DE3789980D1 - Magnetisches Speichermedium mit senkrechter Anisotropie. - Google Patents
Magnetisches Speichermedium mit senkrechter Anisotropie.Info
- Publication number
- DE3789980D1 DE3789980D1 DE3789980T DE3789980T DE3789980D1 DE 3789980 D1 DE3789980 D1 DE 3789980D1 DE 3789980 T DE3789980 T DE 3789980T DE 3789980 T DE3789980 T DE 3789980T DE 3789980 D1 DE3789980 D1 DE 3789980D1
- Authority
- DE
- Germany
- Prior art keywords
- storage medium
- magnetic storage
- vertical anisotropy
- anisotropy
- vertical
- 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
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
- G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
- G11B5/656—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing Co
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F10/00—Thin magnetic films, e.g. of one-domain structure
- H01F10/08—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
- H01F10/10—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
- H01F10/18—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being compounds
- H01F10/20—Ferrites
-
- 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
- G11B5/658—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing oxygen, e.g. molecular oxygen or magnetic oxide
-
- 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
- G11B5/667—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers including a soft magnetic 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
- G11B2005/0002—Special dispositions or recording techniques
- G11B2005/0026—Pulse recording
- G11B2005/0029—Pulse recording using magnetisation components of the recording layer disposed mainly perpendicularly to the record carrier surface
-
- 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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12465—All metal or with adjacent metals having magnetic properties, or preformed fiber orientation coordinate with shape
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Power Engineering (AREA)
- Magnetic Record Carriers (AREA)
- Thin Magnetic Films (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6018486 | 1986-03-18 | ||
JP61224214A JPS6379227A (ja) | 1986-09-22 | 1986-09-22 | 垂直磁気記録媒体 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3789980D1 true DE3789980D1 (de) | 1994-07-14 |
DE3789980T2 DE3789980T2 (de) | 1995-01-05 |
Family
ID=26401252
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3789980T Expired - Fee Related DE3789980T2 (de) | 1986-03-18 | 1987-03-17 | Magnetisches Speichermedium mit senkrechter Anisotropie. |
Country Status (6)
Country | Link |
---|---|
US (2) | US4797330A (de) |
EP (1) | EP0238047B1 (de) |
KR (1) | KR930004442B1 (de) |
CN (1) | CN1009401B (de) |
CA (1) | CA1315612C (de) |
DE (1) | DE3789980T2 (de) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1315612C (en) * | 1986-03-18 | 1993-04-06 | Shogo Nasu | Perpendicular magnetic storage medium |
JPH01248312A (ja) * | 1988-03-29 | 1989-10-03 | Kanegafuchi Chem Ind Co Ltd | 垂直磁気記録媒体 |
US5143794A (en) * | 1988-08-10 | 1992-09-01 | Hitachi, Ltd. | Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatus |
EP0443478A3 (en) * | 1990-02-19 | 1992-03-11 | Kanegafuchi Kagaku Kogyo Kabushiki Kaisha | Magnetic recording medium and method for preparing the same |
JPH05109046A (ja) * | 1990-12-13 | 1993-04-30 | Hitachi Maxell Ltd | 磁気記録媒体及びその製造方法 |
JP2924935B2 (ja) * | 1992-08-26 | 1999-07-26 | 戸田工業株式会社 | 垂直磁化膜、垂直磁化膜用多層膜及び垂直磁化膜の製造法 |
US5587235A (en) * | 1993-02-19 | 1996-12-24 | Hitachi, Ltd. | Magnetic recording medium and magnetic recording apparatus |
JPH0785401A (ja) * | 1993-09-13 | 1995-03-31 | Sony Corp | 磁気記録方式 |
US5558945A (en) * | 1993-12-28 | 1996-09-24 | Tdk Corporation | Magnetic recording medium |
US5601904A (en) * | 1994-03-16 | 1997-02-11 | Toda Kogyo Corporation | Magnetic recording medium and process for producing the same |
JP3582435B2 (ja) * | 1999-12-10 | 2004-10-27 | 日本電気株式会社 | 垂直磁気記録媒体 |
US7160636B2 (en) * | 2002-09-13 | 2007-01-09 | Nec Tokin Corporation | Ferrite thin film, method of manufacturing the same and electromagnetic noise suppressor using the same |
US8394243B1 (en) | 2008-07-24 | 2013-03-12 | Wd Media, Inc. | Sputtered cobalt oxide for perpendicular magnetic recording medium with low media noise |
US8488276B1 (en) | 2008-09-30 | 2013-07-16 | WD Media, LLC | Perpendicular magnetic recording medium with grain isolation magnetic anistropy layer |
US8993133B1 (en) | 2010-12-23 | 2015-03-31 | WD Media, LLC | Intermediate layer for perpendicular magnetic recording medium with high permeability grain boundaries |
US9685184B1 (en) | 2014-09-25 | 2017-06-20 | WD Media, LLC | NiFeX-based seed layer for magnetic recording media |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5571006A (en) * | 1978-11-22 | 1980-05-28 | Matsushita Electric Ind Co Ltd | Magnetic thin film and its manufacturing method |
JPS57152517A (en) * | 1981-03-17 | 1982-09-20 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
JPS5883328A (ja) * | 1981-11-12 | 1983-05-19 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
JPS59198707A (ja) * | 1983-04-26 | 1984-11-10 | Ulvac Corp | 垂直磁気記録体 |
JPS59215025A (ja) * | 1983-05-21 | 1984-12-04 | Ulvac Corp | 垂直磁気記録体の製造法 |
EP0122030B1 (de) * | 1983-03-08 | 1987-08-26 | Nihon Shinku Gijutsu Kabushiki Kaisha | Magnetisches Aufzeichnungsmedium und Herstellungsverfahren für ein derartiges Medium |
JPS6035328A (ja) * | 1983-08-06 | 1985-02-23 | Canon Inc | 磁気記録媒体 |
CA1315612C (en) * | 1986-03-18 | 1993-04-06 | Shogo Nasu | Perpendicular magnetic storage medium |
DE3710477C2 (de) * | 1986-03-31 | 1999-05-12 | Japan Res Dev Corp | Dünne Schicht mit senkrechter Magnetisierungsisotropie |
-
1987
- 1987-03-03 CA CA000531065A patent/CA1315612C/en not_active Expired - Fee Related
- 1987-03-06 US US07/023,039 patent/US4797330A/en not_active Expired - Fee Related
- 1987-03-17 EP EP87103865A patent/EP0238047B1/de not_active Expired - Lifetime
- 1987-03-17 KR KR1019870002400A patent/KR930004442B1/ko not_active IP Right Cessation
- 1987-03-17 DE DE3789980T patent/DE3789980T2/de not_active Expired - Fee Related
- 1987-03-18 CN CN87101975A patent/CN1009401B/zh not_active Expired
-
1988
- 1988-10-20 US US07/260,844 patent/US5034286A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US4797330A (en) | 1989-01-10 |
DE3789980T2 (de) | 1995-01-05 |
KR870009339A (ko) | 1987-10-26 |
EP0238047B1 (de) | 1994-06-08 |
KR930004442B1 (ko) | 1993-05-27 |
US5034286A (en) | 1991-07-23 |
CN87101975A (zh) | 1987-10-21 |
EP0238047A2 (de) | 1987-09-23 |
CA1315612C (en) | 1993-04-06 |
EP0238047A3 (en) | 1989-08-30 |
CN1009401B (zh) | 1990-08-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |