Patent ID: 7544389

Claim:
A method for forming a ruthenium-containing film, comprising the steps of depositing a ruthenium-containing film on a substrate by introducing at least a precursor for film formation into a reaction chamber that contains at least one substrate, wherein said precursor is introduced in gaseous form and wherein the precursor comprises ruthenium tetroxide dissolved in non-flammable fluorinated solvent, having the general formula C x H y F z O t N u wherein: a) 2x+2≦y+z; b) 2≦x≦15; c) z>y; and d) t+u≧1, x, y, and z, being positive integers equal to or greater than 1, t and u being integers greater than or equal zero, and introducing a gaseous reducing agent into the reaction chamber and thereby depositing ruthenium on at least one substrate by reacting said gaseous precursors with the gaseous reducing agent.