The importance of cleaning in vacuum electroplating process
The cleaning treatment of vacuum electroplating surface is very important, which directly affects the quality of electroplating products. Before the workpiece enters the coating room, it must be carefully cleaned before plating. The surface pollution comes from various dust, lubricating oil, engine oil, polishing paste, grease, sweat stains and other substances adhered to the workpiece during processing, transmission and packaging. In order to avoid defects caused during processing, vacuum plating processing manufacturers can basically remove them by degreasing or chemical cleaning methods. The cleaned surface shall not be stored in the atmospheric environment, but shall be stored in closed containers or cleaning cabinets to reduce dust contamination. The adsorption of hydrocarbon vapor can be minimized by storing the glass substrate in a freshly oxidized aluminum container. Because these containers preferentially adsorb hydrocarbons. For vacuum coating processing, highly unstable and sensitive surfaces to water vapor should generally be stored in a vacuum drying oven.
The basic requirements of the vacuum coating process for the environment are to remove the dust in the coating room, set up a clean workshop and keep the room highly clean. In areas with high air humidity, the substrate and all parts in the vacuum chamber shall be carefully cleaned before plating, and baking and degassing shall also be carried out. To prevent oil from entering the vacuum chamber, pay attention to the return of oil from the oil diffusion pump, and take oil retaining measures for the diffusion pump with high heating power.
