Hi Glenn, I do not have a copy of this reference, but from my experience and the rest of the literature I would rather strongly feel that the acceleration model given in the article represents more wishful thinking than reality. So my advice is be careful. Werner Engelmaier Engelmaier Associates, Inc. Electronic Packaging, Interconnection and Reliability Consulting 23 Gunther Street Mendham, NJ 07945 USA Phone & Fax: 973-543-2747 E-mail: [log in to unmask]