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. 10, 2015
Filed:
Jun. 25, 2013
Applicant:
Western Digital Technologies, Inc., Irvine, CA (US);
Inventors:
Phillip S. Haralson, Laguna Niguel, CA (US);
Galvin T. Chia, Rancho Santa Margarita, CA (US);
Assignee:
Western Digital Technologies, Inc., Irvine, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/60 (2006.01);
U.S. Cl.
CPC ...
G11B 5/6011 (2013.01);
Abstract
A disk drive is disclosed comprising a head actuated over a disk, the head comprising a fly height actuator (FHA). A fly height of the head is measured, and a closed-loop fly height control signal is generated based on the measured fly height and a target fly height. The target fly height is adjusted based on a delta generated based on a change in an environmental condition, and an FHA control signal is applied to the FHA based on the closed-loop fly height control signal.