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. 30, 1991
Filed:
Jul. 09, 1990
Applicant:
Inventors:
Koji Nishiyama, Saitama, JP;
Masayuki Yamazaki, Saitama, JP;
Takeshi Tsukuda, Saitama, JP;
Youtaro Arai, Saitama, JP;
Assignee:
Kojima Chemicals Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
106-123 ; 106-113 ; 252514 ; 427304 ;
Abstract
An electroless gold plating solution containing 0.1 to 10 ml/l of ethyleneamines and 0.1 to 10 g/l of hexamethylenetetramine as complexing agents in addition to the solution comprising water-soluble gold salts, pH controlling agents, catalysts, alkylamine boranes, alkali cyanides and ethylendiamine tetraacetic acid. According to the present invention, thick coating of a gold plating film having high quality and gloss is possible and the plating time becomes very short.