Super-scaled InP HBTs for 150 GHz circuits

Abstract

The development of InP heterojunction bipolar transistors (HBTs) with the emitter feature size less than 0.25 /spl mu/m is described. The key technical challenges in scaling to this dimension are reviewed and the technology approaches are enumerated. The development of these super-scaled InP HBTs is expected to enable mixed signal circuits with clock speeds in excess of 100 GHz.