Wafer handling robot having X-Y stage for wafer handling and positioning

摘要

An apparatus for handling and positioning wafers or other flat objects. The apparatus has an XY stage with an X-drive and a Y-drive, and a bed attached to the XY stage. A chuck (e.g. a vacuum chuck) is disposed on the bed and an effector is attached to the bed. The effector can rotate about an axis of rotation extending in the Z-direction. The effector can pick up objects and place the objects onto the chuck. The effector can also pick up objects from the chuck. Preferably, the chuck has a recessed region for accommodating the effector so that the effector can be inserted under a flat object on the chuck. The X-drive or Y-drive of the XY stage provides linear motion for the effector so that the effector can pull wafers from a cassette such as used in the semiconductor industry. Alternatively, the effector is attached to a linear actuator disposed on the bed.