Patent ID: 6323077
Filing Date: 2001-11-27
Classification: H01L

Abstract:
An inverse source/drain process using disposable sidewall spacer, for forming a MOSFET device on a semiconductor substrate, comprising the following steps:a gate oxide formation step for forming a gate oxide film on the surface of said semiconductor substrate;a first deposition step for depositing a conductive film on said gate oxide film;a photoresist mask formation step for forming a patterned photoresist film on said conductive film through the photolithography;a gate electrode formation step for etching said conductive film to form a gate electrode by using said patterned photoresist film as a mask;a second deposition step for depositing an insulating film over said gate electrode and said gate oxide film;a spacer formation step for partially etching said insulating film to form a disposable sidewall spacer adjacent to each of opposite sides of said gate electrode;a heavily doped region formation step for conducting a first ion implantation to form a heavily doped region within said semiconductor substrate;a spacer removal step for removing said disposable sidewall spacer;a first rapid thermal annealing step for reducing defects in said semiconductor substrate; anda lightly doped region formation step for conducting a second ion implantation to form a lightly doped region within said semiconductor substrate.