A method for using a silicon germanium (SiGe) surface layer to integrate a
high-k dielectric layer into a semiconductor device. The method forms a
SiGe surface layer on a substrate and deposits a high-k dielectric layer
on the SiGe surface layer. An oxide layer, located between the high-k
dielectric layer and an unreacted portion of the SiGe surface layer, is
formed during one or both of deposition of the high-k dielectric layer
and an annealing process after deposition of the high-k dielectric layer.
The method further includes forming an electrode layer on the high-k
dielectric layer.