Surface Breakdown of Printed Circuit Board under Magnetic Field with Reduced Pressure  

作　　者：杜伯学 朱晓辉 高宇 卢欣 

机构地区：[1]Key Laboratory of Power System Simulation and Control of Ministry of Education, Tianjin University [2]Tianjin Electrical Power Science Research Institute

出　　处：《Transactions of Tianjin University》2010年第1期6-10,共5页天津大学学报（英文版）

基　　金：Supported by National Natural Science Foundation of China (No.50777048)

摘　　要：Epoxy resin laminate onto which a pair of copper foil was printed was employed as test samples.The samples were placed in an artificial atmospheric chamber, which was vacuumed by a rotary pump from 100 kPa to 5 kPa.The magnetic field was produced by permanent magnets that were assembled to make E×B drift away from, into and parallel to the sample surface, respectively.Magnetic flux density was adjusted at 120 mT, 180 mT and 240 mT respectively.By applying a negative bias voltage between the electrodes, the ...Epoxy resin laminate onto which a pair of copper foil was printed was employed as test samples.The samples were placed in an artificial atmospheric chamber, which was vacuumed by a rotary pump from 100 kPa to 5 kPa.The magnetic field was produced by permanent magnets that were assembled to make E×B drift away from, into and parallel to the sample surface, respectively.Magnetic flux density was adjusted at 120 mT, 180 mT and 240 mT respectively.By applying a negative bias voltage between the electrodes, the time to surface breakdown was recorded.Obtained results show that when E×B is into the surface, the time to the breakdown is shortened;when E×B is away from the surface, the time to the breakdown is delayed;when E×B is parallel to the surface, the time to the breakdown remains approximately the same as the case without magnetic field.With the decrease of pressure, the time to the breakdown increases and the effect of magnetic field on breakdown appears to be strengthened.

关 键 词：printed circuit board surface breakdown magnetic field ambient pressure 

分 类 号：TN41[电子电信—微电子学与固体电子学]