This technology proposes the preparation of Anodic Aluminum Oxide (AAO) templates on the surface of aluminum. The structural color of AAO is combined with lithography process to form patterns on the substrate, which can achieve high resolution on various aluminum substrate for decoration. Also, rewritable board and invisible anti-counterfeiting technology are proposed for innovative applications by the low-cost, high-efficiency, and high-saturation AAO structural color and patterning.
The traditional research of AAO structure color with some shortcomings such as blur, uneven color and colorfulness. We propose a new process to combine the lithography and anodization to achieve precise patterns with different structure colors. We can not only obtain high-resolution and complex patterns suitable for logo trademark production, but also solve the colorfulness problem by nano-structure modulate. Furthermore, rewritable board and invisible anti-counterfeiting technology are proposed for innovative applications, which improve the applicability of AAO structure color and patterning.
AAO has been used in industrial surface coloration for bike, phone/notbook housing and household aluminum appliance but the related methods are all performed with monochromatic dyes. We propose the AAO structural color combined with lithography can perform high-resolution patterning for more than two colors with high stability to be further used for more complex surface decoration requirements. In addition, the rewritable board and anti-counterfeiting technology without dust, organic vapor and environment contamination problems provide more possibility for future application in our living.

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