Fabrication of lateral and stacked color patterns through selective wettability for display applications

Abstract A simple and versatile method of fabricating color patterns in two‐dimension (2D) and three‐dimension (3D) was developed using the selective‐wettability approach. Red, green, and blue color elements are sequentially formed on a single substrate in a pattern‐by‐pattern and/or pattern‐on‐pattern fashion, through a simple coating process. Either 2D or 3D structures in an array format are produced by controlling the thickness of the hydrophobic layer (HL) coating a substrate within the framework of wetting transition. Moreover, it was demonstrated that the stacked geometry of two successive patterns can be easily tailored for various types of color arrays, with the pattern fidelity of a few tens of nanometers in terms of only a parameter of the HL thickness.