Patent ID: 10344374

Abstract:
Embodiments of the invention provide a mechanical chuck and a plasma processing apparatus. According to at least one embodiment, the mechanical chuck includes a base and a fixing assembly including a locking ring, an insulation ring and an spacer ring, wherein the locking ring is configured to press an edge region of the workpiece to be processed so as to fix the same onto the base; an orthogonal projection of the spacer ring on an upper surface of the locking ring overlaps with the upper surface of the locking ring; and the insulation ring electrically insulates the spacer ring from the locking ring, an inner circumferential wall of the insulation ring, a portion of the upper surface of the locking ring inside the inner circumferential wall and a portion of a lower surface of the spacer ring inside the inner circumferential wall form a first groove, and an outer circumferential wall of the insulation ring, a portion of the upper surface of the locking ring outside the outer circumferential wall and a portion of the lower surface of the spacer ring outside the outer circumferential wall form a second groove.