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:
Sep. 09, 2008
Filed:
Oct. 17, 2006
Bipinchandra V. Gami, Northridge, CA (US);
Yih Hurng Jung, Santa Clara, CA (US);
Hao Ping Wen, Sunnyvale, CA (US);
Kwong-tat Chan, Pleasanton, CA (US);
Bipinchandra V. Gami, Northridge, CA (US);
Yih Hurng Jung, Santa Clara, CA (US);
Hao Ping Wen, Sunnyvale, CA (US);
Kwong-Tat Chan, Pleasanton, CA (US);
Samsung Electronics Co., Ltd., Suwon, KR;
Abstract
A method for writing servo information onto a disk of a hard disk drive with a servo writer. The method includes accelerating a head to a constant velocity across a disk. The disk being defined as having an acceleration zone and a constant velocity zone. The head is then used to write a spiral servo pattern in the constant velocity zone. A final servo pattern is written in the constant velocity zone using the spiral servo pattern. A servo reference pattern is also written in the acceleration zone. The servo reference pattern is used to write a final servo pattern in the acceleration zone. The final servo pattern may be copied using a run-out cancellation algorithm to improve the accuracy of the servo pattern in the acceleration zone.