Patent ID: 7579235
Filing Date: 2009-08-25
Classification: H01L,Y10S

Abstract:
1. A method of fabricating a container capacitor comprising: forming a conductive first electrode container well; forming a capacitor structure within the well and on a predetermined portion of the exterior of the well, wherein the capacitor structure extends from the container well immediately adjacent the exterior of the well at two different levels, wherein the two levels are separated by a vertical spacing of at least 500 angstroms, a first level substantially at the top of the container and a second level below the top of the container; wherein the first electrode container well is surrounded on its exterior by a supporting dielectric, and wherein forming the capacitor structure comprises: forming recesses in the supporting dielectric to expose the predetermined exterior surface portion to the two different levels of supporting dielectric, wherein forming recesses comprises: removing the supporting dielectric not masked by the etch mask; depositing a capacitor dielectric layer on the interior of the first electrode container well and on the exposed portion of the exterior surface of the first electrode container well; and depositing a conductive top electrode over the capacitor dielectric layer, wherein the top electrode extends from the container at the two different levels.