Patent ID: 7235450
Filing Date: 2007-06-26
Classification: H01L

Abstract:
1. A method for fabricating a semiconductor device comprising: forming a gate electrode on an active region of a substrate of a first conductive type; implanting ions of a second conductive type into the active region to form LDD regions; forming spacers on sidewalls of the gate electrode; implanting ions of the second conductive type into the active region to form source/drain regions; implanting halo ions into the active region; activating ions in the source/drain regions, forming junctions between halo ion regions and the source/drain regions, and suppressing the diffusion of the halo ions toward the surface of the channel area under the gate electrode by performing a first thermal process; and deactivating the implanted ions in the source/drain region, forming defects in the source/drain regions from the deactivating of the implanted ions, diffusing the ions implanted into the substrate and the halo ions implanted into the halo regions by the forming of the defects, and moving the halo ions by the forming of the defects toward the surface of the channel under the gate electrode by performing a second thermal process, wherein the second thermal process is performed in an N