DE3474225D1 - Perpendicular magnetic recording medium - Google Patents
Perpendicular magnetic recording mediumInfo
- Publication number
- DE3474225D1 DE3474225D1 DE8484116314T DE3474225T DE3474225D1 DE 3474225 D1 DE3474225 D1 DE 3474225D1 DE 8484116314 T DE8484116314 T DE 8484116314T DE 3474225 T DE3474225 T DE 3474225T DE 3474225 D1 DE3474225 D1 DE 3474225D1
- Authority
- DE
- Germany
- Prior art keywords
- recording medium
- magnetic recording
- perpendicular magnetic
- medium
- recording
- 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
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
-
- 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
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/716—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by two or more magnetic layers
-
- 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
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/256—Heavy metal or aluminum or compound thereof
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59005201A JPS60150233A (ja) | 1984-01-14 | 1984-01-14 | 垂直磁気記録媒体 |
JP23228984A JPS60160016A (ja) | 1984-11-06 | 1984-11-06 | 垂直磁気記録媒体 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3474225D1 true DE3474225D1 (en) | 1988-10-27 |
Family
ID=26339105
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8484116314T Expired DE3474225D1 (en) | 1984-01-14 | 1984-12-27 | Perpendicular magnetic recording medium |
Country Status (4)
Country | Link |
---|---|
US (1) | US4643942A (de) |
EP (1) | EP0150498B1 (de) |
KR (1) | KR850005664A (de) |
DE (1) | DE3474225D1 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0313063A3 (de) * | 1987-10-23 | 1990-09-12 | Kyodo Printing Co., Ltd. | Magnetischer Aufzeichnungsträger |
GB8817855D0 (en) * | 1988-07-27 | 1988-09-01 | Emi Plc Thorn | Electromagnetic identification system |
EP0646277A1 (de) * | 1992-06-16 | 1995-04-05 | The Regents Of The University Of California | Supermagnetoresistive monofilm-legierungen |
US5843565A (en) * | 1996-10-31 | 1998-12-01 | Ampex Corporation | Particulate magnetic medium utilizing keeper technology and methods of manufacture |
WO2003079332A1 (en) * | 2002-03-18 | 2003-09-25 | Hitachi Maxell, Ltd. | Magnetic recording medium and magnetic recording cartridge |
US6964811B2 (en) * | 2002-09-20 | 2005-11-15 | Hitachi Maxell, Ltd. | Magnetic powder, method for producing the same and magnetic recording medium comprising the same |
GB2422949B (en) * | 2003-02-19 | 2007-05-30 | Hitachi Maxell | Magnetic recording medium |
US7736765B2 (en) * | 2004-12-28 | 2010-06-15 | Seagate Technology Llc | Granular perpendicular magnetic recording media with dual recording layer and method of fabricating same |
US8110298B1 (en) | 2005-03-04 | 2012-02-07 | Seagate Technology Llc | Media for high density perpendicular magnetic recording |
US8119263B2 (en) * | 2005-09-22 | 2012-02-21 | Seagate Technology Llc | Tuning exchange coupling in magnetic recording media |
US8418483B2 (en) | 2007-10-08 | 2013-04-16 | Emerson Climate Technologies, Inc. | System and method for calculating parameters for a refrigeration system with a variable speed compressor |
US8697260B2 (en) * | 2008-07-25 | 2014-04-15 | Seagate Technology Llc | Method and manufacture process for exchange decoupled first magnetic layer |
US7867637B2 (en) * | 2008-11-17 | 2011-01-11 | Seagate Technology Llc | Low coupling oxide media (LCOM) |
US9142240B2 (en) | 2010-07-30 | 2015-09-22 | Seagate Technology Llc | Apparatus including a perpendicular magnetic recording layer having a convex magnetic anisotropy profile |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3228881A (en) * | 1963-01-04 | 1966-01-11 | Chevron Res | Dispersions of discrete particles of ferromagnetic metals |
EP0043882A1 (de) * | 1980-07-16 | 1982-01-20 | Kodak-Pathe | Magnetisches Aufzeichnungselement, Verfahren zu seiner Herstellung und seine Verwendung beim Aufzeichnen |
JPS57183629A (en) * | 1981-05-03 | 1982-11-12 | Akio Otsubo | Magnetic coat medium of vertical orientation and its production |
JPS57195329A (en) * | 1981-05-26 | 1982-12-01 | Fuji Photo Film Co Ltd | Magnetic recording medium |
JPS5817539A (ja) * | 1981-07-21 | 1983-02-01 | Sony Corp | 磁気記録媒体 |
JPS5891523A (ja) * | 1981-11-25 | 1983-05-31 | Konishiroku Photo Ind Co Ltd | 磁気記録媒体 |
JPS58205928A (ja) * | 1982-05-25 | 1983-12-01 | Toshiba Corp | 磁気記録媒体 |
-
1984
- 1984-12-27 EP EP84116314A patent/EP0150498B1/de not_active Expired
- 1984-12-27 DE DE8484116314T patent/DE3474225D1/de not_active Expired
-
1985
- 1985-01-09 US US06/689,758 patent/US4643942A/en not_active Expired - Fee Related
- 1985-01-12 KR KR1019850000176A patent/KR850005664A/ko not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
EP0150498B1 (de) | 1988-09-21 |
KR850005664A (ko) | 1985-08-28 |
EP0150498A2 (de) | 1985-08-07 |
US4643942A (en) | 1987-02-17 |
EP0150498A3 (en) | 1987-09-30 |
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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 |