The following is a brief explanation about the Pass box, it is a type of facility, which is located on the partition wall of a clean room and its function is to act as a buffer area for transferring goods between inside and outside the clean room so as to prevent disruption of air flow and air pressure in the room. Clean room, which is caused by opening a door for transferring goods which is installed in the wall between the two rooms to minimize contamination during the transport of materials.