PCB板静电放电的仿真分析

为了研究静电放电对PCB板的影响, 建立了PCB板静电放电的三维模型, 利用CST微波工作室对PCB板的静电放电进行了仿真, 分析了PCB板空间电磁场的分布、表面电流分布及它们随时间的变化情况。仿真结果表明, 直接接触放电将会产生强电场、高电压、瞬时大电流及磁场脉冲, 静电电流的传播路径主要是沿着电路布线路径传播或沿着器件边缘及管脚回路传播, 静电放电对PCB板的损坏主要集中在PCB板的元器件的管脚、芯片及边缘处。

Interaction of Electrostatic Discharge and Printed Circuit Board: A Simulation and Experimental Study

The interaction of the electrostatic discharge (EDS), generated by an EDS simulator, and a typical printed circuit board (PCB) was mathematically modeled, numerically simulated with CST software and experimentally evaluated.The influence of the EDS-induced conduction and radiation interference on the time evolution of the profiles of the electromagnetic field and surface current in the PCB was investigated.The simulated results show that the direct contact EDS has a major impact.To be specific, it possibly produces the strongest electric field, high voltage, large instantaneous current and a magnetic field pulse.The EDS current mainly propagates through the PCB wiring, device edges and integrated circuit (IC) pins, presumably resulting in EDS damages of the IC chips, pins and sharp edges of component, etc.We suggest that the simulated results be of some technological interest in design optimization of advanced electronic products.