Patent ID: 9196380
Filing Date: 2015-11-24
Classification: G11C

Abstract:
1. A method for measuring data retention characteristic of an RRAM device, comprising the steps of: a) controlling a temperature of a sample stage to maintain the RRAM device at a predetermined temperature; b) setting the RRAM device to be a high-resistance state or a low-resistance state; c) measuring data retention time by applying a predetermined voltage to the RRAM device so that a resistive state failure of the RRAM device occurs; d) repeating the steps a)-c) a predetermined plurality of times no less than 10 times to perform a plurality of measurements; e) calculating a resistive state failure probability F(t) of the RRAM device from the data retention time in the plurality of measurements; and f) fitting the resistive state failure probability F(t), and calculating predicted data retention time t