Literatura científica selecionada sobre o tema "Dépôt de couches atomiques (ALD)"
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Artigos de revistas sobre o assunto "Dépôt de couches atomiques (ALD)"
Mantoux, A., J. C. Badot, N. Baffier, J. Farcy, J. P. Pereira-Ramos, D. Lincot e H. Groult. "Propriétés structurales et électrochimiques de couches minces de V2O5élaborées par dépôt chimique de couches atomiques en phase vapeur (ALCVD)". Journal de Physique IV (Proceedings) 12, n.º 2 (abril de 2002): 111–19. http://dx.doi.org/10.1051/jp420020018.
Texto completo da fonteMennad, Abdelkader. "Les techniques de dépôt de couches minces et leurs applications". Journal of Renewable Energies 18, n.º 4 (18 de outubro de 2023): 713–19. http://dx.doi.org/10.54966/jreen.v18i4.541.
Texto completo da fonteTeses / dissertações sobre o assunto "Dépôt de couches atomiques (ALD)"
Létiche, Manon. "Élaboration de matériaux pour microbatterie 3D Li-ion par dépôt de couches atomiques (ALD) et caractérisations structurales operando". Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10183/document.
Texto completo da fonteIn order to address the demand on energetic needs to sustain nomad and miniaturized electronic devices, micro-devices performance for energy storage such as Li-ion microbatteries (MB) have to be improved. An attractive way to meet the required performance consists in using 3D topology increasing the specific surface while keeping the initial surface footprint (in the mm2 range) which is significantly enhancing the delivered energy density of the MB. The development of thin film technologies such as ALD enabling conformal deposition makes it possible. In the framework of this thesis, a solid electrolyte (Li3PO4) has been developed and optimized by ALD, on a 3D micro-architectured silicon substrate obtained by microfabrication techniques. A positive electrode (LiMn1.5Ni0.5O4) has also been developed and optimized as a function of the deposition parameter by RF sputtering deposition on a Si/Al2O3/Pt substrate. A volumetric capacity of 63 µAh.cm-2.µm-1 has been measured for a film of 420 nm thick obtained at 0.01 mbar and then annealed at 700°C under air atmosphere. Finally, a prototype has been proposed to realize an electrochemical cell for the purpose of in situ/operando follow-up by XRD of a thin film electrode deposited on silicon substrate
Chen, Yuan. "Elaboration de films minces thermoélectriques par dépôt électrochimique en couches atomiques (EC-ALE)". Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4342.
Texto completo da fonteAn electrochemical atomic layer epitaxy (EC-ALE) experiment platform was designed and constructed in this thesis, and this platform was proved to be qualified for EC-ALE experiments.Benefiting from the flexibility of the EC-ALE equipment, a new viewpoint about the UPD behavior of cobalt on the gold substrate has been put forward in this work. The results also show that the subsequent alternate deposition of Co and Sb monolayers is feasible.For the first time the electrodeposition of Sb2Se3 thin films by EC-ALE method on polycrystalline Au electrodes has been obtained and investigated. The deposition parameters were determined and the deposit was characterized by SEM and Raman analysis.The irreversible adsorption and reversible UPD behaviour of Sb on Pt electrode have also been studied. The results show that after the irreversibly adsorbed SbO+ species are reduced to metallic Sb, Sb atoms can be further deposited onto this Sb-modified Pt electrode in the way of UPD to increase the coverage of Sb on the Pt substrate
Masse, de la Huerta César Arturo. "Développement de la technique dépôt par couche atomique spatiale (SALD) pour la fabrication de couches minces type P d'oxyde de cuivre (I) conductrices". Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAI067.
