Patent ID: 6879043
Filing Date: 2005-04-12
Classification: H01L

Abstract:
1. A method for fabricating a gate electrode structure comprising the steps of: forming a silicon-containing film containing silicon as a principal constituent; forming, on said silicon-containing film, a barrier metal layer of titanium nitride rich in titanium as compared with a stoichiometric ratio; forming a metal film with a high melting point on said barrier metal layer, whereby forming a multi-layer film including said silicon-containing film, said barrier metal layer and said metal film with a high melting point; and patterning said multi-layer film into said gate electrode structure, wherein said gate electrode structure is formed on a gate insulating film, wherein said step of forming said barrier metal layer includes a sub-step of using a target of titanium nitride rich in titanium as compared with a stoichiometric ratio and causing discharge in an inert gas including substantially no nitrogen, thereby depositing, on said silicon-containing film, the titanium nitride rich in titanium as compared with the stoichiometric ratio sputtered out from said target.