Patent ID: 7301781

Claim:
A power amplifier module including a power amplifying circuit for use in a mobile communication device, comprising: a module board having a plurality of wirings on an upper surface thereof and external electrode terminals on a lower surface thereof; a first semiconductor chip disposed over the upper surface of the module board; a second semiconductor chip overlapped to and above the first semiconductor chip with a gap therebetween; a first conductive wire electrically connecting the first semiconductor chip and a first wire connection pad disposed over the upper surface of the module board; a second conductive wire electrically connecting the second semiconductor chip and a second wire connection pad disposed over the upper surface of the module board; and an insulating resin covering the first and second semiconductor chips, wherein the first semiconductor chip includes the power amplifying circuit; the second semiconductor chip includes a control-use transistor which controls the power amplifying circuit; wherein the module board has a support on the upper surface thereof, said support body formed of a conductor; the second semiconductor chip is disposed on the support; a reference potential electrode is formed on a lower surface of the second semiconductor chip; and the support of the module board is electrically connected with the reference potential electrode.