Patent ID: 6335129
Filing Date: 2002-01-01
Classification: G03F,H01J

Abstract:
A method for repairing a pattern defect comprising:(a) determining the irradiation area for an ion beam directed towards a defect pattern film material formed on a mask substrate, the defect pattern film material being an opaque material different from a transparent material of the mask substrate, by narrowing the irradiation area by a predetermined distance inwardly from the edge of the defect pattern film material; (b) focusing the ion beam onto its irradiation area to remove a part of the defect pattern film material from its surface so as to leave a thin layer of the defect pattern film material on the mask substrate, configured such that the ion beam does not attack a surface of the mask substrate; and (c) removing only the thin layer by using a laser beam so as not to ablate a normal pattern film material neighboring the defect pattern film material, the normal pattern film material being made of the opaque material.