Application and principle of plasma cleaning machine
1、 Degreasing and cleaning of metal surface
There are often organic substances such as grease and oil on the metal surface and oxide layer. Before sputtering, painting, bonding, bonding, welding, brazing, PVD and CVD coating, plasma treatment is required to obtain a completely clean and oxide free surface. Plasma treatment in this case will produce the following effects:
1.1 ashing surface organic layer
- the surface will be subjected to chemical bombardment
- partial evaporation of pollutants under vacuum and instantaneous high temperature
- the pollutants are crushed under the impact of high-energy ions and carried out by vacuum
- UV radiation destroys pollutants
Because plasma treatment can only penetrate a few nanometers per second, the pollution layer cannot be too thick. Fingerprints also apply.
1.2 oxide removal
Metal oxides react chemically with the process gas
- partial evaporation of pollutants under vacuum and instantaneous high temperature
- the pollutants are crushed under the impact of high-energy ions and carried out by vacuum
- UV radiation destroys pollutants
Because plasma treatment can only penetrate a few nanometers per second, the pollution layer cannot be too thick. Fingerprints also apply.
1.2 oxide removal
Metal oxides react chemically with the process gas
This treatment uses hydrogen or a mixture of hydrogen and argon. Sometimes a two-step treatment process is also used. The first step is to oxidize the surface with oxygen for 5 minutes, and the second step is to remove the oxide layer with a mixture of hydrogen and argon. It can also be treated with several gases at the same time.
1.3 welding
Usually, printed circuit boards are treated with chemical flux before welding. After welding, these chemicals must be removed by plasma method, otherwise it will bring corrosion and other problems.
- Add:
- Tel: 14778271944
- Fax: 0755-29082663
- Email: xbcled@163.com
NewsYour position: Home > News