US Patent 9623555 Dual arm robot

A substrate processing apparatus including a frame, a first arm coupled to the frame at a shoulder axis having a first upper arm, a first forearm and at least one substrate holder serially and rotatably coupled to each other, a second arm coupled to the frame at the shoulder axis where shoulder axes of rotation of the arms are substantially coincident, the second arm having a second upper arm, a second forearm and at least one substrate holder serially and rotatably coupled to each other, and a drive section connected to the frame and coupled to the arms, the drive section being configured to independently extend and rotate each arm where an axis of extension of the first arm is angled relative to an axis of extension of the second arm substantially at each angular position of at least one of the first arm or the second arm.