Patent ID: 6224942
Filing Date: 2001-05-01
Classification: C23C,H01L

Abstract:
A method of forming an aluminum comprising line having a titanium nitride comprising layer thereon, the method comprising:in a processing tool, physical vapor depositing a first layer comprising at least one of elemental aluminum or an aluminum alloy over a substrate in a first chamber;physical vapor depositing at least one of elemental titanium or a titanium alloy on the first layer in a second chamber of the processing tool while at least an outer portion of the first layer is at a temperature of at least about 360.degree. C., and forming therefrom a second layer comprising an alloy of titanium and the aluminum from the first layer in the second chamber during said depositing, the alloy having a higher melting point than that of the first layer, and wherein essentially all the physical vapor deposited titanium alloys with the aluminum of the first layer;physical vapor depositing a third layer comprising titanium nitride on the second layer in the processing tool;removing the substrate from the processing tool after depositing the third layer; andforming the first, second and third layers into a conductive line.