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. 07, 2017
Filed:
Apr. 11, 2016
Applicant:
Seagate Technology Llc, Cupertino, CA (US);
Inventors:
Alfredo Sam Chu, Prior Lake, MN (US);
Drew Michael Mader, Minneapolis, MN (US);
Wenzhong Zhu, Apple Valley, MN (US);
Michael A. Cordle, Eagan, MN (US);
Assignee:
SEAGATE TECHNOLOGY LLC, Cupertino, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/12 (2012.01); G11B 7/1267 (2012.01); G11B 20/18 (2006.01); G11B 5/02 (2006.01); G11B 13/08 (2006.01); G11B 5/00 (2006.01); G11B 20/10 (2006.01); G11B 5/012 (2006.01);
U.S. Cl.
CPC ...
G11B 7/1267 (2013.01); G11B 5/02 (2013.01); G11B 13/08 (2013.01); G11B 20/10481 (2013.01); G11B 20/182 (2013.01); G11B 5/012 (2013.01); G11B 20/10509 (2013.01); G11B 2005/0021 (2013.01);
Abstract
During field operation of a heat-assisted magnetic recording data storage device, a laser adjustment procedure is performed. The laser adjustment procedure involves writing on a recording medium at least three tracks. If a bit error rate of a middle tracks has increased, the laser current is swept while recording test tracks to determine a new laser current that results in a minimum bit error rate. The new laser current is used for subsequent write operations.