Patent ID: 6297119
Filing Date: 2001-10-02
Classification: H01L

Abstract:
In a method of manufacturing a semiconductor device provided with a first bipolar transistor having a first conductivity type base region and a second bipolar transistor having a second conductivity type base region on a second conductivity type silicon substrate, the manufacturing method of the semiconductor device wherein the formation of impurity regions includes,a step of simultaneously forming a first conductivity type collector region of the second bipolar transistor and a first conductivity type isolation region for a second conductivity type collector region of the first bipolar transistor by means of an ion implantation of a first conductivity type impurity, anda step of simultaneously forming a second conductivity type base region of the second bipolar transistor and a second conductivity type temporary base region of the first bipolar transistor by means of an ion implantation of a second conductivity type impurity, then converting the second conductivity type temporary base region of the first bipolar transistor into a first conductivity type base region by means of an ion implantation of a first conductivity type impurity.