JPH0576696B2 - - Google Patents

Info

Publication number
JPH0576696B2
JPH0576696B2 JP59276496A JP27649684A JPH0576696B2 JP H0576696 B2 JPH0576696 B2 JP H0576696B2 JP 59276496 A JP59276496 A JP 59276496A JP 27649684 A JP27649684 A JP 27649684A JP H0576696 B2 JPH0576696 B2 JP H0576696B2
Authority
JP
Japan
Prior art keywords
film
magnetic
magnetic recording
magnetic layer
base film
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 - Lifetime
Application number
JP59276496A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61158025A (ja
Inventor
Hirotsugu Takagi
Akira Niimi
Kenji Suzuki
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP59276496A priority Critical patent/JPS61158025A/ja
Priority to CA000498688A priority patent/CA1288011C/en
Priority to US06/813,853 priority patent/US4673612A/en
Publication of JPS61158025A publication Critical patent/JPS61158025A/ja
Publication of JPH0576696B2 publication Critical patent/JPH0576696B2/ja
Granted 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
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/7368—Non-polymeric layer under the lowermost magnetic recording layer
    • G11B5/7373—Non-magnetic single underlayer comprising chromium
    • 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
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73923—Organic polymer substrates
    • G11B5/73937—Substrates having an organic polymer comprising a ring structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9265—Special properties
    • Y10S428/928—Magnetic property
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12465—All metal or with adjacent metals having magnetic properties, or preformed fiber orientation coordinate with shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y10T428/24967—Absolute thicknesses specified
    • Y10T428/24975—No layer or component greater than 5 mils thick
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31721—Of polyimide

Landscapes

  • Magnetic Record Carriers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
JP59276496A 1984-12-28 1984-12-28 磁気記録媒体 Granted JPS61158025A (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP59276496A JPS61158025A (ja) 1984-12-28 1984-12-28 磁気記録媒体
CA000498688A CA1288011C (en) 1984-12-28 1985-12-27 Magnetic recording medium
US06/813,853 US4673612A (en) 1984-12-28 1985-12-27 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59276496A JPS61158025A (ja) 1984-12-28 1984-12-28 磁気記録媒体

Publications (2)

Publication Number Publication Date
JPS61158025A JPS61158025A (ja) 1986-07-17
JPH0576696B2 true JPH0576696B2 (en, 2012) 1993-10-25

Family

ID=17570269

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59276496A Granted JPS61158025A (ja) 1984-12-28 1984-12-28 磁気記録媒体

Country Status (3)

Country Link
US (1) US4673612A (en, 2012)
JP (1) JPS61158025A (en, 2012)
CA (1) CA1288011C (en, 2012)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62229519A (ja) * 1986-03-29 1987-10-08 Canon Inc 磁気記録媒体
JPH0632351B2 (ja) * 1986-05-30 1994-04-27 日東電工株式会社 フレキシブルプリント基板
JP2847701B2 (ja) * 1986-11-29 1999-01-20 鐘淵化学工業株式会社 熱的寸法安定性にすぐれたポリアミド酸及びそれからなるポリイミドの製造方法
JP2573595B2 (ja) * 1987-03-09 1997-01-22 鐘淵化学工業株式会社 ポリイミド膜
DE3880202T2 (de) * 1987-06-08 1993-08-05 Esselte Meto Int Gmbh Magnetische vorrichtungen.
JPH01166330A (ja) * 1987-12-23 1989-06-30 Canon Inc 金属薄膜型磁気記録媒体の製造方法
JP2002367138A (ja) * 2001-06-07 2002-12-20 Fujitsu Ltd 磁気情報記録媒体
US6956098B2 (en) * 2002-09-20 2005-10-18 E. I. Du Pont De Nemours And Company High modulus polyimide compositions useful as dielectric substrates for electronics applications, and methods relating thereto

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57134907A (en) * 1981-02-13 1982-08-20 Fuji Photo Film Co Ltd Magnetic recording medium
JPS58145419A (ja) * 1982-02-23 1983-08-30 Toray Ind Inc 芳香族ポリイミドフイルムの製造方法
FR2523005A1 (fr) * 1982-03-08 1983-09-16 Air Liquide Procede et installation de coulee d'un metal non ferreux en lingotiere
JPS5968815A (ja) * 1982-10-12 1984-04-18 Sony Corp 磁気記録媒体
JPS5979426A (ja) * 1982-10-29 1984-05-08 Tdk Corp 磁気記録媒体
JPS59198532A (ja) * 1983-04-25 1984-11-10 Fuji Photo Film Co Ltd 磁気記録媒体
JPS6066317A (ja) * 1983-09-20 1985-04-16 Tdk Corp 磁気記録媒体
JPS60129920A (ja) * 1983-12-16 1985-07-11 Hitachi Ltd 磁気記録媒体
JPS60221427A (ja) * 1984-04-17 1985-11-06 Hitachi Chem Co Ltd 複合体

Also Published As

Publication number Publication date
US4673612A (en) 1987-06-16
JPS61158025A (ja) 1986-07-17
CA1288011C (en) 1991-08-27

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