Patent ID: 7407875
Filing Date: 2008-08-05
Classification: H01L

Abstract:
1. A method of fabricating a contact structure in a layer of dielectric material between a semiconductor device and a back-end-of-line interconnect, the method comprising: creating at least one contact opening in said layer of dielectric material, said at least one contact opening exposes a suicide contact surface of said semiconductor device; forming a first TiN film through a chemical-vapor deposition process, said first TiN film lining said contact opening; and forming a second TiN film through a physical vapor deposition process, said second TiN film lining said first TiN film, wherein forming said second TiN film comprises directionally sputtering a layer of Ti onto said first TiN film and subsequently converting said layer of Ti into said second TiN film though a post-deposition process; and wherein said post-deposition process comprises a forming gas annealing treatment, using a gas mixture of about 5-10% atomic H