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    SUBSTRATE FOR MAGNETIC DISK
    72.
    发明专利
    SUBSTRATE FOR MAGNETIC DISK 失效

    公开(公告)号：JPH0562145A

    公开(公告)日：1993-03-12

    申请号：JP22286991

    申请日：1991-09-03

    Applicant: KAO CORP

    Inventor： YAMAUCHI MICHIHIDE ,  ISOBE TSUTOMU

    IPC: G11B5/66 ,  C04B35/52 ,  C08L61/06 ,  G11B5/73 ,  G11B5/733

    Abstract: PURPOSE:To allow a layer formed on a substrate to strongly adhere to the substrate. CONSTITUTION:A complex material in which copper is uniformly dispersed in vitreous carbon is formed by baking a platy body obtained by hot forming a mixture of phenol resin and copper-porphyrin complex. This composite material, is formed and machined to a substrate. Then a Cr film is formed on the substrate by sputtering.

    PRODUCTION OF THIN-FILM MAGNETIC RECORDING MEDIUM
    73.
    发明专利
    PRODUCTION OF THIN-FILM MAGNETIC RECORDING MEDIUM 失效

    公开(公告)号：JPH04360021A

    公开(公告)日：1992-12-14

    申请号：JP13502191

    申请日：1991-06-06

    Applicant: KAO CORP

    Inventor： ISOBE TSUTOMU ,  YAMAUCHI MICHIHIDE

    IPC: G11B5/84

    Abstract: PURPOSE:To improve the durability of the thin-film magnetic recording medium. CONSTITUTION:After the films of a substrate layer and a thin-film magnetic layer are continuously formed in chambers 3B, 3C of a sputtering device 3, a substrate 1 held by a substrate holder 2 is cooled down to

    SLIDE CONTACT PARTS FOR FLEXIBLE MAGNETIC DISK AND MANUFACTURE THEREOF
    75.
    发明专利
    SLIDE CONTACT PARTS FOR FLEXIBLE MAGNETIC DISK AND MANUFACTURE THEREOF 失效

    公开(公告)号：JPH0340264A

    公开(公告)日：1991-02-21

    申请号：JP17535289

    申请日：1989-07-05

    Applicant: KAO CORP

    Inventor： ISOBE TSUTOMU ,  ISHIKAWA ATSUSHI ,  YAMAUCHI MICHIHIDE

    IPC: G11B17/34

    Abstract: PURPOSE:To stably travel a flexible magnetic disk, to acquire a satisfactory recording and reproducing characteristic and to prevent the flexible magnetic disk from being damaged by specifying shapes and the coarseness of surfaces for the two regulating faces of slide contact parts. CONSTITUTION:Slide contact parts 2 are provided to face to a magnetic head 3 with a disk 1 between and equipped with a recessed part 12, which is extended to face to this magnetic head 3 in the moving range of the magnetic head 3, first regulating face 13 on the upstream side of a rotating direction and second regulating face 14 on a downstream side. The width of the second regulating face in the rotating direction is made less than 3mm and both end parts on the cross section of the second regulating face 14 are formed so that a curvature radius can be less than 1mm. Further, the coarseness of the surfaces for the regulating parts of the first and second regulating face 13 and 14 is made less than 0.5mum in the average coarseness of a central line. Accordingly, projections are removed in the change corner parts of end parts on the both regulating faces 13 and 14 and the surfaces are made smooth. Thus, damage to the disk is prevented and durability is improved.

    MAGNETIC DISK DEVICE
    77.
    发明专利
    MAGNETIC DISK DEVICE 失效

    公开(公告)号：JPH02267770A

    公开(公告)日：1990-11-01

    申请号：JP8924589

    申请日：1989-04-07

    Applicant: KAO CORP

    Inventor： ISHIKAWA ATSUSHI ,  YAMAUCHI MICHIHIDE ,  ISOBE TSUTOMU

    IPC: G11B17/34

    Abstract: PURPOSE:To diminish variations of an abutting position on a flexible magnetic disk against a magnetic head by making a radius curvature of a corner part of a recessed groove of a sliding part, which is abutted on its upstream side with the disk, less than a specific value. CONSTITUTION:The magnetic head 3 is capable of moving in a radius direction with a center of a driving shaft 4, and the sliding part 2 is formed with the recessed groove 22 which is opened in the inside direction of the rotational surface opposite to a movable range of the head 3. Then, this part 2 is given a round having the radius of curvature of

    MANUFACTURE OF TAPE CASSETTE AND ITS SLIDING SHEET
    79.
    发明专利
    MANUFACTURE OF TAPE CASSETTE AND ITS SLIDING SHEET 失效

    公开(公告)号：JPH01125781A

    公开(公告)日：1989-05-18

    申请号：JP28479687

    申请日：1987-11-10

    Applicant: KAO CORP

    Inventor： YAMAUCHI MICHIHIDE ,  WATANABE HIDETOSHI ,  ISOBE TSUTOMU

    IPC: G11B23/087

    Abstract: PURPOSE:To lower the coefficient of friction of a tape, to reduce an electrification property, and to improve a various kinds of characteristics such as a traveling characteristic or a reproducing characteristic by forming a carbon thin film on the base film of a sliding sheet by a method by way of sputtering or another process of gaseous phase. CONSTITUTION:The carbon thin film 3 is formed on the base film of at least a part of the sliding sheet being connected slidably to the edge of the tape 6 wound on cassette 4 and 5 in a case by a physical thin film forming method by way of the process of gaseous phase of a carbon material. The physical thin film forming method in this case is the method by way of the sputtering, and it is desirable to use a glass shape carbon material in its target. In such a way, appearance looks fine, and the coefficient of friction at the time of sliding with the tape can be lowered, and the electrification property can be reduced, and plastic deformation can be prevented from occurring, and a various kinds of characteristics such as the traveling characteristic or the reproducing characteristic of the tape can be improved.

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