Texto completo da fonteTo successfully design the instrumentation needed for new manufacturing technologies with nanoscale precision, the design methodology must take into account many different topics related to chemistry, physics, mechanics, electronics and automation, working together to achieve the desired goal. In this thesis, this design methodology has been implemented with a large number of tools and approaches to successfully optimize a nanofabrication method called spatial atomic layer deposition (SALD) in order to deposit thin films. a potentially useful material as a component of non-silicon solar energy devices, photoelectrochemical water separators and transparent thin-film electronic components, among others: cuprous oxide (Cu2O).With respect to manufacturing technology and mechatronics design, SALD is a promising manufacturing technique that enables the fabrication of thin films with nanoscale precision and the ability to control their mechanical, electrical and crystallographic properties. In addition, the SALD approach used in this thesis and in the Laboratoire des Matèriaux et du Génie Physique(LMGP) works in the open air (without a repository) and is therefore potentially an industry-compatible approach to film Thin homogeneous high-area manufacturing with high throughput. In addition, SALD can be used under conditions that make it compatible with flexible substrates and roll-to-roll approaches (R2R). Finally, SALD offers flexibility on the deposit process so that it can be adjusted to obtain different properties on films manufactured with a minimum of instrumentation modification.Using CFD (Computational Fluid Dynamics) simulations, the fluid mechanics phenomena that occur during the deposition process in the SALD system were analyzed for different reactor configurations. The influence on the properties of the film was studied and a validation with experimental deposits was carried out. Then, using the knowledge and guidance obtained with CFD simulations, and to reduce the cost and complexity of modifying certain mechanical components of the system, a workflow that includes computer-aided design (CAD) and manufacturing additive (also called 3D printing) printing) was set up at the LMGP for the manufacture of one of the main components of the LMGP SALD system: the deposit head. Here, it is the first time that such an innovative manufacturing technique has been applied to thin-film nanofabrication processes, offering many potential applications in the field. In this thesis, such a workflow is presented and explained, along with learned guidelines and discovered limitations also presented.Finally, thin layers of Cu2O have been successfully deposited with the SALD method. Cu2O is one of the few materials with promising electronic properties as a p-type transparent semiconductor. Here, Cu2O films made using the LMGP SALD system are reported and their p-type conductivity and crystallography are analyzed.The results of this work provide initial guidance for the industrial design of a high throughput manufacturing system based on SALD technology optimized for each desired material. This design approach also makes this work useful for increasing the amount of SALD compatible materials, as well as for further developing the SALD methodology in innovative materials and device manufacturing processes
Pawlik, Matthieu. "Etude de la passivation de surface du silicium cristallin type P par dépôt de couches atomiques d'alumine pour application aux cellules solaires à haut rendement". Thesis, Ecole centrale de Lille, 2015. http://www.theses.fr/2015ECLI0008/document.
Texto completo da fonteThe decrease of solar cell cost as well as the increase in their efficiency are main research topics since the photovoltaic market crisis in 2011. One of the main strategy is to move towards thinner solar cells, in order to decrease raw material consumption. However, the result is a higher impact of surface phenomena on cell characteristics because of a high influence of structure and electronic defects at the surface. These defects can be passivated by Al2O3 coated by PE-ALD (Plasma Enhanced-Atomic Layer Deposition) which has been shown to provide the best surface passivation on p-type silicon. In an as-deposited state, the passivation level of Al2O3 is very low and required an annealing treatment to be "activated". This phenomenon provides an increase of the minority carrier effective lifetime. This thesis founded by the ANR PROTERRA and BIFASOL projects with the financial support of the Ecole Centrale de Lille, focuses on the optimization of the deposition parameters of alumina with a deeper insight on the passivation activation phenomena on samples with and without emitter. The passivation analysis has been performed thanks to coupled lifetime (QSS and micro PCD), surface potential (Kelvin probe), electrical (C-V) and chemical (SIMS, XPS) characterizations. The origin of the chemical and field effect passivation has been determined within the Si/SiO2/Al2O3 stack. The dynamics of the hydrogen contained in bulk alumina is explained. The impact of a SiNx capping layer and a contact alloying anneal at 830°c for 3s is also investigated
Fraccaroli, Mathias. "Synthèse par CVD/ALD sur grandes surfaces d'un sulfure de vanadium transparent et conducteur". Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALT006.
Texto completo da fonteIn the context of functional diversification (“More than Moore”), transition sulfides are currently being actively studied for original optical devices production. Some materials in this family have a lamellar structure, similar to graphene like vanadium sulfides. The synthesis of these lamellar films remains actively dominated by high-temperature CVD processes (> 550 ° C). However, in order to hope the development of a reliable synthesis methods, it's important to reduce this deposition temperature which leads to a poor uniformity and a poor conformity. In this work we have studied the potential of a chemical vapor deposition approach at low temperature (200 ° C). This method allow us to obtain an amorphous vanadium sulfide film on a 300 mm wafer and point out theirability to self-reorganize in order to obtain a lamellar film of V7S8 after thermal annealing. A 5.2nm film has interesting optical and electrical properties; this film is conductive with a carrier density of 1.1.1023 cm-3, the holes are the main charges carriers (type p), a mobility of 0.2 cm2. (Vs) -1, a conductivity of 1063 S.cm -1, an output work of 4.8 eV while preserving good transparency (transmittance of 75% for a wavelength of 550nm)
Garcia, Ramirez Emmanuel Armando. "Etude et optimisation de matériaux diélectriques et électrodes déposés par ALD pour structures nano-poreuses". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMC226.
