Patent ID: 6388284
Filing Date: 2002-05-14
Classification: H01L

Abstract:
A capacitor comprising:a substrate having a node location; a field effect transistor gate proximate the node location, the field effect transistor gate having a top and a sidewall proximate the node location which are covered with insulative material; an insulative layer disposed over the substrate and on the insulative material, the insulative layer having an opening over the node location and the insulative material; a first polysilicon material layer having a first conductivity only partially filling the insulative layer opening, the first polysilicon material layer being disposed within the opening in contacting relationship with both the insulative layer and the insulative material covering the gate sidewall, and operably connected with the node location; a second polysilicon material layer over the first polysilicon material layer and received within and only partially filling the opening, the second polysilicon material layer having an outermost surface within the opening which has a generally roughened surface area; a non-polysilicon conductive layer over the second polysilicon material layer's outermost surface received within and only partially filling the opening, the non-polysilicon conductive layer having a second conductivity which is greater than the first conductivity; a capacitor dielectric layer over the conductive material layer; and a capacitor plate over the capacitor dielectric layer.