DE69228451T2 - Dünnfilmwandler mit verbesserter induktiver Kopplung - Google Patents
Dünnfilmwandler mit verbesserter induktiver KopplungInfo
- Publication number
- DE69228451T2 DE69228451T2 DE69228451T DE69228451T DE69228451T2 DE 69228451 T2 DE69228451 T2 DE 69228451T2 DE 69228451 T DE69228451 T DE 69228451T DE 69228451 T DE69228451 T DE 69228451T DE 69228451 T2 DE69228451 T2 DE 69228451T2
- Authority
- DE
- Germany
- Prior art keywords
- thin film
- inductive coupling
- improved inductive
- film converter
- converter
- 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
- 230000008878 coupling Effects 0.000 title 1
- 238000010168 coupling process Methods 0.000 title 1
- 238000005859 coupling reaction Methods 0.000 title 1
- 230000001939 inductive effect Effects 0.000 title 1
- 239000010409 thin film Substances 0.000 title 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/17—Construction or disposition of windings
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3109—Details
- G11B5/3113—Details for improving the magnetic domain structure or avoiding the formation or displacement of undesirable magnetic domains
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3109—Details
- G11B5/313—Disposition of layers
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3163—Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
- Y10T29/49032—Fabricating head structure or component thereof
- Y10T29/49034—Treating to affect magnetic properties
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
- Y10T29/49032—Fabricating head structure or component thereof
- Y10T29/49055—Fabricating head structure or component thereof with bond/laminating preformed parts, at least two magnetic
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/721,233 US5311386A (en) | 1989-06-02 | 1991-06-26 | Transducer with improved inductive coupling |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69228451D1 DE69228451D1 (de) | 1999-04-01 |
DE69228451T2 true DE69228451T2 (de) | 1999-07-22 |
Family
ID=24897087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69228451T Expired - Fee Related DE69228451T2 (de) | 1991-06-26 | 1992-06-12 | Dünnfilmwandler mit verbesserter induktiver Kopplung |
Country Status (5)
Country | Link |
---|---|
US (2) | US5311386A (de) |
EP (1) | EP0520656B1 (de) |
JP (1) | JPH05234036A (de) |
DE (1) | DE69228451T2 (de) |
SG (1) | SG47800A1 (de) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0568966A2 (de) * | 1992-05-04 | 1993-11-10 | Read-Rite Corporation | Dünnfilmmagnetköpfe mit Mehrfach-Jochen |
US5570251A (en) * | 1993-07-07 | 1996-10-29 | Tdk Corporation | Thin film magnetic device with plural valves of magnetostriction |
US5717552A (en) * | 1996-09-10 | 1998-02-10 | Ampex Corporation | Magnetic core with field confinement structure |
US6441994B1 (en) * | 1999-07-15 | 2002-08-27 | Seagate Technology Llc | High frequency response writer with recessed shared pole and vertical coils |
JP3551099B2 (ja) * | 1999-09-28 | 2004-08-04 | 日本電気株式会社 | 磁気テープ装置用薄膜磁気ヘッド |
US6667848B1 (en) | 2000-01-10 | 2003-12-23 | Seagate Technology Llc | Perpendicular magnetic recording head with means for suppressing noise from soft magnetic underlayer of recording media |
US6574072B1 (en) | 2000-01-12 | 2003-06-03 | Seagate Technology Llc | Perpendicular magnetic recording head with radial magnetic field generator which reduces noise from soft magnetic underlayer of recording disk |
US6707642B1 (en) * | 2000-02-04 | 2004-03-16 | Seagate Technology Llc | Longitudinal magnetic recording head with reduced side fringing |
