SUPPORT RING FOR SUPPORTING A SEMICONDUCTOR WAFER COMPOSED OF MONOCRYSTALLINE SILICON DURING A THERMAL TREATMENT, METHOD FOR THE THERMAL TREATMENT OF SUCH A SEMICONDUCTOR WAFER, AND THERMALLY TREATED SEMICONDUCTOR WAFER COMPOSED OF MONOCRYSTALLINE SILICON

摘要

A support ring for supporting a monocrystalline silicon semiconductor wafer during a thermal treatment of the semiconductor wafer has outer and inner lateral surfaces and a curved surface extending from the outer lateral surface to the inner lateral surface, this curved surface serving for the placement of the semiconductor wafer. The curved surface has a radius of curvature of not less than 6000 mm and not more than 9000 mm for 300 mm diameter wafers, or a radius of curvature of not less than 9000 mm and not more than 14,000 mm for 450 mm diameter wafers. Use of the support ring during thermal treatment reduces slip and improves wafer nanotopography.