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Subject:	Re: Immersion Silver and Desiccants
From:	"David D. Hillman" <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:	Wed, 5 Mar 2008 12:57:20 -0600
Content-Type:	text/plain
Parts/Attachments:	text/plain (74 lines)

Hi Jack! Let me put a different spin on what your associate read - You 
should NEVER put anything in the bag containing a pwb with a ImAg surface 
finish unless you know that the "anything" will not outgas/contaminate the 
surface finish. We always specify silver saver paper which does a good job 
of keeping outgassing/stuff away from the pwb. Some humidity indicators 
and desiccant materials are safe to put in the bag - you just need to do 
the homework. If you really want to see a reaction, put a rubberband in 
the pwb bag - wonderful surface species evolve (sulfur creatures)!   Good 
Luck.

Dave Hillman
Rockwell Collins
[log in to unmask]




Jack Olson <[log in to unmask]> 
Sent by: TechNet <[log in to unmask]>
03/05/2008 10:53 AM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
Jack Olson <[log in to unmask]>


To
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Subject
[TN] Immersion Silver and Desiccants






One of my associates read somewhere (on a datasheet) that
desiccants should NOT be packaged with immersion silver boards,
(and seems to be putting a huge significance on that discovery)

My response would be:
OK. take out the desiccants and put in humidity indicators.
case closed.

Is there something else I should know about this?

Jack (aka "the new guy")

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