US6717770B1 (en) | 2000-03-24 | 2004-04-06 | Seagate Technology Llc | Recording head for applying a magnetic field perpendicular to the magnetizations within magnetic storage media |
US6972932B2 (en) * | 2000-09-06 | 2005-12-06 | Seagate Technology Llc | High-efficiency single-turn write head for high-speed recording |
JP4008654B2 (ja) * | 2000-11-29 | 2007-11-14 | 新科實業有限公司 | 薄膜磁気ヘッドおよびその製造方法 |
US6671128B2 (en) | 2001-03-29 | 2003-12-30 | Seagate Technology Llc | Recording head with oppositely directed microstrip waveguide conductors to induce a magnetic write field for longitudinal or perpendicular magnetic recording |
CN1248196C (zh) * | 2001-08-21 | 2006-03-29 | 西加特技术有限责任公司 | 包括空间激励的自旋波模式写入器的磁记录头 |
US7248433B1 (en) * | 2004-02-02 | 2007-07-24 | Western Digital (Fremont), Inc. | Magnetic head with stitched top pole layer and single layer coil or solenoidal coil |
US7633711B2 (en) * | 2007-02-07 | 2009-12-15 | Hitachi Global Storage Technologies Netherlands B.V. | Magnetic write head with helical coil structure using multiple materials |
AU2008219354B2 (en) | 2007-09-19 | 2014-02-13 | Viavi Solutions Inc. | Anisotropic magnetic flakes |
Family Cites Families (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3549825A (en) * | 1967-09-18 | 1970-12-22 | Ncr Co | Magnetic transducer with planar spiral coil extending into the gap |
US3967368A (en) * | 1972-10-11 | 1976-07-06 | International Business Machines Corporation | Method for manufacturing and using an internally biased magnetoresistive magnetic transducer |
GB1440343A (en) * | 1973-04-13 | 1976-06-23 | Data Recording Instr Co | Magnetic core and coil assemblies |
NL7508533A (nl) * | 1975-07-17 | 1977-01-19 | Philips Nv | Dunne film magneetkop voor het lezen en schrijven van informatie. |
JPS545710A (en) * | 1977-06-15 | 1979-01-17 | Fujitsu Ltd | Thin-film magnetic head |
US4165525A (en) * | 1978-02-15 | 1979-08-21 | U.S. Philips Corporation | Magnetic head having a core provided on a substrate by means of thin-film technology |
JPS5584016A (en) * | 1978-12-19 | 1980-06-24 | Sony Corp | Magnetic head and its manufacture |
US4335410A (en) * | 1979-01-15 | 1982-06-15 | Magnex Corporation | Thin film magnetic transducer |
US4374403A (en) * | 1979-06-27 | 1983-02-15 | Matsushita Electric Industrial Co., Ltd. | Magnetic recording and reproducing system |
JPS57164416A (en) * | 1981-03-31 | 1982-10-09 | Fujitsu Ltd | Magnetic head |
EP0091812B1 (de) * | 1982-04-14 | 1987-11-19 | Matsushita Electric Industrial Co., Ltd. | Wiedergabekopf für senkrecht magnetisierte Aufzeichnungen |
JPS5971112A (ja) * | 1982-10-15 | 1984-04-21 | Comput Basic Mach Technol Res Assoc | 薄膜磁気ヘツド |
US4566050A (en) * | 1982-12-30 | 1986-01-21 | International Business Machines Corp. (Ibm) | Skew insensitive magnetic read head |
US4535375A (en) * | 1983-01-14 | 1985-08-13 | Magnetic Peripherals, Inc. | Magnetoresistive head |
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 |
JPS6059515A (ja) * | 1983-09-12 | 1985-04-05 | Seiko Epson Corp | 磁気ヘツド |
JPS60129915A (ja) * | 1983-12-15 | 1985-07-11 | Seikosha Co Ltd | 薄膜磁気ヘツド |
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 |
JPH0640371B2 (ja) * | 1984-02-20 | 1994-05-25 | 富士写真フイルム株式会社 | 薄膜磁気ヘツドのコイル構造 |
US4626946A (en) * | 1984-02-28 | 1986-12-02 | International Business Machines Corporation | Twin track vertical read-write head structure |
DE3527468A1 (de) * | 1984-08-01 | 1986-02-06 | Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka | Magnetkopf fuer quermagnetische aufzeichnung und wiedergabe |
