I will be watching this one. A couple of years ago we had a job for several
thousand little boards about 1.24" sq. The panels were supplied by the
customer and many of the panels had 50% or more bad boards. I asked the
customer why he was using a supplier with half bad product. The answer was
"they are the cheapest we could find". Duh. Of course to actually assemble
them cost more. But so what he gets bare boards cheap.

-----Original Message-----
From: Mark Larson [mailto:[log in to unmask]]
Sent: Friday, March 12, 2004 9:13 AM
To: [log in to unmask]
Subject: [TN] Board panelization - bad boards


Hi,

When boards are delivered as a panel for assembly it is not necessary
for all boards on the panel to be good, you don't want to scrap a panel
because of a small number of bad boards on the panel. My guess is that
if the panel contains 80% good boards you don't want to throw away the
entire panel, yet if there is only 20% good, it may not be cost
effective to send it through assembly (and you've probably lost faith in
that fabricator's boards). So is there a point where the number of bad
boards on the panel makes the entire panel scrap? How do you determine
that?

Mark Larson
Sr. PCB Designer
Analog Technologies Corporation
11441 Rupp Drive
Burnsville, MN 55337
952-894-9228 voice
952-894-2966 fax
[log in to unmask]

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