Patent ID: 6479864
Filing Date: 2002-11-12
Classification: H01L

Abstract:
A semiconductor structure supported by a substrate, said structure comprising:a first series supported by a substrate, said first series comprising: a plurality of substantially parallel gate stacks, said gate stacks of said first series having a longitudinal axis defining a directional component of said first series, wherein at least one of said plurality of gate stacks of said first series comprises a gate oxide layer, a polysilicon gate layer on and in contact with said gate oxide layer, a refractory metal silicide layer on and in contact with said polysilicon gate layer, an undoped silicon dioxide layer having a top surface and a bottom surface, the bottom surface being on and in contact with said refractory metal silicide layer, a spacer extending from said gate oxide layer to said top surface, and said spacer being in contact with said gate oxide layer, said polysilicon layer, said refractory metal silicide layer, and said undoped silicon dioxide cap layer; and a second series supported by said first series, said second series comprising: a plurality of substantially parallel gate stacks, said gate stacks of said second series having a longitudinal axis defining a directional component of said second series, wherein at least one of said plurality of gate stacks of said second series comprises a second gate oxide layer, a second polysilicon gate layer on and in contact with said second gate oxide layer, a second refractory metal silicide layer on and in contact with said second polysilicon gate layer, a second undoped silicon dioxide layer having a top surface and a bottom surface, the bottom surface of said second undoped silicon dioxide layer being on and in contact with said second refractory metal silicide layer, a second spacer extending from said second gate oxide layer to said top surface of said second undoped silicon dioxide layer, and said second spacer being in contact with said second gate oxide layer, said second polysilicon layer, said second refractory metal suicide layer, and said second undoped silicon dioxide cap layer.