Patent ID: 8841192
Filing Date: 2014-09-23
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising: forming a gate stack on a semiconductor substrate, the forming the gate stack comprising: forming a first protective layer over the gate electrode to prevent formation of a silicide; forming a source/drain region in the semiconductor substrate adjacent the gate stack; forming a source/drain silicide region on the source/drain region; removing the first protective layer from over the gate electrode; forming a second protective layer in contact with the source/drain silicide region and over the spacers, wherein the second protective layer extends along the semiconductor substrate further than the source/drain silicide region; and siliciding at least a portion of the gate electrode to form a gate silicide region, wherein the gate silicide region comprises a metallic composition different from the source/drain silicide region and wherein a top surface of the gate silicide region is closer to the semiconductor substrate than a top surface of the second protective layer.