DE2632371A1 - Magnetkopfanordnung zum lesen magnetischer informationen und ableiten von servoinformationen - Google Patents
Magnetkopfanordnung zum lesen magnetischer informationen und ableiten von servoinformationenInfo
- Publication number
- DE2632371A1 DE2632371A1 DE19762632371 DE2632371A DE2632371A1 DE 2632371 A1 DE2632371 A1 DE 2632371A1 DE 19762632371 DE19762632371 DE 19762632371 DE 2632371 A DE2632371 A DE 2632371A DE 2632371 A1 DE2632371 A1 DE 2632371A1
- Authority
- DE
- Germany
- Prior art keywords
- elements
- magnetoresistive
- magnetic
- magnetic head
- magnetoresistive element
- 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.)
- Withdrawn
Links
- 230000005291 magnetic effect Effects 0.000 title claims description 90
- 239000004020 conductor Substances 0.000 claims description 34
- 238000005070 sampling Methods 0.000 claims description 3
- 230000004907 flux Effects 0.000 description 21
- 230000007704 transition Effects 0.000 description 18
- 230000005415 magnetization Effects 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000036316 preload Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000889 permalloy Inorganic materials 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 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
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
- G11B5/3945—Heads comprising more than one sensitive element
- G11B5/3948—Heads comprising more than one sensitive element the sensitive elements being active read-out elements
- G11B5/3951—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged on several parallel planes
- G11B5/3954—Heads comprising more than one sensitive element the sensitive elements being active read-out elements the active elements being arranged on several parallel planes the active elements transducing on a single track
-
- 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
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/399—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures with intrinsic biasing, e.g. provided by equipotential strips
-
- 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
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Measuring Magnetic Variables (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/604,693 US4012781A (en) | 1975-08-14 | 1975-08-14 | Magnetoresistive read head assembly for servo operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2632371A1 true DE2632371A1 (de) | 1977-02-24 |
Family
ID=24420635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19762632371 Withdrawn DE2632371A1 (de) | 1975-08-14 | 1976-07-17 | Magnetkopfanordnung zum lesen magnetischer informationen und ableiten von servoinformationen |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4012781A (OSRAM) |
| JP (1) | JPS5223925A (OSRAM) |
| CA (1) | CA1068401A (OSRAM) |
| DE (1) | DE2632371A1 (OSRAM) |
| FR (1) | FR2321169A1 (OSRAM) |
| GB (2) | GB1539174A (OSRAM) |
| IT (1) | IT1063687B (OSRAM) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0113980A1 (en) * | 1982-12-16 | 1984-07-25 | Sony Corporation | Magnetic transducer heads utilising magnetoresistance effect |
| EP0242887A3 (en) * | 1982-11-02 | 1988-01-07 | Nec Corporation | Buried servo recording system having dual transducers |
Families Citing this family (66)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52137371A (en) * | 1976-05-13 | 1977-11-16 | Fujitsu Ltd | Position control system |
| JPS54157610A (en) * | 1978-05-26 | 1979-12-12 | Sony Corp | Magnetic head |
| US4447839A (en) * | 1980-10-28 | 1984-05-08 | Compagnie Internationale Pour L'informatique Cii-Honeywell Bull (Societe Anonyme) | Magnetoresistant transducer |
| JPS5832221A (ja) * | 1981-08-17 | 1983-02-25 | Sony Corp | 磁気抵抗効果型磁気ヘツド |
