Patent ID: 9132445
Filing Date: 2015-09-15
Classification: B05D,B82Y,C23C,G01N,Y10T

Abstract:
1. A method for producing a highly ordered array of nanoholes in metallic films on a substrate, comprising the steps: a) providing microspheres comprising poly-N-isopropylamide (polyNIPAM), the microspheres being selected from pure poly-N-isopropylamide (polyNIPAM) hydrogel microspheres, and polymeric or inorganic beads carrying poly-N-isopropyl-amide (polyNIPAM) hydrogel chains, b) spin coating an aqueous dispersion of said microspheres onto a substrate and drying the dispersion, which results in a non-close packed ordered array of the microspheres, wherein the spin coating comprises at least two different spinning operations with different speeds, and a lower alkyl alcohol is added to the aqueous dispersion before the spin coating step, c) generating a metallic film on the substrate, d) removing the microspheres from the surface of the substrate which results in an ordered array of nanoholes on the substrate, and e) optionally increasing the thickness of the metallic film by selective electroless plating.