Patent ID: 9093387
Filing Date: 2015-07-28
Classification: H01L

Abstract:
1. A method of forming a patterned structure comprising: forming a vertical stack including, from bottom to top, a metallic material layer, a first organic planarization layer, and a non-metallic hard mask layer over a dielectric material layer on a substrate; forming a cavity through said non-metallic hard mask layer, said first organic planarization layer, and said metallic material layer, wherein a top surface of said dielectric material layer is physically exposed underneath said cavity; applying a second organic planarization layer in said cavity and over said non-metallic hard mask layer; recessing an upper portion of said second organic planarization layer; removing said non-metallic hard mask layer; and removing a lower portion of said second organic planarization layer and said first organic planarization layer, wherein said top surface of said dielectric material layer is physically exposed again.