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January 2009

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TechNet <[log in to unmask]>
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TechNet E-Mail Forum <[log in to unmask]>, David Tremmel <[log in to unmask]>
Date:
Wed, 14 Jan 2009 13:18:23 -0500
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TechNet E-Mail Forum <[log in to unmask]>, "Igoshev, Vladimir" <[log in to unmask]>
Subject:
Re: Discrimanting Imersion Sn from Immersion Ag on PCB's
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"Igoshev, Vladimir" <[log in to unmask]>
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A tiny "sliver" from a solder pad with EDS will give you the answer.

Vladimir

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of David Tremmel
Sent: Wednesday, January 14, 2009 1:15 PM
To: [log in to unmask]
Subject: Re: [TN] Discrimanting Imersion Sn from Immersion Ag on PCB's

Hello,
 
Crap a good board?
 
If I could, If I only could, I surely would (sung like Simon and
Garfunkel)
 
But then again I hate to think of what I would have to eat in order to
do that !!
 
Thank you, David Tremmel> Date: Wed, 14 Jan 2009 12:37:38 -0500> From:
[log in to unmask]> Subject: Re: [TN] Discrimanting Imersion Sn from
Immersion Ag on PCB's> To: [log in to unmask]> > 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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