ETD-100AF is a high vacuum thermal evaporation type small film coating machine. By using the principle of resistance evaporation, the coating material on the molybdenum boat or tungsten blue or fixed bracket is heated by high current, so that it is evaporated under high vacuum and deposited on the plated sample to obtain the best coating effect. Scope of application: Sample preparation and cleaning of optical microscope, as well as scientific research, teaching and experimental activities and process tests in enterprises. A compound molecular pump with large pumping speed, high compression ratio and natural wind cooling is used to ensure that the evaporation source and the gas from the sample can be removed quickly when the spray plating is sprayed.