Patent ID: 9595441
Date: 2017-03-14
CPC Classifications: H01L

Claim:
1. A method of forming a pattern on a substrate, the method comprising: providing a substrate having mandrels positioned on a target layer, the mandrels comprising a first material and the target layer comprising a second material, the second material being chemically different than the first material; depositing a spacer material on the substrate, the spacer material selectively adhering to exposed surfaces of the mandrels without adhering to exposed surfaces of the target layer, resulting in spacers being formed in which the spacers have a substantially uniform thickness at least on sidewalls of the mandrels; depositing a filler material on the substrate that fills spaces defined by the spacer material on sidewalls of the mandrels, the filler material contacting the target layer through the defined spaces, the filler material forming a vertical interface with the spacers on sidewalls of the spacers, the filler material comprising a third material; and removing the spacers resulting in the filler material and the mandrels remaining on the substrate and together defining a combined pattern.