Patent ID: 9034716
Filing Date: 2015-05-19
Classification: H01L

Abstract:
1. A method for fabricating a fin-type field-effect transistor (FinFET) device, the method comprising: receiving a FinFET precursor, the FinFET precursor including: removing the dummy gate stacks to form a gate trench; depositing a gate dielectric layer in the gate channel region in the gate trench; forming a metal stressor layer (MSL) on the gate dielectric layer, wherein the MSL is selected to have substantial larger volume expansion during the thermal treatment, wherein the MSL includes amorphous-tungsten (α-W), wherein the α-W is formed by: depositing a capping layer on the MSL; performing a thermal treatment to the MSL; removing the capping layer after the thermal treatment; and forming a metal gate (MG) on the MSL.