What Are the Main Areas of Application for PVD Vacuum Coating Technology?

With the development of economy and the improvement of living standard, people like to decorate watch cases, watch straps, clothing, lighting, glasses frames, indoor and outdoor decorative parts, hardware luggage, mobile phone cases, mobile phone video screens sanitary ware, food packaging and other decorative items finely decorated with colorful. Here, Enijor introduces you to the main applications of pvd vacuum coating technology!

1. In tools, moulds and other metal cutting tools

In our life, we will see golden yellow, cobalt copper, black and other seven miscellaneous colours of drills, mirror knives, moulds, etc., these are coated tools after the coating technology processing.

(1) The gold coloured ones are coated with TiN and ZrN, which are the first generation of hard layer materials that are widely used.

(2) The black ones are coated with TiC, CrN on the cutting tools

(3) In cobalt bronze, the tool is coated with TiALN.

2. In architectural glass and automotive glass

Architectural glass has two basic functions: light transmission and heat insulation.

Ordinary glass can transmit most of the energy of large sunlight, which is very beneficial for lighting and absorbing the energy of large sun rays. For the space infrared radiation, although ordinary glass can prevent the indoor heat directly through the outdoor, but the heat is absorbed by the glass of the secondary heat dissipation will also cause great losses. With the development of the economy, ordinary glass is increasingly unable to meet people's requirements, and sunlight control film and low radiation film can make up for the shortcomings of ordinary glass in this regard. Sunlight control film can meet the requirements of low latitude areas to reduce indoor temperature, while low radiation film can meet the requirements of high node areas to fully accept solar radiation energy and prevent the outflow of heat from the room to a greater extent.

On glass, coating with a layer of TiO2 turns it into anti-fog, anti-dew and self-cleaning glass, a process that has excellent applications in automotive glass.

3. In Flat Panel Displays

All types of flat panel displays use various types of films and, in almost all types of flat panel display devices, ITO films are required to meet the requirements of transparent appliances. It is no exaggeration to say that without thin-film technology, there would be no flat-panel display devices.

4. In the use of solar energy

When the solar thermal energy needs to be used effectively, it is important to consider using an absorption surface that absorbs more of the sun's rays and less of the losses caused by thermal radiation etc. The peak of the solar spectrum is approximately in the infrared wavelength band between 2 and 20 um. Since there are differences in the wavelength bands between the solar and thermal radiation spectra, it is necessary to consider the use of absorption surfaces with wavelength-selective properties in order to make effective use of solar thermal energy.

The ideal selective absorption surface is one with an absorption rate (α) of 1 in the wavelength band of the solar radiation spectrum (visible band) and a radiance (ε) of 0 in the thermal radiation band (infrared band).

5. In anti-counterfeiting technology

There are many types of anti-counterfeiting films, which can be divided into reflective and transmissive from the method of use, and direct coated, indirectly coated or indirectly coated cut-and-paste from the way the film system is attached.

6. In the aircraft protective coating

Aircraft titanium alloy fasteners, the original use of electroplating method cadmium plating. But in the cadmium plating contains hydrogen, so in the course of flight, by the atmosphere, the corrosion of seawater alone, the plating is easy to produce "cadmium brittle", and even cause "air crash".

In 1964, the use of ion plating method in titanium alloy fasteners on the aluminum plating, to solve the aircraft parts of the "cadmium brittle" problem. In ion plating technology, due to the negative bias pressure applied to the workpiece, can form a "pseudo-diffusion layer", refining the organization of the film layer, therefore, can significantly improve the corrosion resistance of the film layer.

7. In optical instruments

People are familiar with optical instruments such as telescopes, microscopes, cameras, rangefinders, as well as mirrors, glasses and magnifying glasses in daily life, etc. They are all inseparable from the high coating technology, and the films plated are reflective films, transmissive films and absorption films, etc.

8. In the field of information storage

Thin film materials have unique advantages as information recording and storage media.

Due to the thinness of the film, eddy current losses can be ignored: the magnetisation reversal is extremely rapid; the bistable state parallel to the film surface is easy to maintain, etc. In order to record and store information more precisely, coating technology must be used.

9. In sensors

In sensors, semiconductor materials are mostly used which are extremely sensitive in electrical properties compared to physical and chemical quantities and their changes. In addition, most of them teach the use of the surface and interface properties of semiconductors, which need to maximize their area and can be made industrially and at low prices, so there are many cases where thin films are bought.

10. In the manufacture of integrated circuits

The protective layer in the product body pipeline (SiO2, Si3N4), electrode pipeline (polysilicon, aluminum, copper and its alloy), etc., are mostly used CVD technology, PVCD technology, vacuum evaporation of metal technology, magnetron sputtering technology and RF sputtering technology. It can be seen that vapour phase deposition is one of the core technologies for the preparation of integrated circuits.