Patent ID: 8188547
Filing Date: 2012-05-29
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate; a first-conductivity-type transistor having: and a second-conductivity-type transistor having: a first adjusting metal for varying the threshold voltage of said first-conductivity-type transistor residing at the interface between said interfacial layer and said high-k gate insulating film, at least in said first-conductivity-type transistor, a diffusion suppressive element capable of suppressing diffusion of said first adjusting metal residing in said high-k gate insulating film, at least in said second-conductivity-type transistor, and the concentration of said diffusion suppressive element in said high-k gate insulating film of said second-conductivity-type transistor is higher than the concentration of said diffusion suppressive element in said high-k gate insulating film of said first-conductivity-type transistor.