Hi All

   This is greeting from Wisdom Lu, a new member joined in this platform
for electronic industry. 

   I am working in Benchmark technology (Suzhou) company and work at EMS
industry about five years, I'm very appreciate you can share your
valuable ideas or suggestive opinion with me, thanks firstly,

Now I have a question need your help.

 1. Who has IPC-4552 and IPC-4553 criteria? Would you please send me the
softcopy?
 2. Did you know the advantage and inferior between Ni/Au and immersion
silver    
    for PCB surface treatment at PCBA assembly?

Expect your reply, 

Thanks!

Wisdom