Patent ID: 6775198
Filing Date: 2004-08-10
Classification: G11C

Abstract:
A semiconductor storage unit comprising:multiple arrays that form memory banks on a substrate, each of the memory banks consisting of two of the multiple arrays; first power supplies, each of which supplies driving power to a peripheral circuit which drives each of the multiple arrays; and second power supplies, each of which supplies access power to word lines which access the multiple arrays, wherein multiple arrays are arranged in the form of a matrix and surround the central region of the substrate, wherein the first power supplies are mounted to a central region side and to an opposite side of the central region side for predetermined arrays, wherein the second power supplies are arranged at four corners of the central region, and wherein the first power supplies serve as a main power supply to provide main power and as an auxiliary power supply to provide auxiliary power, smaller than the main power, and provide distantly arranged two of the multiple arrays forming a memory bank with power.