Patent ID: 6303453
Filing Date: 2001-10-16
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device comprising a MOS transistor comprising:forming a gate oxide (1A) and a gate electrode (2) on a surface of a semiconductor body (10) of silicon,forming a source region (3) and a drain region (4) in the semiconductor body (10) on either side of the gate electrode (2), providing, on either side of the gate electrode (2), the surface of the semiconductor body (10) with a dielectric layer (1B), obtaining the part of which bordering on the surface of the semiconductor body (10) by thermal oxidation of the semiconductor body (10),implanting first ions (I.sub.2) into the dielectric layer (1B), providing a spacer (5) on either side of the gate electrode (2),removing the parts of the dielectric layer (1B) which are situated outside the spacer (5),subsequently doping the semiconductor body (10) with doping atoms by implanting second ions (I.sub.1) in the semiconductor body to form a more heavily doped part (3B, 4B) of the source and drain regions (3, 4), andobtaining a more lightly doped part (3A, 4A) of the source and drain regions (3, 4) by diffusing a part of the doping atoms (D) from the dielectric layer (1B) situated beneath the spacer (5) into the semiconductor body (10).