KR900016953A - 자기기록 매체 및 그 제조방법 - Google Patents

자기기록 매체 및 그 제조방법 Download PDF

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KR900016953A
KR900016953A KR1019900004669A KR900004669A KR900016953A KR 900016953 A KR900016953 A KR 900016953A KR 1019900004669 A KR1019900004669 A KR 1019900004669A KR 900004669 A KR900004669 A KR 900004669A KR 900016953 A KR900016953 A KR 900016953A
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magnetic
alloy layer
recording medium
magnetic recording
magnetic alloy
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KR0176244B1 (ko
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후미아끼 요꼬야마
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이또오 다께또시
미쓰비시가세이 가부시끼가이샤
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    • 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
    • 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
    • G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
    • G11B5/657—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing inorganic, non-oxide compound of Si, N, P, B, H or C, e.g. in metal alloy or compound
    • 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
    • G11B5/73911—Inorganic substrates
    • G11B5/73913—Composites or coated substrates
    • 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
    • G11B5/73911—Inorganic substrates
    • G11B5/73917—Metallic substrates, i.e. elemental metal or metal alloy substrates
    • 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
    • G11B5/73911—Inorganic substrates
    • G11B5/73917—Metallic substrates, i.e. elemental metal or metal alloy substrates
    • G11B5/73919—Aluminium or titanium elemental or alloy substrates
    • 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
    • G11B5/73911—Inorganic substrates
    • G11B5/73921—Glass or ceramic substrates
    • 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
    • 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
    • G11B5/851—Coating a support with a magnetic layer by sputtering
    • 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
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    • 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
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    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12576—Boride, carbide or nitride 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
    • Y10T428/12826—Group VIB metal-base 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
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    • Y10T428/12771—Transition metal-base component
    • Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
    • Y10T428/12826—Group VIB metal-base component
    • Y10T428/12847—Cr-base component
    • Y10T428/12854—Next to Co-, Fe-, or Ni-base 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
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    • Y10T428/12—All metal or with adjacent metals
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    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12875—Platinum group metal-base 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
    • Y10T428/26—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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

내용 없음

Description

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 실시예1내지 6 및 비교예1로 부터 얻어진, B의 첨가량과 항자력 사이의 관계를 나타내는 그래프이며,
제2도는 실시예7 및 비교예2로 부터 얻어진 기질 바이어스 전압과 항자력 사이 의 관계를 나타내는 그래프이며,
제7도는 실시예 17에서 사용된 스퍼터링 (sputtering) 장치의 도식적 표현이고, 그중에서 번호 1은 표적을 가리키고, 번호 2는 기질 홀더를 가리키고, 번호 3은 비자성 기질을 가리키고, 번호 4는 중간전극을 가리키고, 번호5는 스퍼터링을 위한 동력 공급원을 가리키고, 번호 5은 중간전극을 위한 동력 공급원을 가리킨다.

Claims (46)

