{"id":76653,"date":"2025-12-22T11:32:39","date_gmt":"2025-12-22T09:32:39","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=76653"},"modified":"2025-12-22T11:32:39","modified_gmt":"2025-12-22T09:32:39","slug":"amir-al-abdallah-these","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/a-la-une\/amir-al-abdallah-these.html","title":{"rendered":"Amir  Al Abdallah &#8211; 10\/12\/2025 &#8211; \u00ab \u00c9tude de la diode Schottky GaN \u00e0 base de m\u00e9taux r\u00e9fractaires pour les applications spatiales \u00e0 haute temp\u00e9rature et haute fr\u00e9quence \u00bb"},"content":{"rendered":"<div id='layer_slider_1'  class='avia-layerslider main_color avia-shadow  avia-builder-el-0  el_before_av_heading  avia-builder-el-first  container_wrap sidebar_right'  style='height: 261px;'  ><div id=\"layerslider_58_1wui1n5g4om3n\" data-ls-slug=\"homepageslider\" class=\"ls-wp-container fitvidsignore ls-selectable\" style=\"width:1140px;height:260px;margin:0 auto;margin-bottom: 0px;\"><div class=\"ls-slide\" data-ls=\"duration:6000;transition2d:5;\"><img loading=\"lazy\" decoding=\"async\" width=\"2600\" height=\"270\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg\" class=\"ls-bg\" alt=\"\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg 2600w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-300x31.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-768x80.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1030x107.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1500x156.jpg 1500w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-705x73.jpg 705w\" sizes=\"auto, (max-width: 2600px) 100vw, 2600px\" \/><ls-layer style=\"font-size:14px;text-align:left;font-style:normal;text-decoration:none;text-transform:none;font-weight:700;letter-spacing:0px;border-style:solid;border-color:#000;background-position:0% 0%;background-repeat:no-repeat;width:180px;height:30px;left:0px;top:231px;line-height:32px;color:#ffffff;border-radius:6px 6px 6px 6px;padding-left:50px;background-color:rgba(0, 0, 0, 0.57);\" class=\"ls-l ls-ib-icon ls-text-layer\" data-ls=\"minfontsize:0;minmobilefontsize:0;\"><i class=\"fa fa-quote-right\" style=\"color:#ffffff;margin-right:0.8em;font-size:1em;transform:translateY( -0.125em );\"><\/i>ACTUALITES<\/ls-layer><\/div><\/div><\/div><div id='after_layer_slider_1'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-76653'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mih9a83v-2f232f0af808072a46c92f1a8d85bda5\">\n#top .av-special-heading.av-mih9a83v-2f232f0af808072a46c92f1a8d85bda5{\nmargin:0 0 10px 0;\npadding-bottom:4px;\ncolor:#e58302;\n}\nbody .av-special-heading.av-mih9a83v-2f232f0af808072a46c92f1a8d85bda5 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-mih9a83v-2f232f0af808072a46c92f1a8d85bda5 .special-heading-inner-border{\nborder-color:#e58302;\n}\n.av-special-heading.av-mih9a83v-2f232f0af808072a46c92f1a8d85bda5 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-mih9a83v-2f232f0af808072a46c92f1a8d85bda5 av-special-heading-h2 custom-color-heading  avia-builder-el-1  el_after_av_layerslider  el_before_av_hr  avia-builder-el-first  av-linked-heading'><h2 class='av-special-heading-tag'  itemprop=\"headline\"  >THESE : Amir Al Abdallah &#8211; \u00ab \u00c9tude de la diode Schottky GaN \u00e0 base de m\u00e9taux r\u00e9fractaires pour les applications spatiales \u00e0 haute temp\u00e9rature et haute fr\u00e9quence \u00bb<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-18u73nj-dad6a947580930e400fc42ba200e80f1\">\n#top .hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1{\nmargin-top:5px;\nmargin-bottom:5px;\n}\n.hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1 .hr-inner{\nwidth:100%;\n}\n<\/style>\n<div  class='hr av-18u73nj-dad6a947580930e400fc42ba200e80f1 hr-custom  avia-builder-el-2  el_after_av_heading  el_before_av_textblock  hr-left hr-icon-no'><span class='hr-inner inner-border-av-border-thin'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<section  class='av_textblock_section av-jriy64i8-fd5f2e9d63bf552d6910d12f255eb26e'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" >\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-13ewzjw-649e41ac67c26b53aa0b3d91d18e5f5a\">\n.av_font_icon.av-13ewzjw-649e41ac67c26b53aa0b3d91d18e5f5a{\ncolor:#e58302;\nborder-color:#e58302;\n}\n.av_font_icon.av-13ewzjw-649e41ac67c26b53aa0b3d91d18e5f5a .av-icon-char{\nfont-size:60px;\nline-height:60px;\n}\n<\/style>\n<span  class='av_font_icon av-13ewzjw-649e41ac67c26b53aa0b3d91d18e5f5a avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue8c9' data-av_iconfont='entypo-fontello' ><\/span><\/span>\n<h4><span style=\"color: #ff9900;\"><strong>Amir Al Abdallah<\/strong><\/span><\/h4>\n<p><strong>Vendredi 10 d\u00e9cembre 2025 \u00e0 14h00<br \/>\n<\/strong>Amphith\u00e9\u00e2tre LCI<\/p>\n<\/div><\/section>\n<section  class='av_textblock_section av-jtefqx33-26fa44c544b10063385818eda37e027b'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><div  class='hr av-kjh3zw-4dff888f744b728a1aca9b3a0971493a hr-default  avia-builder-el-6  avia-builder-el-no-sibling'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<h5><strong><span style=\"color: #800000;\">Jury :<\/span><\/strong><\/h5>\n<p>Rapporteur : Dominique Planson, Professeur des universit\u00e9s, INSA Lyon \u2013 Laboratoire Amp\u00e8re<br \/>\nRapporteur : Kevin Nadaud, Ma\u00eetre de conf\u00e9rences, Universit\u00e9 de Tours \u2013 GREMAN<br \/>\nExaminatrice : Jeanne Treuttel, Ing\u00e9nieur de recherche CNRS, Observatoire de Paris \u2013 LERMA<br \/>\nExaminatrice : Camille Sonneville, Ma\u00eetre de conf\u00e9rences, INSA Lyon \u2013 Laboratoire Amp\u00e8re<br \/>\nExaminateur : Guillaume Ducournau, Professeur, Universit\u00e9 de Lille \u2013 IEMN<br \/>\nExaminateur : Tuami Lasri, Professeur, Universit\u00e9 de Lille \u2013 IEMN<br \/>\nExaminateur : Abdelaziz Hamdoun, Ma\u00eetre de conf\u00e9rences, Universit\u00e9 de Poitiers \u2013 XLIM<br \/>\nCo-encadrant de th\u00e8se : Malek Zegaoui, Ing\u00e9nieur de recherche CNRS \u2013 IRCICA<br \/>\nDirecteur de th\u00e8se : Mohammed Zaknoune, Directeur de recherche CNRS \u2013 IEMN<\/p>\n<h5><span style=\"color: #800000;\">Summary:<\/span><\/h5>\n<p>Les exigences croissantes en \u00e9lectronique haute temp\u00e9rature, motiv\u00e9es par des applications telles que le forage profond, l\u2019a\u00e9ronautique hypersonique ou encore l\u2019exploration spatiale, n\u00e9cessitent des dispositifs capables de fonctionner au-del\u00e0 des limites thermiques des technologies silicium classiques. Dans le contexte particulier de l\u2019exploration de V\u00e9nus, les instruments doivent \u00eatre op\u00e9rationnels \u00e0 des temp\u00e9ratures pouvant atteindre 460 \u00b0C.<br \/>\nDans ce cadre, la technologie GaN (nitrure de gallium) appara\u00eet comme une solution prometteuse gr\u00e2ce \u00e0 sa capacit\u00e9 \u00e0 fonctionner efficacement \u00e0 haute temp\u00e9rature sans recourir \u00e0 un refroidissement actif.<br \/>\nCette th\u00e8se s\u2019inscrit dans la conception d\u2019un radiom\u00e8tre haute temp\u00e9rature destin\u00e9 \u00e0 la d\u00e9tection de vapeur d\u2019eau dans l\u2019atmosph\u00e8re de V\u00e9nus. Elle se concentre sur l\u2019utilisation de la diode Schottky GaN comme composant cl\u00e9 pour la multiplication de fr\u00e9quence dans les circuits h\u00e9t\u00e9rodynes.