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. 04, 2003
Filed:
Apr. 12, 2000
John A. Adams, Escondido, CA (US);
Thomas F. A. Bibby, Jr., St. Albans, VT (US);
SpeedFam-IPEC Corporation, Chandler, AZ (US);
Abstract
A method and apparatus for determining the endpoint of a planarization process during chemical mechanical planarization (CMP) and more specifically for determining endpoint of a planarization process for a thin metal film deposited on a wafer's surface and/or a method of altering the plating and deplating of the thin metal film during the planarization process. The apparatus includes one or more probes embedded in a working surface. The probes are in electrical communication with the thin film on the wafer's surface as it is planarized against the working surface. The probes measure the thickness of the thin metal film and/or induce a current in the thin metal film to adjust the plating and deplating that occurs during the planarization process.