Recherche

Afficher tous les résultats pour

Accueil

Personne

Thomas Maeder

Cette personne a quitté l’EPFL

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (92)

Page 3 sur 5

Transport properties of nonhomogeneous segregated composites

Thomas Maeder, Peter Ryser, Claudio Grimaldi, Biagio Nigro, Gianluca Ambrosetti

In conductor-insulator composites in which the conducting particles are dispersed in an insulating continuous matrix the electrical connectedness is established by interparticle quantum tunneling. A recent formulation of the transport problem in these kind ...

2011

Ligament balancing in TKA: Evaluation of a force-sensing device and the influence of patellar eversion and ligament release

Hannes Bleuler, Thomas Maeder, Denis Crottet

Ligament balancing in total knee arthroplasty may have an important influence on joint stability and prosthesis lifetime. In order to provide quantitative information and assistance during ligament balancing, a device that intraoperatively measures knee jo ...

Elsevier2007

Capacitive micro force sensors manufactured with mineral sacrificial layers

Thomas Maeder, Peter Ryser, Yannick Sébastien Fournier

In this work a prototype of micro force sensor of range μN...mN is presented. Instead of the traditional piezoresistive strain sensing through thick-film resistors used for higher forces, a more effective principle is used: measurement of beam displacement ...

2007

Properties and stability of thick-film resistors with low processing temperatures - effect of composition and processing parameters

Thomas Maeder, Claudio Grimaldi, Caroline Marguerite Jacq, Sonia Vionnet Menot

In this work, the properties (sheet-resistance, temperature coefficient and piezoresistance / gauge factor) and stability of thick-film resistors with low firing temperatures (525...650°C) are studied. To this end, two low-melting lead borosilicate glass c ...

2006

Meso-scale ceramic hotplates - A playground for high temperature microsystems

Thomas Maeder, Paul Muralt, Bo Jiang

This paper presents a mesa-scale low-temperature co-fired ceramic (LTCC) hotplate system. Using embedded thick-film platinum heaters, the hotplate has been able to operate at about 600 degrees C in a reliable manner, while its operating temperature can be ...

Elsevier2015

A low-temperature co-fired ceramic micro-reactor system for high-efficiency on-site hydrogen production

Thomas Maeder, Paul Muralt, Bo Jiang

A ceramic-based, meso-scale fuel processor for on-board production of syngas fuel was demonstrated for applications in micro-scale solid-oxide fuel cells (mu-SOFCs). The processor had a total dimension of 12 mm x 40 mm x 2 mm, the gas reforming micro react ...

Elsevier2015

Design of the ITER high-frequency magnetic diagnostic coils

Duccio Testa, René Chavan, Nadine Baluc, Matthieu Toussaint, Jonathan Bryan Lister, Thomas Maeder, Philippe Marmillod, Francisco Sanchez

This paper is an overview of work carried out on the design of the ITER high-frequency magnetic diagnostic coil (HF sensor). In the first part, the ITER requirements for the HF sensor are presented. In the second part, the ITER reference design of the HF s ...

Elsevier2011

Design and processing of low-range piezoresistive LTCC force sensors

Thomas Maeder, Peter Ryser, Hansu Birol, Giancarlo Corradini

Low-temperature cofired ceramic (LTCC) combines many advantageous features for low-range (force & pressure) piezoresistive sensors: ease of 3D structuration, availability of very thin sheets, low elastic modulus and yet reasonable mechanical strength. This ...

2005

Overview on low temperature co-fired ceramic sensors

Thomas Maeder

Low Temperature Co-fired Ceramics (LTCC) is one of the microelectronic techniques. This technology was initially developed as an alternative to Printed Circuit Boards (PCB) and classical thick-film technology, and it has found application in the fabricatio ...

Elsevier2015

Optimal percolation of disordered segregated composites

Thomas Maeder, Peter Ryser, Claudio Grimaldi, Niklaus Johner

We evaluate the percolation threshold values for a realistic model of continuum segregated systems, where random spherical inclusions forbid the percolating objects, modellized by hard-core spherical particles surrounded by penetrable shells, to occupy lar ...

