{"id":3769,"date":"2022-06-20T14:59:11","date_gmt":"2022-06-20T06:59:11","guid":{"rendered":"https:\/\/uetpcb.com\/?p=3769"},"modified":"2022-06-20T15:44:42","modified_gmt":"2022-06-20T07:44:42","slug":"pcb-surface-finishes-immersion-tin-pcb","status":"publish","type":"post","link":"https:\/\/uetpcb.com\/fr\/pcb-surface-finishes-immersion-tin-pcb\/","title":{"rendered":"Finitions de surface des circuits imprim\u00e9s - Circuit imprim\u00e9 \u00e9tam\u00e9 par immersion"},"content":{"rendered":"<p>L'\u00e9tamage par immersion est un \u00e9tamage des circuits imprim\u00e9s appartenant \u00e0 l'une des finitions de surface des circuits imprim\u00e9s. Ce n'est pas la m\u00eame chose que l'\u00e9tamage \u00e0 l'air chaud (HASL). Les circuits imprim\u00e9s \u00e9tam\u00e9s par immersion sont destin\u00e9s \u00e0 faciliter les proc\u00e9dures d'emballage des circuits imprim\u00e9s et des puces. L'HASL a des limites de processus dans les finitions de surface des circuits imprim\u00e9s. L'\u00e9tain en immersion est principalement fix\u00e9 \u00e0 la surface du circuit en cuivre par l'\u00e9change entre le cuivre et l'\u00e9tain. Sa fonction premi\u00e8re est de prot\u00e9ger les circuits en cuivre de l'oxydation. Et comme l'\u00e9tain a l'air blanc, on l'appelle aussi \"\u00e9tain blanc\". En outre, le trempage de l'\u00e9tain est le moyen le plus \u00e9conomique de traiter toutes les finitions de surface des circuits imprim\u00e9s. C'est pourquoi il est tr\u00e8s populaire parmi les concepteurs.<\/p>\n<div class=\"container section-title-container\" ><h2 class=\"section-title section-title-normal\"><b aria-hidden=\"true\"><\/b><span class=\"section-title-main\" >Avantages de la finition des circuits imprim\u00e9s en \u00e9tain par immersion<\/span><b aria-hidden=\"true\"><\/b><\/h2><\/div>\n<div class=\"row align-middle\"  id=\"row-728134167\">\n\n\t<div id=\"col-1193799274\" class=\"col medium-6 small-12 large-6\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1919679262\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img decoding=\"async\" width=\"1020\" height=\"464\" src=\"https:\/\/uetpcb.com\/wp-content\/uploads\/2022\/06\/IMG20210709113535-1030x469.jpg\" class=\"attachment-large size-large\" alt=\"PCB \u00e9tam\u00e9 par immersion\" srcset=\"https:\/\/uetpcb.com\/wp-content\/uploads\/2022\/06\/IMG20210709113535-1030x469.jpg 1030w, https:\/\/uetpcb.com\/wp-content\/uploads\/2022\/06\/IMG20210709113535-300x137.jpg 300w, https:\/\/uetpcb.com\/wp-content\/uploads\/2022\/06\/IMG20210709113535-768x350.jpg 768w, https:\/\/uetpcb.com\/wp-content\/uploads\/2022\/06\/IMG20210709113535-1536x700.jpg 1536w, https:\/\/uetpcb.com\/wp-content\/uploads\/2022\/06\/IMG20210709113535-2048x933.jpg 2048w\" sizes=\"(max-width: 1020px) 100vw, 1020px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1919679262 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<ol>\n<li>Excellente conductivit\u00e9 et soudabilit\u00e9, peut \u00eatre soud\u00e9e plusieurs fois<\/li>\n<li>La couche d'\u00e9tain de l'\u00e9vier ne contient pas de plomb et ne pollue pas l'environnement.