Journal
IEEE ELECTRON DEVICE LETTERS
Volume 38, Issue 6, Pages 786-789Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LED.2017.2695495
Keywords
Diamond; MoO3; MOSFETs
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We report the first attempt of the diamond MOSFETs with MoO3 dielectric directly deposited on H-diamond surface preserving atmospheric-adsorbate-induced 2DHG. The transistors with 4-mu m gate show a transconductance of 29 mS/mm and an ON-resistance of 75.25 Omega . mm at |V-GS - V-TH| = 2.2 V, respectively. The effective mobility is extracted to be 108 cm(2)/(Vs) from the relationship between the ON-resistance and |VGS - VTH|. The relatively high transconductance among the reported diamond MOSFETs with the same gate length could be attributed to the quite low ON-resistance. The evaluated high mobility indicates good interface characteristics between diamond and MoO3. However, the saturation drain current is limited at 33 mA/mm by the forward gate breakdown at VGS of around -2 V.
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