Method and apparatus for reducing disk distortion under clamping

Details Method and apparatus for reducing disk distortion under clamping Method and apparatus for reducing disk distortion under clamping

1991-01-18

1991-07-09

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9912, G11B 1708, G11B 1702

Patent

active

050310623

ABSTRACT:
A method for assembling disks in a disk drive apparatus is disclosed, as well as the resultant assembly. The method reduces the occurrence of disk head crashes resulting from penetration of the air bearing on which the disk head rides because of one or more surface irregularities found in the disk surface at or near inner diameter portions of the disk which lead to rippling of the disk surface. The elimination or reduction in size of the surface irregularities is achieved using a flowable filler material that is received by the surface irregularities and remains therein after the disk or disks are clamped to a spindle. The filler material is preferably an adhesive and it reduces any differences in the surface topography of the disk and the accompanying clamping-related parts. Bowing of the disk at its inner diameter portions due to uneven clamping forces is also reduced in the present invention. The resultant assembly has particular utility for use with smaller diameter disks having a diameter of about 95 mm or less.

REFERENCES:
patent: 3745543 (1973-07-01), King
patent: 4616278 (1986-09-01), Yamaguchi et al.
patent: 4661875 (1987-04-01), Kinjo
patent: 4739427 (1988-04-01), Kilmer et al.
patent: 4754351 (1988-06-01), Wright
patent: 4945432 (1990-07-01), Matsudaira et al.
IBM Technical Disclosure Bulletin, vol. 21, No. 2, Jul. 1978, Besha et al.

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