Patent ID: 7110307

Claim:
A semiconductor device, comprising: a plurality of bit lines; a plurality of word lines, each of which is placed so as to cross said bit lines; a plurality of memory cell transistors, each of which is placed at an intersection between said plurality of bit lines and said plurality of word lines and has a gate connected to a word line of the plurality of word lines, and each of which stores different data by making its drain connected or non-connected to a bit line of the plurality of bit lines; a word line selection circuit that selects a word line from among said plurality of word lines; a bit line selection circuit that selects a bit line from among said plurality of bit lines; a sense amplifier that determines the level of a bit line that has been selected via said bit line selection circuit in order to read out data of a memory cell transistor that corresponds to a word line that has been selected by said word line selection circuit and said bit line that has been selected by said bit line selection circuit; a data holding circuit having two output terminals for positive logic and negative logic, into which an output from said sense amplifier is inputted; and an output circuit of which an input terminal is connected to either one of the two output terminals of said data holding circuit, wherein: the connection/non-connection between the drains of memory cell transistors and bit lines is made through the formation/non-formation of first contact portions for making electrical connections between the drains of memory cell transistors and bit lines, the connection between one of the output terminals of said data holding circuit and the input terminal of said output circuit is made through the formation of a second contact portion for making an electrical connection between one of the output terminals of said data holding circuit and the input terminal of said output circuit, and said first contact portions and said second contact portion are formed in a same process step.