Patent ID: 7800214

Claim:
A semiconductor device having a package substrate and a semiconductor integrated circuit mounted on the package substrate, wherein the package substrate includes an upper surface and a lower surface opposed to the upper surface, wherein the semiconductor integrated circuit includes a front surface, a plurality of external connection terminals formed on the front surface, and a back surface opposed to the front surface, and is mounted on the upper surface of the package substrate such that the front surface of the semiconductor integrated circuit faces to the upper surface of the package substrate, wherein the plurality of external connection terminals include an external input terminal, an external output terminal, an external ground terminal, an external input/output power terminal, and an external power terminal, wherein the external input terminal and an external output terminal are able to input/output external data in parallel to each other, wherein the package substrate includes a plurality of module terminals arranged on the lower surface of the package substrate in an array and electrically connecting with the plurality of external connection terminals, wherein the package substrate includes a plurality of wiring layers having wiring patterns for electrically connecting the plurality of external connection terminals and the plurality of module terminals, wherein a first wiring layer of the plurality of wiring layers is formed on the upper surface of the package substrate, and has a first wiring for electrically connecting the external input terminal and a first module terminal of the plurality of module terminals, and wherein a second wiring layer of the plurality of wiring layers is formed on the lower surface of the package substrate, and has a second wiring for electrically connecting the external output terminal and a second module terminal of the plurality of module terminals.