Industrial‐Grade Structural Coloration with Robust and Vivid TiON‐Based Structures

Abstract A durable, high‐performance structural coloration approach is presented using TiON‐based Fabry‐Perot (F‐P) cavities. Conventional metal‐insulator‐metal structures suffer from oxidation and mechanical degradation, limiting their industrial viability. Here, the top metal layer is replaced with TiON, a lossy dielectric known for its corrosion resistance and high hardness. Fabricated TiON/Si 3 N 4 /metal structures achieve vivid, tunable colors across a broad spectrum while maintaining high stability. Their optical, mechanical, and environmental robustness is systematically evaluated through five‐year aging, humidity, and abrasion tests. Reflectance spectra confirm stable near‐perfect light absorption (>90%) with minimal color shifts (≈10 nm). Camera imaging, CIE chromaticity analysis, and SEM investigation validate long‐term color retention and stable surface morphology. The findings demonstrate that TiON‐based F‐P cavities offer a promising solution for industrial applications, overcoming key limitations of conventional structural color materials.