{"id":3636,"date":"2025-07-15T14:42:44","date_gmt":"2025-07-15T06:42:44","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=3636"},"modified":"2025-07-15T15:01:35","modified_gmt":"2025-07-15T07:01:35","slug":"what-is-the-shelf-life-of-pcb","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/","title":{"rendered":"Qual \u00e9 o prazo de validade do PCB?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_74 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u00cdndice<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/#Factors_affecting_the_shelf_life_of_PCB\" >Factores que afectam o prazo de validade dos PCB<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/#Surface_treatment_process\" >Processo de tratamento de superf\u00edcie<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/#Storage_conditions\" >Condi\u00e7\u00f5es de armazenamento<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/#Material_properties\" >Propriedades dos materiais<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/#Expired_PCB_Disposal_Methods\" >M\u00e9todos de elimina\u00e7\u00e3o de PCB expirados<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/#Failure_Mode_Analysis\" >An\u00e1lise do modo de falha<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/#Tiered_Handling_Solutions\" >Solu\u00e7\u00f5es de manuseamento escalonadas<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/#Engineering_Practices_to_Extend_PCB_Shelf_Life\" >Pr\u00e1ticas de engenharia para prolongar a vida \u00fatil dos PCB<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/#Advanced_Packaging_Technology\" >Tecnologia de embalagem avan\u00e7ada<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/#Optimized_Surface_Finish_Selection\" >Sele\u00e7\u00e3o optimizada do acabamento de superf\u00edcie<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/#Smart_Monitoring_Systems\" >Sistemas de monitoriza\u00e7\u00e3o inteligentes<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/#Risk_Assessment_for_Using_Expired_PCBs\" >Avalia\u00e7\u00e3o dos riscos da utiliza\u00e7\u00e3o de PCB expirados<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/#Mandatory_Inspection_Items\" >Itens de inspe\u00e7\u00e3o obrigat\u00f3ria<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/#Risk_Mitigation_Measures\" >Medidas de atenua\u00e7\u00e3o dos riscos<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Factors_affecting_the_shelf_life_of_PCB\"><\/span>Factores que afectam o prazo de validade dos PCB<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Surface_treatment_process\"><\/span>Processo de tratamento de superf\u00edcie<span class=\"ez-toc-section-end\"><\/span><\/h3><p>O acabamento da superf\u00edcie de uma placa de circuito impresso \u00e9 o que determina o tempo que durar\u00e1 na prateleira. Existem diferen\u00e7as significativas na sua resist\u00eancia \u00e0 oxida\u00e7\u00e3o e na prote\u00e7\u00e3o contra a humidade.<\/p><ul class=\"wp-block-list\"><li><strong>HASL (nivelamento de solda por ar quente): <\/strong>Trata-se de um processo bem conhecido, mas que s\u00f3 funciona durante cerca de seis meses e que, por vezes, pode levar \u00e0 forma\u00e7\u00e3o de \u00f3xido de estanho.<\/li>\n\n<li><strong>ENIG (ouro de imers\u00e3o em n\u00edquel eletrol\u00edtico)<\/strong>: Prazo de validade de 12 meses, risco de \"almofada preta\" devido \u00e0 difus\u00e3o do n\u00edquel<\/li>\n\n<li><strong>Prata de imers\u00e3o<\/strong>: Prazo de validade de apenas 3 meses, aumentando o risco de migra\u00e7\u00e3o da prata ao longo do tempo<\/li>\n\n<li><strong>OSP (conservante org\u00e2nico de soldabilidade)<\/strong>: 3-6 meses, requer uma veda\u00e7\u00e3o herm\u00e9tica para evitar a decomposi\u00e7\u00e3o<\/li>\n\n<li><strong>Revestimento de ouro duro<\/strong>: Para aplica\u00e7\u00f5es especiais, prazo de validade at\u00e9 24 meses<\/li><\/ul><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-1.jpg\" alt=\"Prazo de validade do PCB\" class=\"wp-image-3640\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Storage_conditions\"><\/span>Condi\u00e7\u00f5es de armazenamento<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Os ambientes de armazenamento em conformidade com as normas IPC-1601 devem cumprir:<\/p><ul class=\"wp-block-list\"><li><strong>Controlo da temperatura e da humidade<\/strong>:<\/li>\n\n<li>Gama de temperaturas \u00f3ptima: 20\u00b15\u00b0C (extremos n\u00e3o superiores a 15-30\u00b0C)<\/li>\n\n<li>Requisitos