Patent ID: 8753945
Filing Date: 2014-06-17
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising: forming a gate structure on a substrate, the gate structure including a gate insulation pattern and a gate electrode; forming a first spacer layer on a surface of the substrate conformal to the gate structure to a thickness of about 20 Å to about 50 Å; forming a second spacer layer on the first spacer layer; forming a second spacer on the first spacer layer corresponding to a sidewall of the gate structure by partially removing the second spacer layer from the first spacer layer; implanting first impurities in the substrate by an ion implantation process using the gate structure including the first spacer layer and the second spacer as an ion implantation mask to form source/drain extension regions at surface portions of the substrate around the gate structure; determining a distance of lateral diffusion of the first impurities in the substrate; and forming the first spacer layer plus the second spacer to have a thickness from the side all of the gate structure based on the determined distance.