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Mechanisms for Conduction Pathway Formation in Polymer Encapsulants

Published online by Cambridge University Press:  21 February 2011

J. E. Anderson ,
D. A. Hoffmann ,
C. W. Frank  and
L. J. Bousse
J. E. Anderson
Affiliation:
Research Staff, Ford Motor Company, Dearborn MI 48121
D. A. Hoffmann
Affiliation:
Dept. of Chemical Engineering, Stanford University, Stanford, CA 94305
C. W. Frank
Affiliation:
Dept. of Chemical Engineering, Stanford University, Stanford, CA 94305
L. J. Bousse
Affiliation:
Molecular Devices, Palo Alto CA 94304
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Abstract

This article concerns physicochemical mechanisms leading to formation of local heterogeneous structures in bulk polymers. Previous experimental work suggests that such heterogeneities are related to ionic conduction and electrochemical attack on encapsulated microelectronics. Six mechanisms are discussed: (a) Macrosyneresis; (b) Osmotic swelling; (c) Liquid-liquid phase separation; (d) Microsyneresis; (e) Polymer fracture during solvent sorption/desorption; (f) Polymer-substrate interactions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 154: Symposium K – Electronic Packaging Materials Science IV , 1989 , 65
Copyright
Copyright © Materials Research Society 1989

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