Method of enhancing the contrast of images and materials therefor
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United States of America Patent
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Oct 27, 1987
Issued Date -
N/A
app pub date -
May 17, 1985
filing date -
Sep 28, 1983
priority date (Note) -
Expired
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Abstract
The image of an object with opaque and transparent regions having a contrast lens than the contrast threshold of a layer of photoresist when light of a predetermined wavelength to which the photoresist is sensitive is passed through the object and onto the layer of photoresist is enhanced in contrast by the provision of a contrast enhancing layer contiguous to the surface of the photoresist to a value above the contrast threshold of the photoresist. The contrast enhancing layer is constituted of an aryl nitrone compound mixed with a suitable binder.
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