Method of producing semiconductor device

摘要

A method of producing a semiconductor device by which the resistivities of the base, collector, and source/drain regions in a Bi-CMOS are decreased and the production step is simplified. A method of producing a semiconductor device comprising the steps of forming a gate electrode (the first semiconductor layer) on a substrate; forming an insulating film; forming a second semiconductor layer; leaving the second semiconductor layer and the insulating film on the bipolar part and removing them on the CMOS part to form sidewalls on the side faces of the gate electrode; forming source/drain regions; forming a Ti layer over the entire surface and forming silicide on the surfaces of the second semiconductor layer, the source/drain regions, and the gate electrode; and forming a base electrode by patterning the second semiconductor layer.