CN1212610C - 垂直磁记录介质 - Google Patents
垂直磁记录介质 Download PDFInfo
- Publication number
- CN1212610C CN1212610C CNB021608393A CN02160839A CN1212610C CN 1212610 C CN1212610 C CN 1212610C CN B021608393 A CNB021608393 A CN B021608393A CN 02160839 A CN02160839 A CN 02160839A CN 1212610 C CN1212610 C CN 1212610C
- Authority
- CN
- China
- Prior art keywords
- magnetic
- layer
- recording
- recording medium
- recording layer
- 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 - Fee Related
Links
- 230000005291 magnetic effect Effects 0.000 claims abstract description 114
- 239000000758 substrate Substances 0.000 claims abstract description 12
- 230000005294 ferromagnetic effect Effects 0.000 claims description 33
- 230000005415 magnetization Effects 0.000 claims description 29
- 230000008878 coupling Effects 0.000 claims description 18
- 238000010168 coupling process Methods 0.000 claims description 18
- 238000005859 coupling reaction Methods 0.000 claims description 18
- 229910052723 transition metal Inorganic materials 0.000 claims description 18
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 16
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims description 11
- 230000005389 magnetism Effects 0.000 claims description 11
- 150000002910 rare earth metals Chemical class 0.000 claims description 7
- 229910052763 palladium Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 2
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 2
- 230000005308 ferrimagnetism Effects 0.000 abstract 1
- 230000005381 magnetic domain Effects 0.000 description 16
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- -1 rare-earth transition metal Chemical class 0.000 description 8
- 150000003624 transition metals Chemical class 0.000 description 8
- 230000007704 transition Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 229910052796 boron Inorganic materials 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005307 ferromagnetism Effects 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000005290 antiferromagnetic effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000005303 antiferromagnetism Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
Images
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
-
- 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
- Y10T428/26—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
Abstract
Description
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP397814/2001 | 2001-12-27 | ||
JP2001397814A JP3947001B2 (ja) | 2001-12-27 | 2001-12-27 | 情報記録媒体及び情報記憶装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1430208A CN1430208A (zh) | 2003-07-16 |
CN1212610C true CN1212610C (zh) | 2005-07-27 |
Family
ID=19189246
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB021608393A Expired - Fee Related CN1212610C (zh) | 2001-12-27 | 2002-12-27 | 垂直磁记录介质 |
Country Status (6)
Country | Link |
---|---|
US (1) | US6875527B2 (zh) |
EP (1) | EP1324317B1 (zh) |
JP (1) | JP3947001B2 (zh) |
KR (1) | KR100897873B1 (zh) |
CN (1) | CN1212610C (zh) |
DE (1) | DE60203093T2 (zh) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1406247B1 (en) * | 2001-05-23 | 2009-03-25 | Fujitsu Limited | Vertical recording type magnetic recording medilim and magnetic memory device using the medium |
US20090191331A1 (en) * | 2006-03-31 | 2009-07-30 | Hoya Corporation | Perpendicular magnetic recording medium manufacturing method |
JP4711984B2 (ja) * | 2007-02-26 | 2011-06-29 | 昭和電工株式会社 | 垂直磁気記録媒体、磁気記憶装置および磁気記録方法 |
FR2923644A1 (fr) * | 2007-11-12 | 2009-05-15 | Centre Nat Rech Scient | Dispositif d'enregistrement magnetique, notamment pour disque dur et son procede de fabrication |
US7833266B2 (en) * | 2007-11-28 | 2010-11-16 | Boston Scientific Scimed, Inc. | Bifurcated stent with drug wells for specific ostial, carina, and side branch treatment |
US7951193B2 (en) * | 2008-07-23 | 2011-05-31 | Boston Scientific Scimed, Inc. | Drug-eluting stent |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07105082B2 (ja) * | 1985-11-28 | 1995-11-13 | ソニー株式会社 | 光磁気記録媒体 |
JPH02227814A (ja) * | 1989-02-28 | 1990-09-11 | Mitsubishi Electric Corp | 垂直磁気記録媒体及びその製造方法 |
EP0642125B1 (en) * | 1993-08-04 | 1999-10-20 | Koninklijke Philips Electronics N.V. | Magneto-optical recording medium |
US5663935A (en) * | 1995-02-08 | 1997-09-02 | Canon Kabushiki Kaisha | Magneto-optical recording medium having two magnetic layers of exchange-coupled at ferromagnetic phase |
US5717662A (en) * | 1995-05-12 | 1998-02-10 | Canon Kabushiki Kaisha | Super-resolution magneto-optical recording medium using magnetostatic coupling and information reproduction method using the medium |
JP2000132824A (ja) * | 1998-10-29 | 2000-05-12 | Fujitsu Ltd | 拡散防止層を有する磁気記録媒体 |
JP4097814B2 (ja) * | 1998-11-16 | 2008-06-11 | シャープ株式会社 | 磁気記録媒体および磁気再生方法 |
JP2000215431A (ja) | 1999-01-28 | 2000-08-04 | Hitachi Ltd | 磁気記録用媒体 |
EP1302932B1 (en) * | 1999-06-08 | 2004-10-13 | Fujitsu Limited | Magnetic recording medium |
JP2001148109A (ja) | 1999-11-19 | 2001-05-29 | Hitachi Maxell Ltd | 磁気ディスク、磁気ディスク装置 |
JP2003016620A (ja) * | 2001-06-29 | 2003-01-17 | Toshiba Corp | 磁気記録媒体、磁気記録装置および磁気記録方法 |
-
2001
- 2001-12-27 JP JP2001397814A patent/JP3947001B2/ja not_active Expired - Fee Related
-
2002
- 2002-12-06 EP EP02258460A patent/EP1324317B1/en not_active Expired - Fee Related
- 2002-12-06 DE DE60203093T patent/DE60203093T2/de not_active Expired - Fee Related
- 2002-12-11 US US10/316,643 patent/US6875527B2/en not_active Expired - Fee Related
- 2002-12-12 KR KR1020020079058A patent/KR100897873B1/ko not_active IP Right Cessation
- 2002-12-27 CN CNB021608393A patent/CN1212610C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
KR20030057311A (ko) | 2003-07-04 |
KR100897873B1 (ko) | 2009-05-15 |
US20030169615A1 (en) | 2003-09-11 |
DE60203093T2 (de) | 2005-07-21 |
EP1324317A1 (en) | 2003-07-02 |
DE60203093D1 (de) | 2005-04-07 |
CN1430208A (zh) | 2003-07-16 |
US6875527B2 (en) | 2005-04-05 |
JP3947001B2 (ja) | 2007-07-18 |
JP2003203322A (ja) | 2003-07-18 |
EP1324317B1 (en) | 2005-03-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
ASS | Succession or assignment of patent right |
Owner name: SHOWA DENKO CO., LTD. Free format text: FORMER OWNER: FUJITSU LIMITED Effective date: 20100608 |
|
C41 | Transfer of patent application or patent right or utility model | ||
COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: KANAGAWA, JAPAN TO: TOKYO, JAPAN |
|
TR01 | Transfer of patent right |
Effective date of registration: 20100608 Address after: Tokyo, Japan Patentee after: Showa Denko K. K. Address before: Kanagawa, Japan Patentee before: Fujitsu Ltd. |
|
C17 | Cessation of patent right | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050727 Termination date: 20100127 |