Patent ID: 7816071

Claim:
A process for imaging a photoresist comprising the steps of, a) forming a stack of multiple layers of organic antireflective coatings on a substrate comprising coating the layers, and curing and insolubilizing each of the layers of the multiple layers by heating, where each of the organic antireflective coatings independently comprises a polymer comprising an absorbing chromophore; b) forming a coating of a photoresist over an upper layer of the stack of multiple layers of organic antireflective coatings; c) imagewise exposing the photoresist with an exposure equipment; and, d) developing the coating with a developer; wherein a refractive index of the upper layer of the multiple layers of organic antireflective coatings has a refractive index which is equal to or greater than a refractive index of the photoresist layer and where the refractive indices of the upper layer and the photoresist range from about 1.65 to about 1.75.