Patent ID: 8724368
Filing Date: 2014-05-13
Classification: G11C,H01L

Abstract:
1. A method for driving a semiconductor memory device, the method comprising steps of: a step (a) of preparing the semiconductor memory device; wherein the semiconductor memory device comprises: each memory cell ( the ferroelectric film ( the source electrode ( the first gate electrode ( the second gate electrode ( the first word line (WL the second word line (WL the first top gate word line (WTG the first bottom gate word line (WBG the second top gate word line (WTG the second bottom gate word line (WBG the first bit line (BL the source electrode ( the second bit line (BL the source electrode ( each of the first to third memory cells ( the fourth memory cell ( a step (b) of applying voltages BL where BL BL WTG WBG WTG WBG a step (c) of applying voltages BL a step (d) of applying voltages BL wherein an inequality set: t where t t