Patent ID: 6452778
Filing Date: 2002-09-17
Classification: H01L

Abstract:
A capacitor structure in at integrated circuit, comprising:a semiconductor substrate having a first face upon which the integrated circuit is formed; a first conductive layer disposed over a portion of the first face of said semiconductor substrate and separated therefrom by a first insulating layer to form a lower plate of a capacitor; a second conductive layer disposed over at least a portion of said first conductive layer and sparated therefrom by a second insulating layer to form the upper plate of the capacitor; a third conductive layer disposed about said first and second conductive layers and separated from said first conductive layer by a third insulating layer, said third conductive layer having an opening therein of substantially the same shape as said second conductive layer and wherein the peripheral edges of said opening are substantially aligned with the peripheral edges of said second conductive layer; and a conductive interconnect disposed above said third conductive layer and separated therefrom by a fourth insulating layer and connected on at least a portion thereof to said second conductive layer, said interconnect extending over said third conductive layer such that said third conductive layer separates said interconnect from said first conductive layer.