The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 1992
Filed:
Mar. 29, 1989
Applicant:
Inventors:
Assignees:
Komag, Inc., Milpitas, CA (US);
Asahi Glass Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
427129 ; 427131 ; 4274301 ; 428 64 ; 428 65 ; 428141 ; 428426 ; 428694 ; 428900 ; 156663 ; 156646 ;
Abstract
A glass disk is subjected to a chemical or gentle mechanical polishing step to remove microcracks or scratches in the disk surface prior to chemically texturing the disk. Thereafter, magnetic media is deposited onto the glass disk. We have discovered that by performing this pre-texturing polishing step, we can avoid the phenomenon of 'linkage bumps,' which could otherwise cause the resulting magnetic disk to fail a glide-type test or to cause a read/write head crash.