Patent ID: 8975130
Filing Date: 2015-03-10
Classification: H01L

Abstract:
1. A method, comprising: forming a plurality of first active regions in a first region of a semiconductor substrate wherein a field effect transistor will be formed in and above each of said first active regions; forming a second active region in a second region of said semiconductor substrate wherein a bipolar transistor will be formed, said bipolar transistor comprising an emitter region; performing at least one common process operation to form a first gate structure above each of said first active regions for each of said field effect transistors and a plurality of second gate structures above said second active region, including said emitter region, wherein said first gate structures and said second gate structures have the same materials of construction and the same critical lateral dimension; with said plurality of second gate structures in position above said emitter region constituting an implant mask, performing at least one ion implantation process through said implant mask to implant dopant material into said emitter region; and after performing said at least one ion implantation process, performing at least one heating process to activate said implanted dopant material to form a continuous doped emitter region that extends under all of said plurality of second gate structures positioned above said emitter region.