Patent ID: 7170789
Filing Date: 2007-01-30
Classification: G11C

Abstract:
1. A semiconductor storage device comprising: a memory cell array in which a plurality of memory cells for storing information pieces are arranged; a sense amplifier for reading information pieces stored in the memory cells; and one or a plurality of reference cells referred to read data stored in the memory cells by the sense amplifier, wherein each of the memory cell and the reference cell comprises: a gate electrode formed via a gate insulation film on a semiconductor layer; a channel region arranged under the gate electrode via the gate insulation film; diffusion regions, which are arranged on both sides of the channel region and have a conductive type opposite to a conductive type of the channel region; and memory function bodies, which are formed on both sides of the gate electrode and have a function to retain electric charge or polarization, wherein in each of the memory cells, information pieces independent from each other are stored in the memory function bodies located on both sides of the gate electrode, and the information pieces are independently read from the memory function bodies, and wherein in the reference cell, only the information piece stored in the memory function body located on one side of the gate electrode is referred to.