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Evaluation of buried grid JBS diodes
RISE, Swedish ICT, Acreo. KTH Royal Institute of Technology, Sweden.ORCID iD: 0000-0002-9850-9440
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.ORCID iD: 0000-0003-0570-9599
RISE, Swedish ICT, Acreo.ORCID iD: 0000-0002-9512-2689
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2014 (English)In: 15th International Conference on Silicon Carbide and Related Materials, ICSCRM 2013, Trans Tech Publications Inc. , 2014, Vol. 778-780, p. 804-807Conference paper, Published paper (Refereed)
Abstract [en]

The 4H-SiC Schottky barrier diodes for high temperature operation over 200 °C have been developed using buried grids formed by implantation. Compared to a conventional JBS-type SBD with surface grid (SG), JBS-type SBD with buried grid (BG) has significantly reduced leakage current at reverse bias due to a better field shielding of the Schottky contact. By introducing the BG technology, the 1.7 kV diodes with an anode area 0.0024 cm2 (1 A) and 0.024 cm2 (10 A) were successfully fabricated, encapsulated in TO220 packages, and electrically evaluated. Two types of buried grid arrangement with different grid spacing dimensions were investigated. The measured IV characteristics were compared with simulation. The best fit was obtained with an active area of approximately 60% and 70% of the anode area in large and small devices, respectively. The measured values of the device capacitances were 1000 pF in large devices and 100 pF in small devices at zero bias. The capacitance values are proportional to the device area. The recovery behavior of big devices was measured in a double pulse tester and simulated. The recovery charge, Qc, was 18 nC and 24 nC in simulation and measurement, respectively. The fabricated BG JBS-type SBDs have a smaller maximum reverse recovery current compared to the commercial devices. No influence of the different grid spacing on the recovery charge was observed.

Place, publisher, year, edition, pages
Trans Tech Publications Inc. , 2014. Vol. 778-780, p. 804-807
Keywords [en]
4H-SiC, Buried grid (BG), Junction barrier schottky (JBS) diode, Schottky barrier diode (SBD), Diodes, High temperature operations, Recovery, Schottky barrier diodes, Commercial Devices, IV characteristics, Junction barrier Schottky diodes, Reverse recovery current, Schottky Barrier Diode(SBD), Simulations and measurements, Silicon carbide
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
SRA - Energy
Identifiers
URN: urn:nbn:se:ri:diva-27964DOI: 10.4028/www.scientific.net/MSF.778-780.804ISI: 000336634100190Scopus ID: 2-s2.0-84896087187ISBN: 9783038350101 (print)OAI: oai:DiVA.org:ri-27964DiVA, id: diva2:1069861
Conference
15th International Conference on Silicon Carbide and Related Materials, ICSCRM 2013; Miyazaki; Japan; 29 September 2013 through 4 October 2013
Funder
StandUpAvailable from: 2015-06-08 Created: 2017-01-30 Last updated: 2024-04-05Bibliographically approved

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Lim, Jang-KwonBakowski, Mietek

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