Patent ID: 6207232
Filing Date: 2001-03-27
Classification: C07F

Abstract:
A method of forming a ruthenium containing film using a chemical vapor deposition process on a heated substrate comprising the steps of:producing bis(ethylcyclopentadineyl)ruthenium containing not more than ten parts per million of metallic impurities in total by reacting ruthenium chloride trihydrate and ethylcyclopentadiene with a zinc powder in an alcohol solvent;maintaining the produced bis(ethylcyclopentadienyl)ruthenium in a liquid state at a temperature above six degrees Celsius until used in the chemical vapor deposition process;vaporizing the bis(ethylcyclopentadienyl)ruthenium; andbringing the heated substrate into contact with the vaporized bis(ethylcyclopentadienyl)ruthenium in the chemical vapor deposition process,whereby the bis(ethylcyclopentadienyl)ruthenium does not solidify at a room temperature and the ruthenium containing film is formed on the substrate during the chemical vapor deposition process.