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PEOPLE@HES-SO - Verzeichnis der Mitarbeitenden und Kompetenzen

PEOPLE@HES-SO
Verzeichnis der Mitarbeitenden und Kompetenzen

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Filliger Sebastian

Filliger Sebastian

Praktikant

Hauptkompetenzen

Inkjet

Dropwatching

Ra&D

Industrial printer

Analog Electronics

Digital Electronics

Measurement Techn.& Instrumentation

  • Kontakt

  • Forschung

  • Publikationen

  • Konferenzen

Hauptvertrag

Praktikant

Büro: MIC_10_153

Haute école d'ingénierie et d'architecture de Fribourg
Boulevard de Pérolles 80, 1700 Fribourg, CH
HEIA-FR
Es müssen keine Daten für diesen Abschnitt angezeigt werden.

Abgeschlossen

Développement d'une méthode digitale d'activation de surface et déposition du matériel par plasma
AGP

Rolle: Mitarbeiter

Description du projet: PVD and plasma spraying technics are nowadays widely used. In the last few decades there has been an intense development in non-equilibrium ('cold') plasma surface processing systems at atmospheric pressure. This new trend is stimulated mainly to decrease equipment costs by avoiding expensive pumping systems of conventional low-pressure plasma devices. Cold plasma become a subject of great interest for a wide variety of technologies including surface treatment and thin-film deposition. However, the current techniques are all based on single nozzle or grouped multi-nozzle solutions, no arrays composed of individually addressable single nozzle are available yet. This interdisciplinary project DigitalPlasma aims through an approach combining current inkjet and single addressing array technology to develop novel and innovative digital cold plasma head. The consortium will work on: Single plasma cell, array technology & configuration suitable for digital control Power electronics and switches Control and interface system for jet arrays Plasma on demand with a 2x16 nozzle array as demonstrator Finally, this will all be built into a digital plasma platform to evaluate the feasibility of digital layer deposition with digital plasma. The project combines the specific & complementary expertise of the 2 involved Institutes: iPrint (HEIA-FR) & Systemtechnik (HESSO-Vs).

Forschungsteam innerhalb von HES-SO: Ellert Christoph , Bourguet Florian , Kolly Gaëtan , Bircher Fritz , Filliger Sebastian , Bürgy Olivier , Renner Johannes , Berthouzoz David , Martinet David , Mauron Muriel , Kessler Philip , Arcudi Carmine , Udry Julien , Schneuwly Vincent , Germanier Alain , Roubaty Fabrice , Gugler Gilbert , Brügger Luca , Carrie Natalia , Brodard Patricia , Stefanucci Alfonso , Lapaire Clovis , Blum Remo , Molliet Renata , Trottet Grégory , Mabillard Eric

Partenaires académiques: HES-SO Rectorat; VS - Institut Systèmes industriels; FR - EIA - Institut IPRINT

Durée du projet: 01.01.2019 - 29.10.2021

Montant global du projet: 270'000 CHF

Zustand: Abgeschlossen

The Inkjet Training
AGP

Rolle: Mitarbeiter

Requérant(e)s: FR - EIA - Institut IPRINT, Bircher Fritz, FR - EIA - Institut IPRINT

Financement: Divers

Description du projet: A Hands-on Lab-based Course in Inkjet Engineering and Inkjet Chemistry.

Forschungsteam innerhalb von HES-SO: Caldi Jonathan , Wenger Raphaël , Bourguet Florian , Kolly Gaëtan , Bircher Fritz , Filliger Sebastian , Huber Benjamin , Renner Johannes , Mauron Muriel , Kessler Philip , Soutrenon Mathieu , Murith Loïc , Schneuwly Vincent , Varisco Massimo , Kuhlmann Martin , Muller Nicolas , Jemmely Yannick , Gugler Anne , Carrie Natalia , Ilano Céline

Partenaires académiques: FR - EIA - Institut IPRINT; Bircher Fritz, FR - EIA - Institut IPRINT

Durée du projet: 31.08.2015 - 31.12.2020

Montant global du projet: 332'965 CHF

Zustand: Abgeschlossen

2023

Printhead nozzle status detection
Professioneller Artikel ArODES

Sebastian Filliger

Specialist printing worldwide,  2023, 3, 8-10

Link zur Publikation

Zusammenfassung:

Sebastian Filliger of iPrint, discusses the deelopment of a solution for printhead nozzle status detection, in partnership with STEINEMANN DPE and Polytype AG.

2022

Individual ignition of RF microplasma array at atmospheric pressure
Wissenschaftlicher Artikel ArODES

David Martinet, Sebastian Filliger, Alain Germanier, Gilbert Gugler, Christoph Ellert

Plasma Processes and Polymers,  2022, article no. e2200131

Link zur Publikation

Zusammenfassung:

Following the trend of miniaturization in semiconductor industry, atmospheric plasma jets in array configuration were developed for cleaning or treatment of workpieces under homogeneous conditions. We describe here first, the development of a small array of five individual identical plasma cells where each cell is ignited and quenched individually, which can be upscaled to several tens or hundreds of cells. The power electronics for ignition of plasma is composed of a multiplexing system with a kHz high-voltage plasma ignition pulse and an RF-supply that can be distributed to each ignited cell to maintain the plasma in the respective cell. Experimental results show an ignition voltage for argon of 1300 V and RF-current per cell of 70 mA.

