| abstract |
High-speed and low-power-consuming transistors such as field effect transistors having strained Si channels and hetero-bipolar transistors are integrated with each other. Used here is a complex structure in which an MOSFET having a thin-film SiGe buffer layer and a strained Si channel are laminated on an insulating film and an HBT having an SiGe base layer formed on a thin-film SiGe layer by epitaxial growth and an Si emitter layer formed on the SiGe base layer are combined with each other. The thin-film SiGe layer formed on the insulating film of the MOSFET is made thinner than the counterpart of the HBT. The thin-film SiGe layer formed on the insulating film of the MOSFET has Ge concentration higher than that of the counterpart of the HBT. |