Micro-hot-plates without simply connected hot-spots and with almost-circular-temperature distribution (Articolo in rivista)

Type
Label
  • Micro-hot-plates without simply connected hot-spots and with almost-circular-temperature distribution (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Alternative label
  • Usman Khana, Christian Falconia,b,* (2013)
    Micro-hot-plates without simply connected hot-spots and with almost-circular-temperature distribution
    in Elsevier Science information
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Usman Khana, Christian Falconia,b,* (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • aDepartment of Electronic Engineering, University of Tor Vergata, Via del Politecnico 1, 00133 Rome, Italy bCNR IDASC, Via Fosso del Cavaliere, 100, 00133 Rome, Italy (literal)
Titolo
  • Micro-hot-plates without simply connected hot-spots and with almost-circular-temperature distribution (literal)
Abstract
  • We have recently shown that the temperature distribution in micro-hot-plates with perfectly circulargeometry can be accurately expressed in terms of modified Bessel functions. However, the geometry ofpractical micro-hot-plates cannot be perfectly circular due to several issues, including the presence ofthe electrical contacts; in fact, a typical manifestation of poor circular-symmetry is the occurrence ofsimply connected hot-spots. Here we systematically investigate all these issues and describe strategiesfor designing micro-hot-plates without simply connected hot-spots and with an almost circular temper-ature distribution. FEM simulations consistently confirm that our methodology reduces the temperaturedeviations from ideal circular symmetry down to levels which are unimportant for most applications (e.g.less than 2.5oC for a micro-hot-plate operating at 800oC). As a result of the excellent circular symmetry,the temperature distribution in the proposed micro-hot-plates, unlike previously reported devices, canbe accurately expressed in terms of the modified Bessel functions, which is a key step toward the designof micro-hot-plates with unprecedented temperature uniformity or with desired temperature profiles. (literal)
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