Advanced mechanical texture process for high density magnetic re

Details Advanced mechanical texture process for high density magnetic re Advanced mechanical texture process for high density magnetic re

1998-09-18

2000-10-10

Scherbel, David A.

Abrading

Abrading process

With critical temperature modification or control of work or...

451168, 451173, 451 63, 451302, 451296, 451307, B24B 100

Patent

active

061296120

ABSTRACT:
Method for removing random scratches formed during the polishing of magnetic recording media, and for disposing on the surface of the media a near-circumferential texture which increases the recording reliability of the media while simultaneously reducing its failure rate. The present invention teaches the application of a low unit load force to a large surface pad and polishing tape combination while in contact with a rotating disk surface that is also moving in a circumferential direction to completely remove the random scratches previously formed by a polishing step. The scratches are removed with the aid of a specially designed, extremely fine alumina slurry composition which prevent producing similar size circumferential scratches at the high surface speeds. The methodology provides for a smoother disk surface than prior known super-polish/texture methodologies. The methodology taught by the principles of the present invention is inherently more uniform than known batch process for polishing and texturing disks and leads to increased efficiency of media manufacturing through reduced manufacturing and post-deployment failures.

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patent: 5012618 (1991-05-01), Price et al.
patent: 5628676 (1997-05-01), Hoshizaki
patent: 5885143 (1999-03-01), Ichikawa et al.
patent: 5913712 (1999-06-01), Molinar
"EDC 1800A Automated Surface Finisher", Nov. 11, 1994, Exclusive Design Company, Inc., EDC 1800A ASF Manual, Part No. 15633, pp. 1-1 through 1-9.

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