Not necessarily...only if the solder wets to the entire pad, which may not
be so if using lead free...

Kevin

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ian Hanna
Sent: Friday, October 20, 2006 8:46 AM
To: [log in to unmask]
Subject: Re: [TN] Gold immersion vs. silver immersion

Assuming you're not assembling at sea -- the finish will have disappeared
into your solder joint long before your ship sails.
Question is do you prefer a copper/solder or a nickel/solder bond.  Ian

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Charlie McMahon
Sent: Friday, October 20, 2006 7:28 AM
To: [log in to unmask]
Subject: Re: [TN] Gold immersion vs. silver immersion

Good Morning All:



Might I ask for some guidance from you all..



In determining a surface coating a conflict has arisen between choosing Gold
immersion vs. Silver immersion as the

choice. The application is for boards that are used in shipboard electronics
(non military) but they are protected from the external environment.



My question is which is the more appropriate coating?

Technically, the gold has always worked from the PCB fab and assembly end
with success with a controlled cost of ownership.

The silver however is one that causes concern.



Any suggestions would be appreciated.



Best Regards,



Charlie McMahon

McMahon Sales Company










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