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000826476 1001_ $$0P:(DE-Juel1)159348$$aKim, Wonjoo$$b0$$ufzj
000826476 1112_ $$aESSDERC 2016 - 46th European Solid-State Device Research Conference$$cLausanne$$d2016-09-12 - 2016-09-15$$wSwitzerland
000826476 245__ $$aLowering forming voltage and forming-free behavior of Ta2O5 ReRAM devices
000826476 260__ $$bIEEE$$c2016
000826476 300__ $$a1
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000826476 500__ $$a ISBN 978-1-5090-2969-3
000826476 520__ $$aIn this paper, we investigate the impact of Ta and Ta2O5 thickness and of thermal treatment for the Ta2O5 layer on the forming and switching characteristics of Pt/Ta2O5/Ta/Pt ReRAM devices. The forming voltage (VFORM) decreases with increasing Ta and decreasing Ta2O5 thickness. However, VFORM saturates (~ 2 V) for thicker Ta layers. Thinner Ta2O5 switching layer can further reduce the forming voltage to <; 1 V for 3 nm-thick Ta2O5. However, thinner Ta2O5 degrades the ROFF / RON ratio and retention of the ReRAM device. On the other hand, thermal treatment of the Ta2O5 results in decrease of initial resistance and VFORM, and rapid thermal anneal at 600°C in O2 ambient induces forming-free behavior for 70% of the characterized devices. These forming-free devices show highly reliable switching operation up to 106 cycles with ROFF / RON > 10 and retention time of 104 s at 125 °C.
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000826476 7001_ $$0P:(DE-HGF)0$$aWouters, Dirk J.$$b1
000826476 7001_ $$0P:(DE-Juel1)158062$$aMenzel, Stephan$$b2$$ufzj
000826476 7001_ $$0P:(DE-Juel1)142194$$aRodenbucher, Christian$$b3$$ufzj
000826476 7001_ $$0P:(DE-Juel1)145504$$aRana, Vikas$$b4
000826476 7001_ $$0P:(DE-Juel1)131022$$aWaser, R.$$b5$$ufzj
000826476 773__ $$a10.1109/ESSDERC.2016.7599612
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