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W4321367928 abstract "Localized epitaxy of gallium nitride (GaN) on silicon (Si) is studied, with the aim of achieving material compatible with 1200 V vertical devices, in particular an unintentional doping level <1 × 1016 cm−3, which is essential to have high quality devices. In this study, three mask materials (SiN, SiO2, Al2O3) are examined and the unintentional doping concentration in GaN layers grown by metal organic vapor phase epitaxy (MOVPE) is investigated by scanning spreading resistance microscopy (SSRM). The results from SSRM are verified by secondary ions mass spectroscopy (SIMS) and show that an unintentional doping concentration lower than 1016 cm−3 is achieved when Al2O3 is used as the mask material. This value is lower than any previous studies of localized GaN growth, and in addition, this is the first time that SSRM has been used to observe such low doping concentrations in GaN." @default.
W4321367928 created "2023-02-21" @default.
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W4321367928 date "2023-03-01" @default.
W4321367928 modified "2023-10-14" @default.
W4321367928 title "Characterization of unintentional doping in localized epitaxial GaN layers on Si wafers by scanning spreading resistance microscopy" @default.
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W4321367928 doi "https://doi.org/10.1016/j.mee.2023.111964" @default.
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