Now showing items 1-20 of 47

  • A compact charge ratio expression for the emitter delay of polysilicon emitter bipolar transistors 

    Castañer Muñoz, Luis María; Sureda, S; Bardés Llorensí, Daniel; Alcubilla González, Ramón (1994-03)
    Article
    Open Access
    A compact solution for the ratio of the excess minority carrier charge stored into the polysilicon to the charge stored in the single crystal part of the emitter of a polysilicon emitter bipolar transistor is derived. The ...
  • Al2O3/TiO2 inverse opals from electrosprayed self-assembled templates 

    Coll, Arnau; Bermejo Broto, Sandra; Hernández, David; Castañer Muñoz, Luis María (2018-01-19)
    Article
    Open Access
    The fabrication of high optical quality inverse opals is challenging, requiring large size, three-dimensional ordered layers of high dielectric constant ratio. In this article, alumina/TiO2–air inverse opals with a 98.2% ...
  • A miniaturized two axis sun sensor for attitude control of nano-satellites 

    Angulo, M.; Gras, Ana; Ortega Villasclaras, Pablo Rafael; López Rodríguez, Gema; Ricart Campos, Jordi; Domínguez Pumar, Manuel; Castañer Muñoz, Luis María; Quero, J.M.; Tarrida, C. L.; Reina, M. (2010-10-10)
    Article
    Open Access
    This paper describes the design, fabrication, characterization, and satellite integration of a miniaturized two axis sun sensor which has been used in the attitude control system of the Spanish nano-satellite NANOSAT-1B. ...
  • Analysis of GaAs-Ti thin films deposited by sputtering onto c-Si and GaAs 

    Silvestre Bergés, Santiago; Puigdollers i González, Joaquim; Boronat, A.; Castañer Muñoz, Luis María (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-02-11)
    Conference lecture
    Open Access
    Some sputtering processes of GaAs and Ti onto glass, c-Si and c-GaAs substrates have been carried out in order to obtain thin films as candidates to be intermediate band photovoltaic materials. This work presents first ...
  • Applications of hot film anemometry to space missions 

    Jiménez Serres, Vicente; Domínguez Pumar, Manuel; Ricart Campos, Jordi; Kowalski, Lukasz; Navarro, Sara; torres, josefina; Castañer Muñoz, Luis María (VDE Conference Publications, 2008)
    Conference report
    Restricted access - publisher's policy
    In this paper the most important constraints of the wind sensors for the Martian atmosphere are described, along with an overview of the past successful designs. Practically all the data available today about the Martian ...
  • Bipolar transistor vertical vertical scaling framework 

    Castañer Muñoz, Luis María; Alcubilla González, Ramón; Benavent, A (1994-12)
    Article
    Restricted access - publisher's policy
    Scaling factors for current and transit time are derived for polysilicon emitter, silicon based heterojunction bipolar transistors. It is shown that a simple set of analytical equations in integral form can be used to ...
  • Colloidal crystals by electrospraying polystyrene nanofluids 

    Coll Valentí, Arnau; Bermejo Broto, Sandra; Hernández García, David; Castañer Muñoz, Luis María (2013-01-12)
    Article
    Open Access
  • Comparison of air gap breakdown and substrate injection as mechanisms to induce dielectric charching in microelectromechanical switches 

    Molinero Giles, David; Castañer Muñoz, Luis María (American Institute of Physics, 2008-01-29)
    Article
    Restricted access - publisher's policy
    Experiments show that air breakdown and substrate carrier conduction can be responsible of the dielectric charging of microelectromechanical devices after electrical stress. Test conducted under vacuum allows us to isolate ...
  • c-Si photovoltaic arrays 

    Bermejo Broto, Sandra; Ortega Villasclaras, Pablo Rafael; Castañer Muñoz, Luis María (IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
    Conference report
    Open Access
    Crystalline silicon small photovoltaic arrays are shown. Electrical isolation of individual cells and series connection between them to integrate series arrays are discussed. High open circuit voltage values in the range ...
  • Dielectric charge measurements in capacitive microelectromechanical switches 

