Patent ID: 7166904

Claim:
A method of forming a bipolar transistor contact stud with an integral resistor, said method comprising the steps of: a. providing a substrate having at least one contact area; b. forming an insulating layer over said substrate, said insulating layer overlying and in contact with the contact area; c. forming a contact hole in said insulating layer to expose the contact area; d. providing a first conductive material into the contact hole to form a contact stud having an upper surface and a lower surface, the lower surface in circuit connection with the contact area; and e. forming the integral resistor by disposing a resistive material layer within the contact hole on at least one of the contact stud upper surface and the contact stud lower surface; wherein said integral resistor is in a circuit series connection with said contact stud between the contact area and an electrical node of said bipolar transistor, the integral resistor has a resistance value of between about one Ohm and about ten Ohms, and the integral resistor is in circuit series connection with said contact stud with a base, emitter or collector of the bipolar transistor.