Patent ID: 6225704
Filing Date: 2001-05-01
Classification: H01L

Abstract:
A flip-chip type semiconductor device comprising a substrate having a wiring pattern-bearing surface and a semiconductor chip mounted on the wiring pattern-bearing surface via a plurality of bumps to define a gap between the substrate and the semiconductor chip, the gap being filled with an underfill material and sealed along sides thereof with a fillet material, whereinthe underfill material is a cured product of a first epoxy resin composition comprising a liquid epoxy resin and an inorganic filler, having a coefficient of expansion of 20 to 40 ppm/.degree. C. at temperatures below its glass transition temperature, andthe fillet material is a cured product of a second epoxy resin composition comprising a liquid epoxy resin and an inorganic filler, having a coefficient of expansion of up to 20 ppm/.degree. C. at temperatures below its glass transition temperature.