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:
Sep. 14, 1999
Filed:
Mar. 24, 1997
Michael Barenboim, Boca Raton, FL (US);
Peter Michael Baumgart, San Jose, CA (US);
Pieter J Kerstens, Boca Raton, FL (US);
Huizong Lu, Coconut Creek, FL (US);
Iraj Kahkesh Pour, Milpits, CA (US);
Eric Von Schnetzer, Boynton Beach, FL (US);
Hong S Seing, Boca Raton, FL (US);
Andrew Ching Tam, Saratoga, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A disk texturing tool is used, for example, to provide textured spots in an annular portion of both sides of a hardfile disk. An optical system includes a laser directed at a beamsplitter to split the laser beam into two beams having approximately equal power, which are directed along parallel paths through a power control optics block to expose simultaneously opposite sides of a disk to be textured. A visible laser beam is also directed along this optical system to an inspection spot on each side of the disk, by which a central portion of each textured spots passes. A beam angle detector detects deflection of a reflection of the inspection beam from this spot in the direction of motion of the disk at this spot. This deflection provides a measure of the topography of the spot.