{"id":457510,"date":"2024-08-05T10:14:39","date_gmt":"2024-08-05T08:14:39","guid":{"rendered":"https:\/\/www.eenewseurope.com\/?p=457510"},"modified":"2024-08-05T10:14:39","modified_gmt":"2024-08-05T08:14:39","slug":"record-mondial-pour-la-radiographie-x-dune-puce-3d","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/record-mondial-pour-la-radiographie-x-dune-puce-3d\/","title":{"rendered":"Record mondial pour la radiographie X d&rsquo;une puce 3D"},"content":{"rendered":"<h3>Des chercheurs suisses ont atteint une r\u00e9solution record de 4 nm pour une radiographie 3D d&rsquo;un processeur AMD.<\/h3>\n<p>L&rsquo;\u00e9quipe de l&rsquo;Institut Paul Scherrer (PSI) a utilis\u00e9 les rayons X de la Source de Lumi\u00e8re Suisse SLS du PSI. Au lieu d&rsquo;utiliser des lentilles, l&rsquo;\u00e9quipe a eu recours \u00e0 une technique appel\u00e9e ptychographie, qui consiste \u00e0 combiner de nombreuses images individuelles pour cr\u00e9er une seule image \u00e0 haute r\u00e9solution.<\/p>\n<p>L&rsquo;\u00e9quipe a travaill\u00e9 avec l&rsquo;EPFL de Lausanne, l&rsquo;ETH de Zurich et l&rsquo;Universit\u00e9 de Californie du Sud sur les images radiographiques avec des temps d&rsquo;exposition plus courts et un algorithme optimis\u00e9.<\/p>\n<p>Les microscopes \u00e9lectroniques \u00e0 balayage ont une r\u00e9solution de quelques nanom\u00e8tres et sont donc bien adapt\u00e9s \u00e0 l&rsquo;imagerie des minuscules transistors et des interconnexions m\u00e9talliques qui composent les circuits, mais ils ne peuvent produire que des images bidimensionnelles de la surface.<\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"Pvj0aIt8kB\"><p><a href=\"https:\/\/www.eenewseurope.com\/en\/ai-improves-3d-x-ray-imaging-for-package-failure-analysis\/\">AI improves 3D X-ray imaging for package failure analysis<\/a><\/p><\/blockquote>\n<p><iframe class=\"wp-embedded-content lazyload\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;AI improves 3D X-ray imaging for package failure analysis&#8221; &#8212; eeNews Europe\" data-src=\"https:\/\/www.eenewseurope.com\/en\/ai-improves-3d-x-ray-imaging-for-package-failure-analysis\/embed\/#?secret=IHsmBZCn60#?secret=Pvj0aIt8kB\" data-secret=\"Pvj0aIt8kB\" width=\"500\" height=\"282\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" data-load-mode=\"1\"><\/iframe><\/p>\n<p>\u00ab\u00a0Les \u00e9lectrons ne vont pas assez loin dans le mat\u00e9riau\u00a0\u00bb, explique Mirko Holler, physicien \u00e0 la SLS. \u00ab\u00a0Pour construire des images tridimensionnelles avec cette technique, la puce doit \u00eatre examin\u00e9e couche par couche, en retirant des couches individuelles au niveau du nanom\u00e8tre &#8211; un processus tr\u00e8s complexe et d\u00e9licat qui d\u00e9truit \u00e9galement la puce.<\/p>\n<p>La tomographie \u00e0 rayons X permet toutefois d&rsquo;obtenir des images tridimensionnelles et non destructives, car les rayons X p\u00e9n\u00e8trent beaucoup plus loin dans les mat\u00e9riaux. Cette proc\u00e9dure est similaire \u00e0 un scanner dans un h\u00f4pital. L&rsquo;\u00e9chantillon est tourn\u00e9 et radiographi\u00e9 sous diff\u00e9rents angles. La mani\u00e8re dont le rayonnement est absorb\u00e9 et diffus\u00e9 varie en fonction de la structure interne de l&rsquo;\u00e9chantillon. Un d\u00e9tecteur enregistre la lumi\u00e8re qui quitte l&rsquo;\u00e9chantillon et un algorithme reconstruit l&rsquo;image 3D finale \u00e0 partir de cette lumi\u00e8re.<\/p>\n<ul>\n<li><a href=\"https:\/\/www.eenewseurope.com\/en\/china-trade-war-drives-finnish-x-ray-plant-expansion\/\">La guerre commerciale stimule l&rsquo;expansion de l&rsquo;usine finlandaise de rayons X<\/a><\/li>\n<\/ul>\n<p>\u00ab\u00a0Ici, nous avons un probl\u00e8me de r\u00e9solution\u00a0\u00bb, a d\u00e9clar\u00e9 M. Holler. \u00ab\u00a0Aucune des lentilles \u00e0 rayons X actuellement disponibles ne peut focaliser ce rayonnement d&rsquo;une mani\u00e8re qui permette de r\u00e9soudre des structures aussi minuscules. Notre \u00e9chantillon est d\u00e9plac\u00e9 de mani\u00e8re \u00e0 ce que le faisceau suive une grille pr\u00e9cis\u00e9ment d\u00e9finie, comme un tamis. \u00c0 chaque point de la grille, une figure de diffraction est enregistr\u00e9e\u00a0\u00bb.