DE68914314D1 - Markierung zur Auswertung von der Bearbeitungshöhe und Herstellungsverfahren eines Dünnfilm-Magnetkopfes. - Google Patents

Markierung zur Auswertung von der Bearbeitungshöhe und Herstellungsverfahren eines Dünnfilm-Magnetkopfes.

Info

Publication number
DE68914314D1
DE68914314D1 DE89105973T DE68914314T DE68914314D1 DE 68914314 D1 DE68914314 D1 DE 68914314D1 DE 89105973 T DE89105973 T DE 89105973T DE 68914314 T DE68914314 T DE 68914314T DE 68914314 D1 DE68914314 D1 DE 68914314D1
Authority
DE
Germany
Prior art keywords
marking
evaluating
thin
manufacturing process
magnetic head
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
Application number
DE89105973T
Other languages
English (en)
Other versions
DE68914314T2 (de
Inventor
Naoto Matono
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
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
Priority claimed from JP29182388A external-priority patent/JPH02137109A/ja
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Application granted granted Critical
Publication of DE68914314D1 publication Critical patent/DE68914314D1/de
Publication of DE68914314T2 publication Critical patent/DE68914314T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • 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
    • G11B5/3133—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure
    • G11B5/314—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure where the layers are extra layers normally not provided in the transducing structure, e.g. optical 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
    • G11B5/3103—Structure or manufacture of integrated heads or heads mechanically assembled and electrically connected to a support or housing
    • G11B5/3106—Structure or manufacture of integrated heads or heads mechanically assembled and electrically connected to a support or housing where the integrated or assembled structure comprises means for conditioning against physical detrimental influence, e.g. wear, contamination
    • 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
    • Y10T29/49036—Fabricating head structure or component thereof including measuring or testing
    • Y10T29/49037—Using reference point/surface to facilitate measuring
    • 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
    • Y10T29/49048—Machining magnetic material [e.g., grinding, etching, polishing]

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetic Heads (AREA)
DE68914314T 1988-04-06 1989-04-05 Markierung zur Auswertung von der Bearbeitungshöhe und Herstellungsverfahren eines Dünnfilm-Magnetkopfes. Expired - Fee Related DE68914314T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8443688 1988-04-06
JP29182388A JPH02137109A (ja) 1988-11-16 1988-11-16 薄膜磁気ヘッド

Publications (2)

Publication Number Publication Date
DE68914314D1 true DE68914314D1 (de) 1994-05-11
DE68914314T2 DE68914314T2 (de) 1994-10-27

Family

ID=26425482

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68914314T Expired - Fee Related DE68914314T2 (de) 1988-04-06 1989-04-05 Markierung zur Auswertung von der Bearbeitungshöhe und Herstellungsverfahren eines Dünnfilm-Magnetkopfes.

Country Status (5)

Country Link
US (1) US5056353A (de)
EP (1) EP0336395B1 (de)
KR (1) KR890016509A (de)
CA (1) CA1317672C (de)
DE (1) DE68914314T2 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5331495A (en) * 1990-06-11 1994-07-19 Fuji Photo Film Co., Ltd. Thin film magnetic head and methods for producing same
IL100910A (en) * 1991-02-12 1994-10-07 Hughes Aircraft Co Assessment of the degree of wear of objects
JPH04301205A (ja) * 1991-03-28 1992-10-23 Ngk Insulators Ltd 磁気ヘッド用コアチップ及びそれを用いた磁気ヘッド用コアスライダの製造法
US5815909A (en) * 1994-08-26 1998-10-06 Aiwa Research And Development, Inc. Method of making a thin film magnetic head including protected via connections through an electrically insulative substrate
US5579717A (en) * 1994-10-13 1996-12-03 International Business Machines Corporation Method of grinding thin-film magnetic heads using optical grinding markers
JPH08304010A (ja) * 1995-04-28 1996-11-22 Sony Corp デプスセンサー
JP3091404B2 (ja) * 1995-11-09 2000-09-25 富士通株式会社 磁気ヘッドの製造方法
US5742995A (en) * 1996-05-24 1998-04-28 Seagate Technology, Inc. Method to predict an accurate MR sensor dimension when viewed from abs
US5956564A (en) * 1997-06-03 1999-09-21 Ultratech Stepper, Inc. Method of making a side alignment mark
JP2005276359A (ja) * 2004-03-25 2005-10-06 Sony Corp 磁気ヘッド装置、回転ヘッド装置、磁気テープ装置、磁気ディスク装置、磁気記録方法
US7996986B2 (en) * 2009-02-13 2011-08-16 Seagate Technology Llc Apparatus for forming magnetic recording heads

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8200531A (nl) * 1982-02-12 1983-09-01 Philips Nv Magneetkop met gedeeltelijk uitgeetste wikkelopening.
JPS58177517A (ja) * 1982-04-09 1983-10-18 Trio Kenwood Corp 薄膜磁気ヘツドの製造方法
JPS61267913A (ja) * 1985-05-21 1986-11-27 Toshiba Corp 薄膜磁気ヘツド
JPS6222220A (ja) * 1985-07-22 1987-01-30 Sony Corp 薄膜磁気ヘツド
JPS6222219A (ja) * 1985-07-22 1987-01-30 Sony Corp 薄膜磁気ヘツド
JP2572213B2 (ja) * 1986-04-03 1997-01-16 富士写真フイルム株式会社 薄膜磁気ヘツド

Also Published As

Publication number Publication date
KR890016509A (ko) 1989-11-29
EP0336395A2 (de) 1989-10-11
US5056353A (en) 1991-10-15
CA1317672C (en) 1993-05-11
DE68914314T2 (de) 1994-10-27
EP0336395A3 (en) 1990-11-28
EP0336395B1 (de) 1994-04-06

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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