A method of producing a color filter to be used in conjunction with a display element such as an active or passive matrix liquid crystal panel. The color filter is formed by a stack of exposed and developed film layers, and each layer corresponds to a color of the resulting filter. The stack...http://www.google.ca/patents/US5673093?utm_source=gb-gplus-sharePatent US5673093 - Method for manufacturing laminated color filters for liquid crystal displays 
