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:
Jul. 08, 2014
Filed:
Jun. 10, 2011
Kent D. Anderson, Broomfield, CO (US);
Shafa Dahandeh, Laguna Niguel, CA (US);
Galvin T. Chia, Rancho Santa Margarita, CA (US);
Alvin W. Tan, Irvine, CA (US);
Noureddine Kermiche, Mission Viejo, CA (US);
Ming Jin, Fremont, CA (US);
Kent D. Anderson, Broomfield, CO (US);
Shafa Dahandeh, Laguna Niguel, CA (US);
Galvin T. Chia, Rancho Santa Margarita, CA (US);
Alvin W. Tan, Irvine, CA (US);
Noureddine Kermiche, Mission Viejo, CA (US);
Ming Jin, Fremont, CA (US);
Western Digital Technologies, Inc., Irvine, CA (US);
Abstract
A disk drive is disclosed comprising a head actuated over a disk and a fly height actuator operable to control a fly height of the head in response to a fly height control signal. A touchdown operation is executed to set an operating fly height control signal by adjusting the fly height control signal until the head contacts the disk. A fly height calibration track is then read to set a fly height reference. When calibrating the operating fly height control signal, the fly height calibration track is read and the operating fly height control signal is adjusted in response to the fly height reference. When the adjusted operating fly height control signal is invalid, the touchdown operation is re-executed to reset the operating fly height control signal and then the fly height calibration track is read to reset the fly height reference.