Patent ID: 9001863
Filing Date: 2015-04-07
Classification: C30B

Abstract:
1. A graphite crucible for electromagnetic induction-based silicon melting, the crucible being formed of a graphite material and comprising a cylindrical body having an open upper part through which a silicon raw material is charged into the crucible, and an outer wall surrounded by an induction coil, wherein a plurality of first slits is vertically formed through the outer wall and an inner wall of the crucible, and a plurality of second slits is vertically formed from an edge of a disc-shaped bottom of the crucible toward a center of the bottom, wherein the center of the bottom is solid and is integral with a portion of the bottom contacting the inner wall, wherein each second slit of the plurality of second slits are disconnected from each other second slit of the plurality of second slits for preventing eddy current from concentrating on the center of the bottom and for preventing rapid temperature increase on the center of the bottom, and wherein at least one second slit of the plurality of second slits is disconnected from each first slit of the plurality of first slits, and at least one second slit of the plurality of second slits is connected to at least one first slit of the plurality of first slits.