Phil et al,

The CR units have no trouble with these parts at around 100kv. I used boards
with the parts on them when looking for x-ray units recently. Hope to have
my CR unit next week.

Rick

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Phil Zarrow
Sent: Friday, April 28, 2000 2:14 PM
To: [log in to unmask]
Subject: Re: [TN] I can't X-ray through this BGA!!!


Steve-
This might be a case of "you gets what you pays for" and might be one of the
differences between the low-cost x-ray systems, and the more powerful,
higher
resolution systems, like CR and others.  You might try examining the part
with a CR and see what results.  We'll stay tuned!
I also think one needs the a resolution of at least 10 microns in order to
determine if voids are in the 20-25% range and I don't think you get that on
a benchtopper.
Regards,
Phil Zarrow
ITM, Inc.
Durham, NH

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