Patent ID: 9184060
Filing Date: 2015-11-10
Classification: H01L

Abstract:
1. A method of forming recessed features on a substrate, the method comprising: (a) forming sacrificial posts on the substrate, said substrate comprising a conductive seed layer over an underlying material, wherein the sacrificial posts are formed directly above regions where the recessed features are to be formed in the underlying material; (b) depositing a metal hard mask material on the conductive seed layer around the sacrificial posts to form a metal hard mask layer through electroplating, electroless plating, or chemical vapor deposition; (c) removing the sacrificial posts to form openings in the metal hard mask layer; (d) removing the conductive seed layer in the openings in the metal hard mask layer; and (e) etching the underlying material to thereby form the recessed features directly under the openings in the metal hard mask layer.