Patent ID: 7235471
Filing Date: 2007-06-26
Classification: H01L

Abstract:
1. A method for forming a semiconductor device, the method comprising; providing a semiconductor substrate; forming an insulating layer over the semiconductor substrate; forming a conductive layer over the insulating layer; forming a first metal silicide layer over the conductive layer by performing an anneal and implanting nitrogen into the first metal silicide layer, wherein the first metal silicide has a first thickness; patterning the conductive layer to form a patterned first layer, wherein the patterned first layer is at least a part of a control electrode; patterning the first metal silicide layer to form a patterned first metal silicide layer over the control electrode so that the patterned first metal silicide layer remains over the control electrode; and forming a second metal silicide over the patterned metal silicide layer, wherein the second metal silicide layer comprises the first metal silicide layer, the second metal silicide layer has a second thickness, and the second thickness of the second metal silicide layer is greater than the first thickness of first metal silicide layer.