Patent ID: 9085019
Filing Date: 2015-07-21
Classification: B08B,B29C,B29K,B29L,B32B,B81C,B82Y,C23F,Y10T

Abstract:
1. A superhydrophobic film comprising: a first major surface; a second major surface opposite the first major surface, the second major surface comprising a plurality of prismatic microstructures each comprising a triangular cross-section in a plane transverse to the second major surface; and a plurality of nanoposts formed protruding from the surface of the plurality of microstructures, wherein the nanoposts each extend between a base and a peak along a longitudinal structure axis thereof, the base being embedded in the surface of the plurality of microstructures, the nanoposts each have an average length-to-base ratio of at least 5 to 1, and the plurality of nanoposts comprises a material having a slower etching rate than a material of the surface of the plurality of microstructures; wherein the superhydrophobic film has a water contact angle of over 150 degrees and a sliding angle of less than 3 degrees.