Patent ID: 6027962
Filing Date: 2000-02-22
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device including a bipolar transistor and a field-effect transistor formed on a semiconductor substrate comprising the steps of:forming an element isolating region on a main surface of said semiconductor substrate;forming a layered film by successively forming a gate insulating film, a first semiconductor film and a first insulating film on the main surface of said semiconductor substrate;removing said layered film located on an emitter region and a base region of said bipolar transistor;forming a second semiconductor film for an external base leader electrode on said emitter region and said base region;forming a second insulating film on said second semiconductor film;forming a first side wall insulating film on the side surface of said second semiconductor film and the side surface of said second insulating film, and removing said first insulating film on said first semiconductor film;forming a third semiconductor film on said first semiconductor film, and thereafter patterning said first and third semiconductor films to form a gate electrode;ion-implanting impurity into the main surface of said semiconductor surface of said semiconductor substrate masked with said gate electrode to form a pair of source/drain regions;patterning said second semiconductor film to form the external base leader electrode and an opening for the emitter;ion implanting impurity into the main surface of said semiconductor substrate through said opening for the emitter to form the base region;forming a second side wall insulating film at the side surface of said external base leader electrode located in said opening for the emitter; andforming a fourth semiconductor film having a portion located in said opening for the emitter and electrically connected to the main surface of said semiconductor substrate, and thereafter patterning said fourth semiconductor film to form an emitter electrode.