Patent ID: 6811674
Filing Date: 2004-11-02
Classification: C25D,H01L

Abstract:
A palladium plating solution comprising 1 to 60 g/L, in terms of the amount of palladium, of a soluble palladium salt and 0.1 to 300 g/L of a sulfamic acid or its salt, said palladium plating solution being substantially free from a brightening agent, and wherein the soluble palladium salt is selected from the group consisting of dichlorotetraamminepalladium (Pd(NH3)4Cl2), tetraamminepalladium diiodide (Pd(NH3)4I2), tetraamminepalladium dinitrite (Pd(NH3)4(ONO)2), tetraamminepalladium dinitrate (Pd(NH3)4(NO3)2), tetraamminepalladium disulfite (Pd(NH3)4(SO3)2), tetraamminepalladium disulfate (Pd(NH3)4(SO4)2), and dinitrotetraamminepalladium (Pd(NH3)4(NO2)2).