Method of manufacturing a double-crucible for the Czochralski growing technique

摘要

A method of manufacturing a crucible for a double-crucible growing technique comprising the steps of: feeding quartz powder into a rotating mold; forming a crucible-like quartz powder layer body with the help of a centrifugal force in the mold; melting the layer body by heating through the inner surface with an arc discharge to manufacture an outer crucible member; and welding an inner crucible member to the outer crucible member while a temperature of the inner surface portion of the outer crucible member remains at 1400 °C or higher by a remaining heat. Quartz glass crucible for a double-crucible growing technique can be manufactured with excellent characteristics of junction, a low production cost and a high production yield.