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Date: | Tue, 24 May 2005 08:46:59 -0400 |
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Hi Werner,
I will look into that. Right now I have the last two zones off. Maybe I
should set both.
Good idea!
Thanks
Kerry
[log in to unmask]
05/24/2005 12:27 AM
To
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Subject
Re: [TN] BGA Intermittents
Hi Kerry,
How quickly do you cool from reflow?
It is possible that you cool too fast causing thermal shock [defined as
thermal gradients causing warpage of PCB and/or component] failures. This
has happened in the past.
Regards,
Werner Engelmaier
Engelmaier Associates, L.C.
Electronic Packaging, Interconnection and Reliability Consulting
7 Jasmine Run
Ormond Beach, FL 32174 USA
Phone: 386-437-8747, Fax: 386-437-8737, Cell: 386-316-5904
E-mail: [log in to unmask], Website: www.engelmaier.com
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