The Nature of White Residue on Printed Circuit Assemblies

Published:

May 7, 1999

Author:

Dennis F. Bernier, Vice President, Research & Development, Kester Solder

Abstract:

White residue remaining after cleaning circuit board assemblies can be caused by a variety of chemicals and reactions. Rosin and water-soluble fluxes, circuit board resins and epoxies, component materials and other contamination all contribute to this complex chemistry. This paper discusses many of the sources of the residues that seem to be an ever-increasing occurrence....

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Kester is a leading global supplier of assembly materials to the electronic assembly, component and microelectronic marketplaces.

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