PVD coating vacuum coating machine leak detection techniques

PVD coating vacuum coating machine leak detection techniques

I believe colleagues for PVD coating vacuum coating machine has its own method of leak detection, how to PVD coating vacuum coating machine leak detection study, see the following representation:
First of all for being manufacturing process PVD coating container or device, the best bubble leak detection method using PVD coating. PVD coating bubble leak detection method was seized after ...pieces in a certain pressure is shown filled with gas into liquid leakage, PVD coating gas through the drain hole into the surrounding liquid to form bubbles, bubble formation PVD coating where the leak is located position, based on the rate of bubble formation, the size of the bubble, and the physical nature of the liquid gas D, PVD coating can roughly estimate the leak leak rate.

PVD coating cover method: PVD coated with a vinyl bag (cover) to cover up the entire device,
PVD coating and then helium filled bag, which is the whole vacuum vessel dip method in helium leak detection. PVD coating pressure rise method, after adequate ventilation, turn off the main valve, roughing valve and drain valve, with the changes in the BA ionization vacuum gauge measuring the pressure rise method to determine the presence or absence of a leak.
PVD coating is part of the pressure rise and materials leak resulting deflation pressures arising from rising sum of its parts, is now proportional to the time the final straight up. When PVD coating curves presented above in this state, indicating that the unit leak. PVD coating material does not leak just deflated, the curve should exhibit saturation; deflated only when there is no material leakage, the start time is proportional to a straight line.

Vacuum coating machine control system pressure control device

Vacuum coating machine control system pressure control device

(1) Control system composition

Vacuum coating machine in a vacuum device, due to the need of vacuum technology, and hope to maintain the pressure in the vacuum chamber to the impact of a given value, however, due to changes in the vacuum chamber to put gas or vacuum pump rate changes and other disturbing factors in, resulting in the vacuum chamber pressure deviates from the given value, and thus the need for automatic pressure adjustment. For small vacuum pressure automatically adjusts the pressure control device is usually chosen to be realized. Pressure control device for automatic pressure control system block diagram.

(2) the pressure control device selection
Vacuum coating machine pressure controller is selected based on technical requirements for vacuum apparatus and process for pressure control, pressure control of the general technical requirements for pressure control, control accuracy, reaction time, controlling the number of gas path, and control mode. Therefore, the choice of the pressure control device must meet the following requirements:

① control to meet the control requirements;

② controllable gas large ones should be equal to or greater than the required number of pneumatic control;

③ reaction the reaction time is less than the required time;

④ vacuum measurement range is greater than the pressure required adjustment range;

⑤ control instrument of pressure adjustment range is greater than the pressure of the controlled object requires adjustment range, namely vacuum flow regulating valve tuning range is greater than the pressure to regulate the flow range required range.
Where Pmax, Pmin-- adjust the minimum and maximum pressure [Pa];
Qvmax, Qvmin- a fine adjustment valve by the maximum and minimum gas flow [Pa.m3 / ls];
Se a vacuum controlled object (chamber) effective ventilation rate [m3 / s].

Tool and die superhard film vacuum coating equipments

Tool and die superhard film vacuum coating equipments

Tooling including drills, milling cutters, gear cutters, broaches, taps, scissors, shave blades,molds, injection molds, such products superhard coating system (eg: diamond film DLC, TiN, TiC,TiCN, TiAIN, CrN, ZrN, etc.) generally requires the use of an intermediate frequency magnetron sputtering and multi-arc ion plating system as film coating methods. After coating, the product life 2 to 5 times longer than non-plated products.
Tooling vacuum coating machines worked as the superhard film vacuum coating machine which normally included magnetron sputtering vacuum coating machines and multi-arc ion plating vacuum coating machines.

External factors will affect the coating machine work?

External factors will affect the coating machine work?

Vacuum requirement for environment, generally includes the vacuum equipment in laboratory (or workshop) temperature, the particles in the air and the surrounding environment, and vacuum or vacuum in vacuum evaporation coating machine on the surface of the parts or demand two aspects. These two aspects are closely linked. The environment is good or bad directly affect the normal use of vacuum ...equipment; And vacuum equipment whether to clean the inside of the vacuum chamber or load parts, lamp coating machine and directly affects the performance of the equipment. If the air contains a lot of water vapor and dust, in the case of a vacuum chamber without cleaning with oil seal mechanical pump suction, it is difficult to achieve the desired vacuum. No, should not be mechanical pump oil seal type ejector on metal corrosive, the reaction of vacuum oil to gas containing dust particles. Water vapor for the non-condensable gas, when a large number of ejector can non-condensable gas, the pump oil pollution has become more serious, more results arc ion plating machine, dropping the limits of the vacuum pump damaged the pump suction performance.
Of the dust in industry environment is the powder body, the eye to distinguish the untitled, dust. Splash control sputtering coating machine is a collection of powder or solid particles or powder body disperse state of matter. So-called refers to a collection of tiny solid particles, powder and granule refers to a count of a small matter. The smoke body is solid or liquid micro plastic vacuum coating machine in floating state small particles present in the gas system. Matter whether solid or liquid, who went into a state of particles can be collectively referred to as dust particles. To dust particles diameter to determine the size of the air cleanliness standards, to customize the level of clean room. There is a requirement for clean is not only suitable for the industrial sector, is suitable for vacuum requirement for clean environment.

