SILICA GLASS CRUCIBLE FOR PULLING UP SILICON SINGLE CRYSTAL, METHOD FOR MANUFACTURING THEREOF AND METHOD FOR MANUFACTURING SILICON SINGLE CRYSTAL

摘要

A silica glass crucible for pulling up a silicon single crystal including a wall part and a bottom part is provided with a natural silica glass layer which forms at least one part of a an inner surface of the bottom part, and a synthetic silica glass layer which forms at least an inner surface of the wall part, wherein a concentration of Ca included in the natural silica glass layer is 0.5 ppm or less.