HK71396A - Magnetic data storage disk with low intrinsic media noise - Google Patents

Magnetic data storage disk with low intrinsic media noise

Info

Publication number
HK71396A
HK71396A HK71396A HK71396A HK71396A HK 71396 A HK71396 A HK 71396A HK 71396 A HK71396 A HK 71396A HK 71396 A HK71396 A HK 71396A HK 71396 A HK71396 A HK 71396A
Authority
HK
Hong Kong
Prior art keywords
data storage
magnetic data
storage disk
low intrinsic
media noise
Prior art date
Application number
HK71396A
Other languages
English (en)
Inventor
Richard Henry Ahlert
James Kent Howard
Steven Eugene Lambert
Ian Lewis Sanders
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Publication of HK71396A publication Critical patent/HK71396A/xx

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
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/676—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer
    • G11B5/678—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer having three or more magnetic layers
    • 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
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/676—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer
    • 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
    • Y10S428/923—Physical dimension
    • Y10S428/924—Composite
    • Y10S428/926—Thickness of individual layer specified
    • 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
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12632—Four or more distinct components with alternate recurrence of each type component
    • 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
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
HK71396A 1989-03-16 1996-04-25 Magnetic data storage disk with low intrinsic media noise HK71396A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/324,374 US5051288A (en) 1989-03-16 1989-03-16 Thin film magnetic recording disk comprising alternating layers of a CoNi or CoPt alloy and a non-magnetic spacer layer

Publications (1)

Publication Number Publication Date
HK71396A true HK71396A (en) 1996-05-03

Family

ID=23263322

Family Applications (1)

Application Number Title Priority Date Filing Date
HK71396A HK71396A (en) 1989-03-16 1996-04-25 Magnetic data storage disk with low intrinsic media noise

Country Status (5)

Country Link
US (1) US5051288A (ja)
EP (1) EP0388088B1 (ja)
JP (2) JP3041702B2 (ja)
DE (1) DE69023156T2 (ja)
HK (1) HK71396A (ja)

