Patent ID: 7871942
Filing Date: 2011-01-18
Classification: C23C,H01L

Abstract:
1. A method for forming a high K dielectric hafnium-containing silicate film in a MOSFET comprising: reacting an ultra-high purity hafnium containing organometallic compound in a processing chamber to form the hafnium-containing silicate film on a substrate, the hafnium containing organometallic compound comprising less than about 250 ppm zirconium, less than about 1 ppm lead, less than about 0.15 ppm sodium and less than about 3 ppm aluminum; performing a post-deposition annealing of the substrate at a temperature in the range of about 500° C. to about 650° C.; incorporating nitrogen into the film; and performing a post-nitridation annealing of the substrate, the film exhibiting a leakage current density less than about 10