SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE

摘要

PROBLEM TO BE SOLVED: To raise the current amplification factor of a bipolar transistor. SOLUTION: The semiconductor integrated circuit device has bipolar transistors each comprising a second conductivity type first semiconductor region formed on a main surface of a first conductivity type semiconductor substrate, a base region composed of a second conductivity type first semiconductor region formed in the first semiconductor region, an emitter region composed of a second conductivity type third semiconductor region formed in the second semiconductor region, and a collector region composed of a second conductivity type fourth semiconductor region formed in the second semiconductor region so as to be opposite to the third semiconductor region, and the first semiconductor region is electrically connected to the fourth semiconductor region.