Patent ID: 7941013
Filing Date: 2011-05-10
Classification: B29D,G02B

Abstract:
1. A process comprising (a) providing a photoreactive composition, said photoreactive composition comprising (b) imagewise exposing at least a portion of said composition to light sufficient to cause simultaneous absorption of at least two photons, thereby inducing at least one acid- or radical-initiated chemical reaction where said composition is exposed to the light, said imagewise exposing being carried out in a pattern that is effective to define at least the surface of an array of light extraction structures, each said light extraction structure having at least one shape factor, and said array of light extraction structures having a distribution that is uniform or non-uniform; wherein said imagewise exposing is carried out by scanning at least the perimeter of a plurality of planar slices of a desired three-dimensional light extraction structure, while controlling slice thickness so as to achieve a light extraction structure surface roughness of less than the slice thickness.