de humidade: 30-50% RH (m\u00e1ximo 70%)<\/li>\n\n<li><strong>Normas de embalagem<\/strong>:<\/li>\n\n<li>Sacos de folha de alum\u00ednio selados sob v\u00e1cuo com cart\u00f5es indicadores de humidade &lt;5%<\/li>\n\n<li>Utiliza\u00e7\u00e3o de dessecante \u226520g\/m\u00b3 de volume de embalagem<\/li>\n\n<li><strong>Prote\u00e7\u00e3o da luz<\/strong>: A exposi\u00e7\u00e3o aos raios UV acelera a degrada\u00e7\u00e3o da pel\u00edcula OSP<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Material_properties\"><\/span>Propriedades dos materiais<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Placas FR-4 padr\u00e3o<\/strong>: Dura\u00e7\u00e3o te\u00f3rica de vida de 5-10 anos (fechado)<\/li>\n\n<li><strong>Materiais de alta frequ\u00eancia (por exemplo, PTFE)<\/strong>: Deve ser utilizado no prazo de 3 anos<\/li>\n\n<li><strong>Placas HDI<\/strong>: Prazo de validade mais curto (redu\u00e7\u00e3o de 20%) devido a camadas diel\u00e9ctricas mais finas<\/li>\n\n<li><strong>Placas de cobre pesadas (\u22653oz)<\/strong>: Requer uma aten\u00e7\u00e3o especial aos riscos de oxida\u00e7\u00e3o da camada interior<\/li><\/ul><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-1-1.jpg\" alt=\"Prazo de validade do PCB\" class=\"wp-image-3641\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-1-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-1-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-1-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><p>Precisa de uma avalia\u00e7\u00e3o profissional do prazo de validade de PCB? <a href=\"https:\/\/www.topfastpcb.com\/pt\/contact\/\">Contacte a nossa equipa de engenharia de fiabilidade para uma avalia\u00e7\u00e3o gratuita<\/a>.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Expired_PCB_Disposal_Methods\"><\/span>M\u00e9todos de elimina\u00e7\u00e3o de PCB expirados<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Failure_Mode_Analysis\"><\/span>An\u00e1lise do modo de falha<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Oxida\u00e7\u00e3o da camada met\u00e1lica<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Difus\u00e3o de n\u00edquel para a camada de ouro em placas ENIG (&gt;12 meses)<\/li>\n\n<li>Aumento do risco de estanhagem em placas HASL<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Degrada\u00e7\u00e3o do substrato<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>A hidr\u00f3lise da resina reduz o valor Tg<\/li>\n\n<li>A for\u00e7a de liga\u00e7\u00e3o entre camadas diminui em \u226515% (teste IPC-TM-650)<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Riscos de absor\u00e7\u00e3o de humidade<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Redu\u00e7\u00e3o da nota\u00e7\u00e3o MSL (por exemplo, de MSL3 para MSL2)<\/li>\n\n<li>A press\u00e3o de vapor excede os limites do substrato durante o refluxo<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tiered_Handling_Solutions\"><\/span>Solu\u00e7\u00f5es de manuseamento escalonadas<span class=\"ez-toc-section-end\"><\/span><\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Dura\u00e7\u00e3o excedida<\/th><th>Processo de tratamento<\/th><th>Pontos de controlo de qualidade<\/th><\/tr><\/thead><tbody><tr><td>\u22642 meses<\/td><td>120\u00b0C\/1h de cozedura<\/td><td>Teor de humidade p\u00f3s-cozedura &lt;0,1%<\/td><\/tr><tr><td>2-6 meses<\/td><td>120\u00b0C\/2h de cozedura faseada<\/td><td>\u00c9 necess\u00e1rio efetuar um ensaio de delamina\u00e7\u00e3o TMA<\/td><\/tr><tr><td>6-12 meses<\/td><td>120\u00b0C\/4h + prote\u00e7\u00e3o de azoto<\/td><td>Ensaio de soldabilidade obrigat\u00f3rio<\/td><\/tr><tr><td>&gt;12 meses<\/td><td>Elimina\u00e7\u00e3o recomendada<\/td><td>Ensaios de choque t\u00e9rmico em amostras<\/td><\/tr><\/tbody><\/table><\/figure><p><strong>T\u00e9cnicas especiais de tratamento<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Soldadura por refluxo com azoto (teor de O\u2082 &lt;100ppm)<\/li>\n\n<li>Utiliza\u00e7\u00e3o de pasta de solda n\u00e3o limpa altamente ativa (por exemplo, grau ROL0)<\/li><\/ul><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-2.jpg\" alt=\"Prazo de validade do PCB\" class=\"wp-image-3642\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Engineering_Practices_to_Extend_PCB_Shelf_Life\"><\/span>Pr\u00e1ticas de engenharia para prolongar a vida \u00fatil dos PCB<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Advanced_Packaging_Technology\"><\/span>Tecnologia de embalagem