SAPPHIRE WAFER, AND MANUFACTURING METHOD OF SAPPHIRE WAFER

摘要

PROBLEM TO BE SOLVED: To provide a sapphire wafer having coloring caused by molybdenum impurities decolorized.SOLUTION: To provide a sapphire wafer having a warp of 5 μm/inch or less to diameter and a molybdenum content region of a molybdenum content of 5 ppm or more and not having a blue-colored region and a brown-colored region.SELECTED DRAWING: Figure 4