Patent ID: 7732109
Filing Date: 2010-06-08
Classification: G03F

Abstract:
1. A method for improving substrate critical dimension uniformity, the method comprising: exposing a plurality of mask patterns on a first plurality of substrates at predetermined locations with common split conditions of focus ({F measuring a critical dimension of the plurality of mask patterns at each of the predetermined locations for each of the plurality of perturbed wafers; averaging the critical dimension measured at each of the predetermined locations over the plurality of perturbed wafers to form a perturbed critical dimension map; measuring a sidewall angle of the plurality of mask patterns at each of the predetermined locations for each of the plurality of perturbed wafers; averaging the sidewall angle measured at each of the predetermined locations over the plurality of perturbed wafers to form a perturbed sidewall angle map; and providing the perturbed critical dimension map and the perturbed sidewall angle map to an exposure tool.