Patent ID: 9719183
Date: 2017-08-01
CPC Classifications: C23C,C25D

Claim:
1. An electroless gold plating liquid, comprising: (a) an isolated complex of monovalent gold ions obtained by (b) aminomercaptothiadiazole; and (c) a reducing agent, wherein: the main complexing agent is at least one compound selected from the group consisting of 2-mercaptoacetamide, 2,2′-bis-acetamide disulfide, 2-thiophenecarboxamide, rhodanine, 2,4-thiazolidinedione, 2-thiophenecarboxilic hydrazide, rhodanine-3-acetic acid, 1,4-benzothiazin-3-one, 3,5-dimethyl-1-(2-thienylcarbonyl)-1H-1,2,4-triazole, N-phenyl-2-(phenylthio)acetamide, N-phenyl-1-benzothiophene-2-carboxamide, 6-aminopencillanic acid, and tiopronin; and the electroless gold plating liquid has a pH of 3.5 or higher.