Patent ID: 7919818
Filing Date: 2011-04-05
Classification: H01L,H03K

Abstract:
1. A semiconductor device comprising: a principal IGBT controllable in accordance with a gate voltage applied to a gate electrode thereof; a current detecting IGBT connected to the principal IGBT in parallel; and a current detecting circuit and a current detecting resistor for detecting a current passing through the current detecting IGBT, the principal IGBT including a first base region and a first emitter region formed in a surface portion of the first base region, the current detecting IGBT including a second base region and a second emitter region formed in a surface portion of the second base region, the second base region of the current detecting IGBT being connected to the first emitter region of the principal IGBT but not connected through the current detecting circuit, the current detecting resistor unit and a first collector region of the principal IGBT, the second emitter region of the current detecting IGBT being connected to the first emitter region of the principal IGBT through the current detecting resistor.