Patent ID: 6333244
Filing Date: 2001-12-25
Classification: H01L

Abstract:
A method of providing field effect transistors, the method comprising:providing a gate material over a semiconductor substrate;providing a first mask pattern having first apertures associated with N-type dopant gate conductors;providing N-type dopants through the first apertures;providing a second mask pattern having second apertures associated with P-type gate conductors;providing nitrogen type dopants through the second apertures to form a nitrogen barrier in the material above the semiconductor substrate;providing P-type dopants through the second apertures to the material;providing a third mask over the material, the third mask having features above the locations associated with the first apertures and the second apertures;removing the portions of the material in accordance with the features, whereby N-type gate conductors and P-type gate conductors are formed;annealing the N-type gate conductors and the P-type gate conductors;doping the substrate for source and drain regions; andannealing the substrate to form the source and drain regions.