Radiation effects in nitride read-only memories

被引:3
|
作者
Libertino, S. [1 ]
Corso, D. [1 ]
Mure, G. [1 ]
Marino, A. [1 ]
Palumbo, F. [2 ]
Principato, F. [3 ]
Cannella, G. [3 ]
Schillaci, T. [3 ]
Giarusso, S. [4 ]
Celi, F. [4 ]
Lisiansky, M. [5 ]
Roizin, Y. [5 ]
Lombardo, S. [1 ]
机构
[1] CNR IMM Sez Catania, I-95121 Catania, Italy
[2] CONICET CNEA, RA-1650 Buenos Aires, DF, Argentina
[3] Univ Palermo, Dip Fis & Tecnol Relat, I-90128 Palermo, Italy
[4] IASFPa INAF, I-90146 Palermo, Italy
[5] Tower Semicond Ltd, Migdal Haemeq, Israel
关键词
HEAVY-ION EXPOSURE; MODEL; NROM;
D O I
10.1016/j.microrel.2010.07.068
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We report on the influence of different types of radiation on the nitride read-only memories (NROM (R)). The memory cells were irradiated by light ions (Boron). X-rays and gamma-rays. Memory transistor parameters, such as threshold voltage and subthreshold drain leakage were studied as a function of the accumulated radiation dose and compared to the as-programmed (-erased) devices parameters. Their time evolution was registered in the range from few hours up to 5 months after the irradiation. The NROM cells showed good radiation robustness up to high accumulated doses. Sufficient program margin (difference of threshold voltage in the programmed state and the read-out voltage level) remained after gamma or X irradiation for absorbed doses exceeding 50 krad(Si) and 100 krad(Si), respectively. For Boron irradiation, the programmed devices remained stable up to the fluence of 10(11) ions/cm(2) (equivalent to 1 Mrad(Si) of TID tolerance). (C) 2010 Elsevier Ltd. All rights reserved.
引用
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页码:1857 / 1860
页数:4
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