<\/li>\n<li>Processus simple, facile \u00e0 retravailler, faible co\u00fbt<\/li>\n<li>Longue p\u00e9riode de stockage (0,6-1,5 ans)<\/li>\n<li>Convient pour le placement de petits composants\/BGA\/petits pas<\/li>\n<li>Surface originale plus lisse<\/li>\n<\/ol>\n<div class=\"container section-title-container\" ><h2 class=\"section-title section-title-normal\"><b aria-hidden=\"true\"><\/b><span class=\"section-title-main\" >Inconv\u00e9nients du traitement de surface des circuits imprim\u00e9s \u00e0 l'\u00e9tain par immersion<\/span><b aria-hidden=\"true\"><\/b><\/h2><\/div>\n<div class=\"row align-middle\"  id=\"row-261852591\">\n\n\t<div id=\"col-1580883142\" class=\"col medium-6 small-12 large-6\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_751307435\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img decoding=\"async\" width=\"1020\" height=\"575\" src=\"https:\/\/uetpcb.com\/wp-content\/uploads\/2022\/06\/IMG20210709115512-1030x581.jpg\" class=\"attachment-large size-large\" alt=\"PCB \u00e9tam\u00e9 par immersion\" srcset=\"https:\/\/uetpcb.com\/wp-content\/uploads\/2022\/06\/IMG20210709115512-1030x581.jpg 1030w, https:\/\/uetpcb.com\/wp-content\/uploads\/2022\/06\/IMG20210709115512-300x169.jpg 300w, https:\/\/uetpcb.com\/wp-content\/uploads\/2022\/06\/IMG20210709115512-768x434.jpg 768w, https:\/\/uetpcb.com\/wp-content\/uploads\/2022\/06\/IMG20210709115512-1536x867.jpg 1536w, https:\/\/uetpcb.com\/wp-content\/uploads\/2022\/06\/IMG20210709115512-2048x1156.jpg 2048w\" sizes=\"(max-width: 1020px) 100vw, 1020px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_751307435 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<ol>\n<li>Tendance \u00e0 former des moustaches, ce qui entra\u00eene des probl\u00e8mes de court-circuit dans les connexions<\/li>\n<li>La thiour\u00e9e (canc\u00e9rig\u00e8ne) est utilis\u00e9e dans le processus.<\/li>\n<li>Pas bon pour la PTH<\/li>\n<li>Peut endommager la couche de r\u00e9serve de la soudure<\/li>\n<li>Difficile de mesurer l'\u00e9paisseur<\/li>\n<\/ol>\n<div class=\"container section-title-container\" ><h2 class=\"section-title section-title-normal\"><b aria-hidden=\"true\"><\/b><span class=\"section-title-main\" >Chine \u00e9tain \u00e0 immersion PCB VS HASL<\/span><b aria-hidden=\"true\"><\/b><\/h2><\/div>\n<p>Les deux proc\u00e9dures de traitement de surface des circuits imprim\u00e9s sont l'HASL et l'\u00e9tain par immersion. Cependant, la plupart des gens sont incapables de faire la distinction entre les deux. Les parall\u00e8les et les contrastes entre les deux sont ensuite examin\u00e9s.<br \/>Similitudes.<br \/>Les proc\u00e9d\u00e9s de traitement de surface tels que l'HASL et l'\u00e9tain par immersion r\u00e9pondent aux normes de brasage sans plomb.<\/p>\n<h3>Diff\u00e9rences.<\/h3>\n<h3>1. D\u00e9roulement du processus<\/h3>\n<p>HASL : pr\u00e9traitement - pulv\u00e9risation d'\u00e9tain - essais - mise en forme - contr\u00f4le de l'aspect.<br \/>\u00c9tain par immersion : Essais - Traitement chimique - \u00c9tain par immersion - Moulage - Contr\u00f4le de l'aspect.<\/p>\n<h3>2. Principe du processus<\/h3>\n<p>Le proc\u00e9d\u00e9 HASL consiste principalement \u00e0 faire p\u00e9n\u00e9trer le circuit imprim\u00e9 directement dans la p\u00e2te \u00e0 braser en fusion. Une couche d'\u00e9tain dense est produite sur la surface en cuivre du circuit imprim\u00e9 apr\u00e8s le nivellement \u00e0 l'air chaud.