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:
Aug. 09, 1977
Filed:
Nov. 10, 1976
Applicant:
Inventors:
Richard C Blish, II, San Jose, CA (US);
Kyle Eugene Lemons, San Jose, CA (US);
Assignee:
Signetics Corporation, Sunnyvale, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
156656 ; 65 31 ; 134-3 ; 156657 ; 156663 ; 252 793 ; 252 794 ;
Abstract
An aqueous solution for etching a glass layer on a metal (aluminum) substrate without substantial attack on the metal. The solution comprises buffered hydrofluoric acid, sodium chloride, and either (a) a fluorocarbon surfactant capable of forming a protective thin film upon the aluminum, or (b) a 6-hydroxy alcohol (e.g., mannitol or sorbitol).