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. 29, 2005
Filed:
Jul. 23, 2003
Applicants:
Kenichiro Sugiyama, Abiko, JP;
Kei Yasuna, Chiyoda, JP;
Takashi Yamaguchi, Tsuchiura, JP;
Inventors:
Assignee:
Hitachi Global Storage Technologies Japan, Ltd., Odawara, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B005/596 ;
U.S. Cl.
CPC ...
Abstract
A servo write method capable of generating and recording correction data, to be used for compensating for repeatable position error caused by write errors of servo patterns, in a short time is presented. In the recording of the servo pattern, correction data for correcting revolution-synchronous components are generated from a position error signal which is obtained from the difference between a target position and a magnetic head position, and the correction data are recorded in servo areas on a disk.