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:
Jan. 11, 2005
Filed:
Oct. 12, 2001
Shih-fu L. Lee, Fremont, CA (US);
David S. Kuo, Palo Alto, CA (US);
Shih-Fu L. Lee, Fremont, CA (US);
David S. Kuo, Palo Alto, CA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
The invention relates to a method for testing a magnetic disc having a plurality of tracks, and apparatus for such testing. The method includes scanning the magnetic disc along radial lines, storing a sequence of data points representing slopes of a plurality of tracks along the radial lines, operating on the stored set of points to determine a measured average slope for each track around an entire revolution of each track to establish a representative slope for each of the tracks of the plurality of tracks, taking a radial moving average to establish a sequence of data points, and comparing the curvature profile to a pre-established limit to determine suitability of the disc for use in a disc drive.