Various working principle of Vacuum coating equipments

Various working principle of Vacuum coating equipments

Vacuum coating equipments can be divided into: evaporation vacuum coating equipments, magnetron sputtering vacuum coating equipments and ion plating vacuum coating equipments.
Evaporation vacuum coating machine working principle is to put the coating materials into the vacuum chamber,heating to evaporate the evaporation source, when the mean free path of molecules is greater than the linear dimensions of the evaporation vacuum coating chamber, atomic and molecular vapor escaping from the surface of the evaporation source, little impact and impede other molecules or atoms, can be plated directly to the surface of the substrate, due to the low temperature of the substrate, and then condense on film.
Magnetron Sputtering vacuum coating machine is formed by a vacuum glow discharge, accelerate the positive ions bombard the target so that the sputtering phenomenon caused by the surface, so that the target surface deposition of particles emitted onto the substrate to form a film.
Multi-arc ion vacuum plating machine is the use of a vacuum arc discharge evaporation source count for technology that ignited the evaporation source (cathode) in a vacuum environment, between the anode and the formation of a self-sustaining arc discharge, both cathode material released from the cathode arc shining point ions. Since the current local concentration, the Joule heat generated by the cathode material locally explosively into plasma, under the influence of operating bias of a compound with the reaction gas, and the deposition is formed on the surface plated layer.

Analysis Principle vacuum coating equipment

Analysis Principle vacuum coating equipment

Principle is the principle of magnetron sputtering vacuum coating equipment , as follows:
Colliding electrons accelerated in the electric field toward the substrate during in and argon atoms, a large number of ionized argon ions and electrons, the electrons onto the substrate. Argon ions accelerated in the electric field bombardment target, a large number of target atoms sputtered, neutral target atoms... deposited in a film on the substrate.
Secondary electrons accelerated toward the substrate in the process influenced by the magnetic force of the magnetic field Lorenzi, bound within plasma region near the target surface, a high plasma density region, under the effect of the secondary electrons around the magnetic field the target surface in a circular motion, the motion path of the electrons is very long, constantly in motion the process of collision ionization of argon atoms with a large amount of argon ion bombardment target, after several collisions electron energy decreases, get rid of the shackles of the magnetic field lines , away from the target, eventually deposited on the substrate.
Magnetron sputtering is bound to a magnetic field and to extend the path of movement of electrons, the electrons change the direction of motion, increase the ionization rate of the working gas and the efficient use of energy of the electron vacuum coating apparatus.
Electronic destination just substrates, the vacuum chamber wall and the target source anode is electronic home. But generally the vacuum chamber and the substrate and the anode potential in the same. Interaction between magnetic field and electric field so that a single spiral electron trajectory in three dimensions, and not only in a circular motion in the target surface. As for the type of the target surface sputtering the circumferential contour, and that the magnetic field lines are targets of the circumferential shape of circular. Distribution of magnetic field lines in different directions will film a great relationship.
Coating machine manufacturers said, not only in the interaction mechanism magnetron sputtering magnetic and electric fields of work, multi-arc plated target ion source, a plasma source and so work under this principle. The difference is that the electric field direction, voltage and current magnitude only.

How a full range of vacuum coating machine equipment maintenance

How a full range of vacuum coating machine equipment maintenance

Continuous use of more than 12 months for vacuum coating equipment, the inside of the pumping speed will be slow, that is about to do a good job cleaning in a timely manner. First filling the air, down connection pipe, unload electric furnace plate and nozzle. Pump cavity and pump gallbladder points three times cleaning, use gasoline to clean again, first with detergent to clean it again, then clean with clear water thoroughly clean. After being dried, rejoin the pump oil, packed pump, and put back into the body, can restart. Before restarting, attention should be paid to leak detection work. Start the maintain pump, close the door, after a few minutes, observe whether diffusion pump part of the vacuum degree is 6 x10 palmer, otherwise for leak detection. Check whether the connection place o-ring seal, or crush seal ring. Eliminate leakage hidden trouble is heating, or diffusion pump oil will burn ring, unable to enter the working state.
Each completed more than 200 coating procedures for vacuum coating equipment, should be a clean the studio. Multi arc ion plating factory house that swab repeatedly with caustic soda saturated solution vacuum chamber wall, (pay attention to safety can not direct contact with caustic soda solution, so as not to burn) purpose is to make up the membrane material plating aluminum react with caustic soda, membrane layer falls off after reaction, and release hydrogen, reoccupy clear water clean vacuum chamber and a cloth stained with gasoline to clean the dirt in the valve, if you need a light coating machine, please contact us, price concessions, service is good.
Thick in the vacuum coating equipment should change new oil pumping work continuously for 30 days. The old oil discharged completely within the pump. Screw bolt playback oil, add new oil to the quantitative.

