PhD Defense of Camille DELFAUT

Keywords  :  
direct writing,MID,radiofrequency,printed electroni

Abstract :
The MINT chair (innovating for molded & printed electronics) is an Excellency scientific chair supported by the Fondation Partenariale Grenoble INP and sponsored by Schneider Electric. Through MINT chair, Schneider teams up with two research laboratories, the LGP2 and the IMEP-LaHC, to develop electronic features on 3D shaped thermoplastics. The MINT chair gave rise to the thesis: « Printed integration of electronic capabilities on 2D and 3D thermoplastic for radiofrequency implementations »
 This thesis goals are the implementation, characterization and optimization of the jetting impression process on 2D and 3D thermoplastic. Moreover, the performances of this process must be assessed in order to define its strengths and limits in a radiofrequency usage. Finally, the process capabilities were showcased by printing prototypes
 To this end, this dissertation is split into three successive chapters. Firstly, the state of the art of the plastronic field, carried out through literature review on plastronic processes and their current implementations, is presented. Plastronic technologies are examined and a classification amongst well-known 3D additive manufacturing technologies is proposed. Prototypes made with plastronic technologies are displayed for each concerned field. Secondly, the electrical and geometric characterization as well as the implementation of the jetting process is presented. Printing parameters are studied and optimized to determine a resilient printing process and printing optimization strategies are set up. Finally, jetting process printouts radiofrequency capabilities are assessed through characterization of 2D and 3D coplanar transmission lines. 2D coplanar transmission lines are simulated and printed. The printing process is optimized by printing meshed ground planes. Coplanar lines are printed on 3D substrates having 90- and 130-degrees angles, then measured. Some radiofrequency implementations are examined: a LoRa antenna, a RFID tag and a 5G antenna radome.

Jury members :

• Nadège REVERDY-BRUAS, ASSOCIATE PROFESSOR HDR ,  Grenoble INP : Supervisor
• Fabien FERRERO,  PROFESSOR of UNIVERSITIES, Côte d'Azur University : Reviewer
•  Philippe PASSERAUB, PROFESSOR ASSOCIE, Geneva University : Examiner
•  Mohamed SAADAOUI, ASSOCIATE PROFESSOR, Ecole des Mines de Saint-Etienne : Examiner
• Naceur BELGACEM, PROFESSOR of UNIVERSITIES, Grenoble INP : Examiner
• Henri HAPPY, PROFESSOR of UNIVERSITIES, Lille University : Reviewer