Growth of bulk single crystals of aluminum nitride from a melt

Single-crystal – oriented-crystal – and epitaxy growth processes; – Forming from vapor or gaseous state

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117 87, 117 88, 117 99, 117952, C30B 2502

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active

059548746

ABSTRACT:
Large diameter single crystals of aluminum nitride (AlN) are grown isotropically by injecting a nitrogen-containing gas into liquid aluminum at elevated temperatures. A seed crystal that is maintained at a temperature below that of the surrounding liquid aluminum is pulled from the melt, while the AlN that is formed in the melt is deposited on the seed crystal. An apparatus for carrying out the method is also disclosed.

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