International Business Machines Corporation
PLANARIZATION STOP REGION FOR USE WITH LOW PATTERN DENSITY INTERCONNECTS

Abstract:

Embodiments of the invention include a method of forming a multi-layer integrated circuit (IC) structure that includes forming a first dielectric layer from a first dielectric material. A first conductive interconnect is formed having a first conductive interconnect surface. The first conductive interconnect is positioned in a first portion of the first dielectric layer, and the first conductive interconnect surface has a first conductive interconnect surface area. A second conductive interconnect is formed having a second conductive interconnect surface. The second conductive interconnect is above the first conductive interconnect and positioned in a second portion of the first dielectric layer. The second conductive interconnect surface has a second conductive interconnect surface area that is less than a first conductive interconnect surface area of the first conductive interconnect. A planarization stop region is formed above the second conductive interconnect and in a third portion of the first dielectric layer.