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Using the p-type surface-conductive layer of diamond film, enhancement mode and depletion mode MESFETs have been fabricated by changing the metals of the gate electrode. The threshold voltages of MESFETs depend on the electronegativity of the metals. A MESFET with a Cr gate was operated in depletion mode and exhibited a peak transconductance of 12.3 mS mm -1 , which is the highest in...
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