Patent ID: 8629002

Claim:
A manufacturing method of a semiconductor device comprising the steps of: (a) providing a wiring substrate having a base material of resin, a wiring layer formed over each of a front surface and a rear surface of the base material and a solder resist film covering the wiring layer while exposing a part of the wiring layer; (b) after the step (a), mounting a semiconductor chip over the solder resist film of the wiring substrate via an adhesive layer; (c) after the step (b), coupling electrically plural electrode pads arranged over the surface of the semiconductor chip with plural bonding leads that contains the part of the wiring layer and is exposed from an opening formed in the solder resist film by an electrical conductive member; and (d) after the step (c), forming a resin sealing body on the wiring substrate to cover the semiconductor chip, the electrical conductive member, and the adhesive layer, wherein the wiring substrate in the step (a) has previously been subjected to the steps of: (a1) performing a first heat treatment at a first temperature and a first treatment time; and (a2) performing a second heat treatment at a second temperature and a second treatment time; wherein the second temperature is higher than the first temperature; and wherein the second treatment time is shorter than the first treatment time.