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    MAGNETIC DISC AND PROCESS FOR PRODUCING IT
    1.
    发明专利
    MAGNETIC DISC AND PROCESS FOR PRODUCING IT 未知

    公开(公告)号：DE3473958D1

    公开(公告)日：1988-10-13

    申请号：DE3473958

    申请日：1984-10-31

    Applicant: IBM DEUTSCHLAND ,  IBM

    Inventor： BANDARA UPOLI DR ,  HINKEL HOLGER DR ,  STEINER WERNER ,  TRIPPEL GERHARD DR

    IPC: G11B5/708 ,  G11B5/712

    Abstract: In a magnetic disc consisting of a magnetic layer comprising a binder, magnetic particles, e.g. gamma-Fe2O3, and particles of an abrasion-resistant material, on a substrate, the abrasion-resistant particles are encased in a layer which reinforces the bonding to the binder. Pref. the dia. of the abrasion-resistant particles (I) is considerably less than the thickness of the magnetic layer. (I) consist of a hard ceramic, pref. Al2O3, SiC or Si nitride, and the encasing layer is of SiO2/Al2O3; or (I) may be a hard oxide, e.g. Al2O3, with OH gps. on the particle surfaces, and the encasing layer is of 'Teflon' (RTM). The 'Teflon' casing may be bonded chemically to (I) through a siloxane bridge and opt. an initiator residue, and to the binder, consisting of an epoxy resin, a polyurethane or a melamine resin, through an amine bridge.

    MAGNETIC DISC AND PROCESS FOR PRODUCING IT
    3.
    发明专利
    MAGNETIC DISC AND PROCESS FOR PRODUCING IT 未知

    公开(公告)号：DE3470811D1

    公开(公告)日：1988-06-01

    申请号：DE3470811

    申请日：1984-10-31

    Applicant: IBM DEUTSCHLAND ,  IBM

    Inventor： BRISKA MARIAN ,  ELSNER GERHARD DR ,  HINKEL HOLGER DR

    IPC: G11B5/842 ,  G11B5/66 ,  G11B5/708 ,  G11B5/73 ,  G11B5/84 ,  G11B5/855 ,  G11B5/704

    Abstract: A magnetic recording disk comprises a magnetic layer consisting of a binder and magnetic particles, a silicon substrate and abrasion-resistant material formed on the silicon substrate. The abrasion-resistant material is in the form of elevations which protrude from the silicon substrate and whose surface is coplanar with the surface of the magnetic layer. The abrasion-resistant elevations are formed on the substrate in a predetermined uniform distribution either after the surface of the substrate has been blanket doped and/or covered with a layer comprising aluminum as a main component, by tempering and optionally oxidizing; or after the surface of the substrate has been selectively doped, by etching off the undoped regions of the surface of the substrate.

    METHOD OF MANUFACTURING A MAGNETIC HEAD FLYING BODY
    4.
    发明专利
    METHOD OF MANUFACTURING A MAGNETIC HEAD FLYING BODY 未知

    公开(公告)号：DE3376036D1

    公开(公告)日：1988-04-21

    申请号：DE3376036

    申请日：1983-08-17

    Applicant: IBM DEUTSCHLAND ,  IBM

    Inventor： HINKEL HOLGER DR ,  KAUS GERHARD DR ,  KUNZEL ULRICH DR ,  SCHMID GERHARD DR

    IPC: G11B5/10 ,  G11B5/187 ,  G11B5/31 ,  G11B5/60 ,  G11B21/21 ,  G11B5/127

    Abstract: The magnetic head block is made from a flat workpiece with one of its longitudinal side faces provided with a series of pairs of magnetic heads (12) each haVing associated conductor leads. Between each two adjacent pairs of magnetic heads (12) a transverse separation slit is formed and a transverse recess (9) if formed between the heads (12) of each pair to provide the two slide runners (11). The latter are angle downwards at the end of the block opposite to the magnetic heads (12). For mfr. of the slide runners (11) the surface of the aluminium workpiece (1) is provided with an Al oxide layer with a thickness of at least 1mm, used as a mask for etching the transVerse recesses (9) which have a depth of at least 10 microns.

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