Patent ID: 8298872

Claim:
A method of producing a semiconductor device having a structure wherein a semiconductor chip is mounted on a wiring circuit substrate and sealed with a resin, wherein the method comprises the steps of: forming a wiring circuit substrate having, on a metal support layer, a connecting conductor portion that can be connected to an electrode of the semiconductor chip in a way such that the wiring circuit substrate can be separated from the metal support layer, and such that the connecting conductor portion is located on the upper face side of the wiring circuit substrate, connecting the connecting conductor portion of the wiring circuit substrate and the electrode of the semiconductor chip to mount the semiconductor chip on the wiring circuit substrate, placing a sheet-shaped resin composition made of a sealing resin composition on the semiconductor chip mounted on the wiring circuit substrate, heating the sheet-shaped resin composition to seal the semiconductor chip with the sealing resin composition, and separating the metal support layer from the wiring circuit substrate after sealing.