Patent ID: 6576292
Filing Date: 2003-06-10
Classification: C23C

Abstract:
A method of forming a copper thin film on a metal nitride substrate comprising:preparing a substrate having a metal nitride barrier layer formed on a portion thereof; heating the substrate in a chemical vapor deposition reaction chamber to a temperature of between 160Â° C. to 250Â° C. for about one minute simultaneously introducing a copper precursor from the group of copper precursors consisting of CupraSelect, CupraSelect blend and (1-pentene)Cu(I)(hfac) mixed with 50% (vol.) 1-pentene into the chemical vapor deposition reaction chamber at an initial flow rate of less than 0.1 ml/min, and simultaneously providing an initial high wet helium gas flow in the chemical vapor deposition reaction chamber greater than 5 sccm; reducing the wet helium gas flow in the chemical vapor deposition reaction chamber to 5 sccm or less; and increasing the flow of copper precursor to between about 0.1 ml/min to 0.6 ml/min.