Patent ID: 6218057
Filing Date: 2001-04-17
Classification: G03F

Abstract:
A lithographic process for fabricating an article comprising:directing radiation of a certain wavelength onto a mask having a first pattern therein;projecting an image of the first pattern into a layer of energy sensitive material formed on a substrate;developing the image to form the first pattern in the energy sensitive material;forming a layer of energy sensitive resist material over the first pattern;directing radiation of a certain wavelength onto a mask having a second pattern therein wherein the wavelength is either the same or different than the wavelength of the radiation directed onto the mask having the first pattern;projecting an image of the second pattern into the layer of energy sensitive resist material wherein the image is aligned with the underlying first pattern so that the first pattern and the second pattern cooperate to define a desired pattern;developing the image to form the second pattern in the energy sensitive material; anddeveloping the desired pattern from the first and second pattern, wherein the desired pattern has a dimension that is smaller than at least one of the wavelengths of radiation.