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:
May. 23, 2017
Filed:
Mar. 13, 2007
Applicant:
Kowang Liu, Fremont, CA (US);
Inventor:
Kowang Liu, Fremont, CA (US);
Assignee:
Headway Technologies, Inc., Milpitas, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/40 (2006.01); G11B 5/455 (2006.01); G11B 5/60 (2006.01); G11B 5/31 (2006.01); G11B 5/127 (2006.01);
U.S. Cl.
CPC ...
G11B 5/3133 (2013.01); G11B 5/1278 (2013.01); G11B 5/607 (2013.01); G11B 5/6064 (2013.01); G11B 5/6076 (2013.01); Y10T 428/11 (2015.01);
Abstract
Dynamic fly height (DFH) control is obtained for a read/write head by use of a heating element having two laterally separated heat sources symmetrically spaced around the track center line of the head. The two heating sources create a protrusion profile relative to the undistorted ABS that recesses the read element and main write pole at the track center line relative to off-track positions. The resulting DFH control also protects the head from HDI (head-disk interference) events that are either the result of calibration procedures or normal HDD (hard disk drive) operation.