2024

Piezoelectric-based monitoring of pressure variations in inkjet printhead
Konferenz ArODES

Loïc Bullot, Carlos Chabert Ull, Sebastian Filliger, Luca Brügger

Proceedings of the Advanced Inkjet Technology Conference, 29-31 January 2024, Fribourg, Switzerland

Link zur Konferenz

Zusammenfassung:

The popularity of inkjet technology is growing in the industry due to the many benefits it brings. However, the complexity of the process and hardware required to deliver a drop on demand accurately and at high speed poses a reliability challenge. With many complex parameters in the ink and printhead affecting drop quality, maintaining a stable environment is key. There has been increasing interest in sensing technologies that use the piezoelectric actuator in the nozzle to measure the acoustic response of the nozzle chamber. Several papers have been published on the use of piezo sensing to detect nozzle status. The aim of this paper is to present an innovative way of measuring the ink pressure within the nozzle chamber by sensing the piezoelectric response. Driving and measurement are performed using custom hardware to quantify the acoustic response of the system after actuation of the piezo. The variations in the dominant frequency of the response signal can then be correlated with variations in pressure. This method makes it possible to measure pressure variations along the print head, opening up a range of new possibilities for identifying events that can have a direct impact on print quality.

In-process ink rheology monitoring for inkjet printing using piezo self-sensing
Konferenz ArODES

Sebastian Filliger, Luca Brügger, Julian Piller, Gaël Perritaz, Loïc Bullot, Carlos Chabert Ull

Proceedings of the Advanced Inkjet Technology Conference, 29-31 January 2024, Fribourg, Switzerland

Link zur Konferenz

Zusammenfassung:

Inkjet is gaining popularity in digital production for its high flexibility, productivity and compatibility with many substrates. The core of the inkjet system is the printhead, a sophisticated device depositing ink accurately and on demand through thousands of independent nozzles. However, the complexity of the printhead presents challenges for maintenance and stable operation. Therefore, maintaining precise control over all process parameters is essential to ensure consistent quality and optimal performance. Ink rheology is an important process parameter to control. Changes in rheology caused by solvent evaporation, ink aging, sedimentation or simply a slightly different formulation of the manufacturer can lead to major quality flaws in the printing process. Commercial solutions for rheology measurements can typically only measure viscosities at frequencies of up to 10 kHz and the measurement takes place outside of the printing process. Here, a measurement system has been developed, which can monitor the rheology in the process at internal resonance frequencies of 100-200 kHz using only the printhead as the measurement device together with printing electronics which has piezo self-sensing capabilities. This system is an upgrade to a previously developed and industry tested nozzle status monitoring system that uses the piezoelectric effect to map printhead internal acoustics for nozzle failure detection.

2022

Inkjet printing : a new technique for manufacturing solid insulation systems
Konferenz ArODES

Ioana Preda, Dominique Rolle, Sebastian Filliger, Natalia Carrie, Gilbert Gugler

Proceedings of 4th International Conference on Dielectrics, 3rd-7th July 2022, Palermo, Italy

Link zur Konferenz

Zusammenfassung:

This work investigates several dielectric coatings, of different thicknesses, applied over metalized layers. More precisely, acrylate-based dielectric materials were fabricated using two different additive manufacturing techniques: spincoating and inkjet. While microscope imaging showed that uniform layers could be achieved by both techniques, breakdown strength, along with partial discharge measurements showed that microstructural defects were present in the bulk and that the quality of the printed layers decreases as the thickness of the layers increases. Nevertheless, it is shown that lacquer insulating layers, of variable thickness, can be easily obtained by inkjet printing. Even without any process optimization, they exhibit good dielectric properties, which shown their potential for electrical engineering applications.

2021

Investigation of ink-jet printed lacquer systems for coating applications
Konferenz ArODES

Ioana Preda, Sebastian Filliger, Natalia Carrie, Gilbert Gugler

Proceedings of European Coating Symposium (ECS) 2021, 7-9 September 2021, Brussels, Belgium

Link zur Konferenz

Zusammenfassung:

This work presents a material screening study conducted while researching an 100% UV lacquer for an ink-jet coating application. In the first part of the study, spin-coating was used for creating a uniform coating of 7 μm over a metallic substrate. The uniformity and the defect-free characteristics of the coating were confirmed by FIB microscopy and by electrical tests, which were found to be a reliable tool for ensuring the preparation of defect-free coatings over metallic substrates. In the second part of the study, the manufacturing process was switched to ink-jet. The best jetting and UV curing parameters were found to ensure good wetting between consecutive coating layers while having sufficient curing. Although thicker coatings of about 20 μm/layer were produced using ink-jet, the defect-free characteristics were conserved up to 50 consecutive layers, confirming that thicker yet uniform coatings could be obtained by ink-jet. The new testing method was helpful during the material screening. Furthermore, we have shown that lacquer systems can be easily obtained by ink-jet printing and could be very useful for electrical engineering applications.

2019

Swiss ePrint
Konferenz

Filliger Sebastian

Swiss ePrint, 23.08.2019 - 25.09.2021, Fribourg

Link zur Konferenz

Zusammenfassung:

E-Printing is a key enabling technology that goes well beyond the established paper printing. In recent years, novel areas have matured, where printing techniques find increasingly a pathway from R&D to industrial manufacturing. These areas not only include organic and printed opto-electronics, but also micro-optical, bio-medical, MEMS fabrication and packaging, 3D rapid prototyping, flexible substrate and roll-to-roll technologies.

Switzerland already has many activities in the E-print field, and the Swiss e-Print conference will allow active professionals to identify potential complementary partnership in this upcoming manufacturing discipline that spans across several disciplines from tools, ink materials, surfaces, chemistry & physics, electronics and optics, among others.

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