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公开(公告)号：JPH10275330A
公开(公告)日：1998-10-13
申请号：JP7725197
申请日：1997-03-28
Applicant: IBM
Inventor： TANAKA HIDETSUGU , YAMAMOTO YOSHIO , HARADA YOSHINAO , CHIKASAWA TAKAO
Abstract: PROBLEM TO BE SOLVED: To reduce friction at the time of landing and thereby to enhance reliability of a disk driving device. SOLUTION: A laser zone texture 12a composed of a number of bumps 12c is provided in a region except regions facing to a minimum fly height region of a head slider at the time of landing within the landing zone 12 of the magnetic disk. Then the bumps 12c are not formed in a region facing to the minimum fly height region of the head slider to be bump-free zone 12b.
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公开(公告)号：JPH0935397A
公开(公告)日：1997-02-07
申请号：JP17710195
申请日：1995-07-13
Applicant: IBM
Inventor： SUZUKI HIROMASA , KIBASHI AKIRA , YAMAMOTO YOSHIO , ASANO HIDEO
IPC: G11B23/50 , G11B5/00 , G11B5/012 , G11B5/54 , G11B5/55 , G11B5/58 , G11B19/04 , G11B21/08 , G11B21/21 , G11B19/02
Abstract: PROBLEM TO BE SOLVED: To eliminate the elementary cause of a thermal asperity by repeatingly perform a one directional seeking operation and eliminating a projected matter while actively bringing the surface of the structural body of a head into contact with the projected matter. SOLUTION: A head slider 20 is inclined with respect to the rotational direction of a disk by the air pressure accompanied by the revolution of the disk. The head slider 20 is brought into contact with the projected matter 52 on the disk 18 at the point of an ABS surface 44 nearest to the disk. Besides, for example, the number of loopings is defined to be two, seeking operations are completed when the loopings are repeated two times and a retry, that is, a rereading operation is executed to confirm whether a normal reading operation is performed or not. When the projected matter is eliminated by these seeking operations, since a read signal becomes normal and errors are recovered, this device can move to an ordinary reading or writing operation.
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