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:
Jul. 20, 1976
Filed:
Aug. 14, 1975
Applicant:
Inventor:
Michael Hill, Tarrytown, NY (US);
Assignee:
General Instrument Corporation, Clifton, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
228220 ; 228223 ; 148 23 ; 228263 ;
Abstract
A process for removing lead oxide from the surface of the lead solder of a semiconductor assembly in the inert atmosphere of a joining furnace by introducing into the joining furnace an acetate compound capable of reacting with lead oxide at the joining furnace temperature to form a coordinated lead compound. Both the acetate compound and the coordinated lead compound are gases at the joining furnace temperature. The acetate compound is preferably glacial acetic acid, acetic anhydride, or mixtures thereof.
Hill, Michael. (1976). Fluxing technique for removing lead oxide (U.S. Patent No. 3970239). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3970239
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile