Questions about vacuum coating, please help me answer them.

I'm afraid that you may not be able to send others away with 100 points for these problems, so let's do it for another year, don't you know. The second is that your company is too powerless, and you can't even afford a detector, and it's only more than 200,000.

The paint depends on what material the coating substrate is, and there are generally special ones, thinners, and paints are described.

1. The simplest inspection of the vacuum system is to spray acetone to the connection position, if the vacuum indication fluctuates instantaneously, there is a leak. If the system usually reaches a certain vacuum level after 10 minutes, and suddenly the vacuum level cannot be reached in one day, it is an air leak: so the vacuum arrival time should be recorded once a day.

2. The cleaning of the vacuum chamber has seen the best in its original state, that is, the metal should see its true color; The most intuitive is that the maximum part of the membrane layer on the cavity wall or on the hanger reaches a few mm or more, or it is cleaned regularly, such as once a week, 3 days, etc. The hanger should be cleaned frequently, not more than a week; But it can also be treated simply, just spray the sand or scrape off the film;

3. Under normal circumstances, the diffusion pump oil should be replaced in about a year, or the color can be changed when the color becomes darker; The replacement method is: remove the pump, remove the pump core tower, pour out the waste oil, you can use 120 gasoline or carbon tetrachloride to clean the tower body, pump chamber, if necessary, you can use fine sandpaper to polish it; After cleaning, use a hair dryer to dry or dry (pay attention to safety), install it one by one in turn, add oil (generally the pump has the amount and model of oil), and test the vacuum after installation.

4. The dust and oil stains of the product can be wiped with acetone or cleaned with alcohol ultrasonic;

I don't understand.

The so-called vacuum coating is a process in which the material to be plated and the substrate to be plated are placed in a vacuum chamber, the material to be plated is heated by a certain method, evaporated or sublimated, and splashed onto the surface of the substrate to be plated to form a film. Under vacuum conditions, film formation can reduce the collision of atoms and molecules of the evaporated material with molecules in the process of flying to the substrate, reduce the chemical reaction (such as oxidation, etc.) between the active molecules in the gas and the evaporation source material, and reduce the amount of gas molecules entering the film to become impurities during the film forming process, so as to provide the density, purity, deposition rate and adhesion to the substrate of the film. Vacuum evaporation usually requires the pressure in the film forming chamber to be equal to or lower than 10-2Pa, and the pressure is lower when the evaporation source is far away from the substrate and the film quality is very high.

In the evaporation coating process, particles that evaporate from the surface of the film move in a straight line in space at a certain speed until they collide with other particles. In a vacuum chamber, when the concentration of particles in the gas phase and the pressure of the residual gas are low enough, these particles can fly in a straight line from the evaporation source to the substrate, otherwise, they will collide and change the direction of motion. For this reason, it is necessary to increase the mean free path of the residual gas to reduce its collision with the evaporated particles, and to pump the vacuum chamber into a high vacuum.

The average free path of the evaporated particles must be much greater than the evaporation distance to avoid the collision of the evaporated particles with the residual gas molecules during the migration to the substrate, so as to effectively reduce the scattering phenomenon of the evaporated particles. At present, the evaporation distance of the commonly used evaporation coating machine is not more than 50 cm. Therefore, if you want to prevent the scattering of large amounts of evaporated particles, the initial vacuum of the vacuum coating chamber must be higher than 10-2 pA in a vacuum evaporation coating plant.

If the vacuum degree is high, the vacuum coating quality is better.

All coating technologies require an evaporation source or target to convert the evaporated film material into a gas. Due to the continuous improvement of the source or target, the selection range of film materials has been greatly expanded, whether it is metal, metal alloy, intermetallic compounds, ceramics or organic substances, various metal films and dielectric films can be evaporated, and different materials can be evaporated at the same time to obtain multilayer films.

Based on vacuum technology, it uses physical or chemical methods and absorbs a series of new technologies such as electron beam, molecular beam, ion beam, plasma beam, radio frequency and magnetron to provide a new process for thin film preparation for scientific research and actual production.

To put it simply, vacuum coating is the method of evaporating or sputtering a metal, alloy or compound in a vacuum to solidify and deposit it on the coated object (called a substrate, substrate or substrate).

It is directly related to the color, abrasion resistance and firmness of the coated product. A small amount of gas is usually added during the coating process, and by controlling the arc power supply, the ionization rate of the substrate material in the vacuum chamber can be increased. It can also be controlled by a magnetic field.

Wait to change the appearance and intrinsic quality of the product. The main impact is on the coating process. Regardless of the coating method, the higher the vacuum, the fewer tramp gas atoms will be in the furnace, and the composition of the coating will be closer to your desired ratio.

To put it simply, purity and crystallization are more controllable.

