Patent ID: 7259075
Filing Date: 2007-08-21
Classification: H01L

Abstract:
1. A method for manufacturing a field effect transistor, comprising: forming a gate electrode on an element formation surface of a semiconductor substrate and providing a halo region and an extension region in regions of said semiconductor substrate being in vicinity of said gate electrode; providing a source/drain region in said semiconductor substrate, after said providing the halo region and the extension region; and activating an impurity contained in an impurity-implanted region by heating said semiconductor substrate via a spike rapid thermal annealing (RTA), after said providing the source/drain region, wherein said providing the halo region and the extension region includes a first ion implantation process that comprises ion-implanting a first impurity having a first conductivity type into said semiconductor substrate, and a first flash lamp annealing process that comprises flash lamp annealing said semiconductor substrate after said first ion implantation process, and wherein said providing the source/drain region includes a second ion implantation process that comprises ion-implanting a second impurity having said first conductivity type into said semiconductor substrate after said first flash lamp annealing process, and a second flash lamp annealing process that comprises flash lamp annealing said semiconductor substrate after said second ion implantation process.