Patent ID: 7642201
Filing Date: 2010-01-05
Classification: C23C,H01L

Abstract:
1. A method of operating an Ionized Physical Vapor Deposition (IPVD) system to deposit a barrier layer, comprising: positioning a patterned substrate on a temperature-controlled substrate holder within a processing chamber; depositing a first TaN layer on the patterned substrate using a first Low Net Deposition (LND) procedure, a first TaN layer thickness being less than approximately five nanometers, wherein the first TaN layer has a (N/Ta) ratio greater than 0.4; depositing a second TaN layer on the first TaN layer on the patterned substrate using a first No Net Deposition (NND) procedure, a second TaN layer thickness being less than approximately three nanometer, wherein the second TaN layer has a (N/Ta) ratio less than 0.2; depositing a third TaN layer on the second TaN layer on the patterned substrate using a second LND procedure, a third TaN layer thickness being less than approximately five nanometers, wherein the third TaN layer has a (N/Ta) ratio greater than 0.4; depositing a fourth TaN layer on the third TaN layer on the patterned substrate using a second NND procedure, a fourth TaN layer thickness being less than approximately three nanometer, wherein the fourth TaN layer has a (N/Ta) ratio less than 0.2; and removing the patterned substrate from the processing chamber, the barrier layer having a crystallite size less than 2.4 nm.