Patent ID: 9728379
Date: 2017-08-08
CPC Classifications: C23C,H01J,H01L

Claim:
1. A plasma processing apparatus comprising: an outer shell provided with a reaction chamber in the interior; a side wall of the outer shell being provided with a circular stepped hole having a step plane facing towards the outside; a bottom electrode arranged in the reaction chamber, a top of the bottom electrode being provided with a support element to support a workpiece, and a bottom of the bottom electrode being provided with a detachable cover board; and a cantilever support device laterally going through the side wall of the outer shell, the cantilever support device having a circular step plane, and the circulars plane being received by the stepped hole of the side wall, an inner end of the cantilever support device being located in the reaction chamber and supporting the bottom electrode; characterized in that the cantilever support device is pivotally mounted on the side wall of the outer shell so as to rotate in the outer shell to drive the bottom electrode to rotate in the reaction chamber; the plasma processing apparatus further comprises a locating device for fixing a relative position of the cantilever support device to a position of the outer shell during the maintenance operation so as to switch the bottom electrode between at least a maintenance state and a process state; wherein in the process state, the support element is disposed upwards for process operation to the workpiece, and in the maintenance state, the cover board is disposed upwards for a maintenance operation to the bottom electrode.