Hi Dave,
there may be a 'reasonable' way, but not a sufficiently accurate one. If you want to know the CTE's of a PCB, you need to measure it—in all three directions, please.
Werner
Future workshops:
Pb-Free Soldering Processes: Survival, Quality, Reliability—PROBLEMS & SOLUTIONS, March 3, Santa Clara, CA
Solder Joint Reliability: Part 1—Solder Joint Reliability Fundamentals, March 29, Las Vegas
Pb-Free Soldering Processes: Survival, Quality, Reliability: PROBLEMS & SOLUTIONS, March 30, Las Vegas
-----Original Message-----
From: Dave Connitt <[log in to unmask]>
To: [log in to unmask]
Sent: Wed, 21 Jan 2009 6:34 am
Subject: [TN] method of calculating CTE of a rigid flex circuit board
Hello,
Does anyone know of a reasonably accurate way of calculating the overall
CTE of a 4 layer rigid flex circuit board?
Thanks,
Dave Connitt CID+
Printed Circuit Designer
L3 Fuzing & Ordnance Systems
A Wholly Owned Subsidiary of:
L3 Communications
3975 McMann Road
Cincinnati, Ohio 45245
Ph. 513- 943-2010 Fax 513-943-2288
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