Patent ID: 7005220
Filing Date: 2006-02-28
Classification: G03F,Y10S

Abstract:
1. A method for structuring a lithographic mask comprising the sequential steps of: preparing a mask substrate comprising a radiation-transmissive substrate having a mask layer in at least partial regions, said mask layer being selected from a group consisting of a radiation-impermeable layer, a half-tone layer and a combination of a half-tone layer and a radiation-impermeable layer; applying at least one curable electrically-conductive layer over the mask layer and exposed portions of the radiation-transmissive substrate; curing the curable, electrically-conductive layer so that it becomes essentially insoluble; applying a resist layer on the cured, electrically-conductive layer; electron printing the desired patterns on the resist layer; developing the resist layer to remove partial regions of the resist layer; removing the cured, electrically-conductive layer in those regions that are no longer covered by the resist layer; and structuring exposed portions of the radiation-impermeable substrate and the mask layer which are no longer covered by the resist layer and the cured electrically-conductive layer.