Bsim3 学习笔记2

Threshold voltage model

Vth对器件操作有三种操作区：

Vg>>Vth in strong inversion region, drift current is dominant.

Vg<<Vth in weak inversion region, diffusion current is dominant.

Vg≈Vth in moderate inversion region, both drift and diffusion current are important.

Ps: drift 漂移；diffusion 扩散

漂移是在电场作用下的运动；扩散是在浓度差驱使下的运动

1. Threshold voltage model for long channel devices
2. Threshold voltage model for short channel devices
3. Narrow Width Effect Model
4. Threshold Voltage Model in BSIM3v3