CPC C30B 15/14 (2013.01) [C30B 15/30 (2013.01)] | 18 Claims |
1. A temperature field device for crystal growth, comprising:
a first drum;
a second drum located inside the first drum;
a bottom plate mounted on a bottom of the temperature field device and covering a bottom end of the first drum;
a first cover plate mounted on a top of the temperature filed device and covering a top end of the first drum, wherein the first cover plate includes a first through hole and a second through hole configured for gas passing; and
a second cover plate mounted inside the first drum and covering a top end of the second drum, wherein the second cover plate includes a third through hole corresponding to the first through hole and a fourth through hole corresponding to the second through hole, the third through hole and the first through hole having a same rotation central axis, and the fourth through hole and the second through hole having a same rotation central axis.
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