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Carrie Natalia

Adjointe scientifique HES

Main skills

Adjointe scientifique HES

Phone: +41 26 429 69 17

Desktop: MIC_00_152

Haute école d'ingénierie et d'architecture de Fribourg
Boulevard de Pérolles 80, 1700 Fribourg, CH

Institute
iPrint - Institut de printing

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Completed

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

AGP

Role: Collaborator

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).

, , , , , , , , , , , , , , , , , , , , , , , , , Research team within 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; Gugler Gilbert, FR - EIA - Institut IPRINT

Durée du projet: 11.12.2018 - 01.02.2022

Statut: Completed

The Inkjet Training

AGP

Role: Collaborator

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.

Research team within 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: 20.01.2016 - 16.07.2019

Statut: Completed

2022

Inkjet printing :

Conference ArODES

a new technique for manufacturing solid insulation systems

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

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

Link to the conference

Summary:

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

Conference ArODES

Ioana Preda, Sebastian Filliger, Natalia Carrie, Gilbert Gugler

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

Link to the conference

Summary:

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.

Long distance jetting :

Conference ArODES

digital printing on non-planar shapes

Olivier Bürgy, Nicolas Muller, Natalia Carrie, Gilbert Gugler, Yoshinori Domae

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

Link to the conference

Summary:

The inkjet printing technology plays a major role in the digital printing field. Having the possibility to digitally and selectively print or coat areas offers a great advantage. Usually inkjet was limited to flat substrates but nowadays with modern printheads and advanced waveform tuning, it is possible to extend the jetting distance and print on non-planar shapes. This paper will compare different printheads and the strategies used to increase the jetting distance.

2019

Distant jetting for direct-to-shape printing

Conference

Carrie Natalia

The Inkjet Conference, 29.10.2019 - 30.10.2019, Düsseldorf

Link to the conference

Summary:

The jetting distance is an important parameter for many different applications including direct-to-shape printing. The presented study shows the methodology to determine the maximum possible distance between the printhead and the substrate that still provides the required quality for graphical images on shaped surfaces. The applied method is shown with the example of printed 3D puzzle pieces with the goal to validate the printing process with stability and printing quality tests. First, the different printheads are evaluated with a list of criteria to fulfil in order to increase the jetting distance. The key parameters include drop size, drop velocity and printhead reliability. Then, the printing strategy is elaborated and tried on a few printheads to achieve a final acceptable result. The technical route is to maximise the speed with the creation of small drops. As the stability of the drop is better with a bigger volume, multi-pulses have been used to create multi-drops that will merge and increase the volume. This strategy uses the long distance jetting requirement as an advantage. Finally, the waveform to eject the drops is optimised and accepted using the stability tests. The position of the drop is measured multiple times and the average and standard deviation determine the jet straightness. The final look of the printed pattern is evaluated with the microscope to validate the waveform and printing process.

Achievements

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Carrie Natalia

Adjointe scientifique HES

Main skills

Inkjet

Printed electronics

Graphical printing

Dropwatching

Surface treatment

Adjointe scientifique HES