Patent ID: 6225151
Filing Date: 2001-05-01
Classification: H01L

Abstract:
In a semiconductor process, a method of forming an insulated-gate field effect transistor (IGFET), the method comprising the steps of:providing a semiconductor body having a top surface;forming a gate structure on the top surface;introducing a first dopant implant into the semiconductor body to form a first and a second source/drain region aligned with the gate structure for the IGFET;forming a liner substantially beneath the first source/drain region, the liner providing a thermal diffusion barrier for the dopant of the first source/drain regionforming spacers beside the gate structure, andintroducing a second dopant implant dopant into the first and the second source/drain regions aligned with the spacers and the gate structure, the second dopant extending the first and the second source/drain region beneath the liner.