Sputtering on glass - technology features

Sputtering on glass - technology features The technology of spraying various coatings on glass

Spraying metal oxides and the metals themselves on the glass surface makes it possible improve the quality of glass, and also give it certain additional properties that are very useful. Surely many of us have noted "one-way" mirrors in films.

With their help, those outside the room can observe those inside. The latter, in turn, will not see the thesis who is outside, and the ways to see in this glass only their reflection.

Such glasses are eaten in reality and are most often used not for espionage, but to protect various objects from prying eyes, and to create them, mirror dusting on the glass is used.

Technological features of spraying

The principle of this effect is based on the fact that a darkened room is difficult to view against the background of brighter reflections.

Sputtering on glass - technology features Today there are no translucent mirrors that would be able to transmit light in one direction and do not skip to another. In order to make such glass, people began to use special methods that allow products with a one-sided effect.

For example, simple mirrors can be glass with an extremely dense as well as thick reflective coating on the back surface. Mirrors, which have one-sided transparency, are made by analogy, but at the same time a thinner and light-transmitting coating layer is used.

As an alternative, today a part uses a mirror film, which will be applied to the surface of the product. This mirror type film can be easily applied to an already finished product.

There are two main methods of spraying:

  • Pyrolytic method (it is carried out during production).
  • Vacuum type of spraying (applied to finished types of products, by means of special type installations).

Today there are several types of vacuum-type deposition, and the most popular can be called high-speed magnetron and ion-plasma.

Details. Types

Magnetron sputtering

This type of processing will involve the application of different types of metals and their compounds to glass surfaces using the magnetron sputtering method. Products are processed in a closed space. This type of processing is carried out at the molecular level, due to which the products receive high performance and quality characteristics. To obtain the desired effect, various gases are often used - nitrogen, oxygen, or even argon.

During the reaction, layers of metals are formed on the surface of the products. This will provide the ability to produce glasses with different desired characteristics.

Glass tinted using magnetron sputtering technology has a number of advantages:

  • Excellent reflective characteristics.
  • Excellent thermal reflection characteristics.
  • Thanks to the ability to simulate the thickness of the metal layer that has been applied, manufacturers have ways to make glasses with the required characteristics of light reflection and light transmission.

  • This type of coating can even be applied to patterned glass.
  • Relatively low, and also acceptable cost.

Consider the second processing technology.

Ion plasma spraying

Sputtering on glass - technology features To apply ionic plasma type of spraying on glass, it is imperative to place the product in a vacuum. In a closed space, there is an inert gas, cathodes with a negative charge and a metal coating, an anode that is positively charged, and a bearing with triple liners

.

The spray layer is applied to the bearing during processing. The plasma method makes it possible to apply to the surface of products alloys of all kinds of metals, as well as their compounds, such as silver, titanium, aluminum, chromium, nickel, etc. The quality of the applied coatings will always directly depend on the surface quality.

In such a case, one should also take into account such moments as the texture or roughness of the workpiece, the quality of preparation of the surface itself, and also the culture of production. It can be noted that the very stringent requirements for surface preparation, as well as the price of the equipment used, can be called a limiting factor that will affect the spread of such methods.

Sapphire

Sapphire-coated glasses will deserve special attention. In the watch industry, this technology is often used to create watch faces. Mineral glass is used as a material for production, which, in turn, is artificially grown from silicon oxide crystals. For lovers of especially durable glasses, Swiss craftsmen even made glasses from sapphire of artificial origin.

Such products will be characterized by high strength and no less high cost.

The solution between price and strength was found after the invention of mineral-type glasses, which were deposited with sapphires. This type of spraying has the strength of a sapphire and the price of a simple mineral. The only drawback is the fast abrasion time.

Results

Technologies make it possible to apply tint high-quality, low-emission, self-cleaning coatings to the glass surface, which can have any given degree of efficiency. Coatings containing oxides are more durable than metal coatings.

They are much more resistant to influences and are chemically related to glass.

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