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:
Mar. 31, 1998
Filed:
Aug. 27, 1996
Ronald L Williams, Fallbrook, CA (US);
James C Thomas, Santa Barbara, CA (US);
Hughes Electronics, Los Angeles, CA (US);
Abstract
An electrically conductive substrate (20) is etched by providing an etchant solution having finely divided, electrically conductive particles (40) mixed therein. The electrically conductive particles (40) are made of a material that is cathodic to the substrate (20) and does not dissolve into the etchant solution, with a preferred such material being graphite. The substrate (20) is placed into the etchant solution having the particles (40) therein so that the particles (40) contact the substrate (20), and etched for a period of time sufficient to remove a desired amount of the substrate material. The substrate (20) may be provided with an apertured mask (24) prior to being placed into the etchant solution.