The Plasma Etching Quartz Ring presented here is a precision ground cover ring engineered for HTD electrostatic chuck (ESC) etching chambers. Fabricated from semiconductor-grade PQ811E fused quartz, this ring shields the wafer edge and the surrounding chamber hardware from reactive plasma while maintaining dimensional stability throughout long etch campaigns. Manufactured in an ISO-controlled facility and finished with Class 100 chemical cleaning, the ring delivers the low