| US4520413A (en) * | 1982-04-13 | 1985-05-28 | Minnesota Mining And Manufacturing Company | Integrated magnetostrictive-piezoelectric-metal oxide semiconductor magnetic playback head |
| US4533872A (en) * | 1982-06-14 | 1985-08-06 | Honeywell Inc. | Magnetic field sensor element capable of measuring magnetic field components in two directions |
| US4589041A (en) * | 1982-08-30 | 1986-05-13 | International Business Machines Corporation | Differential magnetoresistive sensor for vertical recording |
| US4535375A (en) * | 1983-01-14 | 1985-08-13 | Magnetic Peripherals, Inc. | Magnetoresistive head |
| US4599668A (en) * | 1983-06-15 | 1986-07-08 | Eastman Kodak Company | Inductively-coupled, thin-film M-R head |
| DE3613619A1 (de) * | 1985-04-26 | 1986-10-30 | Sharp K.K., Osaka | Duennfilm-magnetkopf |
| JPS62205511A (ja) * | 1986-03-05 | 1987-09-10 | Fuji Photo Film Co Ltd | 磁気ヘツド特性測定装置 |
| US4972286A (en) * | 1989-03-03 | 1990-11-20 | Seagate Technology, Inc. | Grounding pole structures in thin film mganetic heads |
| US5048175A (en) * | 1989-03-03 | 1991-09-17 | Seagate Technology, Inc. | Method for grounding pole structures in thin film magnetic heads |
| US5216560A (en) * | 1989-11-22 | 1993-06-01 | Hewlett-Packard Company | Stabilization of magnetoresistive sensors using the longitudinal field produced by the current in the contact leads |
| US5079663A (en) * | 1990-01-29 | 1992-01-07 | International Business Machines Corporation | Magnetoresistive sensor with track following capability |
| US5083112A (en) * | 1990-06-01 | 1992-01-21 | Minnesota Mining And Manufacturing Company | Multi-layer thin-film eas marker |
| US5390061A (en) | 1990-06-08 | 1995-02-14 | Hitachi, Ltd. | Multilayer magnetoresistance effect-type magnetic head |
| US5555142A (en) * | 1990-09-27 | 1996-09-10 | Kabushiki Kaisha Toshiba | Magnetic disk system |
| DE69126082T2 (de) * | 1990-09-27 | 1997-10-02 | Toshiba Kawasaki Kk | Magnetischer Kopf |
| JPH04178876A (ja) * | 1990-11-14 | 1992-06-25 | Hitachi Ltd | パーソナル情報表示システム |
| US5079831A (en) * | 1991-02-07 | 1992-01-14 | Applied Magnetics Corporation | Method of making a dual stripe magnetic head |
| US5260652A (en) * | 1992-03-25 | 1993-11-09 | Seagate Technology, Inc. | Magnetoresistive sensor with electrical contacts having variable resistive regions for enhanced sensor sensitivity |
| US5302461A (en) * | 1992-06-05 | 1994-04-12 | Hewlett-Packard Company | Dielectric films for use in magnetoresistive transducers |
| US5270892A (en) * | 1992-06-05 | 1993-12-14 | Hewlett-Packard Company | Conductor configuration for magnetoresistive transducers |
| US5309304A (en) * | 1992-06-05 | 1994-05-03 | Hewlett-Packard Company | Magnetoresistive transducer conductor configuration |
| DE69331895T2 (de) * | 1992-12-29 | 2002-12-19 | Eastman Kodak Co., Rochester | Magnetoresistiver Magnetfeldsensor mit sehr langem Wirkbereich |
| US5508868A (en) * | 1993-01-25 | 1996-04-16 | Read-Rite Corporation | Dual element magnetoresistive sensing head having in-gap flux guide and flux closure piece with particular connection of magnetoresistive sensing elements to differential amplifier |
| JPH06259714A (ja) * | 1993-03-09 | 1994-09-16 | Hitachi Ltd | 磁気ディスク装置 |
| US5440233A (en) * | 1993-04-30 | 1995-08-08 | International Business Machines Corporation | Atomic layered materials and temperature control for giant magnetoresistive sensor |
| US5388014A (en) * | 1993-09-10 | 1995-02-07 | Hewlett-Packard Company | Apparatus and method of sensing the position of a magnetic head |
| US5436773A (en) * | 1994-06-10 | 1995-07-25 | International Business Machines Corporation | Enhanced linearity range for magneto resistive transducer servo by changing the direction of the bias current |