PVD vacuum coating technology is what mean?

PVD vacuum coating technology is what mean?

According to the relevant provisions of the export since June 1, the coating (coating) products, must accord with standard of Europe and the United States environmental protection, the domestic electroplating (water) plating industry undoubtedly is a huge shock. Export products will be replaced by vacuum ion deposition (PVD) technology. In order to promote the replacement of the pearl river delta region of the promotion and application of surplus and the company has set up a service center in shenzhen. Set 'vacuum coating machine/power supply/technical guidance to maintain/process development/production and processing as one, to the pearl river delta market provides the omni-directional service.
Electroplating in industrial applications already a long time, but it membrane was not enough density, porosity, light coating machine is easy to hydrogen embrittlement, more serious pollution to the environment is bad, "three wastes" treatment is costly and cannot be eradicated. Especially hexavalent chromium, nickel, cadmium is harmful to human body, is a carcinogen. So the plating is replaced industrial development inevitable. Dalian university of technology from 1980 project is engaged in steel, brass parts, vacuum ion plating of aluminum base alloy replace electroplating research has been more than 20 years, has now successfully in steel, brass, aluminum alloy, zinc base alloy base material surface of ion plating chromium, titanium, zirconium, aluminum, nitride, etc. Alternative electricity galvanized, electroplating, plating nickel cadmium, chromium plating. Multi arc ion coating machine has applied for Chinese patent for invention has: the middle tier of the ion plating chromium alloy + ion plating (dark silver) + ion plating, ion plating layer alloy titanium or zirconium + ion plating transparent ceramic coating (golden brown), completely solve plating defects.

Vacuum equipment technology in the industry, we need to constantly explore deeply

Vacuum equipment technology in the industry, we need to constantly explore deeply

Light coating vendors would say, vacuum coating is a kind of producing technology of thin film materials. In a vacuum, indoor material atoms from the heating source isolate hit on the surface of the object to be plated. The technology used in the production of aluminum coating on compact disc (CD) and by the mask metal film plated on the printed circuit board. Vacuum coating is in the heart of the vacuum titanium, gold, graphite, crystal and other materials such as metal or nonmetal, gas using sputtering and evaporation, or ion plating technology. In the vacuum coating machine technology commonly used methods are: evaporation coating machine unique evaporation coating technique and construction technology of the splash control sputtering coating machine, these methods as physical vapor deposition, referred to as PVD. With the matching of chemical vapor deposition CVD technique for short. Multi arc ion coating machine in the industry as "IP" ion plating, because various gas ions and metal ions in PVD technology involved in film-forming process and play an important role, to emphasize that make use of ions, and collectively referred to as ion plating.
The vacuum coating equipment is a kind of producing technology of thin film materials. In vacuum evaporation coating machine interior materials came out from the heating source segregation of atoms on the surface of the object to be plated. The technology used in the production of aluminum coating on compact disc (CD) and by the mask metal film plated on the printed circuit board. In a vacuum membrane layer, including plating amorphous metals, semiconductors, insulators and other elemental or compound membrane. Although the chemical vapor deposition also USES reduced pressure, low pressure or vacuum means such as plasma, but general vacuum coating is to point to use the method of physical deposition film. Vacuum coating has three forms, namely evaporation coating and sputtering deposition and ion plating.

Vacuum coating machine for vacuum coating equipment film uniformity concept

Vacuum coating machine for vacuum coating equipment film uniformity concept

1. The vacuum coating machine for vacuum coating equipment on the thickness uniformity, can also be interpreted as roughness, watching it on the scale of the optical thin film (that is 1/10 of a wavelength as a unit, is about 100 a), vacuum coating uniformity is good, easy to control the roughness 1/10 of the visible light wavelength range, that is for the optical properties of thin film, vacuum coating without any obstacles. But if it is refers to the uniformity of atomic scale layer, that is to achieve 10 a 1 a smooth, even under the specific control factors according to different coating gives a detailed explanation.
2. The vacuum coating machine for vacuum coating equipment the uniformity on the chemical composition, that is to say in the film, compound of atomic group branch as a result of the scale is too small and it is easy to produce uneven characteristics of SiTiO3 film, if the coating process is not scientific, so on the surface of the component is not actual SiTiO3, and may be in proportion to the other, the plating film is not want the chemical composition of the membrane, it is also the technical content of vacuum coating. The specific factors are given below.
3. Vacuum coating machine for vacuum coating equipment the uniformity of the lattice degree of order: this determines the film is a single crystal, polycrystalline, amorphous, and is the hot issue in vacuum coating technology, specific see below.
Vacuum coating machine for vacuum coating equipment classification, there are two main categories: evaporation deposition coating and sputtering deposition coating, specific include many types, including vacuum ion evaporation, magnetron sputtering, MBE molecular beam epitaxy, sol gel method and so on.
For evaporation coating: general is heating the surface of target components in the form of groups of atoms, or ions by evaporation.