Helium leak detectors are widely used. According to the sealing requirements of different products, negative pressure method, positive pressure method and helium pressure method are used. 1.Leak detection for negative pressure method Negative pressure method leak detection is to connect the detec...

Eight major semiconductor manufacturing processes: wafer manufacturing → oxidation process → photolithography process → etching process → deposition and ion implantation process → metallization process → EDS process → packaging process. The following mainly introduces the semiconductor wafer manu...

Our company specializes in processing for customers: vacuum chambers, vacuum furnace bodies, vacuum boxes, vacuum chamber bodies, vacuum valves, vacuum pipelines, various types of racks, as well as welcome drawings, materials, samples, and welding processing; Focused on cavity for twelve years. ...

  Liquid Ring Vacuum Pump used in Urea and melamine formaldehyde resins production plant   The most outstanding feature of wood adhesives is their large dosage. The cost, variety and quality of adhesives directly affect the cost, quality and use of artificial boards. Therefore, most woo...

01 Helium mass spectrometer leak detector of principle A helium mass spectrometer leak detector is an instrument commonly used to detect small leaks in vacuum systems or sealed systems. The principle is based on the low permeability and high sensitivity of helium. The gas mixed with the leaked he...

The top packaging of EVP company’s large vacuum pump(such as liquid ring vacuum pump, roots vacuum pumps, rotary piston vacuum pump, etc.) adopts the form of self-tapping screws, which is very conducive to the user or dealer to open the box, and the export goods using this screw is also convenien...

1.What is electron beam welding? Electron beam welding is a type of fusion welding that uses a concentrated high-speed electron beam to bombard the joints of the workpiece to generate heat energy to fuse the metal. 2.Basic principles of electron beam welding Under vacuum conditions, electrons esc...

When they first learn about or come into contact with the vacuum coating machine industry, many people are curious as to why the evaporation vacuum coating equipment must evaporate materials in a vacuum state, and the vacuum plating must meet certain standards. I will introduce it to you in detai...

The main influencing factors of target working stability in vacuum coating: Material selection: Different applications require different types of target materials, such as metals, ceramics, semiconductors, etc. The target material must have sufficient heat resistance and chemical stability to mai...

The temperature change during the compression of gas in the cavity of a screw pump is very small, which can be considered as isothermal compression, so it can pump flammable and explosive gases. If the medium contains particulate matter, a filter like the one shown in the figure below can also be...