Presentation 1993/9/17
Analysis of degrading mechanisms at high current densities in highly scaled SiGe-base HBT′s.
Mamoru Ugajin, Hong Ghy-Boong, Jerry Fossum,
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Abstract(in English) Degrading effects on BJT speed performance due to current- induced perturbation of the collector-base junction space-charge region(SCR)are analyzed.Inverse base-width modulation(IBWM)-- a widening of the quasi-neutral base width -- and SCR-width widening(SCRW)in highly-scaled HBT′s are identified as important m echanisms goveming device speed degradation at high currents. Simulations and transit-time evaluations of a SiGe-base HBT show that the speed degradation associated with IBWM is predominant. Simulations of a further scaled device show that SCRW can be the significant mechanism of speed degradation at high current densities.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) cutoff frequency / BJT / SiGe / base transit time / space- charge region
Paper # ED93-88,SDM93-102,VLD93-43
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Conference Date 1993/9/17(1days)
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Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Analysis of degrading mechanisms at high current densities in highly scaled SiGe-base HBT′s.
Sub Title (in English)
Keyword(1) cutoff frequency
Keyword(2) BJT
Keyword(3) SiGe
Keyword(4) base transit time
Keyword(5) space- charge region
1st Author's Name Mamoru Ugajin
1st Author's Affiliation NTT LSI Laboratories()
2nd Author's Name Hong Ghy-Boong
2nd Author's Affiliation Department of Electrical Engineering,University of Florida
3rd Author's Name Jerry Fossum
3rd Author's Affiliation Department of Electrical Engineering,University of Florida
Date 1993/9/17
Paper # ED93-88,SDM93-102,VLD93-43
Volume (vol) vol.93
Number (no) 217
Page pp.pp.-
#Pages 7
Date of Issue