Investigating molecular interactions between underfill resins and organic passivator layers via flow microcalorimetry

Contact angle measurements and flow microcalorimetry are two methods being investigated at Lehigh University, for their use in probing surfaces to look at acid-base interactions and strength of molecular interactions at interfaces. The practical adhesion between two phases depends on both the mechanical and energetic interfacial interactions of the phases. The energetic interaction may be divided into the dispersion and the acid-base interactions. In this paper the techniques are applied to interfaces between underfill resins and organic passivator layers.