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DE69120308D1 - Magnetooptischer Aufzeichnungsträger und Verfahren zur Bearbeitung seiner Oberfläche - Google Patents

Magnetooptischer Aufzeichnungsträger und Verfahren zur Bearbeitung seiner Oberfläche

Info

Publication number
DE69120308D1
DE69120308D1 DE69120308T DE69120308T DE69120308D1 DE 69120308 D1 DE69120308 D1 DE 69120308D1 DE 69120308 T DE69120308 T DE 69120308T DE 69120308 T DE69120308 T DE 69120308T DE 69120308 D1 DE69120308 D1 DE 69120308D1
Authority
DE
Germany
Prior art keywords
magneto
processing
recording medium
optical recording
optical
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
DE69120308T
Other languages
English (en)
Other versions
DE69120308T2 (de
Inventor
Junichiro Nakayama
Yoshiteru Murakami
Hiroyuki Katayama
Kenji Ohta
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Publication of DE69120308D1 publication Critical patent/DE69120308D1/de
Application granted granted Critical
Publication of DE69120308T2 publication Critical patent/DE69120308T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/1058—Flying heads
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements
    • 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
    • Y10T428/21—Circular sheet or circular blank
    • Y10T428/218—Aperture containing
    • 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.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • 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]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31935—Ester, halide or nitrile of addition polymer
DE69120308T 1990-02-06 1991-02-06 Magnetooptischer Aufzeichnungsträger und Verfahren zur Bearbeitung seiner Oberfläche Expired - Lifetime DE69120308T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2026477A JP2600004B2 (ja) 1990-02-06 1990-02-06 光磁気記録媒体及びその表面処理方法

Publications (2)

Publication Number Publication Date
DE69120308D1 true DE69120308D1 (de) 1996-07-25
DE69120308T2 DE69120308T2 (de) 1997-01-23

Family

ID=12194585

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69120308T Expired - Lifetime DE69120308T2 (de) 1990-02-06 1991-02-06 Magnetooptischer Aufzeichnungsträger und Verfahren zur Bearbeitung seiner Oberfläche

Country Status (5)

Country Link
US (2) US5328740A (de)
EP (1) EP0441611B1 (de)
JP (1) JP2600004B2 (de)
CA (1) CA2035410C (de)
DE (1) DE69120308T2 (de)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0767457B1 (de) * 1990-01-19 2001-08-29 Sharp Kabushiki Kaisha Vorrichtung zur magnetooptischen Aufzeichnung
US5231613A (en) * 1990-01-19 1993-07-27 Sharp Kabushiki Kaisha Magneto-optical recording device
JP2600004B2 (ja) * 1990-02-06 1997-04-16 シャープ株式会社 光磁気記録媒体及びその表面処理方法
JP3327404B2 (ja) * 1991-09-30 2002-09-24 ソニー株式会社 光磁気ディスクシステム及び光磁気ディスク
JPH06150304A (ja) * 1992-11-02 1994-05-31 Fuji Electric Co Ltd 磁気記録媒体およびその製造方法
EP0833319A3 (de) * 1993-01-21 2002-04-03 Matsushita Electric Industrial Co., Ltd. Plattenförmiges Aufzeichnungsmedium
US5534321A (en) * 1993-05-20 1996-07-09 Corning Incorporated Disk substrate for magnetic memory devices
TW279972B (de) * 1993-06-21 1996-07-01 Komag Inc
KR0148842B1 (ko) * 1993-07-22 1998-10-15 가나이 쯔또무 자기기록매체 및 그의 제조방법과 자기기록 시스템
US5939170A (en) * 1993-12-28 1999-08-17 Hoya Corporation Magnetic recording medium
JP2783181B2 (ja) * 1995-03-08 1998-08-06 日本電気株式会社 固定磁気ディスク装置の製造方法
US6075677A (en) * 1995-07-27 2000-06-13 Seagate Technology, Inc. Method for positioning a read/write head to reduce wear for proximity recording in a magnetic disk storage system
JPH09305966A (ja) * 1996-05-20 1997-11-28 Sony Corp 磁気ディスク及び磁気ディスク装置
KR100467996B1 (ko) * 1996-08-23 2005-05-24 소니 가부시끼 가이샤 디스크매체용기판및디스크장치
KR20000036175A (ko) * 1996-09-17 2000-06-26 알프레드 엘. 미첼슨 텍스처화된 표면 및 이의 제조방법
US6118632A (en) * 1997-02-12 2000-09-12 International Business Machines Corporation Magnetic disk stack having laser-bump identifiers on magnetic disks
US6177175B1 (en) * 1997-10-16 2001-01-23 Canon Kabushiki Kaisha Magneto-optical medium utilizing domain wall displacement
US6154438A (en) * 1998-02-06 2000-11-28 Seagate Technology, Inc. Storage disk having surface variations that vary minimally in height relative to a datum
US6335080B1 (en) * 1999-01-04 2002-01-01 Seagate Technology Llc Magnetic disk media and disk drives utilizing polymeric disk substrates
US6335063B1 (en) 1999-01-08 2002-01-01 Seagate Technology Llc Surface treatment of substrates for low-glide height magneto-optical media
SG91250A1 (en) * 1999-02-17 2002-09-17 Komag Inc Burnishing head

