Method for manufacturing an optical filter

Details Method for manufacturing an optical filter Method for manufacturing an optical filter

G - Physics

02

B

88/121, 26/197

G02B 5/22 (2006.01) G03F 9/00 (2006.01)

Patent

CA 1312760

7317 ABSTRACT OF THE DISCLOSURE A color filter is formed on a support, such as a charge coupled device, by (a) forming a layer on a support with a composition comprising a positive photoresist and a dye; said dye being soluble in the solvent of said photoresist; (b) exposing predetermined portions of said layer to radiation adapted to increase the solubility of said coating in the exposed areas; (c) developing said exposed areas to form a pattern of filter elements; and (d) repeating said steps with a different color dye in said composition; wherein said dye constitutes in excess of 10% by weight, dry basis of said composition, is substantially non-absorptive in the exposure wavelength of said composition, and provides predetermined absorptive characteristics for the specified filter element and said dye possessing substantially the same polarity as said composition.

579716

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