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US5587235A (en) * 1993-02-19 1996-12-24 Hitachi, Ltd. Magnetic recording medium and magnetic recording apparatus
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US5569533A (en) * 1994-03-14 1996-10-29 Hmt Technology Corporation Thin-film medium with sublayer
US5900324A (en) * 1994-10-27 1999-05-04 Hoya Corporation Magnetic recording media, methods for producing the same and magnetic recorders
SG38900A1 (en) * 1994-12-19 1997-04-17 Hoya Corp Method of manufacturing magnetic recording medium
US5830569A (en) * 1995-09-12 1998-11-03 Kabushiki Kaisha Toshiba Magnetic recording medium containing CoPtO-based alloy magnetic film
US5824409A (en) * 1995-11-13 1998-10-20 Board Of Regents High coercivity longitudinal recording media and method for its preparation
JPH09198641A (ja) * 1996-01-12 1997-07-31 Fuji Electric Co Ltd 磁気記録媒体
US6077586A (en) * 1997-07-15 2000-06-20 International Business Machines Corporation Laminated thin film disk for longitudinal recording
US6150015A (en) 1997-12-04 2000-11-21 Komag, Incorporated Ultra-thin nucleation layer for magnetic thin film media and the method for manufacturing the same
US6261681B1 (en) * 1998-03-20 2001-07-17 Asahi Komag Co., Ltd. Magnetic recording medium
US6689495B1 (en) 1999-06-08 2004-02-10 Fujitsu Limited Magnetic recording medium and magnetic storage apparatus
US6645646B1 (en) 1999-06-08 2003-11-11 Fujitsu Limited Magnetic recording medium and magnetic storage apparatus
US6753101B1 (en) 1999-06-08 2004-06-22 Fujitsu Limited Magnetic recording medium, magnetic storage apparatus, recording method and method of producing magnetic recording medium
US6602612B2 (en) 1999-06-08 2003-08-05 Fujitsu Limited Magnetic recording medium and magnetic storage apparatus
US6821652B1 (en) 1999-06-08 2004-11-23 Fujitsu Limited Magnetic recording medium and magnetic storage apparatus
US6372330B1 (en) 1999-10-08 2002-04-16 International Business Machines Corporation Laminated magnetic recording media with antiferromagnetically coupled layers as the individual magnetic layers in the laminate
US6280813B1 (en) 1999-10-08 2001-08-28 International Business Machines Corporation Magnetic recording media with antiferromagnetically coupled ferromagnetic films as the recording layer
US6773834B2 (en) 1999-10-08 2004-08-10 Hitachi Global Storage Technologies Netherlands B.V. Laminated magnetic recording media with antiferromagnetically coupled layer as one of the individual magnetic layers in the laminate
US7036739B1 (en) 1999-10-23 2006-05-02 Ultracard, Inc. Data storage device apparatus and method for using same
US7487908B1 (en) 1999-10-23 2009-02-10 Ultracard, Inc. Article having an embedded accessible storage member, apparatus and method for using same
US6645614B1 (en) 2000-07-25 2003-11-11 Seagate Technology Llc Magnetic recording media having enhanced coupling between magnetic layers
US6969006B1 (en) 2000-09-15 2005-11-29 Ultracard, Inc. Rotable portable card having a data storage device, apparatus and method for using same
US6730420B1 (en) 2000-10-31 2004-05-04 Komag, Inc. Magnetic thin film recording media having extremely low noise and high thermal stability
EP1863016B1 (en) 2000-11-29 2009-09-16 Fujitsu Limited Magnetic recording medium and magnetic storage apparatus
US6955857B2 (en) 2000-12-29 2005-10-18 Seagate Technology Llc Exchange decoupled cobalt/noble metal perpendicular recording media
JP3749460B2 (ja) 2001-09-07 2006-03-01 富士通株式会社 磁気記録媒体及びこれを用いた磁気記憶装置
US6773556B1 (en) 2001-10-18 2004-08-10 Seagate Technology Llc Method for energy barrier equalization of magnetic recording media and media obtained thereby
US6852426B1 (en) 2001-12-20 2005-02-08 Seagate Technology Llc Hybrid anti-ferromagnetically coupled and laminated magnetic media
US6899959B2 (en) * 2002-02-12 2005-05-31 Komag, Inc. Magnetic media with improved exchange coupling
US6723450B2 (en) 2002-03-19 2004-04-20 Hitachi Global Storage Technologies Netherlands B.V. Magnetic recording medium with antiparallel coupled ferromagnetic films as the recording layer
US6811890B1 (en) 2002-04-08 2004-11-02 Maxtor Corporation Intermediate layer for antiferromagnetically exchange coupled media
US7314675B1 (en) 2003-01-30 2008-01-01 Seagate Technology Llc Magnetic media with high Ms magnetic layer
US7279240B2 (en) * 2003-01-30 2007-10-09 Seagate Technology Llc Laminated perpendicular magnetic recording media with uncorrelated grains
US20040166371A1 (en) * 2003-02-26 2004-08-26 Berger Andreas Klaus Dieter Magnetic recording media with write-assist layer
US7592079B1 (en) 2003-07-03 2009-09-22 Seagate Technology Llc Method to improve remanence-squareness-thickness-product and coercivity profiles in magnetic media
US6963461B2 (en) * 2003-07-15 2005-11-08 Hitachi Global Storage Technologies Netherlands B.V. Method for magnetic recording on laminated media with improved media signal-to-noise ratio
US6989952B2 (en) * 2003-07-15 2006-01-24 Hitachi Global Storage Technologies Netherlands B.V. Magnetic recording disk drive with laminated media and improved media signal-to-noise ratio
US6939626B2 (en) * 2003-07-24 2005-09-06 Hitachi Global Storage Technologies Netherlands B.V. Magnetic anisotropy adjusted laminated magnetic thin films for magnetic recording
US7177118B2 (en) * 2004-05-24 2007-02-13 Hitachi Global Storage Technologies Netherlands B.V. Magnetic recording system with three-layer laminated media having improved signal-to-noise ratio
US7180710B2 (en) * 2004-05-24 2007-02-20 Hitachi Global Storage Technologies Netherlands B.V. Magnetic recording medium having three ferromagnetic layers with increasing intrinsic coercivity from the lower to the upper layer
NZ548087A (en) 2005-04-29 2010-10-29 Tomizo Yamamoto Rubber or resin foam containing zirconium or germanium
US7488545B2 (en) * 2006-04-12 2009-02-10 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording medium with laminated recording layers formed of exchange-coupled ferromagnetic layers
KR102451098B1 (ko) 2015-09-23 2022-10-05 삼성전자주식회사 자기 메모리 장치 및 이의 제조 방법
US10677109B2 (en) * 2017-08-17 2020-06-09 I. E. Jones Company High performance iron-based alloys for engine valvetrain applications and methods of making and use thereof

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Also Published As

Publication number Publication date
JPH02281414A (ja) 1990-11-19
JP3041702B2 (ja) 2000-05-15
EP0388088A3 (en) 1991-06-05
EP0388088A2 (en) 1990-09-19
JP3443547B2 (ja) 2003-09-02
EP0388088B1 (en) 1995-10-25
DE69023156D1 (de) 1995-11-30
JP2000207727A (ja) 2000-07-28
US5051288A (en) 1991-09-24
DE69023156T2 (de) 1996-05-30

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Legal Events

Date Code Title Description
PF Patent in force
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20090308