ES487049A1 - Un dispositivo transductor inductivo de pelicula delgada perfeccionado - Google Patents
Un dispositivo transductor inductivo de pelicula delgada perfeccionadoInfo
- Publication number
- ES487049A1 ES487049A1 ES487049A ES487049A ES487049A1 ES 487049 A1 ES487049 A1 ES 487049A1 ES 487049 A ES487049 A ES 487049A ES 487049 A ES487049 A ES 487049A ES 487049 A1 ES487049 A1 ES 487049A1
- Authority
- ES
- Spain
- Prior art keywords
- polar
- cylinder head
- end region
- head structure
- transducer
- 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
- G11B5/127—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
- G11B5/3109—Details
- G11B5/3116—Shaping of layers, poles or gaps for improving the form of the electrical signal transduced, e.g. for shielding, contour effect, equalizing, side flux fringing, cross talk reduction between heads or between heads and information tracks
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
Un dispositivo transductor inductivo de película delgada perfeccionado, para grabar y leer transiciones magnéticas en una pista seleccionable de una pluralidad de pistas en un medio de registro magnético, siendo dicho transductor del tipo que comprende dos capas de un material magnético formantes de una estructura de culata que es activada por una bobina de conductor, caracterizado dicho transductor por el hecho de que dicha estructura de culata, junto a uno (primero) de sus extremos, comprende una región de extremo o apéndice polar que incluye una porción que es de una anchura prefijadas, substancialmente constante, y de un espesor preseleccionado substancialmente constante, no excediendo dicha anchura prefijada de la anchura de una pista del medio de registro, y extendiendose dicha región de extremo o apéndice polar en una distancia relativamente corta, normal al medio magnético, para así llevar al máximo la resolución de transiciones durante la grabación; y por el de que dicha estructurade culata comprende una región posterior que se une a dicha región de extremo o apéndice polar y aumenta de anchura a partir de dicha anchura prefijada, y tiene un entrehierro posterior substancialmente centrado junto a su extremidad más ancha, siendo el espesor de las capas de material magnético, en dicha región posterior, mayor que el espesor de las capas en dicha porción de dicha región de extremo o apéndice polar, para así contrarrestar u oponerse a la saturación de la estructura de culata con la corriente aplicada, y reforzar el rendimiento del transductor, mediante el aumento del área de la sección recta de la estructura de culata.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/972,104 US4190872A (en) | 1978-12-21 | 1978-12-21 | Thin film inductive transducer |
Publications (1)
Publication Number | Publication Date |
---|---|
ES487049A1 true ES487049A1 (es) | 1980-09-16 |
Family
ID=25519165
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES487049A Expired ES487049A1 (es) | 1978-12-21 | 1979-12-19 | Un dispositivo transductor inductivo de pelicula delgada perfeccionado |
Country Status (9)
Country | Link |
---|---|
US (1) | US4190872A (es) |
EP (1) | EP0012912B1 (es) |
JP (1) | JPS5584019A (es) |
AU (1) | AU526069B2 (es) |
BR (1) | BR7908411A (es) |
CA (1) | CA1127298A (es) |
DE (1) | DE2961724D1 (es) |
ES (1) | ES487049A1 (es) |
ZA (1) | ZA796366B (es) |
Families Citing this family (72)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2455330A1 (fr) * | 1979-04-25 | 1980-11-21 | Cii Honeywell Bull | Dispositif magnetique de transduction a magnetoresistances |
