Axial Gradient Transport (AGT) Growth Process and Apparatus Utilizing Resistive Heating
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United States of America Patent
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Issued Date -
Apr 7, 2016
app pub date -
Dec 14, 2015
filing date -
Dec 14, 2015
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Abandoned
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Abstract
A crucible has a first resistance heater is disposed in spaced relation above the top of the crucible and a second resistance heater with a first resistive section disposed in spaced relation beneath the bottom of the crucible and with a second resistive section disposed in spaced relation around the outside of the side of the crucible. The crucible is charged with a seed crystal at the top of an interior of the crucible and a source material in the interior of the crucible in spaced relation between the seed crystal and the bottom of the crucible. Electrical power of a sufficient extent is applied to the first and second resistance heaters to create in the interior of the crucible a temperature gradient of sufficient temperature to cause the source material to sublimate and condense on the seed crystal thereby forming a growing crystal.
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