<br \/>\nLes travaux portent ainsi sur l\u2019optimisation technologique et thermique de cette diode afin d\u2019en garantir le fonctionnement dans des environnements extr\u00eames.<br \/>\nUne approche it\u00e9rative combinant conception, fabrication et caract\u00e9risation a \u00e9t\u00e9 adopt\u00e9e, en mettant en avant l\u2019usage de m\u00e9taux r\u00e9fractaires tels que le molybd\u00e8ne et le tungst\u00e8ne. Ces m\u00e9taux permettent le maintien des performances des dispositifs apr\u00e8s des recuits allant jusqu\u2019\u00e0 1000 \u00b0C, et leur caract\u00e9risation in situ jusqu\u2019\u00e0 300 \u00b0C.<br \/>\nDes \u00e9tudes approfondies de traitements de surface ont \u00e9galement \u00e9t\u00e9 men\u00e9es afin d\u2019affiner les proc\u00e9d\u00e9s de fabrication.<br \/>\nLes r\u00e9sultats obtenus ouvrent la voie vers le d\u00e9veloppement de diodes submicroniques pour la multiplication de fr\u00e9quence en gamme THz ainsi que vers des plateformes GaN d\u00e9di\u00e9es \u00e0 l\u2019\u00e9lectronique spatiale.<\/p>\n<h5><span style=\"color: #800000;\">Abstract:<\/span><\/h5>\n<p>The growing demand for high-temperature electronics, driven by applications such as deep-well drilling, hypersonic aerospace systems, and space exploration, requires the development of devices capable of operating beyond the thermal limits of traditional silicon-based technologies. In the particular context of Venus exploration, electronic systems are expected to function at temperatures reaching up to 460 \u00b0C. In this framework, gallium nitride (GaN) technology stands out for its potential to operate efficiently at high temperatures without the need for external cooling systems. This work focuses on the design of a high-temperature radiometer intended for the detection of water vapor in the Venusian atmosphere, relying on GaN Schottky diodes for frequency multiplication in heterodyne receivers. The study addresses the technological and thermal optimization of this diode to ensure reliable operation under extreme conditions. The adopted scientific approach follows an iterative process of design, fabrication, and characterization of devices, exploring new metallic architectures that integrate refractory metals such as Molybdenum and Tungsten. These metals enable device functionality after annealing up to 1000 \u00b0C and in situ electrical measurements up to 300 \u00b0C. Advanced surface treatment studies are also carried out to refine the understanding and control of fabrication processes. The results open promising perspectives toward submicron Schottky diodes for frequency multiplication in Thz range and GaN platforms dedicated to space electronics.<\/p>\n<\/div><\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":20,"featured_media":71083,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,8,199],"tags":[],"class_list":["post-76653","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-a-la-une","category-actualites","category-these"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/76653","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=76653"}],"version-history":[{"count":2,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/76653\/revisions"}],"predecessor-version":[{"id":76655,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/76653\/revisions\/76655"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media\/71083"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=76653"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=76653"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=76653"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}