Patent ID: 9650719
Date: 2017-05-16
CPC Classifications: C23C,H05K

Claim:
1. A method for electroless plating of palladium onto a copper surface of a component, comprising: preparing a bath having a palladium compound; a poly aminocarboxylic compound; hypophosphite or a derivative thereof a pH adjuster; a complexing agent; a reaction stabilizing mixture of phosphite at a concentration between 0.1 grams per liter (g/l) and 5 g/l, nitrite at a concentration between 0.1 g/l and 5 g/l, copper at a concentration between 0.1 milligrams per liter (mg/l) and 10 mg/l, bismuth at a concentration between 0.1 mg/l and 10 mg/l, and lead at a concentration between 0.1 mg/l and 5 mg/l; and submerging the component in the bath to plate palladium directly on the copper surface of the component.