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    METHOD OF FORMING PROTECTING FILM ON SUR- FACE OF AIR BEARING OF SLIDER IN MAGNETIC RECORDING DISK FILE
    3.
    发明专利
    METHOD OF FORMING PROTECTING FILM ON SUR- FACE OF AIR BEARING OF SLIDER IN MAGNETIC RECORDING DISK FILE 失效

    公开(公告)号：JPH03120610A

    公开(公告)日：1991-05-22

    申请号：JP22013990

    申请日：1990-08-23

    Applicant: IBM

    Inventor： HERUMAN EBARUTO BUREITSUHI ,  RUISU PATSUDEIRA FURANKO ,  IAN RUISU SANDAASU

    IPC: G11B5/72 ,  G11B5/40 ,  G11B5/60 ,  G11B21/21 ,  G11B33/14

    Abstract: PURPOSE: To improve the durability at the boundary between the head and disk of a disk file by forming relatively thin carbon protective films on the air bearing surfaces of a slider. CONSTITUTION: The assembled disk file is maintained in an environment having relative humidity(RH) higher than about 30% and is subjected to cycles of on/off at frequencies sufficient for maintaining the slider in the state of maintaining the contact with the disk provided with the carbon protective films. As a result of such start and stop cycles, the carbon is moved from the disk provided with the carbon protective films to the air bearing surfaces of the slider until the thickness thereof is made smaller than about 50mμ. The carbon films are adhered to the air bearing surfaces of the slider in such a manner and, thereafter, the disk file is maintained at the relatively low humidity, by which the operation is made possible without impairing the durability of the disk. As a result, the durability at the boundary surface between the head and disk of the disk file is improved.

    BUBBLE DEVICE
    4.
    发明专利
    BUBBLE DEVICE 失效

    公开(公告)号：JPS58105481A

    公开(公告)日：1983-06-23

    申请号：JP15972782

    申请日：1982-09-16

    Applicant: IBM

    Inventor： RICHIYAADO JIYOOJI HAAKO ,  KOOCHIYAN JIYU ,  IAN RUISU SANDAASU

    IPC: G11C11/14 ,  G11C19/08

    Abstract: A swap gate for ion-implanted contiguous disk bubble devices using folded minor loops is disclosed. The bubble device has a major loop, a folded minor loop and a swap element positioned between the major loop and the folded end of the minor loop. The swap element has a first portion for interchanging bubbles with the major loop, a second portion for receiving bubbles from a first region of the folded end of the minor loop, and a third portion for transferring bubbles from the first portion to a second region of the folded end of the minor loop. The folded end of the minor loop also has a third region positioned between the first and second regions to form two bubble storage locations. The bubble device has a conductor associated with the major loop and the first portion of the swap element to form a first transfer gate. The device also includes a second conductor associated with the folded minor loop and the second portion of the swap element to form a second transfer gate. The third portion of the swap element combines with the folded minor loop to form a merge element. In a preferred embodiment, the device has a quadruple period major loop which transfers a block of data into a single bit position on each of the minor loops.

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