Patent ID: 7432026

Claim:
A method of manufacturing a dichroic filter array, comprising: forming a first dichroic filter material layer on a substrate; forming a hardmask layer and a patterned photoresist layer on the first dichroic filter material layer; removing a portion of the first dichroic filter material layer exposed by the patterned photoresist layer so as to form a plurality of first dichroic filter units; forming a second dichroic filter material layer on the substrate and the patterned photoresist layer; removing the patterned photoresist layer and a portion of the second dichroic filter material layer located on the patterned photoresist layer, and transforming the rest portion of the second dichroic filter material layer between the first dichroic filter units into a plurality of second dichroic filter units, wherein the first dichroic filter units and the second dichroic filter units together form a dichroic filter array; and removing the hardmask layer on the first dichroic filter units after the patterned photoresist layer is removed.