Transistors having controlled conductive spacers, uses of such transistors and methods of making such transistors

摘要

An improved transistor structure includes an insulated conductive gate spacer which is contacted and driven separately from the gate of the transistor. The gate spacer serves as a control or second gate for the transistor and may be used throughout an integrated circuit or it may be preferred to use the improved transistor only in critical speed paths of an integrated circuit. Delays within circuits including the improved transistor are reduced since the drain voltage can be higher than VCC and the BVDSS and subthreshold voltage are substantially higher than standard LDD transistors. When the improved transistor is used selectively within an integrated circuit, the remaining devices can be structured as standard LDD transistors using the gate spacers in a conventional manner.