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Structure and principle of optical vacuum coating equipment

Release time:

2022-02-21

Daily necessities such as mobile phone screens, mobile phone cases, mobile phone covers, cameras, glasses, filters, and various high-tech products all rely on coating technology, and even more so on vacuum coating equipment. Optical coating technology has become an integral part of people's lives, pioneering the development of high-tech industries and playing a very important role in daily life.

　　Daily necessities such as mobile phone screens, mobile phone cases, mobile phone protective covers, cameras, glasses, filters, and some high-tech products all rely on coating technology, or even more so Vacuum Coating Equipment Optical coating technology has become an integral part of people's lives, pioneering the development of high-tech industries and holding a very important position in life.

　　Optical vacuum coating equipment consists of a vacuum system, an evaporation system, a cooling system, and an electrical system. The vacuum system consists of a vacuum chamber and an exhaust system. The vacuum chamber is the main body of the coating machine, and the coating process is completed in the vacuum chamber. The vacuum chamber is connected to the exhaust system via a connecting valve. To improve film quality and prevent the influence of air molecules on sputtered ions, the optical components and ion source must be placed in a vacuum environment during operation. The exhaust system mainly consists of Roots pumps, mechanical pumps, and vacuum pumps, which are responsible for exhausting the gas in the vacuum chamber to create a vacuum environment in the chamber. The evaporation system mainly refers to the film-forming device. There are many types of film-forming devices for coating machines, such as radio frequency sputtering, magnetron sputtering, electron beam evaporation, resistance heating, and ion plating.

Vacuum Coating Equipment

　　Optical vacuum coating equipment uses vacuum sputtering to coat optical components to change the reflectivity and transmittance of the components to incident light. At the same time, in order to improve imaging quality and reduce reflection loss on the component surface as much as possible, multiple layers of film are often applied. After the optical components are coated, light is repeatedly reflected and transmitted on the surface of the multilayer film, forming multiple-beam interference. By controlling the thickness and refractive index of the film, different intensity distributions can be obtained. Based on this principle, polarizing reflection films, color separation films, cold light films, and interference filters can be manufactured to meet more complex requirements.

　　Advantages of Optical Vacuum Coating Equipment:

　　(1) Low film formation temperature. In the steel industry, the coating temperature of hot-dip galvanizing is generally 400 ~ 500°, and the chemical coating temperature is even higher than 1000°. Such high temperatures can easily lead to deformation and alteration of the plated parts, while the low temperature of vacuum coating can be reduced to room temperature, thus avoiding the shortcomings of traditional coating processes.

　　(2) Large degree of freedom in the selection of evaporation sources. There are many coating materials to choose from, not limited by the melting point of the material. Various metal nitride films, metal oxide films, metal carbide materials, and various composite films can be plated.

　　(3) No harmful gases or liquids are used, and there is no adverse impact on the environment. At present, people pay more and more attention to environmental protection, which is valuable.

　　(4) Good quality of steel strip coating. Uniform, smooth, and thin coatings can be obtained, with high purity, corrosion resistance, and adhesion. Problems such as missed plating points, zinc waves, and zinc flowers in hot-dip galvanizing do not exist.

　　(5) Flexible process and easy variety change. Single-sided, double-sided, single-layer, multi-layer, and mixed-layer electroplating can be performed, and the coating thickness is easy to control.

　　In summary, optical Vacuum Coating Equipment Vacuum coating of steel strip is a high-tech technology integrating metallurgy, vacuum, chemistry, and physics. Its products have high added value, combining the strength and low Price of steel strip with the advantages of multi-functionality, multiple varieties, and high quality after coating. It is a promising research direction for new types of steel strip materials.

Key words:

How to measure the film thickness of a PVD coating machine?

What are the classifications of vacuum coating equipment?

How to measure the film thickness of a PVD coating machine?

What are the classifications of vacuum coating equipment?