Apparatus and method for manufacturing monocrystals

A monocrystal producing process for growing a crystal comprising arranging a funnel shaped crucible for melting a raw material in an electric furnace, keeping the crucible at a temperature not less than the melting point of the raw material, and pulling down and simultaneously rotating a seed crystal in the state that the upper end portion of the seed crystal is brought into contact with a raw material melt that has leaked out from a fine hole made at the bottom portion of the crucible,

• said process further characterized by performing the crystal growth while supplying the raw material melt continuously into the crucible to keep the outflow amount of the raw material melt from the hole at the bottom portion of the crucible substantially constant by arranging a raw material melting tank above the crucible inside the electric furnace, supplying the powdery raw material in an appropriate amount at each time from the powdery raw material tank out of the electric furnace into the raw material melting tank through a transferring tube so as to melt the powdery raw material in the raw material melting tank, and subsequently introducing the melt into a melt-collecting portion of the crucible.