Abstract:
Electrical interconnects for integrated circuits and methods of fabrication of interconnects are provided. Devices are provided comprising copper interconnects having metallic liner layers comprising silver and a second component, such as, lanthanum, titanium, tungsten, zirconium, antimony, or calcium. Methods include providing a substrate having a trench or via formed therein, forming a silver alloy layer, comprising silver and a second component selected from the group consisting of lanthanum, titanium, tungsten, zirconium, antimony, and calcium, onto surfaces of the feature, depositing a copper seed layer, and depositing copper into the feature.
Abstract:
Precursor and process design for photo-assisted metal atomic layer deposition (ALD) and chemical vapor deposition (CVD) is described. In an example, a method of fabricating a thin metal film involves introducing precursor molecules proximate to a surface on or above a substrate, each of the precursor molecules having one or more metal centers surrounded by ligands. The method also involves depositing a metal layer on the surface by dissociating the ligands from the precursor molecules using a photo-assisted process.
Abstract:
Electrical interconnects for integrated circuits and methods of fabrication of interconnects are provided. Devices are provided comprising copper interconnects having metallic liner layers comprising silver and a second component, such as, lanthanum, titanium, tungsten, zirconium, antimony, or calcium. Methods include providing a substrate having a trench or via formed therein, forming a silver alloy layer, comprising silver and a second component selected from the group consisting of lanthanum, titanium, tungsten, zirconium, antimony, and calcium, onto surfaces of the feature, depositing a copper seed layer, and depositing copper into the feature.