Methods for growing a crystal ingot with reduced dislocations from a crucible
AssigneeCorner Star Limited
InventorsTirumani N. Swaminathan, Salvador Zepeda, John David Hilker
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Abstract
Methods for growing a reduced dislocation crystal ingot in an ingot growing system are disclosed. The system has a first crucible with a first base and a first sidewall extending upward from the first base to define an outer cavity. The method includes placing a weir in the outer cavity, placing a second crucible on the weir, placing feedstock material into the outer cavity, and melting the feedstock material to allow movement of the melt from the outer cavity inward of an intermediate cavity and into an inner cavity.
Claims20
A method for growing a crystal ingot from a melt in a crystal growing system, the system including a first crucible having a first base and a first sidewall extending upward from the first base, the first crucible defining an outer cavity inward of the first wall, the first base having a top surface, the method comprising:
- placing a weir along the top surface of the first base to inhibit movement of the melt from a location outward of the weir to a location inward of the weir;
- placing a second crucible within the outer cavity at a location on top of the weir, the second crucible having a second base and a second sidewall forming an outer cavity, the second base having a crucible passageway extending therethrough, the crucible passageway located inward of the weir, the weir forming an intermediate cavity inward of the weir and between the first crucible and the second crucible;
- bonding the weir to at least one of the first base of the crucible and second base of the second crucible continuously around a circumference of the weir;
- placing feedstock material into the outer cavity;
- and
- melting the feedstock material to form the melt to allow movement of the melt from the outer cavity inward of the intermediate cavity and into the inner cavity.
A method for growing a crystal ingot from a melt in a crystal growing system, the system including a first crucible having a first base and a first sidewall extending upward from the first base, the first crucible defining an outer cavity inward of the first wall, the method comprising:
- placing a weir within the outer cavity at a location along the first base to inhibit movement of the melt from a location outward of the weir to a location inward of the weir;
- placing a second crucible within the outer cavity at a location on top of the weir, the second crucible having a second base and a second sidewall forming an outer cavity, the second base having a crucible passageway extending therethrough, the crucible passageway located inward of the weir, the weir forming an intermediate cavity inward of the weir and between the first crucible and the second crucible;
- bonding the weir to at least one of the first base of the first crucible and the second base of the second crucible continuously around a circumference of the weir;
- placing feedstock material into the outer cavity;
- and
- melting the feedstock material to form the melt to allow movement of the melt from the outer cavity inward of the intermediate cavity and into the inner cavity.
Dependencies are inferred from the claim text.