Cyanide-based gold plating baths continue to be used in manufacturing today despite toxicity considerations. One practical driver is, of course, the significance of product requalification upon switching out electrolyte. Sulfate-based gold baths are formulated to produce higher nominal plating rates than cyanide-based baths and so legacy applications using cyanide-based baths also face productivity concerns. This paper summarizes work performed at a major manufacturing site to drive plating rates of an established production process well beyond standard plating rates, enabling increased production capacity. The effort combined fundamental exploration of electrochemical behavior of the bath in non-standard conditions with targeted empirical studies to identify straightforward reactor configuration changes that would enable a much faster process.
Mr. Carter is a product and process development engineer of electrochemical systems including semiconductor plating and advanced battery manufacturing. He is co-inventor on multiple patents enabling electrochemical systems. At ClassOne, Mr. Carter is responsible for driving process hardware development for the advancement of plating and surface preparation applications. He is a graduate of the Katholieke Universiteit Leuven.