Investigation of a novel SOI LDMOS using p+ buried islands in the drift region by numerical simulations
Journal of Computational Electronics(2018)
摘要
novel SOI LDMOS with p+ buried islands and p-top layer in the drift region (PBI SOI) is proposed in this letter. At off-state, the high potential is induced from the drain region to the inside of the drift region. The p+ buried islands cause reduced surface field effect and modulate the electric field distribution in the drift region. The buried p-top layer withstands the lateral drain voltage. Thus, the breakdown voltage (BV) of PBI SOI is significantly improved. Meanwhile, the specific on-resistance (R_on,sp) is reduced by improving doping concentration of the drift region, owing to the assisting depletion effect caused by the p+ buried islands. Consequently, the R_on,sp of the proposed structure is reduced by 53.7
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关键词
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