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Syntheses and Characterizations of Thermally Reworkable Epoxy Resins II - Published online 31 August 2000 - To meet the need of reworkable epoxy resins for flip chip application four cycloaliphatic epoxides containing thermally cleavable carbonate linkages have been synthesized and characterized. These materials are shown to undergo curing reactions with cyclic anhydride similarly to a commercial cycloaliphatic diepoxide. Furthermore, these cured epoxides start to decompose at temperatures lower than 350 (degree)C, the decomposition temperature for the cured sample of the commercial cycloaliphatic diepoxide. Two formulations based on two carbonate-containing diepoxides start network breakdown around 220 (degree)C, which is the targeted rework temperature. These two formulations are potential candidates for a successful reworkable underfill./
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