Patent ID: 6069040
Filing Date: 2000-05-30
Classification: H01L

Abstract:
A process for providing a substantially biplanar substrate structure having a first insulating material on a first plane of the substrate adjacent to a second insulating material on a second plane of the substrate, wherein the first plane is above the second plane, which comprises the following steps:a) forming an opening in the first insulating material and overlapping the second insulating material down to at least the first plane of the substrate, including exposing a first plane substrate area;b) forming a thin insulating layer on said first plane substrate area;c) forming a first conductive layer on the structure formed after step b) wherein said first conductive layer has first indentations over said opening;d) forming a second insulating layer on said conductive layer;e) planarizing said second insulating layer down to said conductive layer, including leaving portions of said second insulating layer in said first indentations;f) removing regions of the first conductive layer not located beneath said portions of said second insulating layer; andg) forming a device insulating layer, and then forming a second conductive layer over at least a portion of said first conductive layer.