Abstract

An advanced, general purpose GaAs/lnGaP HBT process has been developed at GEC Marconi Materials Technology Ltd. (GMMT). A range of digital and analogue circuit functions has been successfully implemented, demonstrating the capability of the process to provide high linearity and broadband circuits for communications applications. IP3-P1dB figures of up to 11.3dB have been measured and high density, high speed digital circuits have also been demonstrated with frequency divider toggle rates of over 16GHz. GMMT are also developing a variant of the process with improved breakdown voltage specifically for power applications. This paper gives an overview of the process technology and of demonstrated circuit performance. Results of accelerated lifetests are also presented.