[mems-talk] pH of NiP plating bath

[Zhang Xiao Qiang]

Hi, 
 
I am trying to get NiP pattern with plating. Anyone have relevant experience? Some papers reported that the bath's pH value should be around 3-5. The as obtained bathes have pH near 0-1wether you use H3PO4 or NaH2PO3. The normal way to get this value is add NaOH but I found it is quite hard to handle it since NaOH reacts with Ni2SO4 and the product is not easy-solving in water?
 
Any comments and suggestions are apreciated.
 
Thanks!
 
Zhang