Browsing by Author "Witters, Thomas"

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Direct Evidence of the Overshoot Suppression in Ta2O5-Based Resistive Switching Memory With an Integrated Access Resistor
(2015-10-01)
Fan, Yang-Shun
;
Zhang, Leqi
;
Crotti, Davide
;
Witters, Thomas
;
Jurczak, Malgorzata
We demonstrate suppression of the overshoot current effect on a resistive random access memory device with a TiN/Ta2O5/TaOx/TaN/TiN stack structure. Using test structures with an integrated 5-k Omega series resistor, a nearly 1:1 relation between the compliance current and the first maximum reset current has been achieved, together with an opening of the ON/OFF resistance window to over 100. Besides, the cell size also plays an important role on overshoot suppression, which we relate to the effect of the device self-capacitance discharge during the set switching. According to the experimental results, a simple model for the access circuitry is proposed, which is able to explain well the overshoot impact, by identifying the main capacitance discharge loops during device operation.