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Highly reflective nano-film and its preparation method and application

A nano-film, high-reflection technology, used in branch equipment, sputtering, instruments, etc., can solve the problems of easy electrical conductivity, weak adhesion, and color influence of metal-plated materials, and achieve good film adhesion and yield. High and efficient effect

Active Publication Date: 2022-05-17
LENS TECH CHANGSHA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The appearance effect and scratch resistance formed on the surface of ceramics, glass or gemstones by traditional silk screen printing or metal coating technology can no longer meet the reliability requirements, and there is a problem of high reflection and dazzling colors, which seriously affects the appearance and aesthetic effect. Therefore, it has strong scratch resistance, high adhesion, and high reflection nano-film preparation technology has great application value
[0003] At present, it is difficult to achieve high reflective and colorful effects on the surface of non-metallic materials. In order to achieve high reflective and colorful effects, the existing technology uses high refractive index and low refractive index materials to superimpose, and uses the principle of light interference effect to achieve high reflective effects. , such as patent CN111747658A discloses a kind of colorful color-changing coated glass, including glass substrate, outer high refractive index Nb 2 o 5 Coating layer, from the glass substrate to the outer layer of high refractive index Nb 2 o 5 The direction of the film layer is alternately arranged with multiple inner layers of high refractive index Nb 2 o 5 Film layer, inner layer low refractive index SiO 2 The total thickness of the film layer is 1500nm. The superimposed high-reflection colorful film (thickness needs to be 1500nm to achieve high-reflection effect), but the film layer is too thick, resulting in weak adhesion, which will lead to performance such as boiling hundreds of grids. can not meet the requirements
[0004] In addition, in the prior art, a metal layer is directly plated on the surface of the film layer, but the metal plated material is easy to conduct electricity, which seriously interferes with the signals of mobile phones and other equipment and has color effects

Method used

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  • Highly reflective nano-film and its preparation method and application
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Examples

Experimental program
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preparation example Construction

[0061] The present invention also provides a preparation method of a highly reflective nano film, comprising the following steps:

[0062] Deposit transition layer, first high-refractive index layer, first low-refractive-index layer, second high-refractive-index layer, second low-refractive-index layer, metal layer and third low-refractive-index layer sequentially on substrate to obtain high reflection nano film.

[0063] The coating method is not limited, and may be vapor deposition, magnetron sputtering, and the like.

[0064] Specifically, the preparation method of a typical highly reflective nano film comprises the following steps:

[0065] 1. Use an ultrasonic cleaner to clean ceramic, glass or gem (3D, 2.5D, flat sheet) substrates, use a protective film to paste and fix the front, and the back is the area to be coated;

[0066] 2. Put the tested substrate into the umbrella of the evaporator cavity and fix it with a magnet, close the door of the machine to pump air and ...

Embodiment 1

[0076] In this example, a 3D product of 152.22±0.08×73.94±0.08*0.6±0.02mm glass sheet is produced, and the preparation process of the highly reflective nano-film made of aluminum material is carried out according to the following specific process steps:

[0077] 1. Prepare high-gloss polished glass products. After cleaning with a fully automatic twelve-slot ultrasonic cleaning machine, paste the board and prepare for coating;

[0078] 2. Paste and fix the front side of the glass substrate with a protective film, and the back side is the area to be coated. The sprayed ink is black ink. After spraying, the ink meets the requirements of the resistance test;

[0079] 3. Put the pasted product into the umbrella of Guangchi 2350 evaporation coating machine and fix it with a magnet. The coating steps are as follows:

[0080] 3.1 Put the coating material silicon dioxide / titanium dioxide etc. into the crucible, close the door and vacuumize;

[0081] 3.2 Vacuum to 3.0×10 -3 After Pa, ...

Embodiment 2

[0104] The difference between embodiment 2 and embodiment 1 is that the thickness of each film layer is different: the first layer of silicon dioxide (SiO 2 ,15nm), the second layer of titanium dioxide (TiO 2 ,10nm), the third layer of silicon dioxide (SiO 2 ,75nm), the fourth layer of titanium dioxide (TiO 2 ,60nm), the fifth layer of silicon dioxide (SiO 2 ,60nm), the sixth layer of aluminum (Al,75nm), the seventh layer of silicon dioxide (SiO 2 ,40nm), the measured reflectance is 95.2%, and the color is light blue.

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Abstract

The invention provides a high-reflection nano film and its preparation method and application, and relates to the field of film coating technology. a high refractive index layer, a first low refractive index layer with a thickness of 65-80nm, a second high refractive index layer with a thickness of 50-65nm, a second low refractive index layer with a thickness of 10-90nm, a metal layer with a thickness of 25-90nm and The third low-refractive-index layer with a thickness of 25-70nm; the ratio of the thickness sum of the second low-refractive-index layer and the third low-refractive-index layer to the thickness of the metal layer is 1: (1-3); Film thickness ≤ 440nm. The present invention can achieve a reflection effect of ≥95% under relatively thick film thickness, and the coating layer meets the reliability requirements and meets the customer's personalized requirements for the appearance and visual effects of ceramics, glass or precious stones.

Description

technical field [0001] The invention relates to the technical field of coating, in particular to a high-reflection nanometer film and its preparation method and application. Background technique [0002] With the popularization of smart phones, consumers have higher and higher requirements for the appearance of mobile phones. At present, the back cover of non-metallic mobile phones has become one of the design directions pursued by most consumer electronics manufacturers in the middle and high-end models. The increase of high reflection Bright color film is currently the most mainstream design solution. In the next few years, the back cover of smartphones will gradually change from metal to non-metallic materials mainly represented by ceramics, glass, and gemstones. The appearance effect and scratch resistance formed on the surface of ceramics, glass or gemstones by traditional silk screen printing or metal coating technology can no longer meet the reliability requirements, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/06C23C14/08C23C14/10C23C14/18C23C14/24C23C14/35G02B1/10G02B5/08G02B5/28H04M1/02
CPCC23C14/10C23C14/08C23C14/18C23C14/185C23C14/083C23C14/0694C23C14/24C23C14/35G02B1/10G02B5/0808G02B5/285H04M1/0283Y02E10/50
Inventor 于海亮朱斌陈小群
Owner LENS TECH CHANGSHA