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Thomas Maeder

Cette personne n’est plus à l’EPFL

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Publications associées (96)

Optimisation of industrial production of low-force sensors – adhesive bonding of force-centring ball

Thomas Maeder, Peter Ryser, Caroline Jacq, Maxime Blot

This work addresses the issue of attaching the force-centring part (a round ball) to the load cell of a force sensor, a piezoresistive thick-film Wheatstone bridge deposited onto a ceramic cantilever. As the current soldering process requires expensive met ...

IOP2015

Design and packaging of a highly integrated microreactor system for high-temperature on-board hydrogen production

Thomas Maeder, Paul Muralt, John Richard Thome, Navid Borhani, Dimos Poulikakos, Bo Jiang

Highlights • A “plug-and-play” microreaction system for high-temperature reactions (>500 °C). • Efficient thermal decoupling for using standard electrical/fluidic connections. • Automatic and accurate temperature control for calorimetric measurements. • A ...

Elsevier2015

Screen-printed electrochemical chromium (VI) sensing electrodes for effluent bioremediation monitoring

Thomas Maeder, Caroline Jacq

Simple, low-cost and acid-resistant carbon-based screen-printed electrodes (SPEs) addressed to detection of hexavalent chromium species, Cr(VI), in sulfuric acid at pH about 1, were prepared and characterized. Working and counter electrodes were prepared j ...

Elsevier2014

Fabrication and Test of High-Temperature Ceramic Transformer

Thomas Maeder, Peter Ryser, Conor Joseph Slater

This work describes the fabrication and test of a high temperature (+200°C) capable high frequency transformer. It was manufactured using Low Temperature Co-fired Ceramic (LTCC) technology, which allowed the complex multilayer structure of ceramic and meta ...

2014

A thermally self-sustained micro-power plant with integrated micro-solid oxide fuel cells, micro-reformer and functional micro-fluidic carrier

Thomas Maeder, Claude Muller, Paul Muralt, Dimos Poulikakos, Alex Dommann, Bo Jiang

Low temperature micro-solid oxide fuel cell (micro-SOFC) systems are an attractive alternative power source for small-size portable electronic devices due to their high energy efficiency and density. Here, we report a thermally self-sustainable reformer – ...

Elsevier2014

Tuneable PTC effect in polymer-wax-carbon composite resistors

Thomas Maeder, Peter Ryser, Caroline Jacq, Ludivine Ammon

Purpose: The resistivity dependence on temperature of composite resistors made of carbon fillers dispersed in an organic matrix are known to be strongly affected by the matrix thermal expansion. High positive temperature coefficient (PTC) effects, i.e. ess ...

Emerald2014

A miniature frequency-stabilized VCSEL system emitting at 795nm based on LTCC modules

Thomas Maeder, Nico de Rooij, Yves Pétremand, Fabrizio Vecchio

We present a compact frequency-stabilized laser system locked to the Rubidium absorption line of a micro-fabricated reference cell. A printed circuit board (PCB) is used to carry all the components and part of the electronics, and low-temperature co-fired ...

Elsevier2013

FireBird: PowerPC e200 Based SoC for High Temperature Operation

Thomas Maeder, Yusuf Leblebici, Pascal Andreas Meinerzhagen, Radisav Cojbasic, Andreas Peter Burg, Conor Joseph Slater, Ömer Cogal, Carl Christian Sten Dominic Senning

PowerPC Architecture microcontrollers are commonly used in embedded applications. In this work we present FireBird, the first PowerPC based SoC for reliable operation beyond 200C. It is a significant challenge to design SoCs for reliable operation at high ...

2013

Multi-injection microstructured reactor for intensification of fast exothermic reactions: proof of concept

Thomas Maeder, Lioubov Kiwi, Albert Renken, Bo Jiang, Julien Haber

Quasi-instantaneous exothermic reactions lead to the formation of unwanted hot spots even when carried out in conventional microstructured reactors (MSR) with tube diameter of 100 − 1000 μm. For this reason, alternative MSR designs are warranted to enable ...

