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:
Mar. 25, 2014
Filed:
May. 17, 2012
Jason Adler, Fremont, CA (US);
David Rutherford, San Jose, CA (US);
Man Cheung, Campbell, CA (US);
Perry Neos, Los Altos, CA (US);
Luan Ton-that, San Jose, CA (US);
Jason Adler, Fremont, CA (US);
David Rutherford, San Jose, CA (US);
Man Cheung, Campbell, CA (US);
Perry Neos, Los Altos, CA (US);
Luan Ton-That, San Jose, CA (US);
Marvell International Ltd., Hamilton, BM;
Abstract
Methods, systems, and apparatus, including computer program products, are described for calibrating servos, and in some implementations for calibrating spiral servos for use in self servo write processes. In one aspect, a method is provided that includes measuring a slope of a spiral written to a machine readable medium, and adjusting a parameter in accordance with the measured slope to calibrate spacing of servo tracks, with respect to variation between a target slope and the measured slope for the spiral, for writing the servo tracks to the machine readable medium using the spiral as a reference and the adjusted parameter to generate a same radial spacing between servo tracks from spirals with different slopes.