    Molinero Giles, David; Comulada Simpson, Ricard; Castañer Muñoz, Luis María (American Institute of Physics, 2006-09-06)
    Article
    Restricted access - publisher's policy
    Measurements of transient currents from the discharge of microelectromechanical capacitive switches after charging the dielectric with an ion gun are reported. It is shown that both the charge sign and the charge amount ...
  • Dynamic simulation of particle self-assembly applied to microarray technology 

    Virgilio, Vito di; Coll Valentí, Arnau; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (2010)
    Conference report
    Restricted access - publisher's policy
    In this work we want to explore some techniques, microfluidic and electrosprayionization based, suitable for dynamic microarrays' fabrication. The fabrication techniques are based on manipulation and self-assembly of ...
  • Effect of dielectrophoretic force in the self-assembly process of electrosprayed nanoparticles 

    Castañer Muñoz, Luis María; Bermejo Broto, Sandra; Domínguez Pumar, Manuel (2017-03-31)
    Article
    Open Access
    In this work the effect of the dielectrophoretic force (DEP) in the self-assembly process of nanoparticles electrosprayed onto a substrate, is examined. DEP force is originated by the electric field created by the electrospray ...
  • Effect of nanofluid conductivity and humidity on the self-assembly of colloidal crystals by means of electrospray 

    Coll Valentí, Arnau; Bermejo Broto, Sandra; Martín García, Isidro; Castañer Muñoz, Luis María (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference lecture
    Open Access
  • Effect of nanofluid conductivity and humidity on the self-assembly of nanoparticles deposited by electrospray 

    Coll Valentí, Arnau; Bermejo, Sandra; Martín García, Isidro; Castañer Muñoz, Luis María (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Open Access
    Electrospray technique has been used in previous works as an excellent way to develop ordered nanostructures. This work focuses on the necessary conditions to achieve 3D nano-ordered layers, which are mainly determined by ...
  • EWOD using nonaqueous liquids 

    Ahmadi, Maziar; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (2015-04-18)
    Article
    Open Access
    Electrowetting on Dielectric (EWOD) has been studied for more than a decade and used for different applications but still there are few works on non-aqueous liquids such as mixtures of polyols. We have found that significant ...
  • Fundamentos de diseño microelectrónico 

    Castañer Muñoz, Luis María; Jiménez Serres, Vicente; Bardés Llorensí, Daniel (Edicions UPC, 2002)
    Book
    Restricted access to UB, UAB, UPC, UPF, UdG, UdL, URV, UOC, BC, UVic, UJI, URL, UIC users
    El presente texto aporta el material necesario para un curso introductorio de diseño microelectrónico. Este libro está concebido como una herramienta de autoaprendizaje y, por ello, en cada capítulo se proponen numerosos ...
  • Impedance modeling of silica nanoparticle metal insulator metal capacitors 

    Veliz Noboa, Bremnen Marino; Bermejo, Sandra; Orpella García, Alberto; Castañer Muñoz, Luis María (2018-08-01)
    Article
    Restricted access - publisher's policy
    In this study, we have fabricated metal-insulator-metal (MIM) capacitors where the insulator layer is made of 255¿nm diameter silica nanospheres. The MIM devices have been characterized and modeled by electrochemical ...
  • Improving a nozzle tip with a guard ring for an electrospray system 

    Veliz Noboa, Bremnen Marino; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Restricted access - publisher's policy
    The Electrospray technique allows the formation of small droplets from aqueous solutions that may contain nanoparticles of different materials in suspension, leading to the deposition of layers of the nanoparticles. The ...
  • Improving the hydrophobicity and electrowetting reversibility of teflon layers 

    Ahmadi Zeidabadi, Maziar; Bermejo Broto, Sandra; Castañer Muñoz, Luis María (2013)
    Conference lecture
    Restricted access - publisher's policy
  • Influence of hydrogen on the optical absorption response of GaAs(Ti) films deposited by R.F. sputtering 

    Boronat Moreiro, Alfredo; Silvestre Bergés, Santiago; Castañer Muñoz, Luis María (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
    Restricted access - publisher's policy
    In the present work we have investigated the optical absorption behavior of GaAs(Ti) films deposited by r.f sputtering technique under different H2 partial pressures. In previous work we have already demonstrated the ...