Patent ID: 8901674
Filing Date: 2014-12-02
Classification: H01L

Abstract:
1. A p-type semiconductor device comprising: a gate structure present on a first portion of a semiconductor substrate, the gate structure comprising an aluminum containing threshold voltage shift layer of substantially pure aluminum having an aluminum purity of 99.5% or greater or TiAlN present on and in direct contact with the semiconductor substrate, a gate dielectric layer present on the aluminum containing threshold voltage shift layer, a metal nitride layer in direct contact with the gate dielectric layer, and a gate conductor in direct contact with the metal nitride layer; and p-type source and drain regions present in a portion of the semiconductor substrate that is adjacent to the first portion of the semiconductor substrate on which the gate structure is present, wherein the p-type semiconductor device has a threshold voltage ranging from −0.35 V to −0.1 V.