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204111A (en) * 1981-06-10 1982-12-14 Hitachi Ltd Forming method for magnetic thin-film pattern
US4861699A (en) * 1983-03-16 1989-08-29 U.S. Philips Corporation Method of making a master disk used in making optical readable information disks
JPH0610886B2 (ja) * 1984-11-01 1994-02-09 株式会社リコー 光情報記録媒体
JPS61117746A (ja) * 1984-11-13 1986-06-05 Hitachi Ltd 光デイスク基板
US4698251A (en) * 1985-01-22 1987-10-06 Victor Company Of Japan, Limited Magnetic recording medium and method of producing the same
US4737877A (en) * 1986-05-05 1988-04-12 International Business Machines Corporation Structure to provide optical and capacitive contrast on magnetic recording disk
JPS62262227A (ja) * 1986-05-08 1987-11-14 Seiko Epson Corp 磁気記録媒体用下地基板の製造方法
JPS6334723A (ja) * 1986-07-29 1988-02-15 Hitachi Metals Ltd 磁気記録媒体
DE3629582A1 (de) * 1986-08-30 1988-03-03 Basf Ag Verfahren zur oberflaechenbearbeitung scheibenfoermiger vernickelter aluminiumsubstrate
US4917970A (en) * 1988-02-01 1990-04-17 Minnesota Mining & Manufacturing Company Magneto optic recording medium with silicon carbide dielectric
US4940618A (en) * 1988-07-30 1990-07-10 Taiyo Yuden Company, Ltd. Optical information recording medium
JP2699506B2 (ja) * 1988-12-28 1998-01-19 カシオ計算機株式会社 多値メモリ素子
JP2816472B2 (ja) * 1989-04-28 1998-10-27 ティーディーケイ株式会社 磁気記録媒体
JP2601553B2 (ja) * 1989-12-28 1997-04-16 シャープ株式会社 光磁気記録再生装置
JP2600004B2 (ja) * 1990-02-06 1997-04-16 シャープ株式会社 光磁気記録媒体及びその表面処理方法

Also Published As

Publication number Publication date
EP0441611A1 (de) 1991-08-14
US5328740A (en) 1994-07-12
JP2600004B2 (ja) 1997-04-16
CA2035410A1 (en) 1991-08-07
DE69120308T2 (de) 1997-01-23
JPH03230345A (ja) 1991-10-14
CA2035410C (en) 1997-09-30
EP0441611B1 (de) 1996-06-19
US5427833A (en) 1995-06-27

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Legal Events

Date Code Title Description
8328 Change in the person/name/address of the agent

Free format text: PATENTANWAELTE MUELLER & HOFFMANN, 81667 MUENCHEN

8364 No opposition during term of opposition