JPS6185612A (ja) * | 1984-10-03 | 1986-05-01 | Toko Inc | 薄膜磁気ヘツド |
US4656546A (en) * | 1985-01-22 | 1987-04-07 | Digital Equipment Corporation | Vertical magnetic recording arrangement |
US4668913A (en) * | 1985-03-14 | 1987-05-26 | International Business Machines Corporation | Constant flux magneto resistive magnetic reluctance sensing apparatus |
US4649447A (en) * | 1985-08-15 | 1987-03-10 | International Business Machines | Combed MR sensor |
US4663685A (en) * | 1985-08-15 | 1987-05-05 | International Business Machines | Magnetoresistive read transducer having patterned longitudinal bias |
US4698711A (en) * | 1985-10-02 | 1987-10-06 | International Business Machines Corporation | Simplified, shielded twin-track read/write head structure |
US4695351A (en) * | 1986-07-10 | 1987-09-22 | Digital Equipment Corporation | Method for producing magnetic heads |
US4891725A (en) * | 1987-02-17 | 1990-01-02 | Magnetic Peripherals Inc. | Magnetoresistive sensor having antiferromagnetic exchange-biased ends |
US4803580A (en) * | 1987-02-17 | 1989-02-07 | Magnetic Peripherals Inc. | Double-gap magnetoresistive head having an elongated central write/shield pole completely shielding the magnetoresistive sensor strip in the read gap |
US4868698A (en) * | 1987-03-05 | 1989-09-19 | Matsushita Electric Industrial Co., Ltd. | Magnetic head |
US4825318A (en) * | 1987-06-05 | 1989-04-25 | Carnegie-Mellon University | Compound read/write element for rigid magnetic disk files |
EP0314172B1 (de) * | 1987-10-29 | 1994-03-09 | Fuji Photo Film Co., Ltd. | Film-Magnetkopf |
US4816947A (en) * | 1987-11-12 | 1989-03-28 | International Business Machines | Single track vertical and horizontal recording read/write head design |
JPH01166309A (ja) * | 1987-12-23 | 1989-06-30 | Hitachi Ltd | 薄膜磁気ヘッド |
US4912584A (en) * | 1988-03-09 | 1990-03-27 | Digital Equipment Corporation | Method for fabricating magnetic recording poles |
US4931886A (en) * | 1988-06-29 | 1990-06-05 | Digital Equipment Corporation | Apparatus and methods to suppress perpendicular fields in longitudinal recording |
JPH0237513A (ja) * | 1988-07-27 | 1990-02-07 | Hitachi Ltd | 薄膜磁気ヘッド |
US5085935A (en) * | 1988-08-03 | 1992-02-04 | Digital Equipment Corporation | Flux spreading thin film magnetic devices |
US5089334A (en) * | 1988-08-03 | 1992-02-18 | Digital Equipment Corporation | Flux spreading thin film magnetic devices |
US5184267A (en) * | 1989-06-02 | 1993-02-02 | Digital Equipment Corporation | Transducer with improved inductive coupling |
EP0400793A3 (de) * | 1989-06-02 | 1991-01-23 | Quantum Corporation | Wandler mit induktiver Kopplung |
US5195005A (en) * | 1989-06-02 | 1993-03-16 | Digital Equipment Corporation | Tranducer with improved inductive coupling |
-
1991
- 1991-06-26 US US07/721,233 patent/US5311386A/en not_active Expired - Fee Related
-
1992
- 1992-06-12 SG SG1996004431A patent/SG47800A1/en unknown
- 1992-06-12 EP EP92305406A patent/EP0520656B1/de not_active Expired - Lifetime
- 1992-06-12 DE DE69228451T patent/DE69228451T2/de not_active Expired - Fee Related
- 1992-06-23 JP JP4164577A patent/JPH05234036A/ja active Pending
-
1994
- 1994-01-13 US US08/181,582 patent/US5428887A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH05234036A (ja) | 1993-09-10 |
EP0520656A3 (en) | 1993-09-01 |
SG47800A1 (en) | 1998-04-17 |
US5311386A (en) | 1994-05-10 |
US5428887A (en) | 1995-07-04 |
DE69228451D1 (de) | 1999-04-01 |
EP0520656B1 (de) | 1999-02-24 |
EP0520656A2 (de) | 1992-12-30 |
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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 |