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:
Dec. 11, 1990
Filed:
Mar. 30, 1989
Anil K Nigam, Cupertino, CA (US);
Fujitsu America, Inc., San Jose, CA (US);
Abstract
A method for servo formatting disc media for a disc drive. The method includes (a) establishing a first timing decode pattern of transitions that precedes a first alignment pattern of transitions, that has a centerline substantially colinear with a centerline of the first alignment pattern and located at the boundary of one of a plurality of data tracks; (b) establishing a second timing decode pattern of transitions that precedes the data track and that has a centerline that is substantially colinear with the centerline of the data track; and (c) establishing a third timing decode pattern of transitions that precedes the second alignment pattern of transitions, and that has a centerline substantially colinear with the centerline of the second alignment pattern of transitions. The above method provides servo formatting for precisely detecting a read timing of the first and second alignment patterns.