Method for making a semiconductor device having a metal gate...

Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – Having insulated gate

Reexamination Certificate

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Reexamination Certificate

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06890807

ABSTRACT:
A method for making a semiconductor device is described. That method comprises forming a dielectric layer on a substrate, and forming an impurity containing metal layer on the dielectric layer. A metal gate electrode is then formed from the impurity containing metal layer. Also described is a semiconductor device that comprises a metal gate electrode that is formed on a dielectric layer, which is formed on a substrate. The metal gate electrode includes a sufficient amount of an impurity to shift the workfunction of the metal gate electrode by at least about 0.1 eV.

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