Stabilization of higher-κ tetragonal HfO2 by SiO2 admixture enabling thermally stable metal-insulator-metal capacitors
作者:T. S. Böscke、S. Govindarajan、P. D. Kirsch、P. Y. Hung、C. Krug、B. H. Lee、J. Heitmann、U. Schröder、G. Pant、B. E. Gnade、W. H. Krautschneider
DOI:10.1063/1.2771376
日期:2007.8.13
The authors report the relationship between HfO2 crystalline phase and the resulting electrical properties. Crystallization of amorphous HfO2 into the monoclinic phase led to a significant increase in leakage current and formation of local defects. Admixture of 10% SiO2 avoided formation of these defects by stabilization of the tetragonal phase, and concurrently increased the permittivity to 35. This