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:
Sep. 13, 2005
Filed:
Jun. 27, 2003
Jack M. Chue, Los Altos, CA (US);
William C. Tipton, Ii, Gilroy, CA (US);
David P. Turner, Los Gatos, CA (US);
Jack M. Chue, Los Altos, CA (US);
William C. Tipton, II, Gilroy, CA (US);
David P. Turner, Los Gatos, CA (US);
Western Digital Technologies, Inc., Lake Forest, CA (US);
Abstract
A method of selecting a track density for a disk surface of a disk drive is disclosed. A first pattern is written along a circumferential path of the disk surface, wherein the first circumferential path comprise a first set of arcuate sections interleaved with a second set of arcuate sections. A second pattern is written radially offset from the circumferential path during time intervals corresponding to the first set of arcuate sections. The head is positioned substantially over the center of the first circumferential path and during time intervals corresponding to the second set of arcuate sections, the first pattern is read to generate a first read signal amplitude measurement A, and during time intervals corresponding to the first set of arcuate sections, the first pattern is read to generate a second read signal amplitude measurement A. A track density is selected in response to Aand A, wherein the track density is for use in writing embedded servo sectors to the disk surface.