| 摘要 |
A semiconductor integrated circuit device of a master slice system having I/O cells for forming an input-output circuit formed so as to be able to select an input function or an output function, arranged in a radial layout around an internal cell array region. Each I/O cell forming region is tapered radially inward, smaller circuit elements of the I/O cell for forming the input-output circuit are disposed on the side of the internal cell array region, and larger circuit elements of the same are disposed on the side of the periphery of the semiconductor pellet. Thus, the semiconductor pellet is provided with more I/O cell forming regions than the semiconductor pellet of the same size of the conventional semiconductor integrated circuit device.
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