980 V, 33A Normally-Off 4H-SiC Buried Gate Static Induction Transistors

Abstract:

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In this work, we succeeded in developing high performance normally-off SiC buried gate static induction transistors (SiC-BGSITs). To achieve the normally-off characteristics, design parameters around the channel region were optimized and process conditions were improved to realize these parameters. The off-state characteristic of the SiC-BGSIT showed an avalanche breakdown voltage of VBR=980 V at a gate voltage of VG=0 V. Furthermore, the leakage current at VD=950 V is lower than 0.5 μA. These results indicate that the BGSIT has a good normally-off characteristic. At VG=2.5 V, an on-resistance of 28.0 mΩ corresponding to the specific on-resistance of 1.89 mΩ•cm2 was obtained and the current rating was calculated as 33 A at a power density of 200 W/cm2 in the on-state characteristic.

Info:

Periodical:

Materials Science Forum (Volumes 679-680)

Edited by:

Edouard V. Monakhov, Tamás Hornos and Bengt. G. Svensson

Pages:

662-665

DOI:

10.4028/www.scientific.net/MSF.679-680.662

Citation:

A. Takatsuka et al., "980 V, 33A Normally-Off 4H-SiC Buried Gate Static Induction Transistors", Materials Science Forum, Vols. 679-680, pp. 662-665, 2011

Online since:

March 2011

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Price:

$35.00

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