Patent ID: 8591648

Claim:
A crystal growing system having multiple rotatable crucibles and using a temperature gradient method, comprising: a crystal furnace; a plurality of crucibles; an supporting device; and wherein the furnace includes a furnace body, a heater, and a hearth, wherein the furnace body from outer to inner includes an outer shell, a fiber insulation layer, an insulation brick layer, and a refractory layer; wherein the supporting device includes an elevator, a plurality of crucible guiding tubes, and a plurality of holders each capable of supporting a crucible guiding tube, a moving device that is connected to the elevator, a motor with electrical power that is connected to the moving device, wherein there is an affixing device between each pair of guiding tube and guiding tube holder; where in each crucible is located in a corresponding crucible guiding tube; and wherein the characteristics are the supporting device is a multiple rotatable crucible supporting device, that there is a rotating shaft attached to the lower part of each guiding tube holder, that rotating shafts penetrating through the elevator, that there are gear connections at the lower portions of the rotating shafts coming out of the elevator, that one of the shafts is longer than to other and the longer shaft is connected through its gear and shaft coupling to the motor that is affixed to the elevator; that the height of the refractory layer is ⅔-⅚ of the total height of the hearth, and the heater is located at ¼-½ of the height of the hearth.