Patent ID: 6297071
Filing Date: 2001-10-02
Classification: H01L

Abstract:
A method of making a solid state image sensor having a color filter array with color filter elements having a plurality of different types of colored pixels embedded in a planar surface, the method comprising the steps of:(a) providing a semiconductor substrate having spaced image pixels with a first transparent layer covering the pixels;(b) making the first transparent layer optically planar by chemical mechanical polishing;(c) uniformly depositing a second transparent etch-stop layer over the first transparent layer;(d) uniformly depositing a third support layer over the second transparent etch-stop layer which is made of a different material than the second transparent etch-stop layer;(e) etching openings into the third support layer in regions where all color filter elements are desired to be formed; and(f) sequentially filling each opening with one of two or more colorants to form the color filter array.