中文摘要：

首先建立了应变SiGe沟道PMOSFET的一维阈值电压模型，在此基础上，通过考虑沟道横向电场的影、响，将其扩展到适用于短沟道的准二维阈值电压模型，与二维数值模拟结果呈现出好的符合。利用此模型，模拟分析了各结构参数对器件阈值电压的影响，并简要讨论了无Sicap层器件的阈值电压。

英文摘要：

The 1-D threshold voltage model of strained SiGe channel PMOSFET is proposed first. Then based on the 1-D model, a quasi-2-D threshold voltage model for short-channel devices is built by considering the lateral electric field in channel. The simulation results match well with 2-D numerical simulated results. Using this model, influences of various structure parameters on threshold voltage of the devices are simulated and analyzed, and also threshold voltage of devices without Si cap layer is discussed.