| US5781365A (en) * | 1995-03-07 | 1998-07-14 | Cirrus Logic, Inc. | Sliding mode control of a magnetoresistive read head for magnetic recording |
| DE69616676T2 (de) * | 1995-07-18 | 2002-05-16 | Hewlett-Packard Co.(A Delaware Corporation), Palo Alto | Magnetoresistiver Aufnahmekopf |
| KR100274522B1 (ko) * | 1996-03-14 | 2001-01-15 | 니시무로 타이죠 | 멀티자기헤드및이것을구비한자기디스크장치 |
| US5953173A (en) * | 1996-09-17 | 1999-09-14 | International Business Machines Corporation | High CMRR and sensor-disk short-circuit protection device for dual element magnetoresistive heads |
| US5783460A (en) * | 1996-10-25 | 1998-07-21 | Headway Technologies, Inc. | Method of making self-aligned dual stripe magnetoresistive (DRMR) head for high density recording |
| US6104562A (en) * | 1997-04-03 | 2000-08-15 | International Business Machines Corporation | Multiple element transducer for magnetic recording |
| US6002554A (en) * | 1997-10-03 | 1999-12-14 | Storage Technology Corporation | Multitrack coupled element read head with support structure to eliminate shorting and method for manufacturing same |
| US6157510A (en) * | 1998-03-10 | 2000-12-05 | Maxtor Corporation | Magnetic storage device with multiple read elements which are offset laterally and longitudinally |
| US6266205B1 (en) | 1998-03-10 | 2001-07-24 | Maxtor Corporation | Parallel servo with ultra high bandwidth off-track detection |
| WO1999059145A1 (en) * | 1998-05-13 | 1999-11-18 | Storage Technology Corporation | Method for reading both high and low density signals with an mr head |
| US6606216B1 (en) | 1999-05-05 | 2003-08-12 | Maxtor Corporation | Transducer head with separate data and servo read elements |
| US7564656B2 (en) * | 2005-02-28 | 2009-07-21 | Hitachi Global Storage Technologies Netherlands B.V. | Integrated servo and read EMR sensor |
| EP2052245A2 (en) * | 2006-08-09 | 2009-04-29 | Koninklijke Philips Electronics N.V. | Magnetic sensor device on a microchip |
| JP4985522B2 (ja) * | 2008-03-28 | 2012-07-25 | Ｔｄｋ株式会社 | 磁界測定方法及び磁気センサ |
| US8139301B1 (en) | 2009-07-22 | 2012-03-20 | Western Digital (Fremont), Llc | Disk drive comprising a dual read element and delay circuitry to improve read signal |
| US8427144B2 (en) * | 2009-07-28 | 2013-04-23 | Tdk Corporation | Magnetic sensor that includes magenetoresistive films and conductors that combine the magnetoresistive films |
| US8698490B2 (en) * | 2010-12-15 | 2014-04-15 | Infineon Technologies Ag | Magnetoresistive angle sensors having conductors arranged in multiple planes |
| DE102011109838A1 (de) | 2011-05-27 | 2012-11-29 | J-Plasma Gmbh | Lichtleitfaser |
| US9431039B1 (en) | 2013-05-21 | 2016-08-30 | Western Digital (Fremont), Llc | Multiple sensor array usable in two-dimensional magnetic recording |
| US8891207B1 (en) | 2013-06-07 | 2014-11-18 | Western Digital (Fremont), Llc | Connection schemes for a multiple sensor array usable in two-dimensional magnetic recording |
| US9626992B2 (en) * | 2013-06-26 | 2017-04-18 | Marvell International Ltd. | Read assembly, data storage system, and methods of using the same |
| US8908333B1 (en) | 2013-08-13 | 2014-12-09 | Western Digital (Fremont), Llc | Shield designed for middle shields in a multiple sensor array |
| US9431032B1 (en) | 2013-08-14 | 2016-08-30 | Western Digital (Fremont), Llc | Electrical connection arrangement for a multiple sensor array usable in two-dimensional magnetic recording |
| US9135935B1 (en) | 2013-10-11 | 2015-09-15 | Western Digital Technologies, Inc. | Customized head gimbal assembly bonding skew angle for adjusting two-dimensional magnetic recording reader alignment |