US4353102A (en) * | 1979-07-04 | 1982-10-05 | Matsushita Electric Industrial Co., Ltd. | Thin-film magnetic head |
US4295173A (en) * | 1979-10-18 | 1981-10-13 | International Business Machines Corporation | Thin film inductive transducer |
JPS5674811A (en) * | 1979-11-20 | 1981-06-20 | Matsushita Electric Ind Co Ltd | Magnetic head |
US4375657A (en) * | 1980-11-03 | 1983-03-01 | Brock George W | Magnetic head assembly |
JPS57117117A (en) * | 1981-01-09 | 1982-07-21 | Matsushita Electric Ind Co Ltd | Thin film magnetic head |
US4458279A (en) * | 1981-03-23 | 1984-07-03 | Magnex Corporation | Thin film transducer and method of making same |
JPS5819717A (ja) * | 1981-07-30 | 1983-02-04 | Fujitsu Ltd | 垂直磁化記録再生用ヘッド |
JPS5819716A (ja) * | 1981-07-27 | 1983-02-04 | Hitachi Ltd | 薄膜磁気ヘツドおよびその製造方法 |
US4404609A (en) * | 1981-10-30 | 1983-09-13 | International Business Machines Corporation | Thin film inductive transducer for perpendicular recording |
JPS58105025U (ja) * | 1982-01-07 | 1983-07-16 | 日本ビクター株式会社 | マルチトラツク磁気ヘツド |
US4458280A (en) * | 1982-01-18 | 1984-07-03 | International Business Machines Corporation | Servo writing transducer design and writing method |
US4490766A (en) * | 1982-03-22 | 1984-12-25 | International Business Machines Corporation | Magnetic recording disk cleaning using controlled actuator motion |
JPS5971115A (ja) * | 1982-10-15 | 1984-04-21 | Hitachi Ltd | 磁気ヘッド |
JPS5971112A (ja) * | 1982-10-15 | 1984-04-21 | Comput Basic Mach Technol Res Assoc | 薄膜磁気ヘツド |
US4581663A (en) * | 1982-11-02 | 1986-04-08 | Nec Corporation | Buried servo recording system having dual transducers |
US4593334A (en) * | 1983-05-02 | 1986-06-03 | International Business Machines Corporation | Thin film transducer |
US4589042A (en) * | 1983-06-27 | 1986-05-13 | International Business Machines Corporation | Composite thin film transducer head |
FR2559294B1 (fr) * | 1984-02-03 | 1988-08-12 | Commissariat Energie Atomique | Nouvelle tete magnetique d'ecriture et de lecture pour enregistrement perpendiculaire et son procede de fabrication |
DE3501810A1 (de) * | 1985-01-21 | 1986-07-24 | Siemens AG, 1000 Berlin und 8000 München | Duennschicht-magnetkopf mit einem doppelspalt fuer ein senkrecht zu magnetisierendes aufzeichnungsmedium |
DE3566848D1 (en) * | 1984-05-04 | 1989-01-19 | Siemens Ag | Thin-layer double-gap magnetic head for a perpendicularly magnetized recording medium |
KR940004986B1 (ko) * | 1984-08-27 | 1994-06-09 | 가부시기가이샤 히다찌세이사꾸쇼 | 자성막의 제조방법 및 그것을 사용한 자기헤드 |
US4923574A (en) * | 1984-11-13 | 1990-05-08 | Uri Cohen | Method for making a record member with a metallic antifriction overcoat |
DE3570542D1 (en) * | 1984-12-21 | 1989-06-29 | Siemens Ag | Thin-film magnetic head for a recording medium to be perpendicularly magnetized |
ATE36088T1 (de) * | 1984-12-21 | 1988-08-15 | Siemens Ag | Duennfilm-magnetkopf auf einem nicht-magnetischen substrat zur senkrechten magnetisierung. |
US4644432A (en) * | 1985-01-28 | 1987-02-17 | International Business Machines | Three pole single element magnetic read/write head |
US4764834A (en) * | 1985-03-22 | 1988-08-16 | Applied Magnetics Corporation | Thin film magnetic transducer having a separate magnetically conductive layer |
US4675986A (en) * | 1985-07-29 | 1987-06-30 | International Business Machines | Electrical lapping guide for controlling the batch fabrication of thin film magnetic transducers |
EP0218445A3 (en) * | 1985-10-01 | 1989-08-30 | Sony Corporation | Thin film magnetic heads |
US4740855A (en) * | 1985-10-18 | 1988-04-26 | Siemens Aktiengesellschaft | Magnetic thin-film head having a main and an auxiliary pole for vertical magnetization |
