Hi Mark,
Your concern about too large thermocouples is appropriate--they definietely
impact the results. I did some work like this many years ago [Ref:
Engelmaier, W., "Thermal Characterization of Multilayer Printed Wiring Boards
During Lamination," Proc. 11th IEEE Electrical/Electronics Insulation Conf.,
Chicago, IL, October 1973, p. 208] and used 1-mil-diameter thermocouples--you
need to treat them gingerly however.

Werner Engelmaier
Engelmaier Associates, L.C.
Electronic Packaging, Interconnection and Reliability Consulting
7 Jasmine Run
Ormond Beach, FL  32174  USA
Phone: 904-437-8747, Fax: 904-437-8737
E-mail: [log in to unmask], Website: www.engelmaier.com

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