Corrosion and Adhesion Properties of a Low-CTE Polybenzoxazole Film

Abstract

The corrosion and adhesion properties between conductive silver pastes and a novel, solution-processable low-CTE polybenzoxazole (PBO) film were studied. In this study, a polyester and an epoxy resin were used as the binders of conductive pastes. The pastes were coated on the PBO film, then thermally cured. The samples obtained were cut using the SAICAS slant-cut method to analyze the corrosion caused by the corrosive gases and to measure the interfacial peel force. The system using epoxy resin as the paste binder showed excellent corrosion resistance and adhesion properties. The results revealed that PBO film is a promising candidate in the area of new insulation materials having not only heat resistance, low CTE, and low water absorption but also corrosion resistance and good adhesion.