Patent ID: 9514955
Filing Date: 2016-12-06
CPC Classification: H01L

Claim Text:
1. A method for processing a substrate, comprising: providing a substrate including a photoresist/bottom anti-reflection coating (PR/BARC) layer, a hard mask layer, a stop layer, a carbon layer and a stack including a plurality of layers; defining a hole pattern including a plurality of holes in the PR/BARC layer using photolithography; transferring the hole pattern, as defined in the PR/BARC layer, from the PR/BARC layer into the carbon layer; filling the plurality of holes in the hole pattern, as defined in the PR/BARC layer and the carbon layer, with oxide to create oxide pillars; using a planarization technique to remove the hard mask layer, a remaining portion of the PR/BARC layer and the stop layer; stripping the carbon layer to expose the oxide pillars; and filling space between the oxide pillars with a hard mask material including metal.