CA1251360A - Magnetic recording medium and production processes thereof - Google Patents

Magnetic recording medium and production processes thereof

Info

Publication number
CA1251360A
CA1251360A CA000456920A CA456920A CA1251360A CA 1251360 A CA1251360 A CA 1251360A CA 000456920 A CA000456920 A CA 000456920A CA 456920 A CA456920 A CA 456920A CA 1251360 A CA1251360 A CA 1251360A
Authority
CA
Canada
Prior art keywords
magnetic recording
coating
recording medium
protective coating
projections
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
CA000456920A
Other languages
English (en)
French (fr)
Inventor
Yusaku Sakai
Yoshito Kitamoto
Shinji Ohtaki
Yasushi Tamaki
Hikaru Nagai
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
Application granted granted Critical
Publication of CA1251360A publication Critical patent/CA1251360A/en
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
    • G11B5/72—Protective coatings, e.g. anti-static or antifriction
    • G11B5/726—Two or more protective coatings
    • G11B5/7262—Inorganic protective coating
    • 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
    • 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.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24612—Composite web or sheet
    • 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.]
    • Y10T428/24628—Nonplanar uniform thickness material
    • Y10T428/24669—Aligned or parallel nonplanarities

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Magnetic Record Carriers (AREA)
CA000456920A 1983-06-22 1984-06-19 Magnetic recording medium and production processes thereof Expired CA1251360A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP58-113517 1983-06-22
JP58113517A JPS605423A (ja) 1983-06-22 1983-06-22 連続磁性膜型磁気記録媒体

Publications (1)

Publication Number Publication Date
CA1251360A true CA1251360A (en) 1989-03-21

Family

ID=14614344

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000456920A Expired CA1251360A (en) 1983-06-22 1984-06-19 Magnetic recording medium and production processes thereof

Country Status (6)

Country Link
US (2) US4664963A (2)
EP (1) EP0130063B1 (2)
JP (1) JPS605423A (2)
AU (1) AU551438B2 (2)
CA (1) CA1251360A (2)
DE (1) DE3480239D1 (2)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6150211A (ja) * 1984-08-20 1986-03-12 Res Dev Corp Of Japan 垂直磁気記録媒体およびその製法
US4717627A (en) * 1986-12-04 1988-01-05 The United States Of America As Represented By The United States Department Of Energy Dynamic high pressure process for fabricating superconducting and permanent magnetic materials
US4762754A (en) * 1986-12-04 1988-08-09 The United States Of America As Represented By The United States Department Of Energy Dynamic high pressure process for fabricating superconducting and permanent magnetic materials
JPH01182920A (ja) * 1988-01-13 1989-07-20 Hitachi Ltd 磁気記録媒体
JPH067410B2 (ja) * 1989-10-02 1994-01-26 伊藤忠商事株式会社 記録ディスク基板及び磁気記録ディスクの製造方法
US5285343A (en) * 1989-10-13 1994-02-08 Hitachi, Ltd. Magnetic disk with surface protective layer having convex portions and magnetic disk apparatus including such a magnetic disk
US5504646A (en) 1989-10-13 1996-04-02 Hitachi, Ltd. Magnetic disk including protective layer having surface with protusions and magnetic disk apparatus including the magnetic disk
US5316844A (en) * 1990-04-16 1994-05-31 Hoya Electronics Corporation Magnetic recording medium comprising an aluminum alloy substrate, now magnetic underlayers, magnetic layer, protective layer, particulate containing protective layer and lubricant layer
US5656349A (en) * 1990-07-04 1997-08-12 Hitachi, Ltd. Magnetic disk, method of manufacturing the same and magnetic disk apparatus including the magnetic disk
WO1993012520A1 (en) * 1991-12-17 1993-06-24 Certus Magnetics Magnetic disk medium with designed textured surfaces and controlled surface roughness and method of providing same
US5470447A (en) * 1992-08-19 1995-11-28 Stormedia, Inc. Method for applying a protective coating on a magnetic recording head
JP2717048B2 (ja) * 1992-11-12 1998-02-18 株式会社日立製作所 磁気ディスク製造方法および製造装置
US5635037A (en) * 1993-08-02 1997-06-03 Industrial Technology Research Institute Method of texture by in-situ masking and etching for thin film magnetic recording medium
US5768076A (en) * 1993-11-10 1998-06-16 International Business Machines Corporation Magnetic recording disk having a laser-textured surface
US5841608A (en) * 1994-08-30 1998-11-24 Fujitsu Limited Head slider with projections arranged on rails thereof
JPH08249637A (ja) * 1995-03-07 1996-09-27 Hitachi Ltd 磁気ディスクおよびその製造方法ならびに磁気ディスク装置
JP2738394B2 (ja) * 1996-12-16 1998-04-08 株式会社日立製作所 磁気ディスク
US6205002B1 (en) 1997-06-13 2001-03-20 International Business Machines Corporation Disk drive with textured slider contact region
US6835317B2 (en) * 1997-11-04 2004-12-28 Ebara Corporation Method of making substrate with micro-protrusions or micro-cavities
US6673429B1 (en) 2000-07-25 2004-01-06 Seagate Technology Llc Magnetic recording media with a multiple-layer lubricant
US7060377B2 (en) * 2003-10-20 2006-06-13 Seagate Technology Lubricant film containing additives for advanced tribological performance of magnetic storage medium
US7301726B1 (en) * 2004-11-04 2007-11-27 Komag, Inc. Banded LZT CSS zone
US8793866B1 (en) * 2007-12-19 2014-08-05 Western Digital (Fremont), Llc Method for providing a perpendicular magnetic recording head
US8166632B1 (en) 2008-03-28 2012-05-01 Western Digital (Fremont), Llc Method for providing a perpendicular magnetic recording (PMR) transducer
JP2012003519A (ja) * 2010-06-17 2012-01-05 Hitachi Omron Terminal Solutions Corp 紙幣取扱装置

