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:
Aug. 01, 2006
Filed:
Oct. 10, 2003
Kei Yasuna, Chiyoda, JP;
Naoki Satoh, Odawara, JP;
Makoto Horisaki, Odawara, JP;
Hitachi Global Storage Technologies Japan, Ltd., Odawara, JP;
Abstract
A magnetic disk apparatus and a servo pattern recording method therefor, enabling writing of servo signal with high quality, without being affected with ill influences due to fluctuation on a rotation speed when conducting the self servo write operation, comprises: a magnetic disk; a headhaving a write element for use of recording information onto the magnetic disk and a read element for reproducing information from the magnetic disk; and an actuator for moving said head to a desired radial position on the magnetic disk, wherein on the magnetic disk is recorded servo patternsfor positioning the head on a recording surface thereof, and within each of the servo patterns are recorded, a pattern sector markeras a marker for detecting passage time of the head, a track ID code, and a burst patternfor use of detection of the radial position of the head, following a preamblefor use of synchronization of time-base circuit, and further recorded and disposed a second preambleand a second sector markercontinuously.