Patent ID: 8546959

Claim:
A granular resin composition for encapsulating a semiconductor element used for a semiconductor device obtained by encapsulating said semiconductor element by compression molding, satisfying the following requirements (a) to (c) on condition that ion viscosity is measured with a dielectric analyzer under a measurement temperature of 175° C. and a measurement frequency of 100 Hz: (a) the time from the initiation of the measurement until a decrease of the ion viscosity to the lowest ion viscosity is 20 seconds or shorter; (b) the lowest ion viscosity value is not more than 6.5; and (c) the time interval between the time from the initiation of the measurement until a decrease of the ion viscosity to the lowest ion viscosity and the time from the initiation of the measurement until the ion viscosity reaching 90% of an ion viscosity value measured at 300 seconds is 10 seconds or longer, wherein, in a particle size of said resin composition distribution as determined by sieving said resin composition for encapsulating and semiconductor element using JIS standard sieves microfine particles having a particle diameter of less than 106 μm is contained at a ratio of not more than 5% by mass, based on said resin composition for encapsulating said semiconductor element, wherein, in a particle size of said resin composition distribution as determined by sieving said resin composition for encapsulating said semiconductor clement using JIS standard sieves, coarse particles having a particle diameter of not less than 2 mm is contained at a ratio of not more than 3% by mass, based on said resin composition for encapsulating said semiconductor element.