Patent ID: 6110598
Filing Date: 2000-08-29
Classification: C23C,H01L,Y10T

Abstract:
A lamination structure of a tantalum nitride film and a nitrogen-free epitaxial tantalum film overlying the tantalum nitride film,wherein said tantalum nitride film has a hexagonal crystal structure having a first spacing of lattice planes in the range of 2.3 .ANG. to 2.6 .ANG.; andwherein said nitrogen-free epitaxial tantalum film has a body centered cubic crystal structure which forms a hetero-crystal structure interface with said hexagonal crystal structure of said tantalum nitride film, and said body centered cubic crystal structure of said nitrogen-free epitaxial tantalum film has a second spacing of lattice planes within 15% of said first spacing of lattice planes of said hexagonal crystal structure of said tantalum nitride film.