Patent ID: 9213239
Filing Date: 2015-12-15
Classification: G03F,H01L

Abstract:
1. A method of forming a pattern in a semiconductor device structure, the method comprising: forming a first photosensitive resist material over a substrate; exposing the first photosensitive resist material to radiation through a mask; developing the first photosensitive resist material to form trenches in the first photosensitive resist material and expose the substrate between adjacent portions of the first photosensitive resist material; filling the trenches between the adjacent portions of the first photosensitive resist material with a chemically active species to form a chemically modified outer portion of each of the adjacent portions of the first photosensitive resist material while an inner portion of each of the adjacent portions of the first photosensitive resist material remains chemically unmodified; forming a second photosensitive resist material over the chemically modified outer portion of each of the adjacent portions of the first photosensitive resist material; exposing portions of the second photosensitive resist material to another radiation; exposing the inner portion of at least some of the adjacent portions of the first photosensitive resist material to the another radiation through the second photosensitive resist material and the chemically modified outer portion; and removing the chemically modified outer portion of each of the adjacent portions of the first photosensitive resist material, the exposed inner portion of each of the adjacent portions of the first photosensitive resist material, and the exposed portions of the second photosensitive resist material to form a pattern in the first photosensitive resist material and the second photosensitive resist material.