公开(公告)号：DE3585914D1

公开(公告)日：1992-05-27

申请号：DE3585914

申请日：1985-11-26

Applicant: IBM

Inventor： SCHMIDT LAURENCE JOSEPH ,  SEVERSON RANDALL LEWIS ,  TUFTY LYLE RICK ,  VOSS STEVEN HARRY

IPC: G11B25/04 ,  G11B17/038 ,  G11B17/08 ,  G11B23/00

公开(公告)号：DE3577489D1

公开(公告)日：1990-06-07

申请号：DE3577489

申请日：1985-02-22

Applicant: IBM

Inventor： COLLINS DAVID WHINERY ,  JOHNSON JOEL SWENUM ,  SCHMIDT LAURENCE JOSEPH ,  SIVERLING MICHAEL MC HUGH ,  WENTINK WILLIAM STEWART

IPC: G11B21/02 ,  G01B11/00 ,  G11B5/455 ,  G11B5/48 ,  G11B5/56 ,  G11B33/10

Abstract: An optical tool (9) is disclosed which permits a sequence of aligned transducer gaps to be positioned parallel to the axis of a disk file. The tool is surfaced with transparent material (16, 17, 18), has a thickness the same as the disk or disks of a disk stack being simulated and presents an etched alignment grid (17) at the interface surface between transducer and tool. The virtually common plane of the transducer gap and etched grid substantially eliminates parallax and the unfilled etched grid permits the gap to be seen, whether aligned with the transparent unetched surface or the translucent etched surface portion. The use of inclined mirrored surfaces (16) underlying the grid permits alignment to be effected using a bright field microscope and observing from a direction rotated 90 degrees from a line perpendicular to the grid to enable alignment of transducer gaps confronting one another at opposite sides of the disk.

公开(公告)号：DE3578956D1

公开(公告)日：1990-09-06

申请号：DE3578956

申请日：1985-04-30

Applicant: IBM

Inventor： VOSS STEVEN HARRY ,  NEUBAUER JERRY LEE ,  SCHMIDT LAURENCE JOSEPH

IPC: G11B17/038 ,  G11B23/00 ,  G11B33/14