Patent ID: 7615179

Claim:
A method of fabricating T-bar column structures comprising the steps of: a) providing a first silicon mold comprising a silane-treated surface of low energy with lithographically-generated trenches; b) spin-coating a polymer comprising a glass transition temperature T g onto the silane-treated surface of the first silicon mold to form a polymer film which is structured on a first side in contact with the first silicon mold; c) providing a second silicon mold comprising a silane-treated surface of medium energy with lithographically-generated trenches that are wider than the trenches of the first silicon mold; d) pressing the silane-treated surface of the second silicon mold into the surface of the polymer film residing in the first silicon mold, at a temperature above T g , to imprint the second side of the polymer film and yield a series of polymer T-bar structures within the molds; e) separating the first silicon mold from the series of polymer T-bar structures at a temperature below T g to yield a series of polymer T-bar structures attached to the second silicon mold; f) pressing the series of polymer T-bar structures onto a substrate at a temperature below T g and removing the second mold from the substrate after cooling to near room temperature to yield a series of polymer T-bar structures on the substrate, wherein the structures are connected to each other by a residue film; and g) removing the residue film from the series of polymer T-bar structures to yield discrete polymer T-bar structures supported on the substrate.