Patent ID: 7745100
Filing Date: 2010-06-29
Classification: B81B,B81C,C08J,C08K,G03F,Y10T

Abstract:
1. A method for fabricating a structure, comprising: disposing a photodefinable polymer onto a surface, wherein the photodefinable polymer includes a sacrificial polymer and a photoinitiator selected from a negative tone photoinitiator and a positive tone photoinitiator; providing a gray scale photomask, wherein the gray scale photomask encodes optical density profiles defining three-dimensional structures having areas with non-rectangular cross-sections; exposing the photodefinable polymer through the gray scale photomask to optical energy; and removing portions of the photodefinable polymer to form the three-dimensional structures having areas with non-rectangular cross-sections; disposing an overcoat layer onto the three-dimensional structures having areas with non-rectangular cross-sections; and decomposing the photodefinable polymer, thermally, to form three-dimensional air-regions having non-rectangular cross-sections.