Patent ID: 8237191

Claim:
A method of forming a semiconductor comprising: forming an emitter, base and collector of a HBT; forming a field effect transistor (FET) adjacent to the HBT on the same wiring level as the HBT; forming wiring structures in electrical connection to the FET and the emitter, base, and collector of the HBT; forming copper wiring layers in electrical connection to the wiring structures; masking the copper wiring layers of the FET and of the emitter, base, and collector of the HBT; patterning the masking to form an opening over the copper wiring layers of the HBT, the masking remaining over the copper wiring layer of the FET; selectively forming a metal conductive material on the wiring layers in electrical connection of the emitter, base and collector of the HBT, while the masking prevents the metal conductive material from forming on the copper wiring layer of the FET; and removing the masking from over the copper wiring layer of the FET after selectively forming the metal conductive material.