<\/p>\n<p>La distance entre les diff\u00e9rents points de la grille est inf\u00e9rieure au diam\u00e8tre du faisceau, de sorte que les zones imag\u00e9es se chevauchent. Cela produit suffisamment d&rsquo;informations pour reconstruire l&rsquo;image de l&rsquo;\u00e9chantillon \u00e0 une haute r\u00e9solution \u00e0 l&rsquo;aide d&rsquo;un algorithme. Le processus de reconstruction s&rsquo;apparente \u00e0 l&rsquo;utilisation d&rsquo;une lentille virtuelle.<\/p>\n<p>L&rsquo;\u00e9chantillon, un extrait d&rsquo;un processeur AMD commercial, \u00e9tait soutenu par la broche dor\u00e9e au centre de l&rsquo;image. D&rsquo;un diam\u00e8tre inf\u00e9rieur \u00e0 0,000 005 m\u00e8tre (environ 20 fois plus petit que la largeur d&rsquo;un cheveu humain), il a \u00e9t\u00e9 d\u00e9coup\u00e9 dans la puce \u00e0 l&rsquo;aide d&rsquo;un faisceau d&rsquo;ions focalis\u00e9 et plac\u00e9 sur la broche.<\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"5D5Abifqkp\"><p><a href=\"https:\/\/www.eenewseurope.com\/en\/thales-developing-portable-ct-x-ray-scanner\/\">Thales developing portable CT X-ray scanner<\/a><\/p><\/blockquote>\n<p><iframe class=\"wp-embedded-content lazyload\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;Thales developing portable CT X-ray scanner&#8221; &#8212; eeNews Europe\" data-src=\"https:\/\/www.eenewseurope.com\/en\/thales-developing-portable-ct-x-ray-scanner\/embed\/#?secret=1kgTLtRA6R#?secret=5D5Abifqkp\" data-secret=\"5D5Abifqkp\" width=\"500\" height=\"282\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" data-load-mode=\"1\"><\/iframe><\/p>\n<p>Lorsque le faisceau oscille, chaque image change l\u00e9g\u00e8rement, et ces changements sont utilis\u00e9s pour suivre la position r\u00e9elle du faisceau caus\u00e9e par les vibrations inconnues. L&rsquo;algorithme compare les positions du faiceau dans les diff\u00e9rentes images. Si les positions sont identiques, elles sont plac\u00e9es dans le m\u00eame groupe et ajout\u00e9es \u00e0 la somme.<\/p>\n<p>En regroupant les images \u00e0 faible exposition, il est possible d&rsquo;augmenter la teneur en informations. Par cons\u00e9quent, les chercheurs sont en mesure de reconstruire une image nette avec un contenu lumineux \u00e9lev\u00e9 en utilisant le flot d&rsquo;images \u00e0 exposition courte.<\/p>\n<p><a href=\"http:\/\/www.psi.ch\">www.psi.ch<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Des chercheurs suisses ont atteint une r\u00e9solution record de 4 nm pour une radiographie 3D d&rsquo;un processeur AMD. L&rsquo;\u00e9quipe de l&rsquo;Institut Paul Scherrer (PSI) a utilis\u00e9 les rayons X de la Source de Lumi\u00e8re Suisse SLS du PSI. Au lieu d&rsquo;utiliser des lentilles, l&rsquo;\u00e9quipe a eu recours \u00e0 une technique appel\u00e9e ptychographie, qui consiste \u00e0 [&hellip;]<\/p>\n","protected":false},"author":40,"featured_media":457481,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[883],"tags":[910],"domains":[47],"ppma_author":[3640,6199],"class_list":["post-457510","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologies","tag-sensing-conditioning-fr","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Record mondial pour la radiographie X d&#039;une puce 3D ...<\/title>\n<meta name=\"description\" content=\"Des chercheurs ont atteint une r\u00e9solution de 4 nm pour une radiographie 3D d&#039;un processeur AMD en utilisant la technique de ptychographie.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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