Patent ID: 6740562
Filing Date: 2004-05-25
Classification: H01L

Abstract:
A method for manufacturing a semiconductor device comprising:forming a collector region of a first conductivity type in a semiconductor body of the first conductivity type; depositing a polysilicon layer on the semiconductor body; introducing a first dose of a first impurity of a second conductivity type into the polysilicon layer; introducing a second dose of a second impurity of the first conductivity type into the polysilicon layer, the second dose being greater than the first dose; patterning the polysilicon layer to form a collector poly electrically connected to the collector region and an emitter poly spaced apart from the collector poly; and heat treating the semiconductor body having the collector poly and the emitter poly thereon to form an emitter region of the first conductivity type adjacent the emitter poly and a base region off the second conductivity type adjacent the emitter region.