Evaluation of Scratch Durability of Moth-eye Structures Made of High Hardness Ultraviolet Curable Resin

Abstract

Displays such as smartphones and personal computers suffer from deterioration in contrast due to reflection from fluorescent lamps and sunlight, and deterioration in visibility from scratches and fingerprints. There is a need for high-performance antireflection films. To realize such an antireflection film, we focused on the moth eye structure. In this study, an Anti-reflection structure (ARS) film was fabricated with ultraviolet nanoimprint lithography using the newly developed UV curable resin. The ARS film was subjected to scratch testing using steel wool. The change in shape, optical properties and antifouling properties were evaluated. The reflectance of the ARS film was about 0.4%, and the transmittance was over 90%. Contact angle measurements were used to evaluate the antifouling properties of the ARS film. The contact angle and sliding angle were >150° and 12° after the 30th scratch test, respectively.

Anti-fouling and optical characterization of micro-lens array with antireflection structure by UV-NIL

“…The first prepared resin was used in the previous study and the second was a newly developed resin that exhibits antifouling behavior and increased hardness. 26,27) 2.2. Evaluation of the fabricated lens sample Four types of lens samples were fabricated, namely a microlens array using the previous resin, a micro-lens array with ARS using the previous resin, a micro-lens array using the newly developed resin, and micro-lens array with ARS using the newly developed resin.…”