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:
Nov. 10, 1998
Filed:
Jun. 04, 1997
Applicant:
Inventor:
Bruce M Harper, San Jose, CA (US);
Assignee:
HMT Technology Corporation, Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
21912168 ; 21912182 ;
Abstract
An apparatus for laser texturing the inner annular region of a substrate is described. The apparatus includes a Bernoulli holder for supporting the disc at a fixed distance from a support face in the holder, and a laser beam for directing a pulsed laser beam on the substrate's inner annular region. Also included is an optical assembly for varying the position of such a spot on such inner annular surface region of the substrate.