Semiconductor device and method of manufacturing the semiconductor device
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United States of America Patent
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Jun 7, 2016
Grant Date -
Dec 11, 2014
app pub date -
Aug 23, 2014
filing date -
Jan 4, 2012
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Abstract
A first nitride semiconductor layer contains Ga. The first nitride semiconductor layer is, for example, a GaN layer, an AlGaN layer, or an AlInGaN layer. Then, an aluminum oxide layer has tetra-coordinated Al atoms each surrounded by four ◯ atoms and hexa-coordinated Al atoms each surrounded by six ◯ atoms as Al atoms in the interface region with respect to the first nitride semiconductor layer. The interface region is a region apart, for example, by 1.5 nm or less from the interface with respect to the first nitride semiconductor layer. Then, in the interface region, the tetra-coordinated Al atoms are present by 30 at % or more and less than 50 at % based on the total number of Al atoms.
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