General information
Offer title : Postdoc (M/F) in Development of plasma etching processes for the fabrication of a new high-efficiency betavoltaic source architecture (H/F)
Reference : UMR5129-ERWPAR-009
Number of position : 1
Workplace : GRENOBLE
Date of publication : 17 February 2025
Type of Contract : Researcher in FTC
Contract Period : 12 months
Expected date of employment : 1 June 2025
Proportion of work : Full Time
Remuneration : between 2991€ and 3417€
Desired level of education : Doctorate
Experience required : 1 to 4 years
Section(s) CN : 08 - Micro and nanotechnologies, micro and nanosystems, photonics, electronics, electromagnetism, electrical energy
Missions
This work is part of the AAPG 2023 ANR NOBEL project, which brings together 4 partners: LTM/CNRS, pheliqs/CEA, Institut Néel/CNRS and CREAH/CNRS. The aim of the project is to fabricate betavoltaic sources using a new core-shell wire architecture that will overcome the yield limitations of existing planar betavoltaic sources. The aim of the postdoc is to pattern high aspect ratio GaN and AlGaN nanowires using a top-down approach, as this stage is key to integration. These wires will then be used by the project partners, who will carry out the following technological stages in the manufacture of the betavoltaic source.
Activities
The work will be carried out on LTM's 200mm and 300mm etching reactors located in CEA/Leti's clean rooms.
1) - Develop plasma etching processes of high aspect ratio GaN and AlGaN nanowires
2) Develop KOH-based wet treatments to restore the surfaces of etched wires
3) Characterise the processes morphologically (SEM, FIB-STEM, AFM), chemically (XPS) and optically (cathodoluminescence).
4) Valorisation of results in the form of articles or conference papers.
Skills
---1)Theoretical knowledge: plasma etching mechanisms, semiconductor physics, III-N, materials science
2) Technical skills:
-Plasma etching processes,
-Plasma diagnostics (mass spectrometer, flux probe, etc.), -Physicochemical characterisation of materials (ellipsometry, XPS, FTIR, etc.)
-Optical characterisation by cathodoluminescence
3) Skills in promoting results by writing articles or presenting at conferences
4) Other skills: written/spoken English, knowledge of Matlab programming
Work Context
This work will be carried out at the Microelectronics Technologies Laboratory (LTM), a joint research unit of the CNRS and the Grenoble Alpes University (UGA) (UMR 5129) located on the CEA-LETI-MINATEC site in Grenoble. A hundred people work at the LTM: 30 researchers or teacher-researchers, 18 engineers and technicians, 31 doctoral students and 16 post-doc. The laboratory's activities are positioned on the border between upstream academic research and industrial research. Over the years, the LTM has developed several direct partnerships with various players in the micro / nanoelectronics industry, notably STMicroelectronics in Crolles and Applied Materials in SAnta Clara (USA). The candidate will join the LTM's PROSPECT department. This department aims to develop innovative processes and materials for nano and opto electronics applications.
Constraints and risks
clean room