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TECHNICAL PAPERS

An Investigation of PWB Layout by Genetic Algorithms to Maximize Fatigue Life

[+] Author and Article Information
A. J. Scholand, R. E. Fulton

Advanced Electronic Packaging Laboratory, Manufacturing Research Center, 813 Ferst Drive, NW, Georgia Institute of Technology, Atlanta, GA 30332

B. Bras

System Realization Laboratory, George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA

J. Electron. Packag 121(1), 31-36 (Mar 01, 1999) (6 pages) doi:10.1115/1.2792658 History: Received January 07, 1995; Revised March 25, 1996; Online November 05, 2007

Abstract

Thermal considerations in printed wiring board (PWB) assemblies are becoming increasingly important as packaging constraints shrink and power use escalates. In this paper, we provide a study on the potential for a genetic algorithm-driven PWB layout design tool to improve the thermal performance of such assemblies. As a case study, the thermomechanical fatigue of surface mounted leadless chip carriers on an FR4 epoxy board is used. We have found that by utilizing appropriate formula-based engineering approximations, the efficiency of parallel implementations of genetic algorithms in finding near-optimal and results makes this approach effective as an explorative “scouting” approach to identify promising board configurations for more computationally expensive evaluations such as finite element method.

Copyright © 1999 by The American Society of Mechanical Engineers
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