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:
Aug. 04, 2015
Filed:
Oct. 11, 2013
Applicant:
Western Digital Technologies, Inc., Irvine, CA (US);
Inventors:
Galvin T. Chia, Rancho Santa Margarita, CA (US);
Prakash Balasubramaniam, Rancho Santa Margarita, CA (US);
Assignee:
Western Digital Technologies, Inc., Irvine, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 11/00 (2006.01); G11B 13/04 (2006.01); G11B 11/105 (2006.01); G11B 7/126 (2012.01); G11B 5/00 (2006.01);
U.S. Cl.
CPC ...
G11B 13/04 (2013.01); G11B 11/10595 (2013.01); G11B 7/126 (2013.01); G11B 11/1053 (2013.01); G11B 2005/0021 (2013.01);
Abstract
A disk drive is disclosed comprising a disk and a head comprising a laser configured to heat the disk while writing to the disk. Data is written to the disk using an operating laser power applied to the laser, and then the data is read from the disk to generate a read signal. A ramp interval is measured for an amplitude of the first read signal to ramp up to a first threshold.