Walter de Gruyter2013

Superparamagnetic anisotropic elastomer connectors exhibiting reversible magneto-piezoresistivity

Thomas Maeder

An anisotropic magnetorheological composite formed by dispersions of silver-covered magnetite microparticles (Fe3O4@Ag) in polydimethylsiloxane (PDMS) displaying electrical conduction only in one preferred direction is presented. A set-up for applying and ...

Elsevier2013

Review of Bi2O3-based glasses for electronics and related applications

Thomas Maeder

The present work critically reviews the scientific and patent literature on low-melting bismuth-based oxide glass frits in materials for electronics, sensors and related applications such as sealing glasses, solar cells, architectural and automotive glass, ...

Maney Publishing2013

Effects of Thermal Losses on the Heating of a Multifunctional LTCC Module for Atomic Clock Packaging

Thomas Maeder, Peter Ryser, Fabrizio Vecchio, Conor Joseph Slater

An innovative multifunctional LTCC module has been designed for miniature atomic clock packaging. The components of miniature atomic clocks need to be efficiently packaged and connected to each other, and a precise temperature control is required for them. ...

Trans Tech Publications Ltd2012

A micro heater platform with fluid channels for testing micro-solid oxide fuel cell components

Thomas Maeder, Paul Muralt, Dimos Poulikakos, Bo Jiang

Micro-scale solid oxide fuel cell is a promising power generation technology for portable devices such as laptop, medical devices and personal electronics. One of the key goals in design of μ-SOFC systems is to use common hydrocarbon fuels such as propane/ ...

Elsevier2012

LTCC-Based Sensors for Mechanical Quantities

Thomas Maeder, Carolin Lohrberg

Besides their excellent dielectric and thermo-mechanical characteristics Low Temperature Cofiring Ceramics (LTCC) are also well suited for the fabrication of 3D micromechanical components such as sensors for mechanical quantities. This paper describes the ...

Soc Microelectronics, Electron Components Materials-Midem2012

A nanoparticle bed micro-reactor with high syngas yield for moderate temperature micro-scale SOFC power plants

Thomas Maeder, Paul Muralt, Dimos Poulikakos, Bo Jiang

This work introduces and investigates the a novel compact catalytic nanoparticle bed micro-fabricated reactor suitable for utilization in small-scale intermediate-temperature micro-SOFC systems. It is shown that the presented micro-reactor is able to produ ...

Elsevier2012

Syngas generation from n-butane with an integrated MEMS assembly for gas processing in micro-solid oxide fuel cell systems

Thomas Maeder, Paul Muralt, Dimos Poulikakos, Bo Jiang

An integrated system of a microreformer and a carrier allowing for syngas generation from liquefied petroleum gas (LPG) for micro-SOFC application is discussed. The microreformer with an overall size of 12.7 mm × 12.7 mm × 1.9 mm is fabricated with micro-e ...

Royal Soc Chemistry2012

Test vehicle for studying thermal conductivity of die attach adhesives for high temperature electronics

Thomas Maeder, Peter Ryser, Fabrizio Vecchio, Conor Joseph Slater

Polymer adhesives offer a viable method for mounting silicon dies for high temperature applications. Here a test vehicle for comparing the thermal conductivity of different die attach materials is presented. The setup can be used to determine the degree of ...

Trans Tech Publications Ltd2012

3D structuration of LTCC and related technologies for thermal management and microfluidic structures

Thomas Maeder, Peter Ryser, Caroline Jacq, Bo Jiang, Fabrizio Vecchio, Conor Joseph Slater

Ceramic technologies such as LTCC (Low Temperature Co-fired Ceramic) and thick-film are used widely in electronic circuits exposed to harsh environments, for applications in fields such as aerospace, automotive and energy exploration, where, owing to their ...

Soc Microelectronics, Electron Components Materials-Midem2012

Piezoresistive effect in epoxy–graphite composites

Thomas Maeder, Peter Ryser

In this work, we investigate the piezoresistive response of epoxy–graphite composites. A resistive thick-film Wheatstone bridge is deposited by screen-printing onto a beam, a weight is then applied on the tip of the beam and the resulting electrical signal ...

Elsevier2012

Effects of Thermal Losses on the Heating of a Multifunctional LTCC Module for Atomic Clock Packaging

Thomas Maeder, Peter Ryser, Fabrizio Vecchio, Conor Joseph Slater

Trans Tech Publications2012

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