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January 2009

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Subject:
Re: Discrimanting Imersion Sn from Immersion Ag on PCB's
From:
Bev Christian <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Bev Christian <[log in to unmask]>
Date:
Wed, 14 Jan 2009 12:37:38 -0500
Content-Type:
text/plain
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text/plain (107 lines) 
As long as you don't use it on an active pad - don't want to crap a good
board!

Bev
RIM

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Gabriela
Sent: Wednesday, January 14, 2009 1:37 PM
To: [log in to unmask]
Subject: Re: [TN] Discrimanting Imersion Sn from Immersion Ag on PCB's

Maybe you can try:
http://www.koslow.com/metaltestchart.html
I don't know how sensitive these are for thin coatings...
Gaby
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez
Sent: Wednesday, January 14, 2009 2:55 PM
To: [log in to unmask]
Subject: Re: [TN] Discrimanting Imersion Sn from Immersion Ag on PCB's

How about XRF?

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Larry Dzaugis
Sent: Tuesday, January 13, 2009 5:09 PM
To: [log in to unmask]
Subject: [TN] Discrimanting Imersion Sn from Immersion Ag on PCB's

We have several PCB's produced with Immersion Ag and Immersion Sn
finish.
Is there quick test to check the finish on the PCB to determine which
finish
it is?

The Sn appears greyer than the Ag but the sample size is small.

The drawings do call out the finish, looking for a way to verify which
was
shipped.

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