Patent ID: 7015138

Claim:
A method of manufacturing a multi-layered barrier metal thin film by atomic layer chemical vapor deposition, comprising the steps of: providing a substrate in a reactant chamber; providing a first chemical species comprising a first metal, in said reactant chamber; providing a second chemical species in said reactant chamber, wherein said first and second chemical species react to deposit a first layer of a barrier metal thin film of a first metal nitride on said substrate by atomic layer chemical vapor deposition; providing a third chemical species comprising a second metal of a different material than the first metal, in said reactant chamber; and providing a fourth chemical species in said reactant chamber, wherein said third and fourth chemical species react to deposit a second layer of said barrier metal thin film of a second metal nitride directly on said first layer by atomic layer chemical vapor deposition; wherein said barrier metal thin film deposited on said substrate defines a thickness of less than 100 Angstroms; wherein said first layer of said barrier metal thin film and said second layer of said barrier metal thin film are each chosen from the group consisting of TiN, TaN, and WN.