Manufacturing method of the solar-grade silicon single crystal using Czochralski-zone melting process

摘要

present invention, in an equal diameter growth step of zone melting stage, under the control of the electric control system of the zone melting silicon single crystal furnace, the lower rotary motor forward direction are rotated alternately in opposite directions, the to provide a method for manufacturing a solar-grade silicon single crystal using a predetermined forward angle and reverse angle Czochralski-zone melting process of rotating the silicon single crystal by the lower rotary motor. The present invention enhances the uniformity in the radial direction of the solar-grade silicon single crystal, and solve the problems center of solar grade silicon single crystal is blackened, the conversion efficiency of the solar cell obtained from the solar-grade silicon monocrystal it is possible to increase.FIELD 1