Patent ID: 6030894
Filing Date: 2000-02-29
Classification: H01L

Abstract:
A method for manufacturing a semiconductor device having a contact plug comprising the steps of:forming a diffusion layer of the opposite conductivity type in a predetermined region of a main surface of a silicon substrate of one conductivity type;forming an insulator film covering the entire surface;forming a contact hole extending in said insulator film to reach said diffusion layer of the opposite conductivity type;selectively forming a first silicon layer of the opposite conductivity type on the surface of said diffusion layer of the opposite conductivity type exposed on the bottom of said contact hole in-situ using selective growth;selectively forming a silicon-germanium alloy layer of the opposite conductivity type in-situ on the upper surface of said first silicon layer in said contact hole using selective growth;selectively forming a second silicon layer of the opposite conductivity type in-situ on the upper surface of said silicon-germanium alloy layer in said contact hole using selective growth; andforming wiring directly contact to the upper surface of said second silicon layer on a surface of said insulator film.