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ŠIKULA, J. VRBA, R. GRMELA, L. ZEDNÍČEK, T. SITA, Z.
Original Title
Breakdown characteristics and low frequency noise of niobium based capacitors
Type
journal article - other
Language
English
Original Abstract
New capacitor technologies based on Niobium (Nb)and Niobium Oxide (NbO) powders in conjunction with niobium pentoxide (Nb2O5) dielectric have been released recently. These technologies are based on processes nearly identical to those of conventional tantalum (Ta) capacitors. One of the key features of the NbO, in contrast to Nb and Ta, is its' high resistance to ignition. This is due to the intrinsically higher ignition energy of NbO material and higher resistance failure mode after dielectric breakdown. This paper describes the behaviour of NbO capacitors after forced dielectric breakdown with both forward and reverse voltages applied. A low frequency analysis of the charge carrier transport mechanism has been performed on the Nb/NbO - Nb2O5 - MnO2 systems and the mechanisms governing current flow and noise sources have been determined. The ideal metal / insulator / semiconductor (MIS) structure is shown in Fig.1. This paper also reviews the basic features of these capacitor technologies and provides a foundation for understanding fluctuation phenomena in the real structure of niobium pentoxide
Key words in English
Niobium Oxide, breakdown, capacitors, ignition energy
Authors
ŠIKULA, J.; VRBA, R.; GRMELA, L.; ZEDNÍČEK, T.; SITA, Z.
RIV year
2003
Released
5. 4. 2003
ISBN
0887-7491
Periodical
Capacitor and Resistor Technology
Year of study
Number
4
State
United States of America
Pages from
53
Pages to
59
Pages count
7
BibTex
@article{BUT41704, author="Josef {Šikula} and Radimír {Vrba} and Lubomír {Grmela} and Tomáš {Zedníček} and Zdeněk {Sita}", title="Breakdown characteristics and low frequency noise of niobium based capacitors", journal="Capacitor and Resistor Technology", year="2003", volume="2003", number="4", pages="7", issn="0887-7491" }