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. 02, 2003
Filed:
Dec. 27, 2001
Robert G. Boehm, Dresden, DE;
John M. Boyd, Atascadero, CA (US);
Lam Research Corporation, Fremont, CA (US);
Abstract
A polishing tool includes a polish pad, a bladder, a fluid, and a flux guide. A bladder containing fluid supports the polishing pad that is positioned adjacent to a surface to be polished. Flux guides positioned along a portion of the bladder direct a field or a magnetic flux to selected locations of the bladder. The method of polishing a surface adjusts the field or the magnetic flux emanating from the flux guides which changes the mechanical properties of the fluid. By adjusting the magnitude of the field or level of magnetic flux flowing from the flux guides independent pressure adjustments occur at selected locations of the bladder that control the polishing profile of the surface.