Patent ID: 9050621
Filing Date: 2015-06-09
Classification: B05D,B82Y,G03F,Y10S

Abstract:
1. A method for fabricating a nanopillared substrate surface, the method comprising: applying a polymer solution to a substrate surface of a substrate, the polymer solution containing: evaporating the application solvent to cause the amphiphilic block copolymer and the hydrophilic homopolymer in the polymer solution to self-assemble on the substrate surface to form a self-assembled polymer layer having hydrophobic domains of the hydrophobic blocks adjacent to the substrate surface, hydrophilic domains of the hydrophilic homopolymer extending into the self-assembled polymer layer from an exposed surface of the self-assembled polymer layer opposite the substrate surface, and a transitional region of the hydrophilic blocks of the amphiphilic block copolymer between the hydrophobic domains and the hydrophilic domains; selectively removing at least a portion of the hydrophilic domains to form a plurality of pores in the exposed surface of the self-assembled polymer layer, wherein the plurality of pores do not span from the exposed surface to the substrate surface; depositing a protective layer on the exposed surface after at least the portion of the hydrophilic domains is removed from the self-assembled polymer layer; etching through the plurality of pores after the protective layer is deposited to form through-holes from the plurality of pores, the through-holes being defined through the self-assembled polymer layer from the exposed surface to the substrate surface; depositing a nanopillar-forming material onto the substrate surface through the through-holes; and removing the self-assembled polymer layer to expose a nanopillared substrate surface having a plurality of nanopillars thereon.