Enhancement of adhesion ability and high-temperature stability of silver paste film by incorporation of SnO₂ conducting oxide

Abstract

The adhesion between silver paste film and ceramic substrate was improved by an incorporation of SnO₂ conducting oxide. The SnO₂ incorporated silver paste composite film was prepared by SnO₂ solution pouring into commercial silver paste. The SnO₂ in silver paste film was crystallized through high temperature anneal and the electrical property of the SnO₂–silver paste composite film was improved. A densification of the composite paste was enhanced with crystallized SnO₂ phase after high temperature anneal. The SnO₂ crystalline phase was contributed to electrical conductivity of composite paste due to its semiconducting behavior. After densification, void formation was effectively prevented by SnO₂ phase formation. By the incorporation of conducting oxide solution into commercial silver paste, we could use commercial resin-type silver paste on ceramic substrate.