  1. 비자기기질과 기질위에 형성된 자기,합금층과 함께 그 사이에 삽입된 크롬을 주성분으로 함유하는 비자기 프라이더층으로 이루어지는 자기기록매체에 있어서, 이 중에서 자기 합금층은 코발트와 니켈을 주성분으로 함유하고 8원자%이하의 붕소를 함유하며 네가티브 바이어스 전압을 비자기기질에 적용하는 조건하에 스퍼터링에 의해 형성되는 자기기록매체.
  2. 제1항에 있어서. 비자기기질이 니켈-인층을 설치한 알루미늄 합금 시이트인 자기기록매체.
  3. 제1항에 있어서. 비자기기질이 금속기질, 유리기질. 세탁믹기질 및 수지기질로 구성되는 군에서 선택되는 자기기록매체
  4. 제1항에 있어서, 주성분으로 크롬을 함유하는 비자기 프라이머층이, 네가티브 바이어스 전압을 비자기기질에 적용하는 조건하에 스퍼터링에 의해 형성되는 자기기록매체.
  5. 제1항에 있어서, 자기 합금층이 0.005-8원자%의 붕소를 함유하는 자기기록매체.
  6. 제1항에 있어서. 자기 합금층내의 니켈함량이 로발트에 비하여 40원자%이하인 자기기록매체.
  7. 제6항에 있어서, 자기합금층 내외 니켈함량이 코발트에 비하여 15∼35원자%범위내인 자기기록매체.
  8. 제6항에 있어서, 자기 합금층내의 니켈 함량이 코발트에 비하여 20∼35원자%범위내인 자기기록매체.
  9. 제1항에 있어서, 자기 합금층이 크롬을 함유하는 자기기록매체.
  10. 제9항에 있어서. 자기 합긍층 내의 크롬함량이 5-26원자%인 자기기록매체.
  11. 제10항에 있어서, 자기 합금층 내의 크롬 함량이 6-18원자%인 자기기록매체.
  12. 제11항에 있어서. 자기 합금층 내의 크롬 함량이 8-14원자%인 자기기록매체.
  13. 제1항에 있어서, 자기 합금층의 두게가 300-1500A범위내인 자기기록매체.
  14. 제1항에 있어서, 스퍼터링 장치의 주동체의 접지부에 대하여 비자기기질에 네가티브 바이어스 전압이 적응되는 조건하에 스퍼터링에 의해 자기 합금층이 형성되는 자기기록매체.
  15. 제14항에 있어서, 고주파수 마그네트론 스퍼터링 장치의 주동체의 접지부에 대하여 비자기기질에 -40∼-25OV의 네가티브 바이어스 전압이 적용되는 조건하에 스퍼터링에 의해 자기 합금층이 형성되는 자기기록매체.
  16. 제14항에 있어서, 직류 마그네트론 스퍼터링 장치의 주동체의 접지부에 대하여 비자기기 질에 -50"-500V의 네가티브 바이어스 전압을 적응하는 조건하에서 스퍼터링에 의해 자기합금층이 형성되는 자기기록매체.
  17. 제1항에 있어서, 비자기 기질을 접지단위의 수준에 유지하고 플라즈마 전위는 접지전위 이상의 수준에 고정하는 조건하에 스퍼터링에 의해 자기 합금층이 형성되는 자기기록매체.
  18. 제17항에 있어서, 중간전극이 표적 근처에 제공되고 비자기기질의 접지부에 대하여 중간전극에 포지티브 전압이 적응되는 조건하에. 스퍼터링에 의해 자기 합금층이 형성되는 자기기록매체.
  19. 제18항에 있어서, 비자기기질의 접지부에 대하여 중간전극에 50∼500v의 포지티브 전압이 적응되는 자기기록매체.
  20. 제1항에 있어서. 자기 합금층 형성동안의 비자기기질의 온도가 120℃이상인 자기기록매체.
  21. 제20항에 있어서, 자기 합금층 형성동안의 비자기기질의 온도가 120-300℃범위내인 자기기록매체.
  22. 제1항에 있어서, 보호층이 자기 합금층 위에 형성되는 자기기록매체.
  23. 제22항에 있어서, 보호층 위에 윤활제층이 형성되는 자기기록매체.
  24. 크롬을 주성분으로 함유하는 비자기 프라이더층과 자기 합금층을 스퍼터링에 의해 비자기기질 위에 연속적으로 형성하는 것으로 이루어지는 자기기록매체의 제조방법에 있어서, 코발트와 니켈을 주성분으로 함유하고 8원자%이하의 붕소를 함유하는 자기 합금층을 형성하기 위해 비자기기질에 네가티브 바이어스 전압을 적용하는 조건하에 스퍼터링에 의해 자기 합금층이 형성되는 자기 기록매체의 제조방법.
  25. 제24항에 있어서, 니켈-인층을 설치한 알루미늄 합금판.이 비자기기질로서 사용되는 방법
  26. 제24항에 있어서, 금속기질, 유리기질, 세라믹기질 및 수지기질로 구성되는 군에서 선택되는 한 요소가 비자기기질로서 사용되는 방법.
  27. 제24항에 있어 서. 크롬을 주성분으로 함유하는 비자기 프라이더층이 비자기기질에 네가티브 바이어스 전압을 적응하는 조건하에 스퍼터링에 의해 형성되는 방법.
  28. 제24항에 있어서. 자기 합금층 내의 붕소 함량이 0.005∼8원자%인 방법.
  29. 제24항에 있어서, 자기 합금층 내의 니켈함량이 코발트에 비하여 40원자%이하인 방법.
  30. 제29항에 있어서, 자기 랍금층 내의 니켈함량이 코발트에 비하여 15∼35원자% 범위 인내인 방법
  31. 제29항에 있어서, 자기 합금층 내의 니켈 함량이 로발트에 비하여 20∼35원자%범위 이내인 방법.
  32. 제24항에 있어서, 자기 합금층이 크롬을 함유하는 방법.
  33. 제32항에 있어서, 자기 합금층 내의 크롬 함량이 5∼26원자%인 방법.
  34. 제33항에 있어서, 자기 합금층 내의 크롬함량이 6∼18원자%인 방법.
  35. 제33항에 있어서, 자기 합금층 내의 크롬함량이 8-14원자%인 방법.
  36. 제24항에 있어서, 자기 합금층의 두게가 300∼1500A이내조 만들어지는 방법.
  37. 제24항에 있어서. 스퍼터링 장치의 주동체의 접지부에 대하여 비자기기질에 네가티브 전압이 적용되는 조건하에 스퍼터링에 의해 자기합금층이 형성되는 방법.
  38. 제37항에 있어서, 고주파수 마그네트론 스퍼터링 장치의 주동체의 접지부에 대하여 비자기기질에 -47∼-250V의 네가티브 전압이 직용되는 조건하에 스퍼터링에 의해 자기 합금층이 형성되는 방법.
  39. 제37항에 있어서. 직류 마그네트론 스퍼터링 장치의 주동체의 접지부에 대하여 비자기기질에 -50∼-500V의 네가티브 펀압이 직응되는 조건하에 스퍼터링에 의해 자기 합금층이 형성되는 방법.
  40. 제24항에 있어서. 비자기기질이 접지 전위의 수준에 유지되고 플라즈마 전위는 접지 전위 이상의 수준에 유지되는 조건하에 스퍼터링에 의해 자기합금층이 형성되는 방법.
  41. 제40항에 있어서, 표적 근처에 중간전극이 제공되고 비자기기질의 접지부에 대하여 중간 전극에 포지티브 전압이 적용되는 조건하에 스퍼터링에 의해 자기 합금충이 형성되는 방법.
  42. 제41항에 있어서, 비자기 기질의 접지부에 대하여 중간전극에 50-500V의 포지티브 전압이 적용되는 조건하에 자기 합금층이 형성되는 방법.
  43. 제24항에 있어서, 자기 합금층 형성 동안의 비자기기질의 온도가 120℃이상의 수준으고 조정되는 방법,
  44. 제43항에 있어서, 자기 합금층 형성 동안의 비자기기질의 온도가 120-300℃범위 내의 수준으로 조정되는 방법.
  45. 제24항에 있어서, 보호층이 자기 합금층 위에 형성되는 방법.
  46. 제45항에 있어서, 보호층 위에 윤활제층이 형성되는 방법
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019900004669A 1989-04-04 1990-04-04 자기 기록 매체 및 그 제조방법 KR0176244B1 (ko)

