Ct. Wang et al., OPTIMIZATION OF ACTIVATION AND PROMOTION STEPS FOR DIRECT PLATING ON SUBSTRATES USED FOR SURFACE LAMINAR CIRCUIT, Journal of the Chinese Institute of Chemical Engineers, 28(6), 1997, pp. 463-467
The feasibility of applying direct plating to surface laminar circuit
(SLC) system via Pd/Sn catalyst and Na2S promotion has been explored,
The substrate to be tested was Probimer-52, It was found the platabili
ty is strongly influenced by a combination of the concentration of Pd
catalyst and sodium sulfide, An optimal concentration of Na2S was foun
d to be 0.5 g/l with an immersion time of 1.5 minutes, The plating rat
e was found to reach 1.76 mm/min.