Publications by Caroline Jacq | EPFL Graph Search

LTCC magnetic sensors at EPFL and TCV: Lessons learnt for ITER

Thomas Maeder, Pierre Lavanchy, Jonathan Bryan Lister, Xavier Llobet, Blaise Marlétaz, Philippe Marmillod, Matthias Garcin, Ugo Siravo, Caroline Jacq, Christian Moura, Duccio Testa, Frédéric Dolizy, Severino Antonioni, Matthieu Toussaint, Steve Couturier, Adrien Aymeric Thibault Corne, Aylwin Iantchenko, Lorenzo Stipani

Innovative 3D high-frequency magnetic sensors have been designed and manufactured in-house for installation on the Tokamak a Configuration Variable (TCV), and are currently routinely operational. These sensors combine the Low Temperature Co-fired Ceramic ( ...

2019

3D, LTCC-type, high-frequency magnetic sensors for the TCV Tokamak

Thomas Maeder, Caroline Jacq, Gaël André Léon Farine, Duccio Testa, Matthieu Toussaint, Adrien Aymeric Thibault Corne

High-frequency, 3D magnetic sensors have been designed and manufactured in-house for installation on the Tokamak a Configuration Variable (TCV). To optimize the in-vessel volume occupation, the sensors are based on combining the Low Temperature Co-fired Ce ...

Elsevier Science Sa2015

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

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

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

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

Long-term mechanical reliability of ceramic thick-film circuits and mechanical sensors under static load

Thomas Maeder, Peter Ryser, Caroline Jacq

In this work, we study the long-term mechanical strength under static load - i.e. static fatigue performance or resistance to subcritical crack growth - of ceramic thick-film circuits, namely how the static fatigue of the substrate is affected by the prese ...

Elsevier2012

Low-firing thick-film piezoresistive sensors for medical instruments

Thomas Maeder, Peter Ryser, Caroline Jacq

In this work, a low-firing thick-film materials system allowing fabrication of piezoresistive sensors on surgical alloys is presented in detail, with application to a force-sensing surgical instrument. The system comprises a series of individual thick-film ...

Elsevier2011

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 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

Thick-film multi-DOF force / torque sensor for wrist rehabilitation

Thomas Maeder, Roger Gassert, Olivier Lambercy, Caroline Jacq, Barthélémy Lüthi

A complete six degree of freedom (6 DOF) force/torque sensor has been designed and fabricated, adapted to wrist rehabilitation applications, with the focus laid on simple, straightforward manufacturing processes. This paper details the mechanical design, 3 ...

Elsevier2010

Sensors and packages based on LTCC and thick-film technology for severe conditions

Thomas Maeder, Peter Ryser, Caroline Jacq

Reliable operation in harsh environments such as high temperatures, high pressures, aggressive media and space, poses special requirements for sensors and packages, which usually cannot be met using polymer-based technologies. Ceramic technologies, especia ...

2009

Thick-film multi-DOF force / torque sensor for wrist rehabilitation

Thomas Maeder, Roger Gassert, Olivier Lambercy, Caroline Jacq, Barthélémy Lüthi

A complete six–degree-of-freedom (6-DOF) force / torque sensor has been designed and fabricated for wrist rehabilitation applications, with the focus laid on simple, straightforward manufacturing processes. This paper details the mechanical design, 3D-mode ...

Elsevier2009

Load sensing surgical instruments

Thomas Maeder, Peter Ryser, Caroline Jacq

Force and pressure sensing technology applied to smart surgical instruments as well as implants allow to give a direct feedback of loads to the surgeon lead to better reliability and success of surgical operations. A common technology used for sensors is l ...

Springer Verlag2009

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

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

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

Study of the impact of high-voltage trimming on several characteristics of model TFRs and their stability

Thomas Maeder, Peter Ryser, Niklaus Johner, Caroline Jacq

In this work we study in more details the impact of voltage trimming on different characteristics of model thick-film resistors (TFRs). Two series of RuO2-based TFRs with different conducting grain sizes are studied. As the composition of model pastes is c ...

2007

Subsolidus phase equilibria in the PbO-poor part of the TiO2–PbO–SiO2 system and its application in low-temperature thick-film dielectrics

Thomas Maeder, Caroline Jacq, Marko Hrovat

Subsolidus equilibria in the PbO-poor part of the TiO2–PbO–SiO2 diagram were studied with the aim of investigating possible applications for low-temperature thick-film dielectrics. The tie lines are between PbTiO2 and PbSiO3, and between PbTiO3 and SiO2. T ...

2006

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

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

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

High-Voltage Sensitivity Studies of Model Thick-Film Resistors

Thomas Maeder, Peter Ryser, Claudio Grimaldi, Niklaus Johner, Adrian Kambli, Caroline Jacq

In this work we seek to better understand the mechanisms governing pulse voltage trimming in disordered conductor-insulator composites. Therefore, we investigate the effect of the composition of thick-film resistors (TFRs) on sensitivity to high voltage pu ...

2006

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

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

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

Fabrication of low-temperature co-fired ceramics micro-fluidic devices using sacrificial carbon layers

Thomas Maeder, Peter Ryser, Sigfrid Straessler, Hansu Birol, Caroline Jacq

Ease of fabrication and design flexibility are two attractive features of low temperature co-fired ceramics (LTCC) technology for fabrication of complex micro-fluidic devices. Such structures are designed and processed using different shaping methods, the ...

2005