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Date: Wed, 18 Dec 1996 07:17:09 -0800
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From: [log in to unmask] (Kenny Bloomquist)
Subject: Dross on CCA
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We have a couple of boards that came out of the wave solder machine 
with the
solder joints looking like dross, i.e. gold, purple, etc.  The solder 
joints
look good and this discoloration is only on the bottom of the CCA.  
CCA's
flowed prior to and after these looked ok.

My question is, does this present a real problem or is it a process
indicator?  This is for a high reliability DOD program.

Thanks in advance for all responses.

Ken Bloomquist
Olin Aerospace Company
[log in to unmask]

Ken,

Sounds to me this is a "unique to one assembly" situation as opposed to 
"it happens on everythinbg we build here". What are your process 
parameters? i.e., board architecture, flux used, top side temp, solder 
temp, etc.?

Ed Popielarski
QTA.Machine
(714) 364-6614
[log in to unmask]

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