Critical patent/JPS5718029A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/8416—Processes or apparatus specially adapted for manufacturing record carriers coating a support with a magnetic layer by precipitation

Landscapes

  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To reduce the defects including pinholes and the like, by forming an electroplated layer composed of a Ni-P alloy coat on a magnetic disk substrate made of a nonmagnetic substance. CONSTITUTION:A surface treatment film 2 is formed on both surfaces of a disk 1 made of an aluminum alloy by a zinc substituting process, and a copper electroplated film 3 is formed on the film 2. Then an Ni-P alloy film 4 is formed by an electro plating, and the surface of the film 4 is smoothed by a heat treatment and a mechanical working. After this, an iron oxide film 5 is formed on the film 4 by a sputtering process.
JP9075380A 1980-07-04 1980-07-04 Production of magnetic disk of high recording density Pending JPS5718029A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9075380A JPS5718029A (en) 1980-07-04 1980-07-04 Production of magnetic disk of high recording density

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9075380A JPS5718029A (en) 1980-07-04 1980-07-04 Production of magnetic disk of high recording density

Publications (1)

Publication Number Publication Date
JPS5718029A true JPS5718029A (en) 1982-01-29

Family

ID=14007361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9075380A Pending JPS5718029A (en) 1980-07-04 1980-07-04 Production of magnetic disk of high recording density

Country Status (1)

Country Link
JP (1) JPS5718029A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4724188A (en) * 1984-06-07 1988-02-09 C. Uyemura and Co. Magnetic recording medium
US4786564A (en) * 1987-02-25 1988-11-22 Komag, Inc. Method for manufacturing a magnetic disk having reduced bit shift, minimized noise, increased resolution and uniform magnetic characteristics, and the resulting disk
US5153044A (en) * 1987-02-25 1992-10-06 Komag, Inc. Magnetic disk for longitudinal recording comprising an amorphous intermediate layer
WO1994015720A1 (en) * 1993-01-07 1994-07-21 Akashic Memories Corporation Magnetic recording media on non-metallic substrates and methods for their production

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4724188A (en) * 1984-06-07 1988-02-09 C. Uyemura and Co. Magnetic recording medium
US4786564A (en) * 1987-02-25 1988-11-22 Komag, Inc. Method for manufacturing a magnetic disk having reduced bit shift, minimized noise, increased resolution and uniform magnetic characteristics, and the resulting disk
US5153044A (en) * 1987-02-25 1992-10-06 Komag, Inc. Magnetic disk for longitudinal recording comprising an amorphous intermediate layer
WO1994015720A1 (en) * 1993-01-07 1994-07-21 Akashic Memories Corporation Magnetic recording media on non-metallic substrates and methods for their production

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