Patent ID: 6015729
Filing Date: 2000-01-18
Classification: H01L

Abstract:
A method for forming a multiple multilayer capacitor structure comprising at least three series connected capacitors on a semiconductor substrate, comprising the steps of:a) forming a first conductive well structure in the substrate;b) forming a first insulating layer over at least a portion of the conductive well structure;c) forming a first thin film conductive layer structure over the first insulating layer;d) forming a second insulating layer over at least a portion of the first thin film layer;e) forming a second thin film conductive layer structure over the second insulating layer;f) bifurcating the second thin film conductive layer structure to form at least two conductive layers which are coplanar in the region above the first thin film layer;g) coupling a first one of the two layers which are coplanar in the region above the first thin film layer to a source of reference potential in the substrate, and a second one of the two conductive layers which are coplanar in the region above the first thin film layer to a conductive region in the substrate constructed and arranged for connection to circuitry external to the multilayer structure such that the second and third thin film conductive layers provide a pair of series connected capacitors,h) forming a third insulating layer over at least a portion of the second thin film layer; andi) forming a third thin film conductive layer structure over the third insulating layer such that each of said adjacent conductive structures is separated by an insulating layer.