Patent ID: 6936135

Claim:
In a plasma processing chamber, a confinement ring coupling arrangement for coupling a confinement ring to a plunger, said plunger being configured to move said confinement ring to deploy and stow said confinement ring to facilitate processing of a substrate within said plasma processing chamber, said confinement ring coupling arrangement comprising: a hanger adapter having a locking head, said hanger adapter being configured to be coupled with said plunger; and a hanging bore disposed in said confinement ring and configured to receive said locking head and to secure said locking head within said hanging bore during stowing and deployment of said confinement ring, wherein a diameter of said locking head is sufficiently smaller than a cross-section dimension of said hanging bore to prevent a sidewall of said locking head from scraping against a sidewall of said hanging bore during said stowing and deployment of said confinement ring.