Patent ID: 7547398
Filing Date: 2009-06-16
Classification: B82Y,G02B,G03F

Abstract:
1. A method of processing a substrate to fabricate a microlens imprint template comprising: overlaying the substrate with a mask having a plurality of through apertures; applying a resist to a first portion of the apertures leaving a second portion of the apertures unmasked; performing an anisotropic dry etch of the substrate through the second portion of unmasked apertures thereby forming first features in the substrate; removing the resist on the first portion of the apertures and applying a resist over the first features; performing a first isotropic wet etch of the substrate through the first portion of the apertures in the mask thereby forming second features as microlens hemispheres in the substrate; removing the mask from over the second features; and, performing a second isotropic etch to the second features to change an aspect ratio of the microlens hemispheres.