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Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6938825B1 (en) 1989-04-24 2005-09-06 Ultracard, Inc. Data system
JPH05274644A (ja) * 1992-01-29 1993-10-22 Mitsubishi Kasei Corp 磁気記録媒体及びその製造方法
US5441788A (en) * 1993-11-03 1995-08-15 Hewlett-Packard Company Method of preparing recording media for a disk drive and disk drive recording media
DE19508535A1 (de) * 1995-03-10 1996-09-12 Leybold Materials Gmbh Sputtertarget aus einer Kobalt-Basislegierung mit hohem Magnetfelddurchgriff
US6022609A (en) * 1996-10-02 2000-02-08 Seagate Technology, Inc. Magnetic recording medium with substantially uniform sub-micron-scale morphology
DE19720251A1 (de) * 1997-05-15 1998-11-19 Fraunhofer Ges Forschung Verfahren zum Beschichten von Dünnfilmmagnetplatten
US5968627A (en) * 1998-01-15 1999-10-19 Flextor, Inc. Metal foil disk for high areal density recording in environments of high mechanical shock
US6871787B1 (en) 1998-07-10 2005-03-29 Ultracard, Inc. Data storage card having a glass substrate and data surface region and method for using same
US6210819B1 (en) 1998-07-24 2001-04-03 Hmt Technology Corporation Magnetic recording media having a CrTi underlayer deposited under a substrate bias
US6495252B1 (en) * 1999-07-22 2002-12-17 Seagate Technology Llc Magnetic recording medium with superparamagnetic underlayer
EP1154410B1 (en) 1999-09-01 2006-10-18 Showa Denko K.K. Magnetic recording medium and magnetic recording device
US7036739B1 (en) 1999-10-23 2006-05-02 Ultracard, Inc. Data storage device apparatus and method for using same
US8397998B1 (en) 1999-10-23 2013-03-19 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
US6969006B1 (en) 2000-09-15 2005-11-29 Ultracard, Inc. Rotable portable card having a data storage device, apparatus and method for using same
US6709774B2 (en) * 2001-09-18 2004-03-23 International Business Machines Corporation Magnetic thin film disks with a nonuniform composition
JP4466925B2 (ja) * 2004-08-10 2010-05-26 日鉱金属株式会社 フレキシブル銅基板用バリア膜及びバリア膜形成用スパッタリングターゲット
JP2006236399A (ja) * 2005-02-22 2006-09-07 Fuji Photo Film Co Ltd 磁気記録媒体
KR102310933B1 (ko) 2021-03-11 2021-10-07 남서울대학교 산학협력단 자석을 통전용으로 사용한 중공형 방수슬립링

