Stability conditions, nonlinear dynamics, and thermal runaway in microbolometers

Detalhes bibliográficos
Autor(a) principal: Brandão, G. B.
Data de Publicação: 2001
Outros Autores: Almeida, Luiz Alberto Luz de, Deep, Gurdip Singh, Lima, A. M. N., Neff, Helmut Franz
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/7681
Resumo: p. 1999-2008
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spelling Brandão, G. B.Almeida, Luiz Alberto Luz deDeep, Gurdip SinghLima, A. M. N.Neff, Helmut FranzBrandão, G. B.Almeida, Luiz Alberto Luz deDeep, Gurdip SinghLima, A. M. N.Neff, Helmut Franz2012-12-19T18:16:35Z2012-12-19T18:16:35Z2001-08-150021-8979http://www.repositorio.ufba.br/ri/handle/ri/7681v. 90, n. 4p. 1999-2008The nonlinear dynamic behavior of microbolometers, operating at room temperature (300 K) under conditions of positive electrothermal feedback is investigated. An improved device model, based on the heat balance equation is developed. It takes into account the temperature dependence of the thermophysical parameters, such as thermal coupling coefficient between the sensor and its surroundings, and sensor heat capacity and its thermal resistance coefficient. Operational considerations for thermoresistive microbolometer with positive and negative temperature coefficient of resistance are discussed for both, constant current and constant voltage modes of operation. Analytical expressions are derived for predicting stable and unstable operation. Safety factors L0, establishing the biasing conditions for stable device operation are proposed for the positive temperature coefficient of resistance and negative temperature coefficient of resistance type sensors. Limits for fast catastrophic destruction are provided, and the dynamic characteristics of the associated thermal runaway phenomenon is illustrated. This effect, as predicted by analysis and numerical simulation, was observed experimentally, confirming the validity of the proposed modeling approach for the microbolometer.Submitted by Suelen Reis (suelen_suzane@hotmail.com) on 2012-12-19T18:16:35Z No. of bitstreams: 1 __scitation.aip.org_getpdf_servlet_GetPDFServlet_filetype=pdf&id=JAPIAU000090000004001999000001&idtype=cvips&doi=10.1063_1.pdf: 681381 bytes, checksum: 37b3d4bb450bc192d2522e8a6e3b41dc (MD5)Made available in DSpace on 2012-12-19T18:16:35Z (GMT). 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dc.title.pt_BR.fl_str_mv Stability conditions, nonlinear dynamics, and thermal runaway in microbolometers
dc.title.alternative.pt_BR.fl_str_mv Journal of Applied Physics
title Stability conditions, nonlinear dynamics, and thermal runaway in microbolometers
spellingShingle Stability conditions, nonlinear dynamics, and thermal runaway in microbolometers
Brandão, G. B.
title_short Stability conditions, nonlinear dynamics, and thermal runaway in microbolometers
title_full Stability conditions, nonlinear dynamics, and thermal runaway in microbolometers
title_fullStr Stability conditions, nonlinear dynamics, and thermal runaway in microbolometers
title_full_unstemmed Stability conditions, nonlinear dynamics, and thermal runaway in microbolometers
title_sort Stability conditions, nonlinear dynamics, and thermal runaway in microbolometers
author Brandão, G. B.
author_facet Brandão, G. B.
Almeida, Luiz Alberto Luz de
Deep, Gurdip Singh
Lima, A. M. N.
Neff, Helmut Franz
author_role author
author2 Almeida, Luiz Alberto Luz de
Deep, Gurdip Singh
Lima, A. M. N.
Neff, Helmut Franz
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Brandão, G. B.
Almeida, Luiz Alberto Luz de
Deep, Gurdip Singh
Lima, A. M. N.
Neff, Helmut Franz
Brandão, G. B.
Almeida, Luiz Alberto Luz de
Deep, Gurdip Singh
Lima, A. M. N.
Neff, Helmut Franz
description p. 1999-2008
publishDate 2001
dc.date.issued.fl_str_mv 2001-08-15
dc.date.accessioned.fl_str_mv 2012-12-19T18:16:35Z
dc.date.available.fl_str_mv 2012-12-19T18:16:35Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/7681
dc.identifier.issn.none.fl_str_mv 0021-8979
dc.identifier.number.pt_BR.fl_str_mv v. 90, n. 4
identifier_str_mv 0021-8979
v. 90, n. 4
url http://www.repositorio.ufba.br/ri/handle/ri/7681
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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