Patent ID: 7893542

Claim:
A connecting structure for a flip-chip semiconductor package, comprising: a circuit board having a core layer and at least one build-up layer; a semiconductor element connected via metal bumps to the circuit board; and a sealing resin composition with which gaps between the semiconductor element and circuit board is filled, wherein a cured product of the sealing resin composition has a glass transition temperature between 60° C. and 150° C. and a coefficient of linear expansion from room temperature to the glass transition temperature being between 15 ppm/° C. and 35 ppm/° C., a cured product of the build-up layer has a glass transition temperature of at least 170° C. and a coefficient of linear expansion in the in-plane direction up to the glass transition temperature being not more than 40 ppm/° C., and stacked vias are provided in the build-up layer on at least one side of the core layer.