Patent ID: 6569575
Filing Date: 2003-05-27
Classification: G03F

Abstract:
A light coupling structure (20, 40) for use as mask for the exposure of a resist (11) with exposing light (13), comprisingprotruding portions (24, 42, 43, 44) guiding the exposing light (13) towards its end from where the exposing light (13) is coupled directly into the resist (11), the ends having the lateral shape of structures to be exposed in the resist (11), and connecting portions (29) which connect the protruding portions (24, 42, 43, 44) and block the exposing light (13) from exposing the resist (11) in areas other than those exposed through the protruding portions (24, 42, 43, 44), the light coupling structure (20, 40) having a refractive index relief, wherein the exposing light (13) is guidable by internal reflections towards the protruding portions (24, 42, 43, 44).