Patent ID: 6246523
Filing Date: 2001-06-12
Classification: C01P,C09C,C09D,G02B,Y10S,Y10T

Abstract:
A method of fabricating a color shifting multilayer interference film, comprising the steps of:providing a web material with a release layer formed on an upper surface thereof;forming a first absorber layer on the release layer;forming a first dielectric layer on the first absorber layer;forming a reflector layer on the first dielectric layer;forming a second dielectric layer on the reflector layer;forming a second absorber layer on the second dielectric layer to produce the interference film; andremoving the interference film from the web material;wherein the first and second dielectric layers have an index of refraction of greater than 1.65 and an optical thickness at a design wavelength that provides a discrete color shift such that the film has a first color at a first angle of incident light or viewing and a second color different from the first color at a second angle of incident light or viewing.