21 Jun
2007
21 Jun
'07
2:10 p.m.
----- Original Message -----
From: "Grant Stockly" <grant at stockly.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Wednesday, January 03, 2007 1:20 AM
Subject: Re: Apple Disk ][ X-Ray
Grant wrote;
X-rays really won't help too much for soldering
BGA devices. With x-rays
you can't tell the difference between 2 pieces of .25" steel stacked on
each other or 1 piece of .5" steel when x-raying through the thickness.
I beg to differ. We ( Raytheon / Hughes ) exclusively use X-ray and Boundary
Scan to make certain BGAs are mounted / soldered correctly and electrically
connected. We would be blind and dead in the water without these.
Best regards, Steven