SG97791A1 - High coercivity cobalt based alloy longitudinal recording media and method for its fabrication - Google Patents

High coercivity cobalt based alloy longitudinal recording media and method for its fabrication

Info

Publication number
SG97791A1
SG97791A1 SG9902226A SG1999002226A SG97791A1 SG 97791 A1 SG97791 A1 SG 97791A1 SG 9902226 A SG9902226 A SG 9902226A SG 1999002226 A SG1999002226 A SG 1999002226A SG 97791 A1 SG97791 A1 SG 97791A1
Authority
SG
Singapore
Prior art keywords
fabrication
recording media
based alloy
high coercivity
cobalt based
Prior art date
Application number
SG9902226A
Other languages
English (en)
Inventor
Jian Ping Wang
Lea Peng Tan
Ming Lang Yan
Tow Chong Chong
Original Assignee
Inst Data Storage
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 Inst Data Storage filed Critical Inst Data Storage
Priority to SG9902226A priority Critical patent/SG97791A1/en
Priority to JP11287078A priority patent/JP2000331338A/ja
Priority to US09/518,710 priority patent/US20020098389A1/en
Publication of SG97791A1 publication Critical patent/SG97791A1/en

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
    • 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
    • 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
    • G11B5/7369—Two or more non-magnetic underlayers, e.g. seed layers or barrier 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
    • G11B5/73—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
    • G11B5/7369—Two or more non-magnetic underlayers, e.g. seed layers or barrier layers
    • G11B5/737—Physical structure of underlayer, e.g. texture
    • 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
    • G11B5/7377—Physical structure of underlayer, e.g. texture
    • 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
SG9902226A 1999-05-13 1999-05-13 High coercivity cobalt based alloy longitudinal recording media and method for its fabrication SG97791A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SG9902226A SG97791A1 (en) 1999-05-13 1999-05-13 High coercivity cobalt based alloy longitudinal recording media and method for its fabrication
JP11287078A JP2000331338A (ja) 1999-05-13 1999-10-07 コバルトベース合金製の高保磁度縦方向記録媒体およびその製造法
US09/518,710 US20020098389A1 (en) 1999-05-13 2000-03-03 High coercivity chp structural Co-based aloy longitudinal recording media and method for its fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SG9902226A SG97791A1 (en) 1999-05-13 1999-05-13 High coercivity cobalt based alloy longitudinal recording media and method for its fabrication

Publications (1)

Publication Number Publication Date
SG97791A1 true SG97791A1 (en) 2003-08-20

Family

ID=20430354

Family Applications (1)

Application Number Title Priority Date Filing Date
SG9902226A SG97791A1 (en) 1999-05-13 1999-05-13 High coercivity cobalt based alloy longitudinal recording media and method for its fabrication

Country Status (3)

Country Link
US (1) US20020098389A1 (ja)
JP (1) JP2000331338A (ja)
SG (1) SG97791A1 (ja)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4746778B2 (ja) * 2001-06-28 2011-08-10 株式会社日立グローバルストレージテクノロジーズ 磁気記録媒体及びそれを用いた磁気記憶装置
JP2003162813A (ja) * 2001-11-28 2003-06-06 Hitachi Ltd 磁気記録媒体および磁気記憶装置
WO2003083840A1 (en) * 2002-03-29 2003-10-09 Fujitsu Limited Magnetic recording medium and magnetic storage apparatus
US8712407B1 (en) 2012-04-05 2014-04-29 Sprint Communications Company L.P. Multiple secure elements in mobile electronic device with near field communication capability
US8667607B2 (en) 2012-07-24 2014-03-04 Sprint Communications Company L.P. Trusted security zone access to peripheral devices
US9183412B2 (en) 2012-08-10 2015-11-10 Sprint Communications Company L.P. Systems and methods for provisioning and using multiple trusted security zones on an electronic device
US9215180B1 (en) 2012-08-25 2015-12-15 Sprint Communications Company L.P. File retrieval in real-time brokering of digital content
US8752140B1 (en) 2012-09-11 2014-06-10 Sprint Communications Company L.P. System and methods for trusted internet domain networking
US9161325B1 (en) 2013-11-20 2015-10-13 Sprint Communications Company L.P. Subscriber identity module virtualization
US9118655B1 (en) 2014-01-24 2015-08-25 Sprint Communications Company L.P. Trusted display and transmission of digital ticket documentation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5037515A (en) * 1989-09-18 1991-08-06 Hmt Technology Corporation Method for making smooth-surfaced magnetic recording medium
US5344706A (en) * 1991-10-01 1994-09-06 Carnegie Mellon University Magnetic recording medium comprising an underlayer and a cobalt samarium amorphous magnetic layer having a SmCo5 crystalline interface with the underlayer
WO1998016923A1 (en) * 1996-10-17 1998-04-23 Seagate Technology, Inc. Magnetic recording medium comprising a nickel aluminum or iron aluminum underlayer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5037515A (en) * 1989-09-18 1991-08-06 Hmt Technology Corporation Method for making smooth-surfaced magnetic recording medium
US5344706A (en) * 1991-10-01 1994-09-06 Carnegie Mellon University Magnetic recording medium comprising an underlayer and a cobalt samarium amorphous magnetic layer having a SmCo5 crystalline interface with the underlayer
WO1998016923A1 (en) * 1996-10-17 1998-04-23 Seagate Technology, Inc. Magnetic recording medium comprising a nickel aluminum or iron aluminum underlayer

Also Published As

Publication number Publication date
JP2000331338A (ja) 2000-11-30
US20020098389A1 (en) 2002-07-25

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