X-ray and X-sectionning are complimentary. But if X-section is done only based on the X-ray data, then a lot of defects can be missed.
Regards,

Vladimir

SENTEC Testing Laboratory Inc.
11 Canadian Road, Unit 7.
Scarborough, ON M1R 5G1
Tel: (647) 495-8727
Cell: (416) 899-1882
www.sentec.ca

-----Original Message-----
From: Larry Dzaugis <[log in to unmask]>
Sender: TechNet <[log in to unmask]>
Date: Mon, 18 Mar 2013 11:22:53 
To: <[log in to unmask]>
Reply-To: TechNet E-Mail Forum <[log in to unmask]>,
        Larry Dzaugis
	<[log in to unmask]>
Subject: Re: [TN] x-ray inspection of PTH barrel fill

X-ray is much quicker than cross section to qualify a process.
Suggest enough cross sections to verify what is being measured by x-ray.

As an EMS, one customer had a requirement for 100% x-ray inspection under a
critical component. EMS purchased 5 in line 5DX machines for this 13 years
ago. This was a life critical a sensor.

Again, can you live with the with a 25% hole fill undetected in the
product?  If the process drifts, how big a deal is it to get back on track,
what happens to the previously run product. Many signal pins won't care,
many environments won't care, what about your pins and your environments
and your price of failure? A colleague had to testify at court when an air
bag did not deploy. Not a 1 time occurrence.

The IPC 610 provides a starting point. Part of the job is determining if it
is sufficient for the work at hand.


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