TAPERED EDGE BEAD REMOVAL PROCESS FOR IMMERSION LITHOGRAPHY

A method and apparatus for forming a tapered photoresist edge. The method includes: forming a photoresist layer on a substrate; exposing a first annular region of the photoresist layer adjacent to a perimeter of the substrate to actinic radiation, the first annular region having a first outer perime...

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creator BRODSKY COLIN J
description A method and apparatus for forming a tapered photoresist edge. The method includes: forming a photoresist layer on a substrate; exposing a first annular region of the photoresist layer adjacent to a perimeter of the substrate to actinic radiation, the first annular region having a first outer perimeter proximate to a perimeter of the substrate and a first inner perimeter away from the perimeter of the substrate, the actinic radiation gradually decreasing in intensity from the first outer perimeter to the first inner perimeter; and developing the exposed first annular region of the photoresist layer to form a tapered profile in a second annular region of the photoresist layer, the second annular region having a second perimeter proximate to the perimeter of the substrate and a second inner perimeter away from the substrate perimeter, the profile gradually increasing in thickness from the second outer perimeter to the second inner perimeter.
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subjects ACCESSORIES THEREFOR
APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM
APPARATUS SPECIALLY ADAPTED THEREFOR
CINEMATOGRAPHY
ELECTROGRAPHY
HOLOGRAPHY
MATERIALS THEREFOR
ORIGINALS THEREFOR
PHOTOGRAPHY
PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES
PHYSICS
title TAPERED EDGE BEAD REMOVAL PROCESS FOR IMMERSION LITHOGRAPHY
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