Patent ID: 9171630
Filing Date: 2015-10-27
Classification: G11C

Abstract:
1. A method for driving a semiconductor device comprising a memory cell, wherein the memory cell comprises a first transistor, a second transistor and a third transistor, wherein one of a source and a drain of the first transistor is electrically connected to a gate of the second transistor, wherein the other of the source and the drain of the first transistor is electrically connected to a bit line, wherein one of a source and a drain of the second transistor is electrically connected to one of a source and a drain of the third transistor, wherein the other of the source and the drain of the third transistor is electrically connected to the bit line, and wherein the second transistor is an n-channel transistor, the method comprising the steps of: writing data to the memory cell by turning on the first transistor; and reading the data from the memory cell by turning on the third transistor and charging a potential of the bit line.