Patent ID: 6281065
Filing Date: 2001-08-28
Classification: H01L

Abstract:
A semiconductor device fabrication method comprising:forming first and second regions defined by an element isolation region on a semiconductor substrate;forming an oxidation-resistant film on the semiconductor substrate;forming a collector layer on said first region;removing said oxidation film from said first region;forming a silicon oxide film selectively on said first region using said oxidation-resistant film as a mask;forming a base layer on said first region;forming an emitter layer disposed in the base layer region;forming an emitter electrode connected to said emitter layer via a contact hole formed through said silicon oxide film;removing said oxidation-resistant film from said second region after having formed a bipolar transistor comprising said collector layer, base layer, and said emitter layer; andforming a MOS transistor in said second region after having removed said oxidation-resistant film.