| US9042058B1 (en) | 2013-10-17 | 2015-05-26 | Western Digital Technologies, Inc. | Shield designed for middle shields in a multiple sensor array |
| US9257145B1 (en) | 2013-11-27 | 2016-02-09 | Western Digital Technologies, Inc. | Disk drive measuring down-track spacing of read sensors |
| US8988812B1 (en) | 2013-11-27 | 2015-03-24 | Western Digital (Fremont), Llc | Multi-sensor array configuration for a two-dimensional magnetic recording (TDMR) operation |
| US8970988B1 (en) | 2013-12-31 | 2015-03-03 | Western Digital (Fremont), Llc | Electric gaps and method for making electric gaps for multiple sensor arrays |
| US9245556B2 (en) | 2014-03-10 | 2016-01-26 | Western Digital Technologies, Inc. | Disk drive employing multiple read elements to increase radial band for two-dimensional magnetic recording |
| US9070406B1 (en) | 2014-03-10 | 2015-06-30 | Western Digital Technologies, Inc. | Disk drive configuring one-dimensional and two-dimensional recording areas based on read element spacing |
| US9053727B1 (en) | 2014-06-02 | 2015-06-09 | Western Digital Technologies, Inc. | Disk drive opening spiral crossing window based on DC and AC spiral track error |
| US9013824B1 (en) | 2014-06-04 | 2015-04-21 | Western Digital Technologies, Inc. | Data storage device comprising dual read sensors and dual servo channels to improve servo demodulation |
| US9087527B1 (en) | 2014-10-28 | 2015-07-21 | Western Digital (Fremont), Llc | Apparatus and method for middle shield connection in magnetic recording transducers |
| US9786301B1 (en) | 2014-12-02 | 2017-10-10 | Western Digital (Fremont), Llc | Apparatuses and methods for providing thin shields in a multiple sensor array |
| US11276423B1 (en) | 2020-07-02 | 2022-03-15 | Seagate Technology Llc | Reader with a compensating layer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1165087B (de) * | 1961-08-08 | 1964-03-12 | Wolfgang Bogen | Magnetkopf |
| US3493694A (en) * | 1966-01-19 | 1970-02-03 | Ampex | Magnetoresistive head |
| FR2219482B1 (OSRAM) * | 1973-02-27 | 1978-03-03 | Cii | |
| NL7309590A (nl) * | 1973-07-10 | 1975-01-14 | Philips Nv | Inrichting voor het sturen van de positie van een magneetkop ten opzichte van een te volgen informatiespoor. |
| US3860965A (en) * | 1973-10-04 | 1975-01-14 | Ibm | Magnetoresistive read head assembly having matched elements for common mode rejection |
| US3864751A (en) * | 1973-10-04 | 1975-02-04 | Ibm | Induced bias magnetoresistive read transducer |
-
1975
- 1975-08-14 US US05/604,693 patent/US4012781A/en not_active Expired - Lifetime
-
1976
- 1976-06-25 IT IT24697/76A patent/IT1063687B/it active
- 1976-07-01 FR FR7620691A patent/FR2321169A1/fr active Granted
- 1976-07-17 DE DE19762632371 patent/DE2632371A1/de not_active Withdrawn
- 1976-07-20 JP JP51085690A patent/JPS5223925A/ja active Granted
- 1976-07-22 GB GB28928/78A patent/GB1539174A/en not_active Expired
- 1976-07-22 GB GB30563/76A patent/GB1536735A/en not_active Expired
- 1976-08-06 CA CA258,551A patent/CA1068401A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0242887A3 (en) * | 1982-11-02 | 1988-01-07 | Nec Corporation | Buried servo recording system having dual transducers |
| EP0113980A1 (en) * | 1982-12-16 | 1984-07-25 | Sony Corporation | Magnetic transducer heads utilising magnetoresistance effect |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2321169B1 (OSRAM) | 1978-05-05 |
| US4012781A (en) | 1977-03-15 |
| GB1539174A (en) | 1979-01-31 |
| JPS5223925A (en) | 1977-02-23 |
| IT1063687B (it) | 1985-02-11 |
| FR2321169A1 (fr) | 1977-03-11 |
| CA1068401A (en) | 1979-12-18 |
| JPS5732404B2 (OSRAM) | 1982-07-10 |
| GB1536735A (en) | 1978-12-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8139 | Disposal/non-payment of the annual fee |