I used these kits in the past for mechanical parts where the plating was
considerably thicker than on PCB's.
They were reliable.
I think that the company could answer your question.
Regarding scrappig I think that as long as there are big enough pads or bare
metal areas for the test there is no problem for one circuit to be repaired
by solder coating.
The problem is that you have to test on a closed circuit, so that it may not
be applicable for any layout.
Gaby
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Willis
Sent: Wednesday, January 14, 2009 10:11 PM
To: [log in to unmask]
Subject: Re: [TN] Discrimanting Imersion Sn from Immersion Ag on PCB's
Are these kits as good as the lead test kits?
Bob Willis
2 Fourth Ave, Chelmsford, Essex, CM1 4HA England
Tel: (44) 1245 351502
Fax: (44) 1245 496123
Mobile: 07860 775858
www.ASKbobwillis.com
New Bob Willis "Printed Board Inspection & Quality Control Workshop" 24th
March www.ASKbobwillis.com/faworkshops.pdf
"Troubleshooting Your Assembly Yields Workshop" 25th March
www.ASKbobwillis.com/faworkshops.pdf
Book Bob's "Step by Step Failure Analysis Workshop" 22nd April
www.ASKbobwillis.com/faworkshops.pdf
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Gabriela
Sent: 14 January 2009 18:37
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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