Affiliation:
1. Room 7C 048 AT&T Bell Laboratories Whippany, NJ 07981
Abstract
The in-plane thermal expansion of woven glass fabric reinforced epoxy FR-4 laminates has been investigated by using a thermal mechanical analyzer. Linear ther mal expansion is observed at temperatures up to the onset of glass transition for the FR-4 laminates at 110°C. The linear thermal expansion coefficient is measured from 13 to 26 ppm/°C dependent upon the resin contents and the type of glass weaves used in the lami nates. A semi-empirical model based on the laminate analogy with multiple unidirectional plies is used to predict the thermal expansion coefficients of the FR-4 laminates in both warp and fill directions. Results calculated from the model agree well with the measure ments for the laminates with various weave styles and resin contents.
Subject
Materials Chemistry,Polymers and Plastics,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites
Reference7 articles.
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3. Thermal Expansion Coefficients of Composite Materials Based on Energy Principles
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