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Sökning: WFRF:(Bengtsson Stefan)

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  • Alavian Ghavanini, Farzan, 1978, et al. (författare)
  • CMOS considerations in nanoelectromechanical carbon nanotube-based switches
  • 2008
  • Ingår i: Nanotechnology. - 1361-6528 .- 0957-4484.
  • Tidskriftsartikel (refereegranskat)abstract
    • In this paper, we focus on critical issues directly related to the viability of carbon nanotube-based nanoelectromechanical switches, to perform their intended functionality as logic and memory elements, through assessment of typical performance parameters with reference to complementary metal-oxide-semiconductor devices. A detailed analysis of performance metrics regarding threshold voltage control, static and dynamic power dissipation, speed, and integration density is presented. Apart from packaging and reliability issues, these switches seem to be competitive in low power, particularly low-standby power, logic and memory applications.
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  • Alavian Ghavanini, Farzan, 1978, et al. (författare)
  • Vertically aligned carbon based varactors
  • 2011
  • Ingår i: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 110:2
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper gives an assessment of vertically aligned carbon based varactors and validates their potential for future applications. The varactors discussed here are nanoelectromechanical devices which are based on either vertically aligned carbon nanofibers or vertically aligned carbon nanotube arrays. A generic analytical model for parallel plate nanoelectromechanical varactors based on previous works is developed and is used to formulate a universal expression for their voltage-capacitance relation. Specific expressions for the nanofiber based and the nanotube based varactors are then derived separately from the generic model. This paper also provides a detailed review on the fabrication of carbon based varactors and pays special attention to the challenges in realizing such devices. Finally, the performance of the carbon based varactor is assessed in accordance with four criteria: the static capacitance, the tuning ratio, the quality factor, and the operating voltage. Although the reported performance is still far inferior to other varactor technologies, our prognosis which stems from the analytical model shows a promise of a high quality factor as well as a potential for high power handling for carbon based varactors.
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  • Amirfeiz, Petra, 1973, et al. (författare)
  • Hydrophobic low temperature wafer bonding; void formation in the oxide free interface
  • 2003
  • Ingår i: Proc. of the 7th Int. Symp. on Semiconductor Wafer Bonding. ; 19, s. 267-
  • Konferensbidrag (refereegranskat)abstract
    • The objective is to investigate plasma assisted bonding processes having the potential of forming oxide-free bonded interfaces. Spontaneous low temperature hydrophobic bonding was achieved using a plasma-assisted technique. High surface energy was obtained when bonding two silicon wafers after argon plasma treatment and a subsequent dip in concentrated HF. In contrast hydrogen plasma caused bonding problems while a mix of hydrogen and nitrogen improved the bondability. A particular interest is directed toward the generation of voids as a consequence of storage at room temperature or low temperature annealing. All samples suffer from void generation both after storage at room temperature and after low temperature annealing.
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  • Resultat 11-20 av 351
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Bengtsson, Stefan (26)
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Bengtsson, Stefan L. ... (25)
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Stefan, Ioana (21)
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