Patent ID: 9728406
Date: 2017-08-08
CPC Classifications: H01L

Claim:
1. A method for patterning, comprising: placing a substrate into a processing chamber; depositing a gap fill on the substrate in each of a plurality of gaps, wherein each gap is between adjacent protrusions formed on the substrate, wherein each protrusion includes a first line having a first line width, a second line having a second line width, and a third line having a third line width, wherein the gap fill has a fourth line width, wherein the second line is sandwiched between the first and third lines, wherein the gap fill comprises a first material, the first and third lines each comprises a second material, and the second line comprises a third material, and wherein the gap fill is between the third line of one protrusion and the first line of an adjacent protrusion; depositing a photoresist on the gap fill, first line, second line and third line; and forming an opening in the photoresist, wherein the opening has an edge displacement error of one and half times the first linewidth.