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3715793A (en) * 1970-05-04 1973-02-13 Honeywell Inc Plated super-coat and electrolyte
US4154875A (en) * 1975-07-01 1979-05-15 Nippon Electric Co., Ltd. Process for manufacturing a magnetic record member
JPS5255603A (en) * 1975-10-31 1977-05-07 Nec Corp Magnetic memory element and production of same
US4152487A (en) * 1976-12-17 1979-05-01 Nippon Electric Co., Ltd. Magnetic record member
US4307156A (en) * 1978-06-13 1981-12-22 Nippon Electric Co., Ltd. Magnetic record member
JPS5584045A (en) * 1978-12-19 1980-06-24 Nec Corp Magnetic memory substance and its manufacture
JPS55117740A (en) * 1979-03-05 1980-09-10 Fujitsu Ltd Manufacture of magnetic recording medium
JPS55117741A (en) * 1979-03-05 1980-09-10 Fujitsu Ltd Manufacture of magnetic recording medium
JPS563428A (en) * 1979-06-20 1981-01-14 Fuji Photo Film Co Ltd Magnetic recording medium
JPS5845089B2 (ja) * 1979-07-31 1983-10-07 富士通株式会社 磁気デイスクの保護皮膜生成方法
JPS5622219A (en) * 1979-07-31 1981-03-02 Fujitsu Ltd Manufacture of magnetic recording medium
JPS5939811B2 (ja) * 1980-03-18 1984-09-26 日立マクセル株式会社 磁気記録媒体の製造方法
JPS578926A (en) * 1980-06-17 1982-01-18 Fuji Photo Film Co Ltd Magnetic recording body
JPS5720925A (en) * 1980-07-09 1982-02-03 Nec Corp Magnetic disk
JPS58185029A (ja) * 1982-04-23 1983-10-28 Nippon Telegr & Teleph Corp <Ntt> 磁気デイスク媒体
US4425404A (en) * 1982-04-30 1984-01-10 Matsushita Electric Industrial Co., Ltd. Magnetic recording medium
JPS58224438A (ja) * 1982-06-23 1983-12-26 Tdk Corp 磁気記録媒体
US4540618A (en) * 1982-08-12 1985-09-10 Matsushita Electric Industrial Co., Ltd. Magnetic recording medium

Also Published As

Publication number Publication date
EP0130063A3 (en) 1986-10-01
JPH0312372B2 (2) 1991-02-20
EP0130063A2 (en) 1985-01-02
EP0130063B1 (en) 1989-10-18
JPS605423A (ja) 1985-01-12
US4664963A (en) 1987-05-12
AU551438B2 (en) 1986-05-01
DE3480239D1 (en) 1989-11-23
AU2972184A (en) 1985-01-03
US4675075A (en) 1987-06-23

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Legal Events

Date Code Title Description
MKEX Expiry
MKEX Expiry

Effective date: 20060321