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:
Jul. 25, 2006
Filed:
Sep. 20, 2001
Hiroshi Ashikaga, Kawasaki, JP;
Nobuyuki Suzuki, Kawasaki, JP;
Hiroshi Ashikaga, Kawasaki, JP;
Nobuyuki Suzuki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
In a servo pattern deviation correcting method and disk apparatus of the present invention, a read/write head writes information to a disk and reads information from the disk. Servo pattern blocks are written to respective sectors of the disk along a target track. A deviation of each servo pattern block from a position of the track in a transverse direction is detected. A deviation correction pattern for each servo pattern block is created based on the deviation of the servo pattern block. The deviation correction pattern is written to a predetermined region of the disk between each servo pattern block and a data region along the track. The deviation correction pattern is read from the predetermined region of the disk, so that the read/write head is shifted to a deviation-corrected position on the track based on the servo pattern block and the deviation correction pattern.