Hot-Carrier-Induced Reliability Concerns For Lateral Dmos Transistors With Split-Sti Structures
2021 5TH IEEE ELECTRON DEVICES TECHNOLOGY & MANUFACTURING CONFERENCE (EDTM)(2021)
摘要
In this work, four LDMOS devices with different split-STI structures (Device A: LDMOS with traditional split-STI, Device B: LDMOS with slope-STI, Device C with step-STI and Device D with H-shape-STI) have been fabricated and investigated. Because they own consistent breakdown voltage (BVoff, the hot-carrier stresses including the maximum substrate current (I-submax) stress and the maximum gate voltage (V-gmax) stress are carried out successfully. It is found that they exhibit different hot-carrier reliabilities due to the different STI structures. With the assistance of the T-CAD simulation tools, the inner mechanisms of these phenomena are discovered in detail.
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关键词
Split-STI, LDMOS and Hot-carrier
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