Concept

Ceramic capacitor

Publications associées (377)

Thick-Film Radial Position Sensor for High Temperature Active Magnetic Bearings

Roland Siegwart, Thomas Maeder, Luc Burdet, Beat Aeschlimann

This paper presents the development of radial eddy-current position sensors for high temperature active magnetic bearing (AMB) applications. Thick-film technology was used to realize silver coils printed on ceramic substrates. Long term measurements showed ...

2006

Solar blind AlGaN photodetectors with a very high spectral selectivity

Nicolas Grandjean, Mauro Mosca

Solar blind detectors based on AlGaN heterostructures grown on sapphire by Molecular Beam Epitaxy and with a dielectric interference filter deposited on the back side are demonstrated to provide record spectral selectivity. Rejection ratios of 2 x 10(4), a ...

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

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

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

Effect of spontaneous polarization screening on dielectric response of ferroelectric polydomain films

Nava Setter, Alexander Tagantsev, Pavel Mokry

A theoretical study on the effect of spontaneous polarization screening on the dielectric response of ferroelectric films with 180 degrees domains going through the film thickness (through-domains) is presented. It has been shown by several researchers tha ...

2005

Microscopic aspects of the region-by-region polarization reversal kinetics of polycrystalline ferroelectric Pb(Zr,Ti)O-3 films

Nava Setter, Alexander Tagantsev, Igor Stolichnov, Enrico Colla, Lisa Malin

The region-by-region polarization switching in ferroelectric Pb(Zr,Ti)O-3 thin films sandwiched between Pt electrodes has been directly observed using piezoelectric scanning probe microscopy. A resolution improved by one order-of-magnitude compared to the ...

2005

Dynamics of polar clusters in relaxor ferroelectrics

Nava Setter, Kyle Brinkman

The paper brings results of far infrared transmission studies of relaxor ferroelectric PbMg1/3Nb2/3O3 and PbSc1/2Ta1/2O3 thin films performed at temperatures between 10K and 900K. The spectra clearly show that the lowest-frequency polar optic phonon soften ...

2005

Miniaturized hybrid inductors and transformers

In the frame of this thesis, we have developed a novel batch-type technology for the realization of three-dimensional millimeter-size transformers for ultra-small low-power (0.1-1 Watt) applications. The technology is based on the three-dimensional micropa ...

EPFL2005

Integration and modeling of ferroelectric devices in a standard CMOS porcess for low power non-volatile memories

Vincent Meyer

The present work analyzes the impact of ferroelectric materials like PZT when integrated in a standard 0.5µm CMOS process in order to realize nonvolatile memories. The project has been initiated conjointly by the Swiss Federal Institute of Technology of La ...

EPFL2005

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