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:
Apr. 25, 1989
Filed:
Dec. 03, 1987
Ruth C Laugal, Union Lake, MI (US);
Adolph L Micheli, Mt. Clemens, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A method is disclosed for forming an alumina film on a selected region of a surface without forming the film on an adjacent region. An ink film composed of aluminum caboxylate compound is applied to the surface and heated to partially decompose the compound. A positive photoresist layer is preferably applied to the partially decomposed layer and selectively irradiated to define a mask overlying the selected region. Unwanted photoresist material is dissolved from the adjacent region using an aqueous alkaline solution. It is found that the solution concurrently dissolves the underlying partially decomposed aluminum compound, without dissolving the compound protected by the mask. Thereafter, the mask is stripped, and the underlying aluminum compound is heated and further decomposed to produce the desired alumina film.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile