Hitachi, Ltd.

Yoshuhiro Fujimura

Atsushi Shimizu

Satoru Isomura

Tohru Kobayashi

Yuko Ito

Takeo Yamada

A semiconductor IC device has an input/output circuit and an internal logic circuit connected with the input/output circuit formed in a main surface of a semiconductor substrate of a generally rectangular shape. The input/output circuit is divided into at least two input/output circuit blocks in such a manner that edges of the logic circuit blocks defined by the division on the main surface of the substrate extend in a direction substantially parallel with a pair of opposite sides of the substrate. The internal logic circuit is divided into at least three logic circuit blocks in such a manner that edges of the logic circuit blocks defined by the division on the main surface of the substrate extend in the above-mentioned direction. Each of the input/output circuit blocks is sandwiched by and electrically connected with adjacently arranged two of the logic circuit blocks.

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Ome, Japan

Yoshuhiro Fujimura