Patent ID: 7745348

Claim:
A method for manufacturing a semiconductor device, comprising: forming a TaN thin film from a Ta precursor comprising pentakis ethylmethylamino tantalum (PEMAT), tertbutylimido tris-dimethylamide tantalum (TBTDET), pentakis diethylamide tantalum (PDEAT), or pentakis dimethylamide tantalum (PDMAT) by plasma-enhanced atomic layer deposition (PEALD) using a plasma gas comprising hydrogen (H 2 ) and nitrogen (N 2 ) at a temperature of 400° C. or higher on a substrate having a plurality of predetermined structures therein and/or thereon, wherein the TaN thin film contains not more than 10% of carbon impurities; depositing a seed copper layer on the TaN thin film; and forming a copper line on the seed copper layer.