Numerical Investigation of the DC and RF Performances for a 4H-SiC Double Delta-Doped Channel MESFET Having Various Delta-Doping Concentrations

Abstract:

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A double delta-doped channel 4H-SiC MESFET is proposed to kick out degradation of the DC and RF performances caused by the surface traps, by forming a quantum-well-like potential well and separating an effective channel from the surface. To obtain an optimum device structure, the DC and RF performances of double delta-doped channel MESFETs having various delta-doping concentrations but the same pinch-off voltage with that of conventional MESFET were also investigated. The SilvacoTM simulation results show that the double delta-doped channel MESFET achieved more improvement of the drain current, the cut-off frequency, and the maximum oscillation frequency for higher delta-doping concentration near the gate. In all cases, DC and RF performances for double delta-doped channel MESFETs are much improved than those of the conventional MESFET.

Info:

Periodical:

Materials Science Forum (Volumes 556-557)

Edited by:

N. Wright, C.M. Johnson, K. Vassilevski, I. Nikitina and A. Horsfall

Pages:

823-826

DOI:

10.4028/www.scientific.net/MSF.556-557.823

Citation:

I. H. Kang et al., "Numerical Investigation of the DC and RF Performances for a 4H-SiC Double Delta-Doped Channel MESFET Having Various Delta-Doping Concentrations", Materials Science Forum, Vols. 556-557, pp. 823-826, 2007

Online since:

September 2007

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$35.00

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