Patent ID: 8178432
Filing Date: 2012-05-15
Classification: H01L

Abstract:
1. A method for fabricating a semiconductor device comprising the steps of: forming one or more gate electrodes on a semiconductor substrate having device isolation films therein; forming first sidewall spacers on sidewalls of the one or more gate electrodes; injecting impurities into the semiconductor substrate using the one or more gate electrodes and the first sidewall spacers as a mask to form diffusion drain regions; removing the first sidewall spacers; implanting impurities into the semiconductor substrate to form lightly doped drain (LDD) regions; performing a thermal treatment to diffuse the impurities in the LDD region and form double diffusion junction regions; forming second sidewall spacers on sidewalls of the one or more gate electrodes; and forming source and drain regions in the double diffusion junction regions on opposite sides of each of the gates.