JPS56111120A - Manufacture for thin film magnetic head - Google Patents

Manufacture for thin film magnetic head

Info

Publication number
JPS56111120A
JPS56111120A JP1010080A JP1010080A JPS56111120A JP S56111120 A JPS56111120 A JP S56111120A JP 1010080 A JP1010080 A JP 1010080A JP 1010080 A JP1010080 A JP 1010080A JP S56111120 A JPS56111120 A JP S56111120A
Authority
JP
Japan
Prior art keywords
hole
gap
depth
thin film
layer
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.)
Pending
Application number
JP1010080A
Other languages
Japanese (ja)
Inventor
Ritsu Imanaka
Hiroji Kawakami
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.)
Hitachi Ltd
Original Assignee
Hitachi 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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1010080A priority Critical patent/JPS56111120A/en
Publication of JPS56111120A publication Critical patent/JPS56111120A/en
Pending 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
    • 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
    • G11B5/3166—Testing or indicating in relation thereto, e.g. before the fabrication is completed

Abstract

PURPOSE:To obtain accurate depth of gap, by providing a polishing mark specifying the depth of gap with the 2nd nonmagnetic substance layer with a through-hole, on the formation of the 1st magnetic substance layer of thin film magnetic head on the substrate. CONSTITUTION:In forming a composite body with a thin film magnetic head H and a polish mark M on a substrate 1, after forming the 1st magnetic substance 2, the 1st nonmagnetic substance layer 3 being the gap is formed and the 2nd nonmagnetic substance layer 5 is formed. Then, a through-hole b2 is provided and a magnetic substance body 6 covering the hole b2 and the layer 5 is formed. The rear edge a2 of the hole b2 of the mark M is made in coincidence with the polish end position Xe. The position Xe is apart from the position a1 specifying the depth of the Ld by a given gap depth Ld. Since the hole b2 can be formed with the gap forming hole b1, no position shift is made to the position a1 and the ridge a2. Further, on the way of polishment, since the observation can be made if the magnetic substance layer 6 of the through-hole b2 is visible at the position Xe at the end of polishment and at the position of X1 or if the layer 5 is visible with the hole b2 polished, accurate depth of gap Ld can be obtained.
JP1010080A 1980-02-01 1980-02-01 Manufacture for thin film magnetic head Pending JPS56111120A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1010080A JPS56111120A (en) 1980-02-01 1980-02-01 Manufacture for thin film magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1010080A JPS56111120A (en) 1980-02-01 1980-02-01 Manufacture for thin film magnetic head

Publications (1)

Publication Number Publication Date
JPS56111120A true JPS56111120A (en) 1981-09-02

Family

ID=11740894

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1010080A Pending JPS56111120A (en) 1980-02-01 1980-02-01 Manufacture for thin film magnetic head

Country Status (1)

Country Link
JP (1) JPS56111120A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63253514A (en) * 1987-04-10 1988-10-20 Canon Electronics Inc Manufacture of thin-film magnetic head
US5305559A (en) * 1992-05-12 1994-04-26 Ngk Insulators, Ltd. Method of grinding core blank for magnetic heads, using markers for determining grinding depth for nominal magnetic gap depth

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63253514A (en) * 1987-04-10 1988-10-20 Canon Electronics Inc Manufacture of thin-film magnetic head
US5305559A (en) * 1992-05-12 1994-04-26 Ngk Insulators, Ltd. Method of grinding core blank for magnetic heads, using markers for determining grinding depth for nominal magnetic gap depth

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