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:
Jun. 27, 2000
Filed:
Jun. 29, 1998
Paul M Green, Morgan Hill, CA (US);
Wai C Leung, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The hard disk drive manufacturing method of the present invention includes an initial determination of the orientation of the individual hard disks during the various processing steps and disk drive assembly steps. Specifically, the orientation of the hard disks in the assembled disk drive is ascertained, such that the direction of arcuate writing paths on the disk surface is known. Additionally, the orientation of non-random arcuate micro-scratches that appear on the disk surface during disk processing is ascertained. Where the arcuate path of the micro-scratches corresponds to the arcuate writing paths on a disk surface, the disk process is altered to effectively reorient the disk in its mounting in the hard disk drive. The result of the process alteration is that there is no longer a correspondence between the arcuate path of the micro-scratches and the arcuate written data paths, and a significant reduction in the number of defects on the surface of the hard disk is obtained.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile