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The dependency of Ti atom composition in Ti-C mixed electrodes on Ohmic characteristics for AlGaN/GaN structure is examined by elucidating the role of both Ti and C atoms. Owing to AlGaN surface reduction by reaction with C atoms with thermal treatment, an enhanced reaction of Ti atoms and AlGaN layer has been confirmed. The border of reactive layer and the remaining AlGaN layer has shown rather uniform...
Metal induced effects on electrical characteristics in AlGaN/GaN Schottky HEMT are reported. Focus is given to the collapse of drain current attributed to Schottky metal. Of particular interest for discussion is that TiN gate can suppresses the collapse of drain current compared with conventional Ni gate. Nitrogen concentrations in TiN gate are found to be correlated to the current collapse, indicating...
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