Patent ID: 7045876

Claim:
A bipolar transistor comprising recrystallized amorphized semiconductor portions to achieve improved performance comprising: a semiconductor substrate having formed therein: an intrinsic base region of a first polarity which includes a surface of the semiconductor substrate; an extrinsic base region of the first polarity formed adjoining the intrinsic base region; a collector region of a second polarity opposite the first polarity formed within the semiconductor substrate and beneath the intrinsic base region; and, a polysilicon emitter layer formed upon the intrinsic base region and separated from the extrinsic base region, wherein a portion of the intrinsic base region interposed between the extrinsic base region and the polysilicon emitter layer comprises recrystallized amorphized semiconductor, said amorphized semiconductor having incorporated therein a non-active dopant to form said amorphized semiconductor.