avan\u00e7ada<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Embalagem de prote\u00e7\u00e3o multicamada<\/strong>:<\/li><\/ul><ol class=\"wp-block-list\"><li>Camada interior: Saco de folha de alum\u00ednio anti-est\u00e1tico<\/li>\n\n<li>Camada interm\u00e9dia: Absorvente de oxig\u00e9nio + cart\u00e3o indicador de humidade<\/li>\n\n<li>Camada exterior: Enchimento em EPE \u00e0 prova de choque<\/li><\/ol><ul class=\"wp-block-list\"><li><strong>Solu\u00e7\u00f5es de armazenamento a longo prazo<\/strong>:<\/li>\n\n<li>Armazenamento de azoto (teor de O\u2082 &lt;0,5%)<\/li>\n\n<li>Armazenamento a baixa temperatura a -10\u00b0C (\u00e9 necess\u00e1rio evitar a condensa\u00e7\u00e3o)<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Optimized_Surface_Finish_Selection\"><\/span>Sele\u00e7\u00e3o optimizada do acabamento de superf\u00edcie<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Aplica\u00e7\u00f5es de alta fiabilidade<\/strong>: ENEPIG (prazo de validade de 18 meses)<\/li>\n\n<li><strong>Projectos sens\u00edveis aos custos<\/strong>: Processo h\u00edbrido ImAg+OSP<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Smart_Monitoring_Systems\"><\/span>Sistemas de monitoriza\u00e7\u00e3o inteligentes<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Implementar sensores IoT para rastreio em tempo real de:<\/p><ul class=\"wp-block-list\"><li>Flutua\u00e7\u00f5es de temperatura\/humidade do armaz\u00e9m<\/li>\n\n<li>Altera\u00e7\u00f5es da press\u00e3o interna do saco<\/li>\n\n<li>Descolora\u00e7\u00e3o do material (atrav\u00e9s de vis\u00e3o artificial)<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Risk_Assessment_for_Using_Expired_PCBs\"><\/span>Avalia\u00e7\u00e3o dos riscos da utiliza\u00e7\u00e3o de PCB expirados<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mandatory_Inspection_Items\"><\/span>Itens de inspe\u00e7\u00e3o obrigat\u00f3ria<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Teste de soldabilidade<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>De acordo com as normas IPC-J-STD-003B<\/li>\n\n<li>A \u00e1rea de dispers\u00e3o da solda deve exceder 95%<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Verifica\u00e7\u00e3o da fiabilidade<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Ensaios de ciclos t\u00e9rmicos (-55\u00b0C~125\u00b0C, 100 ciclos)<\/li>\n\n<li>Ensaio em panela de press\u00e3o (121\u00b0C\/100%RH, 96h)<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Risk_Mitigation_Measures\"><\/span>Medidas de atenua\u00e7\u00e3o dos riscos<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>100% inspe\u00e7\u00e3o dos primeiros artigos + exame ampliado da junta de soldadura<\/li>\n\n<li>Rastreio de envelhecimento adicional (48h\/85\u00b0C)<\/li>\n\n<li>Almofadas de teste reservadas ao longo dos bordos da placa<\/li><\/ul><p><\/p>","protected":false},"excerpt":{"rendered":"<p>H\u00e1 tr\u00eas factores principais que afectam a dura\u00e7\u00e3o dos PCB: a forma como s\u00e3o tratados durante a produ\u00e7\u00e3o, a forma como s\u00e3o armazenados e as necessidades da pr\u00f3pria placa. Existe um plano de tratamento para PCBs expiradas que foi classificado e um plano de pr\u00e1ticas de engenharia para prolongar a vida \u00fatil das PCBs. O plano engloba tecnologia de embalagem avan\u00e7ada, op\u00e7\u00f5es de tratamento de superf\u00edcie melhoradas e sistemas de monitoriza\u00e7\u00e3o inteligentes. Tudo isto proporciona \u00e0s empresas de fabrico de produtos electr\u00f3nicos uma solu\u00e7\u00e3o completa de gest\u00e3o da vida \u00fatil das PCB.<\/p>","protected":false},"author":1,"featured_media":3638,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[109],"tags":[323],"class_list":["post-3636","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq","tag-pcb-shelf-life"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is the shelf life of PCB? - Topfastpcb<\/title>\n<meta name=\"description\" content=\"The lifespan of PCBs can be anywhere from six months to 10 years. The main things that affect this are the surface treatment, how they are stored, and how they are disposed of when they are no longer needed.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/what-is-the-shelf-life-of-pcb\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is the shelf life of PCB? - Topfastpcb\" \/>\n<meta property=\"og:description\" content=\"The lifespan of PCBs can be anywhere from six months to 10 years. 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