| 摘要 |
Embodiments of the present invention include a focus ring segment and a focus ring assembly. In one embodiment, the focus ring segment includes an arc-shaped body having a lower ring segment, a middle ring segment, a top ring segment and a lip. The lower ring segment has a bottom surface, and the middle ring segment has a bottom surface, wherein the middle ring segment is connected to the lower ring segment at the middle ring segment bottom surface. The top ring segment has a bottom surface, wherein the top ring segment is connected to the middle ring segment at the top ring segment bottom surface. The lip extends horizontally above the middle ring segment, wherein the lip is sloped radially inwards towards a centerline of the focus ring segment. In another embodiment, the focus ring assembly includes at least a first ring segment and a second ring segment. |
