Patent ID: 6040119
Filing Date: 2000-03-21
Classification: G03F

Abstract:
A process for photolithography, comprising:providing an optical mask;coating a substrate with a layer of photoresist, said photoresist having been supplied by a manufacturer together with recommended ranges for processing;drying the layer of photoresist;using actinic radiation having a partial coherence value between 0.6 and 0.9, and projecting an image of the mask on the layer of photoresist by means of an imaging system having a numerical aperture between 0.5 and 0.7, for a first time period;and then baking the substrate and photoresist, at a temperature that is between 20 and 25.degree. C. lower than the ranges recommended by the manufacturer, for a second time period; andthen developing said layer of photoresist whereby an image that is free of proximity effects, and having a critical dimension, is produced.