Patent ID: 7262514

Claim:
An epoxy resin composition for semiconductor encapsulation which is for use in producing a semiconductor device comprising an encapsulating resin layer and, encapsulated therein, a substrate, a semiconductor element mounted on the substrate, two or more conductive parts disposed around the semiconductor element, and electrically connecting parts which electrically connect electrodes of the semiconductor element to the conductive parts, wherein the bottom face of the substrate and the bottom face of each conductive part are exposed without being encapsulated in the encapsulating resin layer, and the epoxy resin composition used for forming the encapsulating resin layer has the following properties (α) and (β): (α) the epoxy resin composition has a melt viscosity as measured at 175° C. of from 2 to 10 Pa.s; and (β) the epoxy resin composition gives a cured resin having a flexural strength as measured at ordinary temperature of 130 MPa or higher.