Patent ID: 8324718

Claim:
A semiconductor device comprising: a semiconductor chip having a first surface where bump electrodes are formed and a second surface opposite to said first surface, said semiconductor chip being mounted on a mounting substrate such that said first surface faces said substrate; a first resin filling a gap between the semiconductor chip and the mounting substrate, wherein the first resin includes an underfill part filling the gap between the semiconductor chip and the mounting substrate, and a fillet part extended from a region of the semiconductor chip; and a second resin in contact with the first resin and the mounting substrate, the second resin being smaller in a thermal expansion coefficient than the first resin, wherein the first resin and the second resin include an inorganic filler component, and wherein the inorganic filler component of the first resin is different in content amount than the inorganic filler component of the second resin, and further comprising a lid configured to cover the semiconductor chip, wherein the lid has a first surface having a first region facing a second surface of the semiconductor chip and a second region surrounding said first region and contacting said second resin.