Suzhou Keyang Coating Products **** takes PVD vacuum coating as the core business, and carries out surface coating processing for various plastic parts. According to the needs of customers, we can provide one-stop comprehensive services including molds, injection molding, painting, printing, and laser carving. Our processes and products have been successfully applied to many industries such as automotive, fire protection, communications, computers, consumer electronics, lighting, cosmetics, packaging and so on.

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Summary. As we all know, on the surface of some materials, as long as a layer of film is coated, the material can have many new and good physical and chemical properties. In the 70s of the 20th century, the main methods of coating on the surface of objects were electroplating and electroless plating.

In the former, the electrolyte is electrolyzed by applying electricity, and the electrolyzed ions are plated onto the surface of the substrate as another electrode, so the substrate must be a good conductor of electricity under the conditions of this coating, and the thickness of the film is difficult to control. The latter is the use of chemical reduction method, the membrane must be prepared into a solution, and can quickly participate in the reduction reaction, this coating method not only has poor binding strength of the film, and the coating is neither uniform nor easy to control, but also will produce a large amount of waste liquid, causing serious pollution. As a result, these two coating processes, known as wet coating methods, are very limited.

Vacuum coating is a new type of coating technology developed relative to the above-mentioned wet coating method, which is commonly called dry coating technology.

Can vacuum coating be recoated?

No. I want 2 coatings. It is necessary to dispose of the coating before hitting.

Vacuum coating is an important aspect of vacuum application, which is based on vacuum technology, using physical or chemical methods, and absorbing a series of new technologies such as electron beam, molecular beam, ion beam, plasma beam, radio frequency and magnetronics, to provide a new process for thin film preparation for scientific research and actual production. Simply put, the method of evaporating or sputtering a metal, alloy or compound in a vacuum to solidify and deposit it on the coated object (called a substrate, substrate or substrate) is called vacuum coating.

As we all know, on the surface of some materials, as long as a layer of film is coated, the material can have many new and good physical and chemical properties. In the 70s of the 20th century, the main methods of coating on the surface of objects were electroplating and electroless plating. In the former, the electrolyte is electrolyzed by electricity, and the ions of the electrolytic celery are plated onto the surface of the substrate as another electrode, so the substrate must be a good conductor of electricity, and the thickness of the film is difficult to control.

The latter is the use of chemical reduction method, the membrane must be prepared into a solution, and can quickly participate in the reduction reaction, this coating method not only has poor binding strength of the film, and the coating is neither uniform nor easy to control, but also will produce a large amount of waste liquid, causing serious pollution. As a result, these two coating processes, known as wet coating methods, are very limited. Vacuum plating is a new type of coating technology developed relative to the above-mentioned wet coating method, which is commonly called dry coating technology.

Summary. 1. Surface cleanliness The surface cleanliness of the product is not enough, and argon amplification and long time can be considered when the ion source is cleaned. 2. The problem in the cleaning process is that the cleaning before plating is not in place, or the cleaning solution is replaced.

3. Whether the process parameters have changed, and the coating time and current should be adjusted appropriately. 4. Whether the titanium target is poisoned or not, check and replace it. 5. Whether the vacuum chamber is leaking or not.

6. There are many reasons for oxidation and oxidation on the surface of the product, and you can judge and deal with it by yourself.

1. Surface cleanliness The surface cleanliness of the product is not enough, and argon amplification and long time can be considered when the ion source is cleaned. 2. The problem in the cleaning process is that the cleaning before plating is not in place, or the cleaning solution is replaced. 3. Whether the process parameters have changed, and the coating time and current should be adjusted appropriately.

4. Whether the titanium target is poisoned or not, check and replace it. 5. Whether the vacuum chamber is leaking or not. 6. There are many reasons for the oxidation and oxidation of the surface of the product, and you can judge and deal with it by yourself.

Ruler base carrying. Vacuum coating technology is a novel new technology for material synthesis and processing, and is an important part of the field of surface engineering technology. Vacuum coating technology is the use of physical and chemical means to coat the solid surface with a layer of special properties of the coating, so that the solid surface of Voy Kit has wear resistance, high temperature resistance, corrosion resistance, oxidation resistance, lack of pure radiation protection, conductivity, magnetic conductivity, insulation and decoration and many other superior properties superior to the solid materials themselves, to improve product quality, extend product life, save energy and obtain significant technical and economic benefits. Therefore, vacuum coating technology is known as one of the more promising important technologies, and has shown attractive market prospects in the development of high-tech industrialization.

It is mainly used for coating under high vacuum, and there are many industries that use it, such as automotive, medical, transportation, machinery, services, etc., and now it is a coating equipment that is very close to people's lives. Vacuum front coating equipment is an important part of the coating industry, without advanced and efficient coating equipment, there is no modern coating industry.