半导体光电, 2015, 36 (5): 708, 网络出版: 2015-11-30
不同偏置条件下光电耦合器的总剂量效应
Total Dose Effect on Optocoupler under Different Bias Conditions
摘要
开展了4N49光电耦合器不同辐照偏置条件下的辐照实验,结果表明:电流传输比的下降幅度与辐照期间的偏置条件有关,处于工作状态的光电耦合器比短路状态的总剂量效应要弱,其根源是光电耦合器的LED施加了电流,而与光敏晶体管的偏置状态关系不大;电流传输比随偏置条件的变化关系是由初级光电流决定的,而CB区光响应度是初级光电流退化的主导因素。
Abstract
60Co irradiation on 4N49 optocouplers was developed under different bias conditions. The experimental results show that the degradation of current transfer ratio at a given total dose depends on bias condition during irradiation,and the degradation is lower under the condition of working than shortcircuit. The main reason comes from the current biased on LED and has little relation with phototransistor’s bias condition. The dependence of CTR on bias condition stems from primary photocurrent,and primary photocurrent degradation may be mainly attributed to the photoresponse degradation in CB region of phototransistor.
黄绍艳, 刘敏波, 盛江坤, 姚志斌, 王祖军, 何宝平, 肖志刚, 唐本奇. 不同偏置条件下光电耦合器的总剂量效应[J]. 半导体光电, 2015, 36(5): 708. HUANG Shaoyan, LIU Minbo, SHENG Jiangkun, YAO Zhibin, WANG Zujun, HE Baoping, XIAO Zhigang, TANG Benqi. Total Dose Effect on Optocoupler under Different Bias Conditions[J]. Semiconductor Optoelectronics, 2015, 36(5): 708.