What is the development of vacuum coating technology for vacuum coating equipment?
What is the concept of film uniformity in vacuum coating equipment, the following content to help you better use learning.
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1. The uniformity in thickness can also be understood as the roughness. On the scale of the optical film, the uniformity of the vacuum coating is already quite good, and the roughness can be easily controlled within 1/10 of the visible wavelength, that is, It is said that there is no obstacle to vacuum coating for the optical properties of the film. However, if it refers to the uniformity on the atomic layer scale, that is to say to achieve surface flattening of 10A or even 1A, the specific control factors will be explained in detail according to different coatings.
2. Uniformity in chemical composition: That is to say, in the film, the atomic composition of the compound is easily produced due to the small size, and the SiTiO3 film, if the coating process is not scientific, the actual surface components are It is not SiTiO3, but may be other ratios. The plated film is not the chemical composition of the desired film, which is also the technical content of vacuum coating. Specific factors are also given below.
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3. Uniformity of lattice order: This determines that the film is single crystal, polycrystalline, amorphous, which is a hot issue in vacuum coating technology, see below.
There are two major categories of main classifications: evaporative deposition coatings and sputter deposition coatings, specifically including many types, including vacuum ion evaporation, magnetron sputtering, MBE molecular beam epitaxy, sol-gel methods, and the like.
First, for evaporation coating:
It is common to heat the target to cause the surface components to evaporate in the form of radicals or ions.
Thickness uniformity mainly depends on:
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1. The degree of lattice matching between the substrate material and the target
2, substrate surface temperature
3. Evaporation power, rate
4. Vacuum degree
5. Coating time and thickness.
What is the development of vacuum coating technology?
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What is the development of vacuum coating technology? As we all know, vacuum coating technology is a new material synthesis and processing technology, and is an important part of the surface engineering technology field.
The vacuum coating technology mainly uses physical and chemical means to coat the solid surface with a special performance coating, so that the solid surface has wear resistance, high temperature resistance, corrosion resistance, oxidation resistance, radiation resistance, electrical conductivity, magnetic permeability, insulation and Many advantages such as decoration are superior to the solid materials themselves.
Vacuum coating technology can improve product quality, extend product life, save energy and achieve significant technical and economic benefits.
Vacuum coating technology is known as one of the most promising technologies and has shown an attractive market prospect in the development of high-tech industrialization.