US Patent 11309168 Vacuum processing apparatus and maintenance apparatus

A maintenance apparatus includes a case and a maintenance mechanism. The case includes an opening having a size corresponding to a second gate of a vacuum processing apparatus including a processing chamber having a first gate through which a substrate is loaded and unloaded and the second gate different from the first gate. The case is attachable to the second gate while maintaining airtightness. The maintenance mechanism is provided in the case and is configured to perform at least one of an operation of detaching a consumed part in the processing chamber through the opening, an operation of attaching a replacement part in the processing chamber and an operation of cleaning the processing chamber.