【作者】 郭晓荣；

【导师】 朱顺官；

【作者基本信息】 南京理工大学 ， 军事化学与烟火技术， 2012， 硕士

【摘要】 为了探索半导体桥(SCB)火工品在静电环境下的作用机理、易损特性和评估方法等,为SCB的静电防护提供有效的参考依据,使其更好的适应日益复杂的电磁环境,本文就静电脉冲对典型半导体桥(TSCB)和微型半导体桥(MSCB)的影响进行了研究。具体如下：(1)研究了静电作用下判别SCB失效的判据,主要包括：微光显微镜(EMMI)、烧蚀面积、I-V曲线和电阻变化等。(2)通过ESD作用前后半导体桥的点火实验,对点火时间和点火能量进行t-检验,得到：TSCB承受静电放电电压阈值为22kV,MSCB的失效阈值电压为14kV。(3)通过D-最优点火实验,得到：静电作用后TSCB和MSCB的全发火电压降低,电流峰值对应时间延迟,说明静电作用使得桥的感度提高,点火可靠性下降；在等离子体点火情况下,静电作用后的TSCB和MSCB,其形成等离子体的电压二次峰延后,非等离子体点火时,TSCB的峰值电压和峰值电流延后,而MSCB的峰值电压和峰值电流基本不变；随着静电电压的增大,静电作用后TSCB的I-V曲线斜率变小,而MSCB的I-V曲线斜率变大；模拟人体静电放电对TSCB和MSCB作用,发火概率为0,表明人体静电对TSCB和MSCB安全。(4)探讨了多次静电放电对TSCB和MSCB’性能的影响。对于TSCB而言,即使放电次数达到12次,桥区仍然不产生任何影响其性能的损伤；而对于MSCB来说,随着放电次数的增多,桥区的烧蚀面积呈指数增长,当达到8次时,桥区爆发,且静电后的MSCB电阻变化很大,相应的I-V曲线斜率差别很大,因此,I-V特性曲线和电阻的变化可以作为多次静电放电对SCB性能影响的判据。更多还原

【Abstract】 It is important to reveal the mechanism, features and evaluation methods of semiconductor bridge (SCB) under the electrostatic field for the design of the protection measures against the electrostatic discharge (ESD), thus it would be widely used in the increasingly complicated electromagnetic environment. In this thesis, the influence of the ESD on the typical semiconductor bridge (TSCB) and Micro semiconductor bridge (MSCB) is discussed as follows:(1) The invalidation criteria of SCB with ESD is studied, which includes emission microscope (EMMI), the ablation areas of the bridges, I-V curve and the resistance fluctuations.(2) T-test was employed to test the ignition energy and function time, and obtained that: 22kV is the invalidation threshold voltage of TSCB with ESD, however, the invalidation threshold voltage of MSCB is 14kV.(3) The features of SCB with ESD were evaluated by ignition experiments via D-optimal method, and concluded that:compared with the bare bridge, SCB which suffered ESD have the lower whole ignition voltage, longer response time of current peak, which indicated that the electrostatic make the bridge more sensitive and reduce the ignition reliability of SCB; In the case of plasma ignition, the secondary peak of voltage (the formation of plasma) about SCB with ESD was delayed; meanwhile, in non-plasma ignition, there is a difference between TSCB and MSCB. For TSCB, the peak current and voltage were delayed a little, but for MSCB, they were almost invariant. In additional, the I-V curve character of TSCB with ESD decreased along with the increasing of discharging voltage, but the different results was obtained in MSCB; Besides, SCB was taken to the experiment of human being discharge, and found that the firing probability is 0, so the human being discharge is safe to SCB.(4) Finally, the effect of multiple discharging on SCB was disscussed in this thesis. It is found that there was no melting zone about the film of TSCB until the times of discharging achieved to 12. But for MSCB, the ablation areas of the bridge is enlarging by exponential growth along with the increasing of discharging times, the resistance of the bridge have changed dramatically, and there is a significant difference about I-V curve character among the MSCB which suffered different discharging times. What’s more, MSCB would be break out when the discharging times reaches to 8. Therefore, I-V curve character and the resistance fluctuate evaluation are considered as the criteria of the SCB which suffered multiple discharging.更多还原