Patent ID: 7226858
Filing Date: 2007-06-05
Classification: H01L

Abstract:
1. A method for forming a contact on a substrate of a semiconductor integrated circuit, said method comprising the steps of: a) forming an opening in an insulating layer over a contact area on a semiconductor integrated circuit substrate; b) cleaning the opening and the contact area; c) depositing a layer of titanium (Ti) by ionized metal plasma (IMP) physical vapor deposition (PVD) in the opening and on the contact area; d) depositing a layer of titanium nitride (TiN) by chemical vapor deposition (CVD) on the layer of Ti deposited in step c); e) forming titanium silicide (TiSi f) depositing another layer of titanium nitride (TiN) by chemical vapor deposition (CVD) on the layer of titanium nitride (TiN) deposited in step d) and on the TiSi g) depositing another layer of titanium (Ti) by physical vapor deposition (PVD) on the another layer of TiN deposited in step f); h) depositing a layer of aluminum alloy by physical vapor deposition (PVD) on the layer of Ti deposited in step g), wherein the thickness of the layer of the deposited aluminum alloy is sufficient to substantially fill the opening; and i) depositing a layer of anti-reflective metal on the aluminum alloy deposited in step h).