C-SAM is FA tool, not screening tool. Parts got wet and defined delam or not during the test. You can not re-use the part. Although it is called non-destructive, but definitely, not a screening tool on my book. If you are looking for wire open or short (assume you have done X-ray, found nothing), dry "squid" may be better. Again. Not screening tool, but a FA tool. If they don't like ultrasound, and have deep pocket $. -------------------------- Sent using BlackBerry ----- Original Message ----- From: Steven Creswick [mailto:[log in to unmask]] Sent: Monday, December 31, 2012 02:21 PM To: [log in to unmask] <[log in to unmask]> Subject: Re: [TN] Susceptibility of electronics to C-SAM Richard, If there is no cavity around the wires, there should be no issue - period! I suggest that they are drawing inappropriate conclusions. I absolutely agree that ultrasonic cleaning of sealed, cavity style components can be catastrophic, but you appear to be speaking of a PEMs device. Now then, if there were an air gap in your package, the u/s signal would be blocked, and you would see nothing on your acoustic image... unless, you could turn it over and scan from the other side. Therefore, I doubt that you have a cavity style device - but you could surprise us :-) I had an acoustic microscope from 'the other guys', and would use transducers of quite tightly fixed frequency, depending on what was being scanned. Higher frequency for thin parts, greater resolution. Lower freq for penetration, but not necessary fantastic resolution. I forget what my low freq transducer was 30, or 80 MHz .... The highs were in the hundreds of MHz. A quickie call to Sonoscan could tell you what frequency they would use for your device and one could calculate the wavelength and make a reasonable guess if this would set up harmonics in the wires. My guess is the freqs are way too high, but one could check. Maybe you will convince them easily and the New Year will start out well! Best regards, Steve Creswick Sr Associate - Balanced Enterprise Solutions http://www.linkedin.com/in/stevencreswick 616 834 1883 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D. Sent: Monday, December 31, 2012 1:48 PM To: [log in to unmask] Subject: [TN] Susceptibility of electronics to C-SAM I have a good understanding of the effects of damage that can be caused by cavitation when cleaning electronics using ultrasonic wash with the wrong sweep frequency, but does anyone know if ultrasonic energy from C-SAM analysis can cause damage to electronics? I recently had a customer object when I suggested using Sonoscan to inspect some components for die bond issues, and he said that he had heard ultrasonics could damage electronics. I explained to him that while that was possibly true of ultrasonic cleaning (if not done properly), I had never heard of C-SAM harming electronics. 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