Vacuum coating vendors would coating technology application profile

Vacuum coating vendors would coating technology application profile
Is the most common wet coating deposition process we see glass coated with silver mirror, in some places is still in use today. Common wet French pattern on the plating items is to use chemicals to produce chemical reaction, reaction of adhesive on the surface of plated items, and combine together to form a layer of coating.
Wet coating work elements are:
1. Chemical agents to participate in chemical reactions
2. The chemical reaction pool
3. The auxiliary additives
4. The catalyst
5. Reaction electrode
We can see that due to the preparation of coating chemical reaction method, people can't accurate control of chemical reaction in the pool every small areas of the situation, to a great extent, people couldn't sophisticated control layer in the process of production of uniform thickness. In quite a number of cases is plated items do not allow to have a chemical reaction. For example, in the single pervious to light glass coating production such as glass and chemical reaction is likely to damage of the glass surface, pervious to light fall, it would be lost to the coating. Were the most serious questions, most used chemicals, auxiliaries, strong catalyst are polluting, some are highly toxic, he brings to the human and the nature, even catastrophic damage is huge. Some film system cannot be prepared with chemical method.

What products include vacuum equipment?

What products include vacuum equipment? 

Complete vacuum equipment from a combination of a large number of components, with the development of vacuum equipment by industry can differentiate into different industry equipment, used in many of the basic industrial products. Composed of vacuum equipment can be divided into four parts: First, get a vacuum device, and second, carrying vacuum equipment, vacuum measuring instruments Third, Fourth, vacuumaccessories.
Vacuum equipment
Vacuum equipment is a pump, subdivision include: Roots vacuum pumps, reciprocating pumps, rotary piston vacuum pumps, rotary vane vacuum pumps, liquid ring vacuum pumps, steam pumps, jet pumps, molecular pumps, ion pumps. Need to learn more about the data and parameters for each pump, vacuum pump products please venue area.
Vacuum carrying equipment
That is the main bearer of vacuum equipment vacuum equipment, each industry is different, such as coating industry called vacuum coating equipment, drying industry called vacuum dryer, the packaging industry called vacuum packing machines, equipment for each type of industry they can be divided into different functional processes device. Here's to the film industry for example:
Vacuum coating equipment can be divided into vacuum magnetron sputtering equipment, vacuum evaporation coating equipment, vacuum ion plating equipment, vacuum physical vapor deposition equipment, vacuum optical coating equipment. Each device because of the use of technology and technology is different so there are differences, but also because of different products require different types of processes.
Vacuum measuring instruments
Vacuum measuring instruments include vacuum pressure tester, flow meter, vacuum leak. Vacuum pressure tester called the vacuum gauge (resistive vacuum gauge, compound vacuum gauge, thermocouple vacuum gauge, etc.); vacuum leak leak sparks, halogen leak detector, helium leak detectors, etc; flow meter there rotameter, dropper flowmeter, mass flowmeter.
Vacuum Accessories
Vacuum fittings are connected to each vacuum equipment components ties, commonly used vacuum accessories vacuum valves, vacuum line fittings, vacuum pump oil.

The vacuum knowledge

The vacuum knowledge

First, the basic concept of vacuum
Vacuum technology, the "vacuum" refers to a given space, the gas pressure is below atmospheric pressure gas state, that is to say, compared with the normal atmospheric pressure, a gas is relatively lean state.
　The degree of vacuum is an objective measure of the degree of lean gas. According to the theory of vacuum technology, the vacuum level is usually represented by gas pressure. In the International System of Units, the pressure is Pa (Pa) as a unit 1Pa = 1N / m2. Another common unit as well as child care (Torr), millimeters of mercury (mmHg), millibar (mbar), engineering atmospheric pressure (kg / cm 2).
　Divided vacuum region is no uniform requirement, it usually is divided country:
Rough vacuum: (760 to 10) Torr
Low vacuum: (10 to 10-3) Torr
High vacuum: (10-3 to 10-8) Torr
Ultrahigh vacuum: (10-8 ~ 10-12) care
XHV: 10-12 Torr
　Relations care and Pa: 1 Torr = 1 mm Hg (mmHg) = 133.322Pa, 1 Pa = 7.5 × 10-3 Torr.
　Features vacuum region of their different applications are different, such as vacuum cleaners work in rough area, thermos bottle, light bulbs and other work in the low vacuum region, while the vacuum switch and some other vacuum devices are working in a high vacuum region.All of the vacuum pressure need the vacuum pumps,or vacuum system to reach,such as rotary vane vacuum pump,liquid ring vacuum pump,rotary piston vacuum pump,dry scroll vacuum pump and so on.

How to detect the performance of the vacuum coating equipment?

         

  Vacuum coating equipment is used for the preparation of vacuum membrane equipment, vacuum coating equipment has a significant impact on performance of film, so, how to detect the performance of the vacuum coating equipment? Underneath, small make up teach you how to detect the performance of the vacuum coating equipment.
1, after coating with coating equipment, film base material of the thin film on the edge of the drum is not uniformity should be less than or equal to 1 cm.
2, the homogeneous degree of the film in terms of lateral change value is around 10%.
3, put film base material from the position of the fluorescent lamp 50 cm, with fluorescent detection without scars.
4, different film plating system, requirements are different, but are generally not required at most only one pinhole within 1 square meters. Pinhole is due to the deposition in the process of small aluminum droplet splash on the substrate.