Steve,
First time I have ever heard someone asking for a TEM for a surface finish!
I know that at least in certain instances TEM can be used for determining crystal structure, but my return question is “what would be the point?”.
XRF, x-section, EDX and solderability testing should be sufficient.

IF you do want TEM done, approach the University of Toronto or CANMET in Hamilton.

Regards,
Bev

Sent from Mail for Windows 10

From: Steven Kelly
Sent: Wednesday, September 27, 2017 8:39 AM
To: [log in to unmask]
Subject: [TN] TEM Analysis

Hi all,
One of my customers has asked me to do a TEM analysis on immersion tin pads on a flex we make.

 1.  what will this tell me that XRF, x-section and EDX does not
 2.  If it does tell me something – suggestions of a source to get the work done.

Thanks. Steve Kelly