EP0232505A1 (de) * | 1985-12-20 | 1987-08-19 | Siemens Aktiengesellschaft | Magnetische Speichereinrichtung mit einem senkrecht zu magnetisierenden Aufzeichnungsmedium |
JPS62173607A (ja) * | 1986-01-27 | 1987-07-30 | Hitachi Ltd | 薄膜磁気ヘツド |
US4819111A (en) * | 1986-08-29 | 1989-04-04 | Magnetic Peripheral Inc. | Thin film head with reduced cross section in the core for causing magnetic saturation in the leading leg's throat area |
EP0320687A1 (de) * | 1987-12-11 | 1989-06-21 | Siemens Aktiengesellschaft | Dünnfilm-Magnetkopf zur vertikalen Magnetisierung |
US4839197A (en) * | 1988-04-13 | 1989-06-13 | Storage Technology Corporation | Process for fabricating thin film magnetic recording heads having precision control of the width tolerance of the upper pole tip |
EP0387364A1 (de) * | 1989-03-13 | 1990-09-19 | Siemens Aktiengesellschaft | Dünnfilm-Magnetkopfeinheit |
US5236735A (en) * | 1989-05-27 | 1993-08-17 | Tdk Corporation | Method of producing a thin film magnetic head |
US5023738A (en) * | 1989-12-18 | 1991-06-11 | Seagate Technology, Inc. | Corrosion resistant magnetic recording read |
NL9001147A (nl) * | 1990-05-17 | 1991-12-16 | Philips Nv | Dunnefilm magneetkop. |
EP0459426B1 (en) * | 1990-05-31 | 1996-12-11 | Sony Corporation | Thin film magnetic head |
US5220471A (en) * | 1990-08-14 | 1993-06-15 | Tdk Corporation | Air bearing slider having a longitudinal groove in surface remote from recording medium |
US5059278A (en) * | 1990-09-28 | 1991-10-22 | Seagate Technology | Selective chemical removal of coil seed-layer in thin film head magnetic transducer |
US5240740A (en) * | 1990-11-26 | 1993-08-31 | Digital Equipment Corporation | Method of making a thin film head with minimized secondary pulses |
JPH04214205A (ja) * | 1990-12-12 | 1992-08-05 | Fuji Electric Co Ltd | 薄膜磁気ヘッドおよびその製造方法 |
US5264981A (en) * | 1991-08-14 | 1993-11-23 | International Business Machines Corporation | Multilayered ferromagnetic film and magnetic head employing the same |
EP0548511B1 (en) * | 1991-12-18 | 1999-09-01 | Hewlett-Packard Company | Thin film inductive transducer having improved write capability |
US5305165A (en) * | 1991-12-24 | 1994-04-19 | International Business Machines Corporation | Tribo-attractive contact data storage system |
JP2544563B2 (ja) * | 1992-06-19 | 1996-10-16 | 株式会社日立製作所 | 薄膜磁気ヘッド及び磁気記録装置 |
JP2550829B2 (ja) * | 1992-06-19 | 1996-11-06 | 株式会社日立製作所 | 薄膜磁気ヘッド及び磁気記録装置 |
US5470491A (en) * | 1992-07-03 | 1995-11-28 | Mitsubishi Denki Kabushiki Kaisha | Process for producing a thin-film magnetic head having an insulation formed of a ladder-type silicone resin |
JPH0676238A (ja) * | 1992-07-08 | 1994-03-18 | Fuji Electric Co Ltd | 薄膜磁気ヘッド |
US5326429A (en) * | 1992-07-21 | 1994-07-05 | Seagate Technology, Inc. | Process for making studless thin film magnetic head |
US5820770A (en) | 1992-07-21 | 1998-10-13 | Seagate Technology, Inc. | Thin film magnetic head including vias formed in alumina layer and process for making the same |
JP2721783B2 (ja) * | 1992-08-19 | 1998-03-04 | インターナショナル・ビジネス・マシーンズ・コーポレイション | 薄膜磁気ヘッド変換器/懸架部の組合せシステム並びにその製造方法 |
JPH06168556A (ja) | 1992-08-25 | 1994-06-14 | Internatl Business Mach Corp <Ibm> | 変換器及び懸架部の組合せアセンブリ、及びその処理方法並びに該アセンブリを有するデータ処理装置 |
US5945007A (en) * | 1992-10-20 | 1999-08-31 | Cohen; Uri | Method for etching gap-vias in a magnetic thin film head and product |
US5621595A (en) * | 1992-10-20 | 1997-04-15 | Cohen; Uri | Pinched-gap magnetic recording thin film head |
CN1058799C (zh) * | 1993-01-08 | 2000-11-22 | 国际商业机器公司 | 薄膜磁传感器和悬架组件及其制造方法以及磁盘驱动组件 |
