DE69023170D1 - Magnetischer Träger für longitudinale Aufzeichnung. - Google Patents
Magnetischer Träger für longitudinale Aufzeichnung.Info
- Publication number
- DE69023170D1 DE69023170D1 DE69023170T DE69023170T DE69023170D1 DE 69023170 D1 DE69023170 D1 DE 69023170D1 DE 69023170 T DE69023170 T DE 69023170T DE 69023170 T DE69023170 T DE 69023170T DE 69023170 D1 DE69023170 D1 DE 69023170D1
- Authority
- DE
- Germany
- Prior art keywords
- magnetic
- magnetic carrier
- longitudinal recording
- layer
- track
- 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
- 101000606504 Drosophila melanogaster Tyrosine-protein kinase-like otk Proteins 0.000 abstract 1
- 230000005415 magnetization Effects 0.000 abstract 1
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
-
- 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
-
- 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
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
-
- 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
Landscapes
- Magnetic Record Carriers (AREA)
- Magnetic Heads (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
- Paints Or Removers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/364,900 US5176965A (en) | 1987-10-05 | 1989-06-12 | Magnetic medium for longitudinal recording |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69023170D1 true DE69023170D1 (de) | 1995-11-30 |
DE69023170T2 DE69023170T2 (de) | 1996-04-18 |
Family
ID=23436583
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69023170T Expired - Fee Related DE69023170T2 (de) | 1989-06-12 | 1990-05-14 | Magnetischer Träger für longitudinale Aufzeichnung. |
Country Status (5)
Country | Link |
---|---|
US (2) | US5176965A (de) |
EP (1) | EP0403076B1 (de) |
JP (1) | JPH0775070B2 (de) |
AT (1) | ATE129590T1 (de) |
DE (1) | DE69023170T2 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5587235A (en) * | 1993-02-19 | 1996-12-24 | Hitachi, Ltd. | Magnetic recording medium and magnetic recording apparatus |
US5851643A (en) * | 1993-11-11 | 1998-12-22 | Hitachi, Ltd. | Magnetic recording media and magnetic recording read-back system which uses such media |
US5750270A (en) * | 1995-02-07 | 1998-05-12 | Conner Peripherals, Inc. | Multi-layer magnetic recording media |
US5830590A (en) * | 1996-06-28 | 1998-11-03 | Ampex Corporation | Magnetic storage and reproducing system with a low permeability keeper and a self-biased magnetoresistive reproduce head |
US5861220A (en) * | 1996-08-06 | 1999-01-19 | Ampex Corporation | Method and apparatus for providing a magnetic storage and reproducing media with a keeper layer having a longitudinal anisotropy |
US5843565A (en) * | 1996-10-31 | 1998-12-01 | Ampex Corporation | Particulate magnetic medium utilizing keeper technology and methods of manufacture |
US6031682A (en) * | 1997-07-14 | 2000-02-29 | Iomega Corporation | Track trimming and orthogonal recording for cartridge tape |
US6495252B1 (en) * | 1999-07-22 | 2002-12-17 | Seagate Technology Llc | Magnetic recording medium with superparamagnetic underlayer |
JP2002288817A (ja) * | 2001-03-26 | 2002-10-04 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
US6842313B1 (en) | 2002-04-08 | 2005-01-11 | Maxtor Corporation | Floating down stream perpendicular write head shield |
US7075756B1 (en) | 2002-11-07 | 2006-07-11 | Maxtor Corporation | Shielded pole writer |
US7729092B1 (en) | 2002-11-07 | 2010-06-01 | Seagate Technology Llc | Shielded pole writer under reader |
US7149045B1 (en) | 2002-11-07 | 2006-12-12 | Maxtor Corporation | Longitudinal media with soft underlayer and perpendicular write head |
US7189583B2 (en) | 2003-07-02 | 2007-03-13 | Micron Technology, Inc. | Method for production of MRAM elements |
US7092209B2 (en) * | 2004-03-01 | 2006-08-15 | Hitachi Global Storage Technologies Netherlands B.V. | Longitudinal magnetic recording using magnetic media with a soft underlayer |
US7927724B2 (en) | 2004-05-28 | 2011-04-19 | Hitachi Global Storage Technologies Netherlands B.V. | Magnetic recording media with orthogonal anisotropy enhancement or bias layer |
