Yu-Sheng Chen, T. Wu, P. Tzeng, Pang-Shiu Chen, Heng-Yuan Lee, Cha-Hsin Lin, Frederick T. Chen, M. Tsai
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Forming-free HfO2 bipolar RRAM device with improved endurance and high speed operation
A forming-free resistive memory of TiN/Ti/HfO2/TiN with a thin HfO2 film is demonstrated. The as-fabricated device can be operated without additional forming step to initiate the operation. This device with bipolar operation mode shows high speed (∼ 10 ns), robust endurance (≫ 106 times), good data retention (10-year lifetime), enough resistance ratio, and low power consumption. The simple structure and capability of multi-level operation demonstrate RRAM as a high-density memory in the near future.
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