SEMICONDUCTOR STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a meshed power source and signal buses on an array type integrated circuit, which minimizes the size of the circuit.

SOLUTION: Through-holes for the mesh system are placed in sub-arrays 18a, 18b as well as the peripheral circuits. The power source buses and signal buses of the mesh system run in both vertical and horizontal directions across the array such that all the vertical buses lie in one metal layer M3, and all the horizontal buses lie in another metal layer M2. The buses of one layer are connected to the appropriate bus(es) of the other layer using the through-holes located in the array. The connected buses extend to the appropriate sense amplifier drivers.

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