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:
Feb. 18, 2003
Filed:
May. 15, 2001
John C. Tsai, Saratoga, CA (US);
Excel Precision Corporation, Santa Clara, CA (US);
Abstract
Apparatus ( ) and method ( ) for inscribing a clock pattern ( ), detecting the clock pattern ( ) optically, and using the clock pattern ( ) to write a sevo pattern in an information storage unit ( ), such as a computer hard drive. The clock pattern ( ) is inscribed using a marking system ( ), which may include a laser ( ) or employ other, even non-optical, methods. The clock pattern ( ) is inscribable into various locations on a disk platter ( ) inside the storage unit ( ), including many outside the media surface ( ) conventionally used for such in data storage units. While the disk platter ( ).is rotating, the clock pattern ( ) is on detected using an detection subsystem ( ), if desired through a transparent window ( ) in a hermetically sealed housing ( ) of the storage unit ( ), for use in writing the servo pattern with less sector-inconsistency error and off-track error.