A method of manufacturing color filter comprising the steps of forming a
metal layer and a photoresistor layer on a substrate; defining a dent over
the photoresistor layer and removing the metal layer below the dent;
depositing an optical filter material over the resulting structure at
relative high temperature, lift off the photoresistor layer by etching the
metal layer. The optical filter material can be fabricated at higher
temperature (300-400.degree. C.) than conventional cold process, the
extinction ratio of the filter made by the optical filter material can be
as high as 90% to enhance the performance of the projector system.
