Bio-Sourced Unfilled Epoxy for Die-Attach Applications

This paper explores the potential of bio-sourced epoxy compounds derived from forest biomass for die-attach adhesive applications. We characterized the physicochemical and mechanical properties of synthesized bio-sourced epoxy mixtures and benchmarked them against commercial products. We discovered that properties vary significantly with the amine structure used for the bio-sourced hardener component. By combining structures, promising results were obtained, such as high mechanical performance, (adhesion higher than 5000 PSI and hardness above 85 Shore D), good thermal stability up to about 300°C and ease of processing for several hours when mixed. These results are comparable to those observed for commercially available epoxies, supporting their suitability for advanced packaging applications. While further development is required, particularly regarding moisture absorption, available mitigation paths combined with the observed tunability of the bio-sourced components propose a high change of success.