Patent ID: 8123855

Claim:
A method of producing a silicon single crystal, comprising the following steps: (a) charging the raw polycrystalline silicon with Ga directly embedded in the center thereof in a quartz crucible in a chamber of a heating device; (b) filling said chamber with an inert gas at a flow rate between 20-35 L/hour; (c) maintaining the pressure within said chamber in the range from 1900 to 2000 Pa; (d) melting said raw polycrystalline silicon with Ga embedded therein by heating said quartz crucible to produce a melt, (e) positioning a lower opening rim of a gas flow guide at a distance between 5 and 25 mm above the surface of said melt, (f) preheating, lowering and immersing a seed crystal into said melt; and (g) pulling said seed crystal from said melt to produce a silicon single crystal comprising a neck portion, a shoulder portion and a main body.