Semiconductor device

Abstract

A semiconductor device having a novel structure is provided. The semiconductor device includes memory layers and a driver circuit layer. The memory layers are stacked over the driver circuit layer and each include a memory cell array including a plurality of memory cells. Writing or reading of data to or from one of the memory cells is controlled with a write word line, a read word line, a write bit line, and a read bit line. The driver circuit layer includes a driver circuit portion configured to drive the write word line, the read word line, the write bit line, and the read bit line; and an arithmetic circuit portion. The driver circuit portion includes a plurality of driver circuits configured to control data writing or reading on the memory cell array basis. The arithmetic circuit portion is a circuit configured to perform arithmetic processing using the data retained in the memory cell array provided in each of the memory layers and read through the driver circuit portion.