Patent ID: 8337616

Claim:
An apparatus for producing a single crystal having at least: a chamber; a crucible in the chamber; a heater arranged around the crucible; a pulling mechanism for pulling a seed crystal; and a leading passage for the seed crystal and the single crystal to be grown; and producing the single crystal by melting a polycrystalline raw material contained in the crucible by the heater, bringing the seed crystal into contact with the polycrystalline melt and pulling the seed crystal, wherein the apparatus includes a cylindrical quartz pipe having a curved-surface-shaped bottom portion and a dome-shaped quartz plate, the curved-surface-shaped bottom portion being a closed bottom surface, the quartz pipe being configured to increase heat quantity applied to the polycrystalline raw material by reflecting heat rays during melting the polycrystalline raw material, the quartz pipe being arranged from an upper portion of the chamber through the leading passage so that the curved-surface-shaped bottom portion faces an upper portion of the crucible, and the quartz plate is arranged so as to surround the quartz pipe, the quartz pipe has a reflecting structure where at least the bottom portion reflects heat rays, and the quartz plate has a reflecting structure where heat rays are reflected toward the crucible, the reflecting structures of the quartz pipe and quartz plate are produced by any of gold plating, gold evaporation and gold coating, and the quartz plate has a sandwich structure where the reflecting structure of the quartz plate is covered with quartz.