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Proceedings Paper

Heterojunction versus homojunction transit time devices at elevated junction temperature: performance comparison at MMwave window frequency
Author(s): Moumita Mukherjee; Diptadip Chakraborty; Arijit Das
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Paper Abstract

Prospects of Si/Si0.8Ge0.2 heterojunction IMPATT devices are studied through a modified simulation technique and their performances are further compared with those of homojunction devices. This high-frequency study includes the effects of mobile space charge, parasitic resistance and also considered the detrimental role of elevated junction temperature on the maximum exploitable power level from the devices. The study indicates that under similar operating condition, Si/SiGe heterojunction IMPATT is capable of delivering a RF-power output of nearly 6W (efficiency 21%), two times higher than that from Si0.8Ge0.2 homojunction diode, which is only 13% efficient. The overall study indicates the superiority of the heterojunction diodes over their homojunction counterparts as far as negative resistance, device impedance and quality factor are concerned. To the best of author’s knowledge, this is the first report on highfrequency analysis of Si/Si0.8Ge0.2 heterojunction IMPATT.

Paper Details

Date Published: 15 October 2012
PDF: 4 pages
Proc. SPIE 8549, 16th International Workshop on Physics of Semiconductor Devices, 85490G (15 October 2012); doi: 10.1117/12.927421
Show Author Affiliations
Moumita Mukherjee, Univ. of Calcutta (India)
Diptadip Chakraborty, Univ. of Calcutta (India)
Arijit Das, Univ. of Calcutta (India)

Published in SPIE Proceedings Vol. 8549:
16th International Workshop on Physics of Semiconductor Devices
Monica Katiyar; B. Mazhari; Y N Mohapatra, Editor(s)

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