Patent ID: 6527859
Filing Date: 2003-03-04
Classification: C30B,Y10T

Abstract:
An apparatus for growing a single crystalline ingot comprising:a chamber; a quartz crucible established in the chamber with a diameter D of a single crystalline ingot wherein a meltdown silicon is to be put in the quartz crucible; a crucible supporter wrapping the quartz crucible, the crucible supporter fixed to a rotational axis; a cylindrical heater surrounding the crucible supporter; a thermos surrounding the cylindrical heater, the thermos preventing heat radiated from the heater from propagating into a wall of the chamber; a thermal shield including: a first cylindrical shielding part installed between the single crystalline ingot and the crucible; a second shielding part connected to an upper part of the first shielding part, the second shielding part fixed to the thermos; and a third shielding part connected to a lower part of the first shielding part, the third shielding part protruding in a direction of the single crystalline ingot, the third shielding part further including: a first convex face having a first horizontal corresponding distance W1 and a first radius of curvature R1, the first face confronting the single crystalline ingot and the meltdown silicon; a second convex face having a second horizontal corresponding distance W2 and a second radius of curvature R2, the second face confronting the heater and the meltdown silicon in an opposite direction of the single crystalline ingot; a third face confronting a circumferential face of the single crystalline ingot; and a fourth face having a third radius of curvature R3, the fourth face confronting an upper part of the chamber.