Patent ID: 8574675
Filing Date: 2013-11-05
Classification: C23C,H01L

Abstract:
1. A method of forming a ruthenium metal film in a vapor deposition process, comprising depositing ruthenium from a ruthenium precursor with an assistive metal species that increases the rate and extent of ruthenium nucleation in relation to deposition of ruthenium in the absence of such assistive metal species, wherein the assistive metal species is deposited on a substrate in a layer having a thickness of 0.8 to 8 Å before the deposition of the ruthenium, and the assistive metal species is selected from the group consisting of one or more assistive metal species containing strontium metal, calcium, barium metal, magnesium, titanium metal, zirconium metal, niobium, vanadium, iron and hafnium metal.