Daan,

In one of my former lives (Burroughs Corp./Unisys) I ran into a similar debacle.

I found a lab in San Mateo, Ca. USA that had a "laser microprobe" which had better Z-axis resolution than standard SEM techniques (Auger, etc.) The residue we were after had similar properties and we were able to get a solid identity of the compound with this instrument despite it's thin deposit.

Regards,

Ed Popielarski
QTA Machine
10 Mc Laren, Ste. D
Irvine, Ca. 92618

Ph: 949-581-6601
Fx: 949-581-2448
Cellular: 949-337-2578

http://www.qta.net

Check out our BGA Baller and Process Equipment Services!