Patent ID: 7314796

Claim:
A method of forming a memory wordline, the method comprising: forming a first gate dielectric; forming a charge storage layer on the first gate dielectric; forming a second dielectric layer on the charge storage layer; depositing a first poly-Si portion on said second dielectric layer using a first gas comprising PH 3 with a first PH 3 gas flow rate; depositing a second poly-Si portion on said first poly-Si portion using the first gas with a second PH 3 gas flow rate, wherein the second PH 3 gas flow rate is higher than the first PH 3 gas flow rate, and said first poly-Si portion and said second poly-Si portion constitute a control-gate poly layer; depositing a tungsten silicide layer on said control-gate poly layer with at least one silane-based and one tungsten-based gas, wherein said control-gate poly layer and tungsten silicide layer are then patterned to form a gate electrode, and a wordline is formed from a stacked film of said control-gate poly layer and tungsten silicide layer; and implanting said gate electrode.