Patent ID: 7060577
Filing Date: 2006-06-13
Classification: H01L

Abstract:
1. A method of forming a semiconductor device having a metal silicide by a low pressure chemical vapor deposition (LPCVD) process using a source gas of TiCl 4 , comprising the steps of: forming a source/drain junction area on a silicon substrate; forming an attack protection layer on the source/drain junction area, wherein the attack protection layer is electrically conductive and prevents a silicon substrate attack caused by chlorine (Cl) gases generated from the source gas of TiCl forming a titanium (Ti) layer over the attack protection layer through the LPCVD process; illuminating an ultra violet light having a higher energy than a binding energy of a SiCl reaction product on the surface of the Ti layer to remove remnant chlorine (Cl) components in the Ti layer; and diffusing the Ti layer into the attack protection layer to thereby form a metal silicide layer.