Coating method of dielectric film with variable refractive index and color film containing dielectric film

Abstract

The invention discloses a coating method of a dielectric film with a variable refractive index and a color film containing the dielectric film. The coating method comprises the following steps that asubstrate to be coated with the film is provided; and a vacuum coating method is adopted, a silicon target is used as a target material, nitrogen and oxygen are used as reaction gas, then the dielectric film is deposited on the substrate, and the change of the refractive index of the dielectric film is controlled by adjusting the flow ratio of the nitrogen to the oxygen. According to the coating method, compared with a traditional dielectric film with a fixed unchanged refractive index, the vacuum coating method is adopted, the silicon target is used as the target material, the nitrogen and the oxygen are used as the reaction gas, then the dielectric film is deposited on the substrate, the change of the refractive index of the dielectric film is controlled by adjusting the flow ratio of the nitrogen to the oxygen, the preparation of a plurality of color films can be realized according to requirements, and different colors are presented, so that the preparation of the color films has more flexibility and variability; and the coating process is stable and simple, the equipment configuration requirement is low, so that the equipment investment is decreased, and the coating cost is saved.

Description

technical field [0001] The invention relates to the field of coating technology, in particular to a coating method of a dielectric film with a variable refractive index and a color film containing the dielectric film. Background technique [0002] With the improvement of people's living standards, electronic products such as mobile phones have become indispensable daily necessities for people. With continuous improvement, more and more users hope that the products they use are special and distinctive products. It can be seen that these users are dissatisfied with the appearance of electronic products at the current stage and they are innovative and changed in the appearance of electronic products Definitely a lot to look forward to. Facing the increasingly high requirements of consumers, while many manufacturers are constantly seeking technological innovation and functional innovation to cater to the development trend of environment, energy saving and differentiation, in or...

AI Technical Summary

Problems solved by technology

Existing color films are usually stacked layers of alternately arranged first dielectric films and second dielectric films, wherein the refractive index of the first dielectric film is higher than that of the second dielectric film, and the first dielectric film Silicon nitride film is usually used, and silicon oxide film is usually used as the second dielectric film. Since the refractive index of the first dielectric film and the second dielectric film are fixed, the color change of the color film is not rich enough.