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2542201A1 (de) * 1975-09-22 1977-03-31 Siemens Ag Verfahren zur herstellung von platten fuer die speicherung von videosignalen
JPS56148729A (en) * 1980-04-21 1981-11-18 Fuji Photo Film Co Ltd Magnetic recording medium
JPS5961014A (ja) * 1982-09-29 1984-04-07 Fuji Photo Film Co Ltd 磁気記録媒体
JPS60113320A (ja) * 1983-11-22 1985-06-19 Nec Corp 記録体基板およびその製造方法
EP0154158B1 (en) * 1984-02-02 1988-10-19 Hitachi Metals, Ltd. Process for manufacturing magnetic recording media
EP0182367B1 (en) * 1984-11-20 1990-04-18 Hitachi Maxell Ltd. Magnetic recording medium and production of the same
EP0205239A3 (en) * 1985-05-03 1987-11-19 Akashic Memories Corporation Thin film magnetic disc
EP0261240B1 (en) * 1985-06-21 1992-05-06 Sumitomo Metal Mining Company Limited Magnetic recording medium
JPS62112226A (ja) * 1985-11-11 1987-05-23 Sony Corp 垂直磁気記録媒体の製造方法
JPS62141628A (ja) * 1985-12-16 1987-06-25 Fuji Electric Co Ltd 磁気記録媒体
US4755426A (en) * 1986-01-18 1988-07-05 Hitachi Maxell, Ltd. Magnetic recording medium and production of the same
JPS62242324A (ja) * 1986-04-14 1987-10-22 松下電器産業株式会社 チツプコンデンサ−
JPS6326827A (ja) * 1986-07-21 1988-02-04 Hitachi Ltd 磁気記録媒体の製造方法
JPS63149848A (ja) * 1986-12-12 1988-06-22 Matsushita Electric Ind Co Ltd 光磁気デイスク製造装置
JPS63162090A (ja) * 1986-12-24 1988-07-05 Hitachi Ltd 水棲生物の附着汚損を防止する装置
EP0303324A1 (en) * 1987-08-10 1989-02-15 Koninklijke Philips Electronics N.V. Magnetic material, method of manufacturing this material and a magnetic head provided with this material
KR970002340B1 (ko) * 1988-07-15 1997-03-03 미쓰비시 가세이 가부시끼가이샤 자기 기록 매체의 제조방법

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EP0391258A3 (en) 1991-04-03
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