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[INP-11i] Color Mixture of Interference Color by Niobium Oxide Thin Film Using Photolithography.
An anodic oxidized niobium (Nb) layer on Nb plate makes various colors. A driving force of the coloration is considered to be the thin film interference of the anodic oxidized layer on the Nb plate. However, color development by anodic oxidation is related to the thickness of oxidized Nb layer, it is impossible to place a new color on the colored Nb plate. The focus of this research is to make a checkerboard pattern on the Nb plate by photolithography and juxtaposed additive color mixture. Consequently, we succeeded in mixing two colors colored with creating a new color.