QUARTZ GLASS CRUCIBLE WITH INNER SURFACE PARTIALLY COATED WITH SYNTHETIC QUARTZ

摘要

PROBLEM TO BE SOLVED: To provide a quartz glass crucible having a high single-crystallized ratio. SOLUTION: The quartz glass crucible is used for pulling up a silicon single crystal. The inner surface part of the sidewall of the crucible or the inner surface part of the bottom thereof is formed of synthetic quartz, and the remaining inner circumferential part is formed of natural quartz.