JPH0773412A (ja) * | 1993-06-24 | 1995-03-17 | Sanyo Electric Co Ltd | 薄膜磁気ヘッド |
US5452166A (en) * | 1993-10-01 | 1995-09-19 | Applied Magnetics Corporation | Thin film magnetic recording head for minimizing undershoots and a method for manufacturing the same |
US5462636A (en) * | 1993-12-28 | 1995-10-31 | International Business Machines Corporation | Method for chemically scribing wafers |
US5452164A (en) * | 1994-02-08 | 1995-09-19 | International Business Machines Corporation | Thin film magnetic write head |
US5710745A (en) * | 1995-04-07 | 1998-01-20 | Discovision Associates | Assembly having flux-directing return yoke for magneto-optical drive |
US5703740A (en) * | 1995-08-24 | 1997-12-30 | Velocidata, Inc. | Toroidal thin film head |
US6151194A (en) * | 1999-03-04 | 2000-11-21 | Storage Technology Corporation | Thin film inductive transducer with alumina gap positioned over coils |
US6304414B1 (en) | 1999-07-20 | 2001-10-16 | Read-Rite Corporation | Thin film magnetic write head having an ultra-low stack height |
JP2001319312A (ja) | 2000-05-10 | 2001-11-16 | Tdk Corp | 薄膜コイルおよびその製造方法ならびに薄膜磁気ヘッドおよびその製造方法 |
JP2002015405A (ja) * | 2000-06-28 | 2002-01-18 | Tdk Corp | 薄膜磁気ヘッドおよびその製造方法 |
US7100266B2 (en) * | 2001-05-16 | 2006-09-05 | Seagate Technology Llc | Method of forming a beveled writing pole of a perpendicular writing element |
US6906893B2 (en) | 2002-10-08 | 2005-06-14 | Hitachi Global Storage Technologies | Magnetic head coil and structure for protecting same during pole notch processing |
JP4990866B2 (ja) * | 2008-10-08 | 2012-08-01 | 昭和電工株式会社 | 磁気記録媒体の製造方法および磁気記録再生装置 |
JP6471975B2 (ja) | 2015-07-31 | 2019-02-20 | パナソニックIpマネジメント株式会社 | 三次元形状造形物の製造方法および三次元形状造形物 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3344237A (en) * | 1967-09-26 | Desposited film transducing apparatus and method op producing the apparatus | ||
CH405426A (de) * | 1961-12-21 | 1966-01-15 | Ibm | Magnetkopf zum Aufzeichnen und Ablesen von digitalen Signalen |
US3700827A (en) * | 1970-01-31 | 1972-10-24 | Nippon Electric Co | Magnetic head including thin magnetic film separated by a gap spacer |
JPS5038325B1 (es) * | 1970-12-25 | 1975-12-09 | ||
FR2191186B1 (es) * | 1972-07-03 | 1976-01-16 | Inf Ci Interna Fr | |
US4078300A (en) * | 1975-01-10 | 1978-03-14 | Compagnie Internationale Pour L'informatique | Method of making an integrated magnetic head having pole-pieces of a reduced frontal width |
FR2297475A1 (fr) * | 1975-01-10 | 1976-08-06 | Cii | Perfectionnements exportes aux structures de tetes magnetiques du type dit " integre " |
-
1978
- 1978-12-21 US US05/972,104 patent/US4190872A/en not_active Expired - Lifetime
-
1979
- 1979-11-09 JP JP14450179A patent/JPS5584019A/ja active Granted
- 1979-11-13 CA CA339,634A patent/CA1127298A/en not_active Expired
- 1979-11-19 AU AU52951/79A patent/AU526069B2/en not_active Ceased
- 1979-11-23 ZA ZA00796366A patent/ZA796366B/xx unknown
- 1979-12-10 DE DE7979105063T patent/DE2961724D1/de not_active Expired
- 1979-12-10 EP EP79105063A patent/EP0012912B1/en not_active Expired
- 1979-12-19 ES ES487049A patent/ES487049A1/es not_active Expired
- 1979-12-20 BR BR7908411A patent/BR7908411A/pt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CA1127298A (en) | 1982-07-06 |
JPS5584019A (en) | 1980-06-24 |
ZA796366B (en) | 1980-11-26 |
EP0012912B1 (en) | 1981-12-30 |
DE2961724D1 (en) | 1982-02-18 |
AU526069B2 (en) | 1982-12-16 |
BR7908411A (pt) | 1980-09-23 |
EP0012912A1 (en) | 1980-07-09 |
US4190872A (en) | 1980-02-26 |
JPH034964B2 (es) | 1991-01-24 |
AU5295179A (en) | 1980-06-26 |
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