{"id":4135,"date":"2025-08-20T08:34:00","date_gmt":"2025-08-20T00:34:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=4135"},"modified":"2025-08-19T15:47:31","modified_gmt":"2025-08-19T07:47:31","slug":"pcb-hasl-and-lead-free-hasl-processes","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/","title":{"rendered":"Processos de PCB HASL e HASL sem chumbo"},"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\/pcb-hasl-and-lead-free-hasl-processes\/#HASL_process\" >Processo HASL<\/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\/pcb-hasl-and-lead-free-hasl-processes\/#11_Differences_between_HASL_and_lead-free_HASL\" >1.1 Diferen\u00e7as entre HASL e HASL sem chumbo<\/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\/pcb-hasl-and-lead-free-hasl-processes\/#12_Core_HASL_Process_Flow\" >1.2 Fluxo do processo HASL principal<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#121_Pre-Treatment_Stage\" >1.2.1 Fase de pr\u00e9-tratamento<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#122_Flux_Application\" >1.2.2 Aplica\u00e7\u00e3o do fluxo<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#123_Hot_Air_Leveling_Key_Steps\" >1.2.3 Etapas principais do nivelamento por ar quente<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#124_Quality_Inspection\" >1.2.4 Inspe\u00e7\u00e3o da qualidade<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#13_Process_Advantages_and_Limitations\" >1.3 Vantagens e limita\u00e7\u00f5es do processo<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#Advantages\" >Vantagens<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#Limitations\" >Limita\u00e7\u00f5es<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#ENIG_Electroless_Nickel_Immersion_Gold_Process\" >Processo ENIG (ouro de imers\u00e3o em n\u00edquel sem electrodos)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#21_Process_Principles\" >2.1 Princ\u00edpios do processo<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#22_Advantages\" >2.2 Vantagens<\/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\/pcb-hasl-and-lead-free-hasl-processes\/#23_Challenges\" >2.3 Desafios<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#OSP_Organic_Solderability_Preservative\" >OSP (conservante org\u00e2nico de soldabilidade)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#31_Process_Principles\" >3.1 Princ\u00edpios do processo<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#32_Advantages\" >3.2 Vantagens<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#33_Limitations\" >3.3 Limita\u00e7\u00f5es<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#Process_Selection_Guide\" >Guia de sele\u00e7\u00e3o de processos<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#41_Comparison\" >4.1 Compara\u00e7\u00e3o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#42_Recommendations\" >4.2 Recomenda\u00e7\u00f5es<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.topfastpcb.com\/pt\/blog\/pcb-hasl-and-lead-free-hasl-processes\/#43_Topfast_Capabilities\" >4.3 Capacidades Topfast<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"HASL_process\"><\/span>Processo HASL<span class=\"ez-toc-section-end\"><\/span><\/h2><p>O HASL (Hot Air Solder Leveling) \u00e9 um dos processos de tratamento de superf\u00edcie mais cl\u00e1ssicos e econ\u00f3micos no fabrico de PCB e desempenha um papel importante na ind\u00fastria de fabrico de produtos electr\u00f3nicos. Este processo envolve a cobertura da superf\u00edcie de cobre com uma camada de liga de estanho-chumbo para proporcionar um desempenho de soldadura fi\u00e1vel e prote\u00e7\u00e3o contra a oxida\u00e7\u00e3o das PCB.<\/p><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\/08\/HASL-process-1.jpg\" alt=\"Processo HASL\" class=\"wp-image-4137\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/HASL-process-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/HASL-process-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/HASL-process-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"11_Differences_between_HASL_and_lead-free_HASL\"><\/span>1.1 Diferen\u00e7as entre HASL e HASL sem chumbo<span class=\"ez-toc-section-end\"><\/span><\/h3><p>O HASL (Hot Air Solder Leveling) \u00e9 uma das tecnologias de tratamento de superf\u00edcie mais cl\u00e1ssicas e econ\u00f3micas em <a href=\"https:\/\/www.topfastpcb.com\/pt\/\">Fabrico de PCB<\/a>. Este processo reveste as superf\u00edcies de cobre com uma camada de liga de estanho-chumbo para proporcionar uma soldabilidade fi\u00e1vel e resist\u00eancia \u00e0 oxida\u00e7\u00e3o. Com o aumento das exig\u00eancias ambientais, o HASL sem chumbo tornou-se o padr\u00e3o da ind\u00fastria.