E.i. Dupont De Nemours and Company

William H Morrison, Jr

Jay Robert Dorfman

Joel Slutsky

A silver composition is disclosed which contains silver powder or flake, a water soluble binder, an organic water soluble solvent and an inorganic binder. Generally, the composition will also contain water. The water soluble binder is especially chosen such that it has the property after dissolution in water, followed by water removal that it can be again dissolved in water (as opposed to water resistance as in a paint). The silver composition as a film or coating also lacks water resistance (prior to a firing operation) which can aid in pattern formation.

Water cleanable silver composition

A screen printable thick film paste composition comprising finely divided particles of electrically functional solids dispersed in an organic medium comprising a plurality of solid organic polymers having high and low relaxation rate constants (k.sub.r) dissolved in volatilizable organic solvent.

Screen-printable thick film paste composition

A method for preparing a dielectric ceramic composition containing hollow microspheres which is castable on a substrate in the form of a tape or sheet for multilayer circuits in which crushing or breaking of the microspheres is avoided, and a multilayer sheet structure formed from said tape.

Method for preparing ceramic tape compositions

Vesiculated polymer granules having high refractive indices can be made from an aqueous slurry of particulate TiO.sub.2 if the slurry contains a phosphate ester.

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Wilmington, DE, United States of America

William H Morrison, Jr