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:
Jan. 24, 1978
Filed:
Nov. 13, 1975
Applicant:
Inventors:
Karl Heinz Neisius, Darmstadt, DT;
Wilhelm Baumer, Darmstadt, DT;
Assignee:
Merck Patent Gesellschaft mit beschrankter Haftung, Darmstadt, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B08B / ;
U.S. Cl.
CPC ...
134-3 ; 134 38 ; 252143 ; 252D / ; 252364 ;
Abstract
Hardened photolacquer on semi-conductors and integrated circuits for etching purposes are stripped therefrom employing, preferably at a temperature above 75.degree. C., a stripping composition consisting essentially of 20-50 weight percent of at least one alkylbenzenesulfonic acid of 12-20 carbon, and 80-50 weight percent of a chlorine-free, aromatic hydrocarbon having a boiling point above 150.degree. C.