IT1149228B - Trasduttore induttivo a sottile pellicola - Google Patents

Trasduttore induttivo a sottile pellicola

Info

Publication number
IT1149228B
IT1149228B IT25316/80A IT2531680A IT1149228B IT 1149228 B IT1149228 B IT 1149228B IT 25316/80 A IT25316/80 A IT 25316/80A IT 2531680 A IT2531680 A IT 2531680A IT 1149228 B IT1149228 B IT 1149228B
Authority
IT
Italy
Prior art keywords
thin film
inductive transducer
film inductive
transducer
thin
Prior art date
Application number
IT25316/80A
Other languages
English (en)
Other versions
IT8025316A0 (it
Inventor
Lubomyr Taras Romankiw
David Allen Tnompson
Original Assignee
Ibm
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ibm filed Critical Ibm
Publication of IT8025316A0 publication Critical patent/IT8025316A0/it
Application granted granted Critical
Publication of IT1149228B publication Critical patent/IT1149228B/it

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
    • G11B5/3113—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
    • G11B5/3116—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)
IT25316/80A 1979-10-18 1980-10-14 Trasduttore induttivo a sottile pellicola IT1149228B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/083,182 US4295173A (en) 1979-10-18 1979-10-18 Thin film inductive transducer

Publications (2)

Publication Number Publication Date
IT8025316A0 IT8025316A0 (it) 1980-10-14
IT1149228B true IT1149228B (it) 1986-12-03

Family

ID=22176703

Family Applications (1)

Application Number Title Priority Date Filing Date
IT25316/80A IT1149228B (it) 1979-10-18 1980-10-14 Trasduttore induttivo a sottile pellicola

Country Status (4)

Country Link
US (1) US4295173A (it)
AU (1) AU534383B2 (it)
CA (1) CA1135410A (it)
IT (1) IT1149228B (it)

