Patent ID: 7476615

Claim:
A method comprising: providing a semiconductor substrate in a reactor, wherein the semiconductor substrate includes a trench etched into a dielectric layer; introducing a ruthenium precursor and a co-reactant into the reactor proximate to the semiconductor substrate to form a ruthenium containing layer, wherein the ruthenium precursor comprises at least one of [Ru(CO) 3 (3,5-(I 3 C) 2 -pz)] 2 , Ru(CO)(thd)(3,5-(I 3 C) 2 -pz), (acrylonitrile)Ru(CO) 3 (3,5-(I 3 C) 2 -pz), [Ru(CO) 2 (COD)(3,5-(I 3 C) 2 -pz)] 2 , (butene)Ru(CO) 2 (3,5-(I 3 C) 2 -pz), (benzene)Ru(3,5-(I 3 C) 2 -pz), CpRu(CO)(3,5-(I 3 C) 2 -pz), [CpRu(CO)(3,5-(I 3 C) 2 -pz)] 2 , (COD) 2 Ru(3,5-(I 3 C) 2 -pz), [Ru(CO) 2 (Allyl)(3,5-(I 3 C) 2 -pz)] 2 , or [Ru(CO) 2 (C 6 H 8 )(3,5-(I 3 C) 2 -pz)] 2 ; and depositing a metal layer on the ruthenium containing layer.