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. 22, 2019
Filed:
Jun. 15, 2015
Applicant:
Okuno Chemical Industries Co., Ltd., Osaka-shi, Osaka, JP;
Inventors:
Assignee:
OKUNO CHEMICAL INDUSTRIES CO., LTD., Osaka-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
C23C 22/52 (2006.01); C23C 22/58 (2006.01); C23C 22/68 (2006.01);
U.S. Cl.
CPC ...
C23C 22/58 (2013.01); C23C 22/52 (2013.01); C23C 22/68 (2013.01);
Abstract
An object is to provide a novel composition for blackening treatment that can sufficiently blacken copper circuits of printed wiring boards, circuits made of silver paste, and other various articles containing a copper-based metal, such as copper or a copper alloy, or a silver-based metal, such as silver or a silver alloy, without impairing the smoothness of the copper-based metal or silver-based metal. A composition is provided for blackening treatment of a copper-based metal or a silver-based metal, the composition comprising an aqueous solution containing: