Patent ID: 8528438

Claim:
A robotic arm for transporting a substrate in an ultrahigh vacuum, comprising: a carrier module; and a drive module, coupled to the carrier module, comprising: a magnetic coupling, comprising an inner shaft and an outer shaft, driving the carrier module; a first active unit, embedded with a magnetic component ( 4204 ); a second active unit, with a magnetic component ( 4224 ); a first passive unit, with a magnetic component ( 4208 ) connected to the inner shaft; a second passive unit, with a magnetic component ( 4228 ) connected to the outer shaft; and a first transmission module, with a first transmission motor fixed on a bottom fixing mechanism and driving the first active unit of the magnetic coupling for magnetically turning the first passive unit of the inner shaft; a second transmission module, with a second transmission motor fixed on the bottom fixing mechanism and driving the second active unit of the magnetic coupling for magnetically turning the second passive unit of the outer shaft; and a third transmission module, with a third transmission motor fixed on the bottom fixing mechanism and driving the magnetic coupling for a vertical movement thereof; wherein the inner shaft and the outer shaft are driven, respectively, by the first transmission module and the second transmission module of the drive module, for driving the carrier module for a rotational or an extending motion.