JPS5622219A - Manufacture of magnetic recording medium - Google Patents

Manufacture of magnetic recording medium

Info

Publication number
JPS5622219A
JPS5622219A JP9764279A JP9764279A JPS5622219A JP S5622219 A JPS5622219 A JP S5622219A JP 9764279 A JP9764279 A JP 9764279A JP 9764279 A JP9764279 A JP 9764279A JP S5622219 A JPS5622219 A JP S5622219A
Authority
JP
Japan
Prior art keywords
disc
coated film
magnetic
magnetic coated
lubricant
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
JP9764279A
Other languages
Japanese (ja)
Inventor
Toshio Kumai
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 JP9764279A priority Critical patent/JPS5622219A/en
Publication of JPS5622219A publication Critical patent/JPS5622219A/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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
    • G11B5/82—Disk carriers

Landscapes

  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

PURPOSE: To prevent the abrasion, damage and others of the magnetic coated film and also increase the durability, by forming the minute unevenness in a uniform and easy way with the etching liquid on the surface of the magnetic coated film of the magnetic disc for the purpose of holding the lubricant.
CONSTITUTION: For the disc of the contact start-stop (CSS) system, the surface of the magnetic coated film is soaked about 1W10 minutes into the etching liquid of 5W10% nitric acid solution, 1W5% hydrochloric acid, 5W20% acetic acid solution and others to give the etching mainly to the inorganic materials (γ-Fe2O3, Al2O3, ZnO, etc.) of the surface layer of the magnetic coated film. Thus the uniform unevenness is formed. Then the carbon fluoride-group lubricating oil or the like is spin-coated on the disc surface in a depth of several hunderds Å. After this, the head treatment of about 200°C is applied to make the lubricant impregnate sufficiently into the hollowed area. In such way, a disc having a small extent of the S/N reduction, the bit error and other faults can be obtained along with the resistance to the CSS frequency of 50,000 or more.
COPYRIGHT: (C)1981,JPO&Japio
JP9764279A 1979-07-31 1979-07-31 Manufacture of magnetic recording medium Pending JPS5622219A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9764279A JPS5622219A (en) 1979-07-31 1979-07-31 Manufacture of magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9764279A JPS5622219A (en) 1979-07-31 1979-07-31 Manufacture of magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5622219A true JPS5622219A (en) 1981-03-02

Family

ID=14197773

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9764279A Pending JPS5622219A (en) 1979-07-31 1979-07-31 Manufacture of magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5622219A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS605423A (en) * 1983-06-22 1985-01-12 Fujitsu Ltd Magnetic recording medium and its production
JPS61110337A (en) * 1984-11-02 1986-05-28 Anelva Corp Vertical magnetic recording medium
WO1999049457A1 (en) * 1998-03-20 1999-09-30 Matsushita Electric Industrial Co., Ltd. Master information support
US6347016B1 (en) 1996-07-22 2002-02-12 Matsushita Electric Industrial Co., Ltd. Master information carrier, process for producing the carrier, and method and apparatus for recording master information signal on magnetic recording medium by using the carrier
US6611388B1 (en) 1998-03-23 2003-08-26 Matsushita Electric Industrial Co., Ltd. Master information magnetic recorder
US6714367B1 (en) 1998-10-29 2004-03-30 Matsushita Electric Industrial Co., Ltd. Master information medium and method of master information recording

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS605423A (en) * 1983-06-22 1985-01-12 Fujitsu Ltd Magnetic recording medium and its production
JPH0312372B2 (en) * 1983-06-22 1991-02-20 Fujitsu Ltd
JPS61110337A (en) * 1984-11-02 1986-05-28 Anelva Corp Vertical magnetic recording medium
US6606208B2 (en) 1996-07-22 2003-08-12 Matsushita Electric Industrial Co., Ltd. Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier
US6347016B1 (en) 1996-07-22 2002-02-12 Matsushita Electric Industrial Co., Ltd. Master information carrier, process for producing the carrier, and method and apparatus for recording master information signal on magnetic recording medium by using the carrier
US6567227B2 (en) 1996-07-22 2003-05-20 Matsushita Electric Industrial Co., Ltd. Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier
US6587290B2 (en) 1996-07-22 2003-07-01 Matsushita Electric Industrial Co., Ltd. Master information carrier, method for producing the carrier, and method apparatus for writing information into magnetic record medium using the carrier
US6590727B2 (en) 1996-07-22 2003-07-08 Matsushita Electric Industrial Co., Ltd. Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier
US6606209B2 (en) 1996-07-22 2003-08-12 Matsushita Electric Industrial Co., Ltd. Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier
US6961196B2 (en) 1996-07-22 2005-11-01 Matsushita Electric Industrial Co., Ltd. Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier
WO1999049457A1 (en) * 1998-03-20 1999-09-30 Matsushita Electric Industrial Co., Ltd. Master information support
US6858328B1 (en) 1998-03-20 2005-02-22 Matsushita Electric Industrial Co., Ltd. Master information support
US6611388B1 (en) 1998-03-23 2003-08-26 Matsushita Electric Industrial Co., Ltd. Master information magnetic recorder
US6714367B1 (en) 1998-10-29 2004-03-30 Matsushita Electric Industrial Co., Ltd. Master information medium and method of master information recording

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