Patent ID: 6683356
Filing Date: 2004-01-27
Classification: H01L

Abstract:
A semiconductor device comprising:a pair of source and drain regions each formed in a surface portion of a silicon layer, and spaced from each other through a channel region in a surface portion of a silicon layer in a channel length direction; a gate electrode layer formed on the channel region via an insulating film; a pair of sidewall insulating films formed on sides of the gate electrode layer respectively facing the source and drain regions; a pair of silicide layers respectively formed on the source and drain regions, and extending from the sidewall insulating films toward outer ends of the source and drain regions; and a pair of oxygen-introduced portions respectively formed in the source and drain regions, and extending under the silicide layers from the sidewall insulating films toward the outer ends of the source and drain regions, the oxygen-introduced portions containing oxygen atoms that are locally distributed on interfaces between the silicide layers and the silicon layers of the source or drain regions at a concentration of not less than 4.5Ã—1019 cmâˆ’3 and an areal density of not less than 5Ã—1013 cmâˆ’2 and, and the oxygen-introduced portions forming an Ohmic contact between the silicide layers and the silicon layers of the source or drain regions.