Formulation

Abstract

The present invention relates to a method for fabricating an optical waveguide comprising following steps (A) to (D), (A) Selecting metal oxide precursor materials, or mixtures of metal oxide precursor materials, such that even when multiple cured films are produced separately, and exhibit differing refractive index (RI) values at 530 nm within the range of 1.7 to 2.3, preferably 1.8 to 2.2, the ratio of the refractive index at 450 nm (R450) to that at 630 nm (R630) consistently remains between 1.015 and 1.045, preferably between 1.015 and 1.040; (B) preparing a formulation containing the selected metal oxide precursor or the mixture of the metal oxide precursors; (C) providing the formulation obtained in step (B) over a surface of a substrate to form a curable composite, preferably by wet deposition process, more preferably by spin-coating or ink-jetting, even more preferably by ink-jetting; and (D) curing the formulation, preferably by heat, by UV irradiation to obtain a cured composite. Obtained optical waveguides may be used in display device applications, for example a Liquid crystal display (LCD), Light emitting diode display (LED display), organic light emitting display (OLED), micro-LED display, quantum dot display (QLED), AR display, VR display, MR display, plasma (PDP) display, electroluminescent (ELD) display fabricated on a substrate controlled by semiconductors.

Dependencies are inferred from the claim text.