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    Method of manufacturing laminated structures
    1.
    发明授权
    Method of manufacturing laminated structures 失效
    制造层压结构的方法

    公开(公告)号：US3614830A

    公开(公告)日：1971-10-26

    申请号：US3614830D

    申请日：1969-02-28

    Applicant: IBM

    Inventor： BATE GEOFFREY ,  BROCK GEORGE W

    IPC: G11B5/11 ,  G11B5/147 ,  H01F27/24 ,  H01F41/02 ,  H01F7/06

    CPC classification number: H01F41/0233 ,  G11B5/147 ,  Y10T29/49048 ,  Y10T29/49055 ,  Y10T29/49078

    Abstract: A LAMINATED STRUCTURE, INCLUDING LAMINA OF METALLIC MAGNETICALLY PERMEABLE MATERIAL, CONSTRUCTED WITH EACH LAMINA SEPARATED FROM EACH NEXT ADJOINING LAMINA BY A THIN LAYER OF ELECTRICALLY NON-CONDUCTIVE MATERIAL, WITH THE EXCEPTION THAT EACH LAMINA IS JOINED AND INTERCONNECTED IN A RANDOM PATTERN THROUGH THE NON-CONDUCTIVE LAYER TO EACH ADJACENT LAMINA. THE INTERCONNECTIONS BETWEEN EACH PAIR OF LAMINAE COVER ABOUT 10%, OR LESS, OF EACH LAMINA''S SURFACE AREA. LAMINATED STRUCTURES OF THIS TYPE ARE PRODUCED BY PROVIDING A THIN, ELECTRICALLY NONCONDUCTIVE COATING UPON THE SURFACE OF METALLIC LAMINA, STACKING A PLURALITY OF COATED LAMINAE, INLCUDING MAGNETICALLY PERMEABLE LAMINA, IN REGISTERED CONTACTING RELATIONSHIP, AND THEN HEATING THE STACKED LAMINAE AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO SIMULTANEOUSLY ANNEAL THE MAGNETICALLY PERMEABLE MATERIAL AND CAUSE EACH LAMINA TO BE DIFFSION BONDED THROUGH THE NON-CONDUCTIVE LAYER TO EACH ADJACENT LAMINA IN A RANDOM PATTERN COVERING ABOUT 10%, OR LESS, OF EACH LAMINA''S SURFACE AREA.

    Method and apparatus for testing batch fabricated magnetic heads during manufacture utilizing magnetic fields generated by other magnetic heads
    5.
    发明授权
    Method and apparatus for testing batch fabricated magnetic heads during manufacture utilizing magnetic fields generated by other magnetic heads 失效
    在其他磁头生成的磁场制造过程中测试批量制造的磁头的方法和装置

    公开(公告)号：US3706926A

    公开(公告)日：1972-12-19

    申请号：US3706926D

    申请日：1971-06-04

    Applicant: IBM

    Inventor： BARRAGER STEPHEN M ,  BATE GEOFFREY ,  SMITH SIDNEY H

    IPC: G11B5/31 ,  G01R35/00

    CPC classification number: G11B5/314 ,  G11B5/3166 ,  Y10T29/49004 ,  Y10T29/49036 ,  Y10T29/49046 ,  Y10T29/49048

    Abstract: Magnetic head elements are batch fabricated on areas of a substrate. During manufacture, and before final separation and processing of the areas into discrete multi-track magnetic heads, defective areas are identified for removal. An electric signal source subjects the head areas to a magnetic field which is detected as electric current in each head area. The detected current value in acceptable head areas falls within a predefined range. All head areas having a current outside the range are defined as defective. The magnetic field emanates from one set of head areas in the vicinity of another set of head areas being tested.

    Abstract translation: 磁头元件是在衬底的区域上批量制造的。 在制造期间，并且在将区域最终分离和处理成离散多磁道磁头之前，确定缺陷区域以便去除。 电信号源使头部区域受到在每个头部区域中被检测为电流的磁场。 可接受的头部区域中检测到的电流值落在预定范围内。 具有超出范围的电流的所有头部区域被定义为有缺陷的。 磁场从被测试的另一组头部区域附近的一组头部区域发出。

    Magneto-optic transducer
    6.
    发明授权
    Magneto-optic transducer 失效
    磁光转换器

    公开(公告)号：US3665431A

    公开(公告)日：1972-05-23

    申请号：US3665431D

    申请日：1970-06-25

    Applicant: IBM

    Inventor： ALSTAD JOHN K ,  ARMITAGE JOHN D JR ,  BATE GEOFFREY

    IPC: G02F1/09 ,  G11B11/105 ,  G11B5/30

    CPC classification number: G11B11/10547 ,  G02F1/09

    Abstract: Disclosed herein is a new magneto-optic transducer which orients the transfer film non-parallel to the record storage medium with only an edge of the transfer film adjacent the record storage medium. The magneto-optic transducer also provides a reflecting surface adjacent the surface of the record storage medium on either side of the transfer film so that the magneto-optic Kerr or Faraday Effect may be utilized with the transducer. Furthermore, the reflecting surface permits a focused light beam to be directed near the edge of the transfer film adjacent the storage medium.

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