Chris,

If you know a company willing to pay the cost of FIB for that kind of task, please let me know. I wouldn't mind get them as a customer :-)
Vladimir

SENTEC Testing Laboratory Inc.
11 Canadian Road, Unit 7.
Scarborough, ON M1R 5G1
Tel: (416) 899-1882
Fax: (905) 882-8812
www.sentec.ca

-----Original Message-----
From: Chris Mahanna <[log in to unmask]>
Sender: TechNet <[log in to unmask]>
Date:         Fri, 17 Sep 2010 12:31:34 
To: <[log in to unmask]>
Reply-To: TechNet E-Mail Forum <[log in to unmask]>,
        Chris Mahanna <[log in to unmask]>
Subject: Re: [TN] How to measure thickness of ENIG plating inside the via barrel

If you want to know the truth, FIB mill it and SEM, with or without microsection.  If you're going to microsection, you better use some excellent mounting material (slow cure epoxy).
Otherwise find some way to XRF, take the numbers and don't ask questions.
It is no mistake that the vast majority of 6012 immersion finish conformance is based strictly on "coverage and solderable".

As for structural integrity from Ni, definitely true.  Thickness is easily measured in microsection.

Chris

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