Texto completo da fonteThis research investigates the use of hafnium oxide (HfO2)-based thin films in nanocapacitors, focusing on both their linear and non-linear electrical properties to meet the growing demands of high-performance and miniaturized electronic devices. Starting with the fundamental physics of energy storage capacitors, the investigation highlights the essential characteristics of effective dielectric materials, such as a high dielectric constant and a substantial band gap. Hafnium-based materials are particularly promising due to their compatibility with Atomic Layer Deposition (ALD), which allows for precise and uniform thin-film deposition—crucial for ensuring reliable performance in electronic devices.To understand the potential of these materials, various fabrication and characterization techniques were employed. This includes specific deposition processes to create the thin films and morphological tests to study the physical structure of the capacitors. Electrical testing plays a key role in evaluating critical parameters like dielectric constant, breakdown voltage, and overall energy storage capacity. By analyzing these factors, a comprehensive view of how both linear and non-linear hafnium-based dielectrics perform is provided.When exploring linear, amorphous hafnium-based dielectrics, HfO2 is combined with aluminum oxide and silicon dioxide to enhance dielectric properties. Different configurations, such as nanolaminates and solid solutions, are tested to find the optimal balance. The goal is to achieve materials that maintain a high dielectric constant and resist voltage breakdown, thereby improving their ability to store energy efficiently. On the other hand, a detailed look into non-linear, crystalline dielectrics examines the effects of doping hafnium oxide with elements like zirconia and silicon. Different deposition and annealing temperatures are assessed for their impact on crystalline structure and polarization behavior, revealing complex ferroelectric and antiferroelectric behaviors that could offer high energy density and stability.The findings suggest that while ferroelectric materials might not be suitable for applications requiring linear capacitance due to their sensitivity to voltage variations, antiferroelectric materials show promise. However, they still face challenges related to electrical efficiency and thermal management. Finding materials that can effectively stabilize voltage variations is crucial, as capacitors are increasingly used to manage these fluctuations in modern electronics.A significant challenge identified is the variability in the dielectric constant, which can limit the use of these materials in applications demanding stable capacitance, such as signal filtering. To address this issue, solid solutions and laminated materials, which provide consistent linear capacitance, are prioritized. Although these materials are effective up to a certain permittivity threshold, exploring non-linear phases opens the door to potentially higher performance under specific conditions.In summary, understanding of HfO2-based thin films and their role in nanocapacitors is advanced by this research. By examining both linear and non-linear dielectric materials, insights into how to optimize fabrication techniques and material compositions to improve dielectric properties are provided. Ongoing research into issues like material endurance, electrical efficiency, and thermal management is essential for developing reliable and high-performing capacitors that meet the evolving demands of modern electronic technologies
Benamira, Messaoud. "Conducteurs mixtes nanostructurés pour les piles à combustible à oxyde solide (SOFC) : élaboration et performances de nouvelles architectures". Phd thesis, Paris 6, 2008. http://pastel.archives-ouvertes.fr/pastel-00004896.
Texto completo da fonteMantoux, Arnaud. "Synthèse par dépôt de couches atomiques et caractérisations de couches minces d'oxyde de vanadium applications aux accumulateurs au lithium". Paris 6, 2003. http://www.theses.fr/2003PA066206.
Texto completo da fonteBarbos, Corina. "Passivation de surface des cellules photovoltaïques en silicium cristallin : Dépôt par ALD et caractérisation de couches minces d’Al2O3". Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI149/document.
Texto completo da fonteThe reduction of recombination at the surfaces of solar cells is a fundamental challenge for the photovoltaic industry. Passivation of surface electrical defects can be achieved by the formation of chemical bonds or by the supply of electric charges capable of repelling a type of carrier. These effects can be obtained by means of functionalized thin layers deposited on the surfaces of the materials which constitute the cells. In this thesis we studied the surface passivation of silicon by thin layers of Al2O3 deposited by ALD. The physical, optical, structural and chemical characterization of the deposited layers was carried out. An optimization of the preparation process (pre-deposition cleaning, deposition and annealing parameters) of alumina layers was necessary to meet the requirements of reduction of surface recombinations and to obtain optimized passivation results. Finally, various technological bricks necessary for the integration of these layers in the architecture of a silicon solar cell have been studied and developed
Lemenager, Maxime. "Atomic Layer Deposition of thin dielectric films for high density and high reliability integrated capacitors". Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI085.
Texto completo da fonteEnergy storage in embedded systems is still the subject of major R&D efforts as it requires a constant decrease in the volume of electronic components. It appears that the size of the discrete components, such as capacitors, is one of the brakes to the miniaturization of the final devices. Although technologies mainly based on silicon deep etching at the micrometric scale have made considerable progresses, they are now limited in terms of integration density. As a result, Murata IPS is developing a new 3D technology enabling a higher developed surface area. The use of such a matrix requires a MIM stack deposition technique such as ALD which is adapted to high aspect ratios. The aim of this thesis has been thus to integrate the MIM structure into the new 3D matrix while respecting the constraints inherent to the industry in order to give rise to the fifth generation of PICS™ technologies. The first challenge has been the achievement of sufficient step coverage of the films with an industrial equipment. A capacitance density greater than 1µF/mm² using a 10nm alumina film has been demonstrated. It also turns out that the TiN electrodes integration plays an important role on the 3D structure. Indeed, the mechanical stress had to be reduced to ensure the mechanical robustness of the structure, in particular by playing on the NH3 pulse. The metal-dielectric interfaces have also been the subject of an in-depth study where the influence of TiN oxidation during dielectric deposition has been shown and electrically characterized. This study has then led to the integration of an additional barrier material at the interfaces, producing capacitors with a 10-year lifetime under the intended voltage and temperature conditions