DE3173689D1 - Method of producing a magnetic recording medium - Google Patents

Method of producing a magnetic recording medium

Info

Publication number
DE3173689D1
DE3173689D1 DE8181300904T DE3173689T DE3173689D1 DE 3173689 D1 DE3173689 D1 DE 3173689D1 DE 8181300904 T DE8181300904 T DE 8181300904T DE 3173689 T DE3173689 T DE 3173689T DE 3173689 D1 DE3173689 D1 DE 3173689D1
Authority
DE
Germany
Prior art keywords
producing
recording medium
magnetic recording
magnetic
medium
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.)
Expired
Application number
DE8181300904T
Other languages
English (en)
Inventor
Ryuji Sugita
Toshiaki Kunieda
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27286656&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3173689(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from JP2961680A external-priority patent/JPS56127934A/ja
Priority claimed from JP4937480A external-priority patent/JPS56145527A/ja
Priority claimed from JP7954880A external-priority patent/JPS6037531B2/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Application granted granted Critical
Publication of DE3173689D1 publication Critical patent/DE3173689D1/de
Expired 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
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
    • G11B5/656—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing Co
    • 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
    • G11B5/851—Coating a support with a magnetic layer by sputtering
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
    • H01F41/20—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates by evaporation
DE8181300904T 1980-03-07 1981-03-04 Method of producing a magnetic recording medium Expired DE3173689D1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2961680A JPS56127934A (en) 1980-03-07 1980-03-07 Production of magnetic recording medium
JP4937480A JPS56145527A (en) 1980-04-14 1980-04-14 Production of magnetic recording medium
JP7954880A JPS6037531B2 (ja) 1980-06-11 1980-06-11 磁気記録媒体の製造方法

Publications (1)

Publication Number Publication Date
DE3173689D1 true DE3173689D1 (en) 1986-03-20

Family

ID=27286656

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8181300904T Expired DE3173689D1 (en) 1980-03-07 1981-03-04 Method of producing a magnetic recording medium

Country Status (3)

Country Link
US (1) US4399013A (de)
EP (1) EP0035870B2 (de)
DE (1) DE3173689D1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57149706A (en) * 1981-03-12 1982-09-16 Tdk Corp Magnetic recording medium
US4477488A (en) * 1982-03-16 1984-10-16 Matsushita Electric Industrial Co., Ltd. Method of manufacturing magnetic recording medium
JPS5916970A (ja) * 1982-07-15 1984-01-28 Citizen Watch Co Ltd イオンプレ−テイングにおける蒸発材の蒸発量検知及び制御方法
US4478874A (en) * 1983-12-09 1984-10-23 Cosden Technology, Inc. Methods for improving the gas barrier properties of polymeric containers
US4938859A (en) * 1984-07-31 1990-07-03 Vacuum Optics Corporation Of Japan Ion bombardment device with high frequency
US4554217A (en) * 1984-09-20 1985-11-19 Verbatim Corporation Process for creating wear and corrosion resistant film for magnetic recording media
CH664163A5 (de) * 1985-03-01 1988-02-15 Balzers Hochvakuum Verfahren zum reaktiven aufdampfen von schichten aus oxiden, nitriden, oxynitriden und karbiden.
US5858456A (en) * 1991-02-06 1999-01-12 Applied Vacuum Technologies 1 Ab Method for metal coating discrete objects by vapor deposition
US5325019A (en) * 1992-08-21 1994-06-28 Sematech, Inc. Control of plasma process by use of harmonic frequency components of voltage and current
US5885930A (en) * 1997-07-30 1999-03-23 Eastman Kodak Company Thin wear resistant and heat conductive slip layer for a reusable thermal dye donor belt
EP1506760A1 (de) * 2003-08-15 2005-02-16 Pride Mobility Products, Corporation Hub- und Kippvorrichtung für einen Rollstuhlsitz unter Beibehaltung vom konstanten Schwerpunkt

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1297936A (de) * 1969-02-22 1972-11-29
DE2347540A1 (de) * 1972-09-25 1974-04-11 Ibm Deutschland Verfahren zur herstellung von magnetspeicherplatten
US3962988A (en) * 1973-03-05 1976-06-15 Yoichi Murayama, Nippon Electric Varian Ltd. Ion-plating apparatus having an h.f. electrode for providing an h.f. glow discharge region
US4091138A (en) * 1975-02-12 1978-05-23 Sumitomo Bakelite Company Limited Insulating film, sheet, or plate material with metallic coating and method for manufacturing same
JPS51149008A (en) * 1975-05-23 1976-12-21 Fuji Photo Film Co Ltd Magnetic recording medium manufacturing method
GB1596385A (en) * 1976-12-29 1981-08-26 Matsushita Electric Ind Co Ltd Methods and apparatus for manufacturing magnetic recording media
US4277809A (en) * 1979-09-26 1981-07-07 Memorex Corporation Apparatus for recording magnetic impulses perpendicular to the surface of a recording medium

Also Published As

Publication number Publication date
EP0035870B2 (de) 1991-12-27
EP0035870B1 (de) 1986-02-05
EP0035870A1 (de) 1981-09-16
US4399013A (en) 1983-08-16

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8366 Restricted maintained after opposition proceedings
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee