Patent ID: 9101067
Filing Date: 2015-08-04
Classification: H01L,H05K

Abstract:
1. A Cu wiring forming method for forming a Cu wiring by filling Cu in a recess formed in a substrate in a predetermined pattern, the Cu wiring forming method comprising: forming a barrier film comprising a TaAlN film on a surface of the substrate, wherein the TaAlN film is formed by thermal atomic layer deposition (ALD); forming a Cu film by filling the recess with the Cu film; and forming the Cu wiring in the recess by removing the barrier film and the Cu film formed outside the recess while leaving the barrier film and the Cu film formed in the recess, wherein the removing is performed by chemical-mechanical polish, wherein forming the barrier film comprises: forming a TaN unit film by a first thermal ALD process; and forming an AlN unit film by a second thermal ALD process.