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Producción Científica, A crucial step in order to achieve fast and low-energy switching operations in resistive random access memory (RRAM) memories is the reduction of the programming pulse width. In this study, the incremental step pulse with verify algorithm (ISPVA) was implemented by using different pulse widths between 10 μ s and 50 ns and assessed on Al-doped HfO2 4 kbit RRAM memory arrays. The switching stability was assessed by means of an endurance test of 1k cycles. Both conductive levels and voltages needed for switching showed a remarkable good behavior along 1k reset/set cycles regardless the programming pulse width implemented. Nevertheless, the distributions of voltages as well as the amount of energy required to carry out the switching operations were definitely affected by the value of the pulse width. In addition, the data retention was evaluated after the endurance analysis by annealing the RRAM devices at 150 °C along 100 h. Just an almost negligible increase on the rate of degradation of about 1 μ A at the end of the 100 h of annealing was reported between those samples programmed by employing a pulse width of 10 μ s and those employing 50 ns. Finally, an endurance performance of 200k cycles without any degradation was achieved on 128 RRAM devices by using programming pulses of 100 ns width., Ministerio de Ciencia, Innovación y Universidades - Fondo Europeo de Desarrollo Regional (grants TEC2017-84321-C4-3-R and MTM2017-88708-P)

Producción Científica, The reduction of the pulse width used during the programming of RRAM devices is crucial in order to accomplish fast low-power switching operations. In this work, several pulse width values between 10 μs and 50 ns were evaluated by using the incremental step pulse with verify algorithm (ISPVA) on Al-doped HfO 2 4 kbit RRAM arrays. 1k endurance cycles were performed to assess the switching stability, which showed a remarkable good behavior regardless the pulse width considered. Only the voltages required to perform the switching were impacted by the change of the pulse width. Nevertheless, the voltages needed for each pulse width remain stable along the 1k reset/set cycles. Finally, the data retention, after the endurance test, was evaluated at 150°C for 100 hours. Only a extremely slight increase on the degradation rate of 1 μA after 100 hours was reported between samples programmed by using pulse widths of 10 μs and 50 ns., German Research Foundation (project FOR2093), Ministerio de Economía, Industria y Competitividad (grant TEC2017-84321-C4-2-R)