Patent ID: 6313488
Filing Date: 2001-11-06
Classification: H01L

Abstract:
A bipolar transistor having at least a low doped drift layer (7, 14) of crystalline SiC characterized in that it comprises:at least one first layer (2, 12, 13, 15, 16, 19) of a semiconductor material having a wider energy gap between the conduction band and the valence band than an adjacent layer of SiC, wherein the emitter (2, 13, 15) of the transistor is one said first layer;a continuous base layer (6) doped according to a first conductivity type and physically separating the emitter (2) and the collector (4) of the transistor, which are doped according to an opposite, second conductivity type; andan energy barrier means (11, 12) is arranged next to an electrode, making contact to the base layer, for introducing an energy barrier for minority charge carriers injected into the base layer from the emitter for reducing recombination of such minority charge carriers at the base contact electrode.