Patent ID: 8604579

Claim:
A semiconductor device comprising: a substrate; a base coating film disposed over said substrate; an insulating film disposed over said base coating film; a semiconductor film disposed over said insulating film; and a light-shielding film disposed below said semiconductor film, wherein said light-shielding film is embedded in said base coating film, wherein said base coating film includes a concave part for embedding said light-shielding film therein, said concave part not reaching a bottom of said base coating film, wherein said light-shielding film is embedded in said concave part such that a surface of said light-shielding film on a side of said semiconductor film is substantially flush with a surface of said base coating film on a side of said semiconductor film, and wherein said concave part is formed in a reverse tapered cross-sectional shape progressively widening towards said insulating film so that the light-shielding film embodied in said concave part also has a reversed tapered cross-sectional shape progressively widening towards said insulating film.