Device and method for manufacturing crystal or polycrystal material especially polysilicon

The present invention relates to a device and method for manufacturing single crystal or polycrystal material by vertical-gradient-freeze-method especially polysilicon for photovoltaic application. According to this invention, to implement a small quantity of spoilage, because the cross-section of crucible is polygon especially rectangle or square. Around the crucible setting flat or plane heating elements especially interlayer heater which generate asymmetrical temperature distributing, which is corresponding to the temperature gradient forming in the crucible center. The heat output of the mentioned flat heating element is more and more low from crucible top to bottom, the mentioned heating element includes multiple parellel heating web plate which extends in vertical or horizontal serpentine path. To set the heat output from the mentioned web plate through changing conductor cross-section. In order to avoid local overheating in crucible corner region, there is a constriction of cross-section ...