2009

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

Nico de Rooij, Thomas Maeder, 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

Formulation of composite resistive pastes for fabrication of micro-heaters

Thomas Maeder, Peter Ryser, Nathalie Sophie Adeline Serra

We investigate in this work the formulation of composite resistive pastes based on epoxy resins and graphite for micro-heater manufacturing via thick-film technology. These resistive pastes are designed for screen-printing onto a printed circuit board (PCB ...

Elsevier2010

Integrated SMD pressure/flow/temperature multisensor for compressed air in LTCC technology: Thermal flow and temperature sensing

Thomas Maeder, Peter Ryser, Yannick Sébastien Fournier

In this work, we present and analyse the flow-sensing part of a recently-developed multisensor in LTCC (low- temperature co-fired ceramic) technology; this device integrates flow / pressure / temperature sensing and is designed for diagnostics monitoring o ...

Elsevier2011

Tunneling-percolation origin of nonuniversality: Theory and experiments

Thomas Maeder, Peter Ryser, Claudio Grimaldi, Sonia Vionnet Menot

A vast class of disordered conducting-insulating compounds close to the percolation threshold is characterized by nonuniversal values of transport critical exponent t, in disagreement with the standard theory of percolation which predicts t ...

2005

Structuration of the low temperature co-fired ceramics (LTCC) using novel sacrificial graphite paste with PVA–propylene glycol–glycerol–water vehicle

Thomas Maeder, Peter Ryser, Caroline Marguerite Jacq

A novel formulation for thick-film graphite sacrificial pastes is studied in this paper. It is composed of coarse graphite powder (grain size: 25 μm), dispersed in a vehicle consisting of polyvinyl alcohol (PVA) dissolved in a propylene glycol (PG)–glycero ...

Elsevier2011

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

Thomas Maeder, Peter Ryser, Caroline Marguerite Jacq

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

Structuration and Fabrication of Sensors Based on LTCC (Low Temperature Co-fired Ceramic) Technology

Thomas Maeder, Peter Ryser, Caroline Marguerite Jacq, Hansu Birol, Giancarlo Corradini

The purpose of this paper is to demonstrate sensors and structures fabricated using the LTCC technology, which has been addressed and employed increasingly as a smart packaging approach for several applications. The focus will be on inclination and cantile ...

Trans Tech Publications2006

Processing of Graphite-Based Sacrificial Layer for Microfabrication of Low Temperature Co-fired Ceramics (LTCC)

Thomas Maeder, Peter Ryser, Hansu Birol

The processing and application of graphite powder-based sacrificial layer for fabrication of microfluidic structures in LTCC is described. Such layers are produced as pastes, which are screen-printed in LTCC sheets to avoid sagging, by supporting closed, t ...

2006

Assessment of the ITER High-Frequency Magnetic Diagnostic Set

Thomas Maeder, Jonathan Bryan Lister, Duccio Testa, Jean-Marc Moret, René Chavan, Francisco Sanchez, Gilbert Tonetti, Albert Perez, Matthieu Toussaint

The ITER high-frequency (HF) magnetic diagnostic system has to provide essential measurements of MHD instabilities with |deltaBmeas/BPOL|~1e-4 (~1G) for frequencies up to 2MHz to resolve toroidal mode numbers (n) in the range |n|=10 to |n|=50. A review of ...

Elsevier2011

Formulation and processing of screen-printing vehicles for sacrificial layers on thick-film and LTCC substrates

Thomas Maeder, Peter Ryser, Caroline Marguerite Jacq, Yannick Sébastien Fournier

Ceramic technologies such as thick-film and LTCC (Low Temperature Cofired Ceramic) are excellent platforms for the fabrication of mesoscale devices such as sensors, actuators, microreactors and MEMS packaging. This work presents two alternative screen-prin ...

2008