Abstract
Inversion-channel and buried-channel gate-controlled diodes and MOSFET's are investigated in the wide bandgap semiconductor 6H-SiC. These devices are fabricated using thermal oxidation and ion implantation. The gate-controlled diodes allow room temperature measurement of surface states, which is difficult with MOS capacitors due to the 3 eV bandgap of 6H-SiC. An effective electron mobility of 20 cm/sup 2//Vs is measured for the inversion-channel devices and a bulk electron mobility of 180 cm/sup 2//Vs is found in the channel of the buried-channel MOSFET. The buried-channel transistor is the first ion-implanted channel device in SIC and the first buried-channel MOSFET in the 6H-SiC polytype. >
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