Patent ID: 7411288

Claim:
A semiconductor device comprising: a metallic base plate; a semiconductor element arranged on the base plate; a first dielectric plate, arranged on the base plate, having a surface on which a circuit pattern is formed; a frame-shaped sidewall, provided on the base plate, surrounding the first dielectric plate and the semiconductor element; a power supply portion including insulator forming a part of the sidewall; a band-shaped conductor provided at a higher position than the surface of the first dielectric plate with respect to a main surface of the base plate, wherein the conductor penetrates through the power supply portion; a second dielectric plate, provided on the base plate, having a line conductor pattern formed on a surface of the second dielectric plate, the surface of the second dielectric plate being positioned at a height lower than the band-shaped conductor and higher than the first dielectric plate with respect to the main surface of the base plate; and an interconnection which connects the band-shaped conductor to the circuit pattern via the line conductor pattern.