Patent ID: 7588638

Claim:
A single crystal pulling apparatus in which silicon material is melted to be a silicon liquid melt in a crucible inside a furnace body and a single crystal is pulled up from the crucible rotating about a pull-up axis by the Czochralski method, said apparatus comprising: a heater having a cylindrical exothermic part which surrounds said crucible inside said furnace body, wherein the heater is configured to melt said silicon material by thermal radiation from said exothermic part, and an electromagnet which surrounds said furnace body and is configured to apply a transverse magnetic field to said silicon liquid melt in said crucible, and wherein a length in a pull-up axis direction in the exothermic part of said heater is arranged to be 0.5 times to 0.9 times an inner diameter of said crucible, a first middle position in the pull-up axis direction in said exothermic part is arranged below a second middle position in the pull-up axis direction in said electromagnet, and a difference in distance between the first and second middle positions is 0.15 times to 0.55 times the inner diameter of said crucible.