Contact area to trench silicide resistance reduction by high-resistance interface removal
Abstract:
A method for manufacturing a semiconductor device comprises forming a silicide region on a semiconductor substrate, forming a gate structure on the semiconductor substrate adjacent the silicide region, forming a dielectric layer on the gate structure and on the silicide region, forming a first liner layer on the dielectric layer, removing a portion of the first liner layer and a portion of the dielectric layer to form an opening exposing a top surface of the silicide region, forming a second liner layer on the first liner layer and on sides and a bottom of the opening, removing a portion of the second liner layer from a top surface of the first liner layer and from the bottom of the opening to re-expose a portion of the top surface of the silicide region, and forming a contact layer in the opening directly on the re-exposed portion of the top surface of the silicide region.
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