Patent ID: 6406951
Filing Date: 2002-06-18
Classification: H01L

Abstract:
A method for fabricating a field effect transistor on a semiconductor substrate in SOI (semiconductor on insulator) technology, the method including the steps off:A. depositing a film of semiconductor material on a layer of buried insulating material formed on said semiconductor substrate; B. depositing a layer of active insulating material on said film of semiconductor material; C. patterning a masking material to form a masking structure and etching away any portion of said layer of active insulating material and said film of semiconductor material not under said masking structure; wherein said layer of active insulating material remaining under said masking structure forms an insulating block, and wherein said film of semiconductor material remaining under said insulating block forms a semiconductor island; D. removing said masking structure from top of said insulating block; E. growing a semiconductor material from sidewalls of said semiconductor island to extend up along sidewalls of said insulating block to form a raised drain structure on a first side of said insulating block and said semiconductor island and to form a raised source structure on a second side of said insulating block and said semiconductor island; F. implanting a drain and source dopant into said raised drain and source structures; G. performing a thermal anneal to activate said drain and source dopant within said raised drain and source structures and such that said drain and source dopant extends partially into said semiconductor island; H. etching away said insulating block to form a block opening; I. depositing a gate dielectric at a bottom wall of said block opening; J. filling said block opening with a conductive material to form a gate structure disposed over said semiconductor island, wherein a portion of said semiconductor island disposed under said gate structure forms a channel region that is fully depleted during operation of said field effect transistor; and K. forming a drain silicide within said raised drain structure and forming a source silicide within said raised source structure.