| 摘要 |
PURPOSE:To obtain the title stable electroless gold plating soln. having low toxicity and capable of carrying out thick plating for a long time by incorporating the chloride or sulfide of lead as a stabilizer into the plating soln. contg. a gold (I) thiosulfate complex as a gold source. CONSTITUTION:The chloride or sulfide of lead and the stabilizer for inhibiting the autolysis of the plating soln. are incorporated into the plating soln. contg. a gold (I) thiosulfate complex as a gold source and contg. a reducing agent, a complexing agent, an antioxidant for the complex agent, a pH regulator, etc. Since the obtained electroless gold plating soln. does not contain a toxic cyanide ion, safety of the plating operation and simplification of the waste liq. treatment can be obtained. In addition, the soln. can be used for a long time due to the stabilizer. |