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414554A (en) * 1980-07-21 1983-11-08 Ferix Corporation Magnetic imaging apparatus
JPS5828838A (ja) * 1981-08-14 1983-02-19 Comput Basic Mach Technol Res Assoc 薄膜磁気ヘッドの製造方法
JPS5845619A (ja) * 1981-09-09 1983-03-16 Hitachi Ltd 磁気抵抗効果型薄膜磁気ヘッド
US4404609A (en) * 1981-10-30 1983-09-13 International Business Machines Corporation Thin film inductive transducer for perpendicular recording
JPS58137120A (ja) * 1982-02-05 1983-08-15 Hitachi Ltd 薄膜磁気ヘツド
DE3204184A1 (de) * 1982-02-06 1983-08-11 Robert Bosch Gmbh, 7000 Stuttgart Duennschicht-mehrspur-magnetkopf hoher spurdichte
NL8200481A (nl) * 1982-02-09 1983-09-01 Philips Nv Magneetkop.
US4511942A (en) * 1982-05-07 1985-04-16 Computer & Communications Technology Corp. Automatic throat height control for film heads
JPS58212615A (ja) * 1982-06-04 1983-12-10 Hitachi Ltd 薄膜磁気ヘツド
JPS5971112A (ja) * 1982-10-15 1984-04-21 Comput Basic Mach Technol Res Assoc 薄膜磁気ヘツド
JPS5971115A (ja) * 1982-10-15 1984-04-21 Hitachi Ltd 磁気ヘッド
JPS59104717A (ja) * 1982-12-08 1984-06-16 Comput Basic Mach Technol Res Assoc 薄膜磁気ヘツドおよびその製造方法
US4503440A (en) * 1983-03-08 1985-03-05 Springer Gilbert D Thin-film magnetic writing head with anti-saturation back-gap layer
DE3346777A1 (de) * 1983-12-23 1985-07-04 Siemens AG, 1000 Berlin und 8000 München Duennschicht-magnetkopf zur senkrechten (vertikalen) aufzeichnung
JPS60177418A (ja) * 1984-02-23 1985-09-11 Victor Co Of Japan Ltd 垂直磁気記録再生用薄膜ヘツド及びその製造方法
DE3420746A1 (de) * 1984-06-04 1985-12-05 Siemens AG, 1000 Berlin und 8000 München Schichtweise aufgebauter magnetkopf fuer ein senkrecht zu magnetisierendes aufzeichnungsmedium
JPH07118057B2 (ja) * 1984-08-06 1995-12-18 富士写真フイルム株式会社 薄膜磁気ヘッドの製造方法
US4764834A (en) * 1985-03-22 1988-08-16 Applied Magnetics Corporation Thin film magnetic transducer having a separate magnetically conductive layer
DE3513431A1 (de) * 1985-04-15 1986-10-23 Siemens AG, 1000 Berlin und 8000 München Verfahren zur herstellung mindestens eines magnetkopfes in duennfilmtechnik
US4675986A (en) * 1985-07-29 1987-06-30 International Business Machines Electrical lapping guide for controlling the batch fabrication of thin film magnetic transducers
US4694368A (en) * 1986-01-10 1987-09-15 Read-Rite Corporation Thin film magnetic head with three superimposed coils
US5856898A (en) * 1988-02-29 1999-01-05 Nec Corporation Spiral coil pattern including same layer spiral patterns suitable for use in a thin film head
US4931886A (en) * 1988-06-29 1990-06-05 Digital Equipment Corporation Apparatus and methods to suppress perpendicular fields in longitudinal recording
US5089334A (en) * 1988-08-03 1992-02-18 Digital Equipment Corporation Flux spreading thin film magnetic devices
CA1334447C (en) * 1988-08-03 1995-02-14 Digital Equipment Corporation Perpendicular anisotropy in thin film devices
US5293360A (en) * 1989-03-09 1994-03-08 Canon Kabushiki Kaisha Magnetic field generating device
US5170303A (en) * 1990-04-30 1992-12-08 Seagate Technology Inc. Inductive thin film head having improved readback characteristics
US5142425A (en) * 1990-08-09 1992-08-25 Hewlett-Packard Company Disk drive in which magnetic head-to-disk capacitive coupling is eliminated
US5173826A (en) * 1991-06-03 1992-12-22 Read-Rite Corp. Thin film head with coils of varying thickness
KR940002769A (ko) * 1992-07-20 1994-02-19 다니엘 에이. 네펠라 박막자기헤드
US5361547A (en) * 1992-08-28 1994-11-08 International Business Machines Corporation Ultimate inductive head integrated lapping system
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
US5613293A (en) * 1995-06-07 1997-03-25 Seagate Technology, Inc. Method of making a smooth topography head/disk interface surface on a head with patterned pole
EP0830670A1 (en) * 1995-06-07 1998-03-25 Seagate Technology, Inc. Smooth topography head surface on a head with patterned pole
US6031695A (en) * 1997-09-05 2000-02-29 International Business Machines Corporation Combined read head and write head with non-magnetic electrically conductive layer on upper pole tip thereof
US6111724A (en) * 1998-04-10 2000-08-29 International Business Machines Corporation Method of making a magnetic write head with plated self-aligned zero throat height defining layer without reflective notching of a second pole tip
US6353511B1 (en) 1999-06-15 2002-03-05 Read-Rite Corporation Thin film write head for improved high speed and high density recording
US6348846B1 (en) 1999-10-14 2002-02-19 International Business Machines Corporation Filter circuit including system for tuning resonant structures to change resonant frequencies thereof
US7370403B1 (en) * 2000-06-06 2008-05-13 Taiwan Semiconductor Manufacturing Co., Ltd. Method of fabricating a planar spiral inductor structure having an enhanced Q value
KR20040045473A (ko) * 2001-10-05 2004-06-01 코닌클리케 필립스 일렉트로닉스 엔.브이. 디지털 광자기 신호 기록/판독 헤드를 제조하는 방법과 이방법에 따라 제조된 기록/판독 헤드
US8331058B2 (en) * 2004-05-28 2012-12-11 Hitachi Global Storage Technologies Netherlands B.V. Method and apparatus for providing a write head with an improved pole tip to improve overwrite and/or adjacent track interference
US7545602B1 (en) * 2005-07-26 2009-06-09 Sun Microsystems, Inc. Use of grating structures to control asymmetry in a magnetic sensor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190872A (en) * 1978-12-21 1980-02-26 International Business Machines Corporation Thin film inductive transducer

Also Published As

Publication number Publication date
IT8025316A0 (it) 1980-10-14
AU534383B2 (en) 1984-01-26
CA1135410A (en) 1982-11-09
AU6316380A (en) 1981-04-30
US4295173A (en) 1981-10-13

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19971028