Patent ID: 6090507
Filing Date: 2000-07-18
Classification: B23K,G03F

Abstract:
A method of repairing a mask having a minimum line width, the method comprising the steps of:(a) providing a transparent substrate comprising a surface having a first region and a second region, a light absorbing first material covering said first region to provide a line, said line having an edge said edge, having an edge placement tolerance of 10% of the minimum line width or less, said second region having a transmittance having a transmittance tolerance of 5% or less;(b) inspecting the mask and detecting a defect, said defect in a defect region, said defect including said edge;(c) repairing said defect, wherein all said second region in said defect region and adjacent said defect region has a transmittance within said transmittance tolerance and wherein said edge in said defect region and adjacent said defect region is within said edge placement tolerance.