Patent ID: 6627358
Filing Date: 2003-09-30
Classification: B82Y,G03F

Abstract:
A method of repairing lithographic images, comprising:providing a defective mask having opaque pattern elements, wherein said defective mask has defects external to said opaque pattern elements, wherein said defects are not repaired and will produce underexposed regions in a layer of resist exposed using said defective mask; exposing a layer of resist using said defective mask, a first radiation source, and a first exposure dose, thereby forming a latent image in said layer of resist and whereby said defects in said defective mask produce underexposed regions in said latent image in said layer of resist; exposing said underexposed regions in said latent image in said layer of resist using a second radiation source and a second exposure dose; and developing said layer of resist after exposing said underexposed regions in said latent image in said layer of resist.