General information
Organisation
The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas :
• defence and security,
• nuclear energy (fission and fusion),
• technological research for industry,
• fundamental research in the physical sciences and life sciences.
Drawing on its widely acknowledged expertise, and thanks to its 16000 technicians, engineers, researchers and staff, the CEA actively participates in collaborative projects with a large number of academic and industrial partners.
The CEA is established in ten centers spread throughout France
Reference
SL-DRT-24-0707
Direction
DRT
Thesis topic details
Category
Technological challenges
Thesis topics
Development of integrated GaN functions for electrical energy conversion
Contract
Thèse
Job description
The integration of GaN (Gallium Nitride) components in power applications requires
take into account the very fast switching speed of these transistors. Furthermore, if we wish
switching currents of the order of several tens of amperes it is essential to bring them as close as possible
the power element control circuit. This rapprochement can be done in two ways: integrating
the control chip and the power chip in the same package or integrate these two elements on the
same chip.
The best option being the second, it is then necessary to carry out logic functions in GaN
making it possible to design a control circuit which will be inserted between the output signals of a
microcontroller and the GaN power transistor(s).
This development will be based on technological bricks produced at Leti using grid components.
buried MIS (Metal, Insulator, Semiconductor) and will make it possible to promote this technology by showing its
advantages (Switching speed (a few nanoseconds), operation at temperatures
(higher than 150°C)) compared to the state of the art.
Firstly, after an in-depth bibliography on the subject, it will be asked to calibrate and use
models (Spice type) of active and passive components to simulate basic logical functions and
to assist in the complete digital design of the control circuit.
A second part will consist of drawing the set of masks, followed by manufacturing the circuit on
chip integrating the control function as well as the power transistors.
In the following, it will be asked to electrically characterize the circuit in an environment close to a
real application. This step will be followed by an improvement pass in order to make it more reliable and increase the
robustness of the circuit in a wide range of temperature and frequency.
University / doctoral school
Electronique, Electrotechnique, Automatique, Traitement du Signal (EEATS)
Université Grenoble Alpes
Thesis topic location
Site
Grenoble
Requester
Position start date
01/09/2024
Person to be contacted by the applicant
ESCOFFIER René rene.escoffier@cea.fr
CEA
DRT
CEA-LETI, 17 rue des martyrs,
F-38054 Grenoble
0438782425
Tutor / Responsible thesis director
ALLARD Bruno bruno.allard@insa-lyon.fr
Laboratoire Ampère
INSA Lyon, Département Génie Electrique
Ampere-lab, UMR CNRS 5005
Site de l’INSA de Lyon
Bât Saint Exupéry
25 Avenue Jean Capelle - Villeurbanne
04 72 43 87 26
En savoir plus
https://www.leti-cea.fr/cea-tech/leti/Lists/Postdocs/StructuredDisplayForm.aspx?ID=248
https://www.leti-cea.fr