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Open Access Nano Express

Total ionizing dose (TID) effects of γ ray radiation on switching behaviors of Ag/AlO x /Pt RRAM device

Fang Yuan12, Zhigang Zhang1, Jer-Chyi Wang2*, Liyang Pan1, Jun Xu1* and Chao-Sung Lai2

Author Affiliations

1 Institute of Microelectronics, Tsinghua University, Tsinghua Yuan 1st, Haidian District, Beijing 100084, China

2 Department of Electronic Engineering, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan 333 Tao-Yuan, Taiwan

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Nanoscale Research Letters 2014, 9:452  doi:10.1186/1556-276X-9-452

Published: 29 August 2014

Abstract

The total ionizing dose (TID) effects of 60Co γ ray radiation on the resistive random access memory (RRAM) devices with the structure of Ag/AlOx/Pt were studied. The resistance in low resistance state (LRS), set voltage, and reset voltage are almost immune to radiation, whereas the initial resistance, resistance at high resistance state (HRS), and forming voltage were significantly impacted after radiation due to the radiation-induced holes. A novel hybrid filament model is proposed to explain the radiation effects, presuming that holes are co-operated with Ag ions to build filaments. In addition, the thermal coefficients of the resistivity in LRS can support this hybrid filament model. The Ag/AlOx/Pt RRAM devices exhibit radiation immunity to a TID up to 1 Mrad(Si) and are highly suitable for radiation-hard electronics applications.

Keywords:
Total ionizing dose (TID) effects; γ ray radiation; RRAM; Hybrid filament model; Filament; Radiation-induced holes