Patent ID: 8556318
Filing Date: 2013-10-15
Classification: H01L

Abstract:
1. An electric-controlled operator comprising: a base; a first group of grippers coupled to the base, the first group of grippers comprising at least three grippers adapted to cooperatively grip an object and cooperatively release the object before the object is processed and a second group of grippers coupled to the base, the second group of grippers comprising at least three grippers adapted to cooperatively grip the object and cooperatively release the object after the object is processed, wherein each gripper in the first and the second group of grippers is coupled to the base via an associated cylinder, each gripper including an associated gripper arm connected to the associated cylinder, and a position of a gripper arm in the cylinder determines whether its associated gripper is in a retracted state or an extended state; a valve adapted to control the positions of the gripper arm in their associated cylinders; a controller adapted to control the valve using a control signal; and a plurality of position sensors each being associated with and adapted to sense the positions of a different one of gripper arms in the gripper arm's associated cylinder, wherein the first group of grippers and the second group of grippers are controlled individually such that when one of the first group of grippers and the second group of grippers cooperatively grips the object, the other one is in a state in which the object is released, the first group of grippers and the second group of grippers being adapted to grip the object from a same surface side of the base, and each one of the first group of grippers and the second group of grippers is adapted to cooperatively grip the object by retracting and to cooperatively release the object by stretching.