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July 2001

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Subject:
From:
"Creswick, Steven" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 12 Jul 2001 10:57:50 -0400
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Louis,

For what is it worth, I agree with Craig.

Why risk it, unless it is a very low cost, low rel product?

Steven Creswick - Gentex Corp

-----Original Message-----
From: Louis, Edwin @ CSE [mailto:[log in to unmask]]
Sent: Thursday, July 12, 2001 9:30 AM
To: [log in to unmask]
Subject: [TN] PEMs


If one receives PEMs from the manufacturer which are supposedly dry and
handled correctly but are found to have internal delamination
by acoustic spectroscopy, whether this is an automatic sentence of
popcorning when the devices are put through convection reflow. Is there air
inside the part that can cause popcorning of a dry part when no outward
signs of delamination or popcorning is visible.Also,

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