Patent ID: 7741700
Filing Date: 2010-06-22
Classification: H01L

Abstract:
1. A semiconductor device comprises: a sub-collector layer formed on a semiconductor substrate, a bipolar transistor formed by stacking a collector layer, a base layer and an emitter layer in this order on said sub-collector layer, and a heat dissipating means dissipating heat generated in said bipolar transistor to said semiconductor substrate via a wiring connected with an emitter electrode of said bipolar transistor, wherein said heat dissipating means is a pn junction diode composed of same layers as said sub-collector layer, collector layer and base layer of said bipolar transistor and spatially separated from said bipolar transistor, wherein said collector layer of said bipolar transistor and said collector layer of said pn junction diode are electrically connected to a common collector electrode via said sub-collector layer, and wherein one terminal of said diode is connected with said wiring, and wherein a width of said wiring connecting between said emitter electrode of said bipolar transistor and said terminal of said diode is not less than the length of the emitter electrode.