| CPC H01L 21/02565 (2013.01) [C23C 16/40 (2013.01); C23C 16/4481 (2013.01); H01L 21/02414 (2013.01); H01L 21/0242 (2013.01); H01L 21/0243 (2013.01); H01L 21/0262 (2013.01); H01L 21/02628 (2013.01); H10D 62/405 (2025.01); H10D 62/80 (2025.01); H10D 8/60 (2025.01); H10D 99/00 (2025.01)] | 3 Claims |

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1. An α-Ga2O3 semiconductor film having a dark spot, which is defined as a measurement point with a maximum emission intensity A of not more than 0.6 times an average value X of top 5% of the maximum emission intensities A at all measurement points in intensity mapping of plane cathodoluminescence, wherein the maximum emission intensity A at each measurement point is determined in a wavelength range of 250 to 365 nm.
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