Method of making color filter arrays

Claim 1

In a method of making a color filter array for a device such as an image sensor or the like comprising the steps of: (a) forming only one transparent imagable mordant layer on the device; (b) exposing the imagable mordant to a pattern representing an array of filter elements and developing areas of the mordant to provide filter elements separated by the separation region; (c) coating a layer of positive photoresist over the filter element array; (d) exposing and developing the photoresist layer to obtain first window areas in the photoresist corresponding to selected filter elements; (e) providing a first dye through the first window areas to dye selected filter elements with a first color; and (f) exposing and developing the photoresist layer to obtain second window areas in the photoresist corresponding to other selected filter elements; (g) providing a second dye through the second window areas to dye other selected filter elements with a second color; (h) repeating steps (f)-(g) over as many times as desired; and (i) removing the remaining portions of the photoresist layer.