Patent ID: 7255805
Filing Date: 2007-08-14
Classification: B82Y,G02B,G03F

Abstract:
1. A method for making a photonic structure, the method comprising the steps of: a) providing a substrate; b) depositing at least one planar layer to form a stack having a top surface and a stack thickness, each planar layer of the stack comprising two or more sublayers having different sublayer refractive indices; c) depositing a hard mask material upon the top surface of the stack; d) depositing an imprintable material over the hard mask material; e) patterning the imprintable material by imprinting a regular array of depressions; f) directionally etching at the depressions a regular array of openings through the hard mask material and the stack; g) isotropically etching a portion of a selected material from the sublayers of the stack, while leaving a portion of the selected material un-etched to support the stack; and h) repeating a subset of steps b) through f) until a desired total thickness is reached.