Patent ID: 7732292

Claim:
A method of forming a bipolar transistor, said method comprising: forming a collector in a substrate; forming an intrinsic base above said collector in said substrate; patterning an emitter pedestal on said substrate above said intrinsic base; forming a first extrinsic base implant region in portions of said substrate not protected by said emitter pedestal; removing said emitter pedestal; forming an emitter where said emitter pedestal was positioned; forming a second extrinsic base implant region in portions of said substrate not protected by said emitter; forming a sidewall spacer on said emitter; forming a third extrinsic base implant region in portions of said substrate not protected by said emitter and said sidewall spacer, wherein said first extrinsic base implant region, said second extrinsic base implant region, and said third extrinsic base implant region comprise an extrinsic base; and forming silicide regions on said extrinsic base and said emitter, wherein said silicide regions, said extrinsic base, and said emitter are all self-aligned with each other.