<br \/>L'\u00e9tain par immersion est principalement utilis\u00e9 pour former une fine couche d'\u00e9tain sur la surface du circuit imprim\u00e9 par une r\u00e9action de d\u00e9placement.<\/p>\n<h3>3. Propri\u00e9t\u00e9s physiques<\/h3>\n<p>Comme l'HASL n'utilise que de l'\u00e9tain pur dans le processus de fabrication, la surface est facile \u00e0 nettoyer et peut \u00eatre stock\u00e9e pendant un an \u00e0 temp\u00e9rature ambiante. L'\u00e9paisseur de la couche d'\u00e9tain HASL est d'environ 1um-40um, et la structure de la surface du circuit imprim\u00e9 en \u00e9tain pour immersion est dense, complexe et ne se raye pas facilement. Il n'est pas facile d'avoir des probl\u00e8mes de d\u00e9coloration de la surface pendant le processus de soudage.<br \/>L'\u00e9paisseur de l'\u00e9tain immerg\u00e9 est d'environ 0,8 \u00e0 1,2 mm. La structure de la surface est plus l\u00e2che et plus molle, et elle est sujette aux rayures. La r\u00e9action chimique de l'\u00e9tain immerg\u00e9 \u00e9tant complexe, il est difficile de le nettoyer. Il peut \u00eatre conserv\u00e9 \u00e0 temp\u00e9rature ambiante pendant six mois \u00e0 un an.<\/p>\n<h3>4. Caract\u00e9ristiques d'apparence<\/h3>\n<p>HASL - La surface est brillante et belle.<br \/>\u00c9tain \u00e0 immersion - surface blanche claire, sans \u00e9clat, facile \u00e0 changer de couleur.<\/p>\n<div class=\"container section-title-container\" ><h2 class=\"section-title section-title-normal\"><b aria-hidden=\"true\"><\/b><span class=\"section-title-main\" >Comment appliquer l'\u00e9tain \u00e0 immersion ?<\/span><b aria-hidden=\"true\"><\/b><\/h2><\/div>\n<p>Les \u00e9tapes de l'\u00e9tamage des circuits imprim\u00e9s sont les suivantes.<\/p>\n<h3>1. Nettoyage<\/h3>\n<p>Il s'agit de la premi\u00e8re \u00e9tape du processus de placage. Plongez la carte dans une solution acide pour \u00e9liminer l'huile, la graisse et les autres impuret\u00e9s de la surface. Lavez \u00e0 nouveau la surface avec de l'eau pour \u00e9liminer toute solution de nettoyage restante et tout r\u00e9sidu de surface. Cette \u00e9tape am\u00e9liore l'efficacit\u00e9 du processus de placage.<\/p>\n<h3>2. Micro-mordan\u00e7age<\/h3>\n<p>Les circuits imprim\u00e9s chinois en \u00e9tain par immersion sont plong\u00e9s une seconde fois dans une solution contenant de l'acide sulfurique (H2SO4). Cet acide rend la structure de la couche de cuivre du circuit imprim\u00e9 rugueuse et lui permet de se lier \u00e0 la couche d'\u00e9tain. Nous nettoyons \u00e0 nouveau la surface de la carte \u00e0 circuits imprim\u00e9s en \u00e9tain \u00e0 immersion afin de nous assurer qu'il n'y a pas de r\u00e9sidus.<\/p>\n<h3>3. Pr\u00e9-impr\u00e9gn\u00e9<\/h3>\n<p>Dans le pr\u00e9-impr\u00e9gn\u00e9, le rin\u00e7age du circuit imprim\u00e9 \u00e0 l'acide emp\u00eache l'oxydation pr\u00e9matur\u00e9e de la surface du cuivre. Cela fournit un bon cadre pour le d\u00e9p\u00f4t d'\u00e9tain.<\/p>\n<h3>4. Trempage de l'\u00e9tain<\/h3>\n<p>Le panneau est immerg\u00e9 dans une solution compos\u00e9e de cations d'\u00e9tain afin d'acc\u00e9l\u00e9rer le processus de r\u00e9duction chimique. Les ions d'\u00e9tain r\u00e9duisent le m\u00e9tal cuivre. Il se forme alors une fine couche d'\u00e9tain sur la plage de soudure en cuivre.