Patent ID: 6503844
Filing Date: 2003-01-07
Classification: H01L

Abstract:
A method of producing a semiconductor device comprising:forming a dielectric substrate; depositing a gate oxide layer atop the dielectric substrate; depositing a conductive film layer atop the gate oxide and a metal silicide layer over the conductive film layer, the deposition of the metal silicide layer forming a conductive stack; depositing a patterned silicon nitride mask layer over the conductive stack; over-etching the patterned silicon nitride mask layer whereby a notch is formed in the metal silicide layer at each side of the patterned silicon nitride mask layer; etching the conductive stack down to the gate oxide layer, the notch at each side of the patterned silicon nitride mask layer causing indentions to form in the conductive stack at the sides of the conductive film layer; forming an oxide sidewall, the oxide sidewall encompassing the conductive film and gate oxide layers, the oxide sidewall conforming to the shape of the indentions; forming a spacer around the silicon nitride mask layer and conductive stack; and forming a source and a drain in the dielectric substrate; whereby the indentions in the conductive stack result in decreased gate overlap between the gate and the source and drain.