III-V MOSFETs with halo-doped bottom barrier layer

摘要

Techniques for controlling short channel effects in III-V MOSFETs through the use of a halo-doped bottom (III-V) barrier layer are provided. In one aspect, a method of forming a MOSFET device is provided. The method includes the steps of: forming a III-V barrier layer on a substrate; forming a III-V channel layer on a side of the III-V barrier layer opposite the substrate, wherein the III-V barrier layer is configured to confine charge carriers in the MOSFET device to the III-V channel layer; forming a gate stack on a side of the III-V channel layer opposite the III-V barrier layer; and forming halo implants in the III-V barrier layer on opposite sides of the gate stack. A MOSFET device is also provided.