Three-dimensional InP-DHBT on SiGe-BiCMOS integration by means of Benzocyclobutene based wafer bonding for MM-wave circuits
Fabrication scheme for heterogenous Si-to-InP circuits on wafer level is described. Wafer-to-wafer alignment accuracy better than 48?m after bonding obtained. Interconnects with excellent performance up to 220GHz demonstrated. Palladium barrier necessary when combining Al-based technology with gold based one.
wafer bonding heterojunction bipolar transistors indium phosphide monolithic integrated circuits three-dimensional integrated circuits wafer scale integration