Patent ID: 8375891

Claim:
A vacuum evaporating apparatus comprising: a processing furnace; at least one processing box disposed inside the processing furnace; a heating means for heating the processing box; and an evacuating means, connected to the processing furnace for evacuating the processing furnace to a predetermined pressure in a state in which an object to be processed and a metal evaporating material are disposed in the processing box, wherein the processing box, being free to be put into, or taken out of the processing furnace, comprises: a box part which is open on an upper surface; a lid part which is detachably mounted on the open upper surface; and a flange which is bent downward and formed on an entire outer periphery of the lid part such that when the lid part is mounted on the upper surface of the box part, the flange is fit into an outer wall of the box part free from a vacuum sealing means therebetween, thereby defining a processing chamber isolated from the processing furnace, whereby, after evacuation of the processing furnace to a predetermined pressure and, as a consequent evacuation of the processing chamber to a pressure that is higher than the pressure in the processing furnace, the object to be processed is heated to a temperature at which the metal evaporating material is evaporated, thereby supplying evaporated metal atoms to the surface of the object to be processed.