Patent ID: 9417531
Filing Date: 2016-08-16
CPC Classification: G03F,H01J

Claim Text:
1. A method for making a nano-pillar array on a substrate, the method comprising: providing a carbon nanotube composite structure, wherein the carbon nanotube composite structure comprises a plurality of carbon nanotubes crossed with each other and defines a plurality of openings; placing the carbon nanotube composite structure on a first surface of the substrate, wherein parts of the first surface are exposed from the plurality of openings; forming a patterned surface on the substrate by dry etching the first surface using the carbon nanotube composite structure as a first mask, wherein the patterned surface comprises a plurality of strip-shaped bulges crossed with each other; exposing the patterned surface by removing the carbon nanotube composite structure; applying a photoresist layer on the patterned surface; removing the photoresist layer and obtaining some residual photoresist at intersections of the plurality of strip-shaped bulges; and dry etching the substrate using the residual photoresist as a second mask.