Thank you Werner.

-----Original Message-----
From: Werner Engelmaier [mailto:[log in to unmask]]
Sent: Tuesday, September 24, 2002 12:04 PM
To: [log in to unmask]
Subject: Re: [TN] CGAs


Hi Edwin,
>Can anyone please give me their experiences with Column Grid Arrays? How do
>you use them, do they survive thermal cycling.
Yes they do--depending on delta-CTE, delta-T, column height, package size,
and number of required cycles.
>How can one calculate the size solder pillar required for a given CTE
difference?
Use IPC-D-279, Appendix A.

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
E-mail: [log in to unmask], Website: www.engelmaier.com

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