<\/p>\n<h3>5. Nettoyage<\/h3>\n<p>Au cours de cette \u00e9tape, le circuit imprim\u00e9 en \u00e9tain immerg\u00e9 peut \u00eatre lav\u00e9 \u00e0 l'eau chaude afin d'\u00e9liminer les sels de placage et d'\u00e9viter les taches lors du s\u00e9chage. S'il n'est pas correctement rinc\u00e9, le circuit imprim\u00e9 appara\u00eetra terne et brillant.<\/p>\n<h3>6. S\u00e9chage<\/h3>\n<p>Apr\u00e8s le nettoyage, il est essentiel de s\u00e9cher le tableau. Le s\u00e9chage permet d'\u00e9liminer l'humidit\u00e9 de la surface. On peut le faire en le faisant cuire dans un s\u00e9choir \u00e0 air ou dans un four chaud. L'essentiel est de s'assurer que le temps de cuisson et la temp\u00e9rature de fonctionnement sont corrects.<\/p>","protected":false},"excerpt":{"rendered":"<p>L'\u00e9tamage par immersion est un \u00e9tamage des circuits imprim\u00e9s appartenant \u00e0 l'une des finitions de surface des circuits imprim\u00e9s. Ce n'est pas la m\u00eame chose que l'\u00e9tamage \u00e0 l'air chaud (HASL). Les circuits imprim\u00e9s \u00e9tam\u00e9s par immersion sont destin\u00e9s \u00e0 faciliter les proc\u00e9dures d'emballage des circuits imprim\u00e9s et des puces. L'HASL a des limites de processus dans les finitions de surface des circuits imprim\u00e9s. La finition des circuits imprim\u00e9s en \u00e9tain par immersion en Chine est une alternative...<\/p>","protected":false},"author":10,"featured_media":3733,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-3769","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Benefits of Immersion Tin PCB Finish - Immersion Tin PCB Manufacturers<\/title>\n<meta name=\"description\" content=\"Chemical tin dip is one of the PCB surface treatment processes, through the substitution reaction between copper and tin ions.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/uetpcb.com\/fr\/finitions-de-surface-pcb-pcb-etain-par-immersion\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Benefits of Immersion Tin PCB Finish - Immersion Tin PCB Manufacturers\" \/>\n<meta property=\"og:description\" content=\"Chemical tin dip is one of the PCB surface treatment processes, through the substitution reaction between copper and tin ions.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/uetpcb.com\/fr\/finitions-de-surface-pcb-pcb-etain-par-immersion\/\" \/>\n<meta property=\"og:site_name\" content=\"UETPCB\" \/>\n<meta property=\"article:published_time\" content=\"2022-06-20T06:59:11+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-06-20T07:44:42+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/uetpcb.com\/wp-content\/uploads\/2022\/06\/pcb.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1396\" \/>\n\t<meta property=\"og:image:height\" content=\"1047\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"zhaowenli\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@hx_admin\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"zhaowenli\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/uetpcb.com\\\/pcb-surface-finishes-immersion-tin-pcb\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/uetpcb.com\\\/pcb-surface-finishes-immersion-tin-pcb\\\/\"},\"author\":{\"name\":\"zhaowenli\",\"@id\":\"https:\\\/\\\/uetpcb.com\\\/#\\\/schema\\\/person\\\/18d09d6b81c74aa22a0ddb2bd628dd8e\"},\"headline\":\"PCB Surface Finishes &#8211; 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