<\/p><p><strong>Diferen\u00e7as na composi\u00e7\u00e3o dos materiais<\/strong>:<\/p><ul class=\"wp-block-list\"><li>A HASL tradicional utiliza a liga Sn63\/Pb37 (63% estanho + 37% chumbo), ponto de fus\u00e3o: 183\u00b0C<\/li>\n\n<li>A HASL sem chumbo \u00e9 principalmente utilizada:<\/li>\n\n<li>SAC305 (96,5% de estanho + 3% de prata + 0,5% de cobre), ponto de fus\u00e3o: 217-220\u00b0C<\/li>\n\n<li>SnCu0.7 (99.3% estanho + 0.7% cobre), ponto de fus\u00e3o: 227\u00b0C<\/li>\n\n<li>Estanho puro (Sn100), ponto de fus\u00e3o: 232\u00b0C<\/li><\/ul><p><strong>Compara\u00e7\u00e3o das carater\u00edsticas do processo<\/strong>:<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Im\u00f3veis<\/th><th>HASL com chumbo<\/th><th>HASL sem chumbo<\/th><\/tr><\/thead><tbody><tr><td>Ponto de fus\u00e3o<\/td><td>183\u00b0C<\/td><td>217-232\u00b0C<\/td><\/tr><tr><td>Temperatura do pote de solda<\/td><td>200-210\u00b0C<\/td><td>240-255\u00b0C<\/td><\/tr><tr><td>Acabamento da superf\u00edcie<\/td><td>Brilhante<\/td><td>Relativamente mon\u00f3tono<\/td><\/tr><tr><td>Resist\u00eancia mec\u00e2nica<\/td><td>Boa ductilidade (elevada resist\u00eancia ao impacto)<\/td><td>Duro mas quebradi\u00e7o<\/td><\/tr><tr><td>Molhabilidade<\/td><td>Excelente (\u00e2ngulo de contacto &lt;30\u00b0)<\/td><td>Bom (\u00e2ngulo de contacto 35-45\u00b0)<\/td><\/tr><tr><td>Conformidade ambiental<\/td><td>Cont\u00e9m chumbo (37%)<\/td><td>Conte\u00fado de chumbo &lt;0,1% (compat\u00edvel com RoHS)<\/td><\/tr><tr><td>Custo<\/td><td>Inferior<\/td><td>15-20% superior<\/td><\/tr><tr><td>Aplicabilidade<\/td><td>Objetivo geral<\/td><td>Requer temperaturas de soldadura mais elevadas<\/td><\/tr><\/tbody><\/table><\/figure><p><strong>Diferen\u00e7as pr\u00e1ticas de desempenho<\/strong>:<\/p><ul class=\"wp-block-list\"><li><strong>Soldabilidade<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>A HASL com chumbo oferece uma melhor atividade de soldadura com um tempo de molhagem mais curto (1-2 segundos)<\/li>\n\n<li>O HASL sem chumbo requer um fluxo mais forte e um controlo mais rigoroso da temperatura<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Fiabilidade<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>As juntas de solda com chumbo apresentam melhor resist\u00eancia \u00e0 fadiga t\u00e9rmica (mais ciclos de temperatura)<\/li>\n\n<li>As juntas de solda sem chumbo mant\u00eam uma maior resist\u00eancia mec\u00e2nica ap\u00f3s um longo per\u00edodo de envelhecimento<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Janela de processo<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>O HASL com chumbo tem uma janela de processo mais ampla (\u00b110\u00b0C)<\/li>\n\n<li>A HASL sem chumbo requer um controlo mais rigoroso da temperatura (\u00b13\u00b0C)<\/li><\/ul><blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Dica profissional: A Topfast optimiza os par\u00e2metros HASL sem chumbo para obter um rendimento de soldadura de 99,5%, cumprindo as normas IPC-6012 Classe 3.<\/p><\/blockquote><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"12_Core_HASL_Process_Flow\"><\/span>1.2 Fluxo do processo HASL principal<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Como um fabricante profissional de PCB, Topfast emprega linhas de produ\u00e7\u00e3o HASL totalmente automatizadas com processos padronizados rigorosos:<\/p><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"121_Pre-Treatment_Stage\"><\/span>1.2.1 Fase de pr\u00e9-tratamento<span class=\"ez-toc-section-end\"><\/span><\/h4><ul class=\"wp-block-list\"><li><strong>Limpeza qu\u00edmica<\/strong>:<\/li>\n\n<li>O produto de limpeza \u00e1cido (pH 2-3) remove os \u00f3xidos de cobre<\/li>\n\n<li>Controlo da temperatura: 40-50\u00b0C, dura\u00e7\u00e3o: 2-3 min<\/li>\n\n<li>A micro-corros\u00e3o garante uma rugosidade de