Electrical breakdown in atmospheric air between closely spaced (0.2 /spl mu/m-40 /spl mu/m) electrical contacts
Electrical breakdown in atmospheric air between closely spaced (0.2 /spl mu/m-40 /spl mu/m) electrical contacts
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DOI：
10.1109/holm.2001.953218
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发表时间：
2001-09
期刊：
影响因子：
--
通讯作者：
P. Slade;E. Taylor
中科院分区：
文献类型：
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作者：
P. Slade;E. Taylor
空气中微米间距的电接触的重要性日益增加，促使最近的实验对这些间隙的电击穿行为。使用有限元分析来对电场进行建模，从而分析在其中一个实验中使用的触点之间的电场。击穿电压的实验数据可以分为三个区域作为差距间距的函数。首先，在紧密的间隙间距（/spl les/4 /spl mu/m）下，阴极处的击穿电压和电场均类似于小于200 /spl mu/m的真空间隙击穿期间测量的值。第二，在较大的间隙（>6 /spl mu/m），击穿电压遵循帕邢曲线的汤森电子雪崩过程在空气中。最后，在这两个区域之间，击穿值低于纯真空击穿或纯汤森击穿的预期值。击穿现象已被讨论的阴极和它们的影响，启动所观察到的击穿制度的电子的场发射。
The increasing importance of electrical contacts in air with micrometer spacing prompted recent experiments on the electrical breakdown behavior of these gaps. The electrical field between the contacts used in one of the experiments was analyzed, using finite element analysis to model the electric field. The experimental data on the electrical breakdown voltage could be divided into three regions as a function of the gap spacing. First, at close gap spacing (/spl les/4 /spl mu/m), both the breakdown voltages and the electrical fields at the cathode were similar to values measured during the breakdown of vacuum gaps of less than 200 /spl mu/m. Second, at larger gaps (>6 /spl mu/m), the breakdown voltages followed Paschen's curve for the Townsend electron avalanche process in air. Finally, in between these two regions, the breakdown values were below the expected values for purely vacuum breakdown or purely Townsend breakdown. The breakdown phenomena have been discussed in terms of field emission of electrons from the cathode and their effect on initiating the observed breakdown regimes.