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:
Nov. 16, 1999
Filed:
Aug. 12, 1997
Applicant:
Inventors:
Assignee:
Trace Storage Tech. Corp., Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ; G01B / ; G06F / ;
U.S. Cl.
CPC ...
702 34 ; 702 33 ; 360130 ;
Abstract
A method for predicting total bump height reduction from volume wear rate data for a laser textured magnetic disk. In this method, a bump topography function, r(h), is first established by which the bump half-width, r, is expressed as a function of bump depth, h. Then the bump height depth after first revolution, h.sub.1, is calculated according to the following equation: ##EQU1## Based on the observation of constant wear volume per cycle, the bump height depth after each subsequent revolution, h.sub.i, i=2 . . . N, is calculated according to the following equation: ##EQU2## The so-calculated h.sub.N is the total bump height reduction after the Nth revolution.