Patent ID: 7671381

Claim:
A semiconductor device including a high frequency transmission power amplifier for mobile communication equipment, comprising: a wiring substrate including a top surface and a bottom surface opposite to each other; a semiconductor chip disposed over the top surface of the wiring substrate, the semiconductor chip including: a first amplification stage and a second amplification stage each comprising the high frequency transmission power amplifier, the first and second amplification stages being electrically coupled in cascade; a controlling circuit controlling the first and second amplification stages; a first capacitor including upper and lower electrodes comprised of metal films, wherein each of the first and second amplification stages are comprised of a first MOSFET and a second MOSFET, respectively, wherein the controlling circuit is comprised of CMOSFETs, wherein the first and second amplification stages are electrically coupled through an inter-stage matching circuit, and wherein the inter-stage matching circuit is comprised of the first capacitor.