Patent ID: 7971351

Claim:
A method of manufacturing a semiconductor device; comprising: disposing a plurality of semiconductor elements on a first surface of a substrate; placing the substrate on a lower die; dispensing liquid resin on the substrate to form a plurality of domes each covering one semiconductor element; each dome containing a quantity of liquid resin for one semiconductor device; lowering an upper die to press onto the substrate and confining each individual dome of liquid resin in a recess; in which the liquid resin has a glass transition temperature in the range of 100-160° C., a coefficient of thermal expansion in the temperature region below the glass transition temperature in the range of 20-30 ppm, a coefficient of thermal expansion in the temperature region above the glass transition temperature in the range of 80-120 ppm, a longitudinal modulus in the temperature region below the glass transition temperature in the range of 1-20 GPa, and a longitudinal modulus in the temperature region above the glass transition temperature in the range of 0.1-1.0 GPa; lowering a pressing member on the liquid resin; and curing the liquid resin to form semiconductor devices having flat tops.