Abstract

In this paper, the effect of field implantation (FI) on off-and on-state characteristics for thin layer SOI field P-channel LDMOS (FPLDMOS) is investigated. FI effect mechanisms are revealed by modeling, simulating, verifying experimentally. The channel discontinuity gives rise to current step in output curve due to strong electric field and impact ionized generation. Back gate (BG) punch-through breakdown weakens severely block capability. Process parameters for FI technology are optimized to avoid channel discontinuity and BG punch-through breakdown. The rugged thin layer SOI FPLDMOS with channel continuity and punch-through breakdown voltage of −329 V is realized experimentally, and successfully applied in 200-V switching IC.

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