Concept

Capacitor types

Publications associées (521)

Fracture in confined thin films: A discrete dislocation study

The fracture toughness of thin metal films confined between elastic layers is studied using a two-dimensional discrete dislocation (DD) method. Fracture along the metal/substrate interface is permitted through the use of a cohesive zone model. The predicte ...

2006

Friction Modeling of a High-Precision Positioning System

Alireza Karimi, Roland Longchamp, Alain Curnier, Marc Kunze, Sébastien Thiery

Friction modeling of a high-precision positioning system using linear permanent magnet synchronous motors is investigated. The friction force is measured precisely by some specific experiments to eliminate the parasitic ripple force. The experimental data ...

2006

MEMS Parallel Plate Actuators: Pull-in, Pull-out and Other Transitions

Subrahmanyam Venkata Ravi Mohana Sai Gorthi

The operational range of MEMS electrostatic parallel plate actuators can be extended beyond pull-in with the presence of an intermediate dielectric layer, which has a significant effect on the behavior of such actuators. Here we study the behavior of canti ...

2005

Characterization of deep levels in n-GaN by combined capacitance transient techniques

Jean-François Carlin, Marc Ilegems, Marcel Py

Deep centers in undoped n-GaN grown by Hydride Vapor Phase Epitaxy were characterized by Deep Level Transient Spectroscopy (DLTS), revealing four known levels with activation energies in the range 0.17-0.94 eV. Deeper levels in the bandgap were observed by ...

2005

Electrical characterization and modelling of lateral DMOS transistor

With the work reported in this manuscript we have essentially contributed to the electrical characterization and modelling of high voltage MOSFETs, more particularly DMOS architectures such as X-DMOS and L-DMOS able to sustain voltages ranging from 30V to ...

EPFL2005

Temperature dependence of the dielectric tunability of pyrochlore bismuth zinc niobate thin films

Alexander Tagantsev

The change in permittivity of bismuth zinc niobate (BZN) films with the cubic pyrochlore structure under an applied electric field was measured as a function of temperature. Dielectric measurements were performed using parallel-plate capacitor structures w ...

2005

Physical model of retention and temperature-dependent polarization reversal in ferroelectric films

Nava Setter, Alexander Tagantsev, Igor Stolichnov, Enrico Colla

The phenomenon of time-dependent polarization loss in poled ferroelectric capacitors, also known as retention, represents one of the most important reliability issues for ferroelectric nonvolatile memories. In a number of publications different ways to con ...

2005

Pulsed laser deposition of (SrBa)Nb2O6 thin films and their properties

Anna Infortuna

Strontium barium niobate (SrxBa1-xNb2O6, shortly SBN) is a solid solution system with tetragonal tungsten bronze crystal structure. It exhibits a ferroelectric phase with only one polar axis and a transition temperature depending on the Sr/Ba ratio. This t ...

EPFL2005

Thin film multilayer design types for colored glazed thermal solar collectors

Jean-Louis Scartezzini, Andreas Schueler, Christian Roecker, Estelle De Chambrier

Multilayered inteference filters of dielectric thin films have been designed for the application as energy-efficient coloration of collector cover glasses. The optical behavior of the designed multilayers is analyzed by computer simulations yielding the CI ...

2005

A contribution to energy saving in induction motors

Electric motors consume over half of the electrical energy produced by power stations, almost the three-quarters of the electrical consumption in industry and almost the half of commercial electrical consumption in developed countries. Motors are by far th ...

EPFL2005

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