US7425377B2 (en) * | 2005-02-04 | 2008-09-16 | Hitachi Global Storage Technologies Netherlands B.V. | Incoherently-reversing magnetic laminate with exchange coupled ferromagnetic layers |
JP4113879B2 (ja) * | 2005-02-04 | 2008-07-09 | Tdk株式会社 | 垂直磁気記録ヘッドおよび磁気記録装置 |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1153069B (de) * | 1960-02-06 | 1963-08-22 | Grundig Max | Anordnung zur Aufzeichnung von beliebigen Signalen mit einem Quermagnetisierungsmagnetkopf |
US3393982A (en) * | 1962-11-08 | 1968-07-23 | Ncr Co | Ferromagnetic storage devices having uniaxial anisotropy |
FR1438563A (fr) * | 1965-04-02 | 1966-05-13 | Bull General Electric | Perfectionnements aux lames ou couches ferromagnétiques couplées |
FR2428886A1 (fr) * | 1978-06-13 | 1980-01-11 | Cii Honeywell Bull | Support d'information magnetique a enregistrement perpendiculaire |
JPS5771518A (en) * | 1980-10-22 | 1982-05-04 | Dainippon Printing Co Ltd | Magnetic recording medium |
JPS5864634A (ja) * | 1981-10-13 | 1983-04-18 | Hitachi Maxell Ltd | 磁気記録媒体 |
JPS58129032A (ja) * | 1982-01-28 | 1983-08-01 | Toyo Tire & Rubber Co Ltd | 空気タイヤ組成物 |
US4621030A (en) * | 1982-07-19 | 1986-11-04 | Hitachi, Ltd. | Perpendicular magnetic recording medium and manufacturing method thereof |
JPS5972644A (ja) * | 1982-10-19 | 1984-04-24 | Nec Corp | 磁気二重層記録媒体 |
JPH061729B2 (ja) * | 1983-01-17 | 1994-01-05 | 株式会社日立製作所 | 磁性体膜およびそれを用いた磁気ヘッド |
JPS6052919A (ja) * | 1983-09-01 | 1985-03-26 | Nec Corp | 垂直磁気記録体及びその製造方法 |
US4687712A (en) * | 1983-12-12 | 1987-08-18 | Matsushita Electric Industrial Co., Ltd. | Vertical magnetic recording medium |
JPH0622170B2 (ja) * | 1983-12-16 | 1994-03-23 | 株式会社日立製作所 | 磁気ヘッド |
DE3346876A1 (de) * | 1983-12-23 | 1985-07-11 | Siemens AG, 1000 Berlin und 8000 München | Kombinierter schreib- und lese-magnetkopf zur senkrechten magnetisierung eines entsprechenden aufzeichnungsmediums |
DE3566848D1 (en) * | 1984-05-04 | 1989-01-19 | Siemens Ag | Thin-layer double-gap magnetic head for a perpendicularly magnetized recording medium |
JPS6199932A (ja) * | 1984-10-19 | 1986-05-19 | Sony Corp | 垂直磁気記録媒体の製造方法 |
EP0186286B1 (de) * | 1984-10-31 | 1991-01-02 | Unilever N.V. | Vorrichtung zur Verwendung in elektrischen, z.B. elektrochemischen Messverfahren, ihre Herstellung und Verwendung und Zusammenstellungen, die diese Vorrichtung enthalten |
US4656546A (en) * | 1985-01-22 | 1987-04-07 | Digital Equipment Corporation | Vertical magnetic recording arrangement |
JPS61177633A (ja) * | 1985-01-31 | 1986-08-09 | Fujitsu Ltd | 垂直磁化記録媒体の製造方法 |
JPS61187125A (ja) * | 1985-02-14 | 1986-08-20 | Hitachi Ltd | 磁気デイスクの磁場配向方法 |
US4729805A (en) * | 1985-03-14 | 1988-03-08 | Minnesota Mining And Manufacturing Company | Recording medium annealing process |
US4677032A (en) * | 1985-09-23 | 1987-06-30 | International Business Machines Corporation | Vertical magnetic recording media with multilayered magnetic film structure |
US4735840A (en) * | 1985-11-12 | 1988-04-05 | Cyberdisk, Inc. | Magnetic recording disk and sputtering process and apparatus for producing same |
JPS62204429A (ja) * | 1986-03-04 | 1987-09-09 | Nippon Hoso Kyokai <Nhk> | 磁気記録媒体および磁気ヘツド |
JPH01503262A (ja) * | 1987-10-05 | 1989-11-02 | ディジタル イクイプメント コーポレーション | 縦記録用磁気記録媒体 |
-
1989
- 1989-06-12 US US07/364,900 patent/US5176965A/en not_active Expired - Lifetime
-
1990
- 1990-05-14 AT AT90305149T patent/ATE129590T1/de active
- 1990-05-14 EP EP90305149A patent/EP0403076B1/de not_active Expired - Lifetime
- 1990-05-14 DE DE69023170T patent/DE69023170T2/de not_active Expired - Fee Related
- 1990-06-11 JP JP2152520A patent/JPH0775070B2/ja not_active Expired - Lifetime
-
1992
- 1992-09-16 US US07/945,706 patent/US5431969A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0403076A3 (de) | 1991-07-03 |
EP0403076A2 (de) | 1990-12-19 |
JPH0775070B2 (ja) | 1995-08-09 |
EP0403076B1 (de) | 1995-10-25 |
DE69023170T2 (de) | 1996-04-18 |
US5176965A (en) | 1993-01-05 |
ATE129590T1 (de) | 1995-11-15 |
JPH0363932A (ja) | 1991-03-19 |
US5431969A (en) | 1995-07-11 |
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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 |