Patent ID: 8288852

Claim:
A device, comprising: a first semiconductor package encapsulating a first semiconductor integrated circuit; a second semiconductor package encapsulating a second semiconductor integrated circuit having a different function than a function of the first semiconductor integrated circuit; and a printed circuit board; wherein the first semiconductor package is mounted on the printed circuit board: wherein the second semiconductor package is stacked and mounted on the first semiconductor package: and wherein the first semiconductor package comprises: a first power supply wiring connecting a power supply path of the first semiconductor integrated circuit and a power supply path of the printed circuit board; and a second power supply wiring connecting a power supply path of the second semiconductor package and the power supply path of the printed circuit board, the device further comprising: a third power supply wiring connecting the first power supply wiring and the second power supply wiring; and transfer signal wirings which are provided within the stacked package as intra-package transfer signal wirings and which transmit and receive a data signal between the first semiconductor integrated circuit and the second semiconductor integrated circuit, the intra-package transfer signal wirings comprising: a first signal wiring which is provided in the first semiconductor package; and a second signal wiring which is provided in the second semiconductor package and which is electrically connected to the first signal wiring; wherein: the first semiconductor package comprises a plurality of wiring layers; the third power supply wiring is provided in a top layer of the plurality of wiring layers of the first semiconductor package in which the first semiconductor integrated circuit is mounted; the first signal wiring is air-wired directly above the third power supply wiring through a wire bonding; and the third power supply wiring and the first signal wiring are wired so as to face each other.