Patent ID: 6042995
Filing Date: 2000-03-28
Classification: B82Y,G03F

Abstract:
A process for device fabrication comprising:transmitting radiation in a wavelength range of about five nm to about 50 nm onto a previously inspected mask that comprises a mask substrate on which is formed a multilayer film that substantially reflects radiation in the wavelength range over which is a patterned film of a material that substantially absorbs radiation in the wavelength range, wherein the mask substantially reflects the radiation in a desired pattern; andprojecting the patterned radiation onto a substrate coated with a layer of energy sensitive material wherein the mask has been previously inspected by:interposing an inspection layer, wherein the inspection layer is a layer of an energy sensitive material, between the mask substrate with the multilayer film formed thereon and a source for radiation having a wavelength of about five nm to about 50 nm;directing the radiation onto the inspection layer;transmitting at least a portion of the radiation through the inspection layer and onto the mask substrate with the multilayer film thereon, wherein at least a portion of the radiation is reflected back into the inspection layer wherein the inspection layer is positioned in such a way that mask blank information is recorded in the inspection layer;developing the image; andinspecting the developed inspection layer.