JPS5720926A - Manufacture of magnetic disk - Google Patents

Manufacture of magnetic disk

Info

Publication number
JPS5720926A
JPS5720926A JP9393280A JP9393280A JPS5720926A JP S5720926 A JPS5720926 A JP S5720926A JP 9393280 A JP9393280 A JP 9393280A JP 9393280 A JP9393280 A JP 9393280A JP S5720926 A JPS5720926 A JP S5720926A
Authority
JP
Japan
Prior art keywords
fillers
base plate
magnetic material
magnetic
project
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
JP9393280A
Other languages
Japanese (ja)
Inventor
Yuichi Otani
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 JP9393280A priority Critical patent/JPS5720926A/en
Publication of JPS5720926A publication Critical patent/JPS5720926A/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
    • G11B5/842—Coating a support with a liquid magnetic dispersion

Abstract

PURPOSE:To obtain a high-precision, long-life magnetic disk which has mixed filters burided deep in a coating film and projecting uniformly, by coating an aluminum base plate with a magnetic material, by curing it after vibrating the base plate in a surface direction, and by polishing and finishing it. CONSTITUTION:An aluminum base plate 1 is applied with a magnetic material consisting of fillers 2, magnetic powder 3 and resin 4 and, while the positions of the fillers 2 are not fixed, is vibrated vertically to give one-side large interial force to the magnetic material. In this case, the base plate is vibrated up fast and down slow to sink the fillers 2 to the bottom. The surface is polished and finished until heads of the fillters 2 project. Since the grain size of each filter is a little bit greater than the final film thickness, the project height of the filler is extremely small. As the fillers 2, alumina single crystal having high hardness is used and on projected parts of the fillers, a magnetic head is allowed to contact, start and stop.
JP9393280A 1980-07-11 1980-07-11 Manufacture of magnetic disk Pending JPS5720926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9393280A JPS5720926A (en) 1980-07-11 1980-07-11 Manufacture of magnetic disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9393280A JPS5720926A (en) 1980-07-11 1980-07-11 Manufacture of magnetic disk

Publications (1)

Publication Number Publication Date
JPS5720926A true JPS5720926A (en) 1982-02-03

Family

ID=14096201

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9393280A Pending JPS5720926A (en) 1980-07-11 1980-07-11 Manufacture of magnetic disk

Country Status (1)

Country Link
JP (1) JPS5720926A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0684597A1 (en) * 1993-12-01 1995-11-29 TDK Corporation Production method of magnetic recording medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5114006A (en) * 1974-06-17 1976-02-04 Dow Chemical Co

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5114006A (en) * 1974-06-17 1976-02-04 Dow Chemical Co

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0684597A1 (en) * 1993-12-01 1995-11-29 TDK Corporation Production method of magnetic recording medium
EP0684597B1 (en) * 1993-12-01 2003-07-09 TDK Corporation Production method of magnetic recording medium

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