Patent ID: 8210789

Claim:
A substrate transfer device for transferring a substrate to or from a substrate processing device for processing a substrate in a predetermined atmosphere, the substrate transfer device comprising a main structural body and a transfer system unit which is configured to be removably mounted on the main structural body as a residual part of the substrate transfer device; wherein: the transfer system unit comprises: a frame body which can be mounted on and divided from the main structural body, the frame body having a first side and a second side; a robot, the robot being fixed to the frame body; and a substrate container retainer, the substrate container retainer being fixed to the frame body; the main structural body has a preparation space for receiving the robot, the robot being positioned in the preparation space when the frame body is mounted on the main structural body; the robot and the substrate container retainer are respectively arranged in predetermined positions on the transfer system unit such that the robot and the substrate container retainer form parts of the substrate transfer device when the transfer system unit is mounted on the main structural body; the transfer system unit is adapted to maintain a self supporting posture when the transfer system unit is separated from the main structural body; the frame body is provided with a respective leg section at each side of the frame body for maintaining the self supporting posture of the transfer system unit, and the frame body is provided with a respective pair of mounting sections at each side of the frame body, each pair of the mounting sections being located at points that are proximal to opposite ends of a respective one of the leg sections and configured to be mounted in a pair of mounting positions formed in the main structural body.