Patent ID: 9312190
Filing Date: 2016-04-12
CPC Classification: H01L

Claim Text:
1. A method of manufacturing a semiconductor device, comprising: forming a first TiN layer in a PMOS of a substrate; forming an Al thin film over the first TiN layer in the PMOS region and in a NMOS region of the substrate; forming a second TiN layer over the Al thin film; forming each of a first and a second TiAlN layers in the NMOS region and the PMOS region by annealing the substrate on which the second TiN layer is formed; and forming a first metal gate electrode in the NMOS region and a second metal gate electrode in the PMOS region by patterning the first and the second TiAlN layers, wherein the first TiAlN layer and the second TiAiN layer have a different composition.