Molybdenum boats are used as evaporation part in vacuum coater, or in evaporator vessel, which is an essential part. Due to properties of molybdenum boats, molybdenum boats are coordinated with vacuum coater and evaporator vessel to make related machine into working.
Picture on the right side is a general view of the vacuum coater. The large cylindrical object on the left is an ion bombardier for cleaning and degassing. The substrate is at the top under the foil. The foil is there to minimize deposition on the bell jar. Evaporation was done thermally using a molybdenum boat.