superf\u00edcie Ra 0,3-0,5\u03bcm<\/li>\n\n<li><strong>Enxaguamento<\/strong>:<\/li>\n\n<li>Enxaguamento em contracorrente em tr\u00eas fases (resistividade da \u00e1gua DI &gt;15M\u03a9-cm)<\/li>\n\n<li>Secagem com ar quente (60-80\u00b0C)<\/li><\/ul><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"122_Flux_Application\"><\/span>1.2.2 Aplica\u00e7\u00e3o do fluxo<span class=\"ez-toc-section-end\"><\/span><\/h4><ul class=\"wp-block-list\"><li>M\u00e9todos de aplica\u00e7\u00e3o:<\/li>\n\n<li>Espuma (tradicional): Espessura do fluxo 0,01-0,03 mm<\/li>\n\n<li>Pulveriza\u00e7\u00e3o (avan\u00e7ada):Mais uniforme, 30% menos consumo de fluxo<\/li>\n\n<li>Tipos de fluxo:<\/li>\n\n<li>\u00c0 base de colof\u00f3nia n\u00e3o limpa (ROH)<\/li>\n\n<li>Teor de s\u00f3lidos: 8-12%, \u00edndice de acidez: 35-45mgKOH\/g<\/li><\/ul><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"123_Hot_Air_Leveling_Key_Steps\"><\/span>1.2.3 Etapas principais do nivelamento por ar quente<span class=\"ez-toc-section-end\"><\/span><\/h4><ul class=\"wp-block-list\"><li><strong>Pr\u00e9-aquecimento<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Com chumbo: 130-140\u00b0C<\/li>\n\n<li>Sem chumbo: 150-160\u00b0C<\/li>\n\n<li>Dura\u00e7\u00e3o: 60-90 segundos<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Imers\u00e3o de solda<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Temperatura do cadinho de solda:<ul class=\"wp-block-list\"><li>Com chumbo: 210\u00b15\u00b0C<\/li>\n\n<li>Sem chumbo: 250\u00b15\u00b0C<\/li><\/ul><\/li>\n\n<li>Tempo de espera: 2-4 segundos (precis\u00e3o de \u00b10,5 segundos)<\/li>\n\n<li>Profundidade de imers\u00e3o: 3-5mm<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Nivelamento por ar quente<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Par\u00e2metros da faca de ar:<ul class=\"wp-block-list\"><li>Press\u00e3o: 0,3-0,5MPa<\/li>\n\n<li>Temperatura: 300-350\u00b0C<\/li>\n\n<li>\u00c2ngulo: 4\u00b0 de inclina\u00e7\u00e3o para baixo<\/li>\n\n<li>Velocidade do ar: 20-30m\/s<\/li><\/ul><\/li>\n\n<li>Tempo de processamento: 1-2 segundos<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Arrefecimento<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Arrefecimento por ar for\u00e7ado (taxa: 2-3\u00b0C\/seg.)<\/li>\n\n<li>Temperatura final &lt;60\u00b0C<\/li><\/ul><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"124_Quality_Inspection\"><\/span>1.2.4 Inspe\u00e7\u00e3o da qualidade<span class=\"ez-toc-section-end\"><\/span><\/h4><ul class=\"wp-block-list\"><li>AOI em linha (100% de cobertura):<\/li>\n\n<li>Inspe\u00e7\u00e3o da espessura da solda (1-40\u03bcm)<\/li>\n\n<li>Dete\u00e7\u00e3o de defeitos de superf\u00edcie (bolas de solda, cobre exposto, etc.)<\/li>\n\n<li>Testes de amostragem:<\/li>\n\n<li>Ensaio de soldabilidade (245\u00b0C, 3 seg.)<\/li>\n\n<li>Ensaio de ader\u00eancia (m\u00e9todo da fita)<\/li><\/ul><blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Avan\u00e7o tecnol\u00f3gico: O processo HASL sem chumbo protegido por nitrog\u00e9nio da Topfast reduz a oxida\u00e7\u00e3o da solda de 5% para 1,5%, melhorando significativamente o rendimento da solda.<\/p><\/blockquote><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"13_Process_Advantages_and_Limitations\"><\/span>1.3 Vantagens e limita\u00e7\u00f5es do processo<span class=\"ez-toc-section-end\"><\/span><\/h3><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Advantages\"><\/span>Vantagens<span class=\"ez-toc-section-end\"><\/span><\/h4><ul class=\"wp-block-list\"><li><strong>Efici\u00eancia de custos<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Baixo investimento em equipamento (~1\/3 da ENIG)<\/li>\n\n<li>Poupan\u00e7as significativas no custo do material (40-60% mais barato do que o ENIG)<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Fiabilidade da solda<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Suporta &gt;3 ciclos de refus\u00e3o (pico de 260\u00b0C)<\/li>\n\n<li>Elevada resist\u00eancia \u00e0 tra\u00e7\u00e3o da junta (com chumbo: 50-60MPa; sem chumbo: 55-65MPa)<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Ampla aplicabilidade<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Adequado para v\u00e1rios tamanhos de almofadas (passo m\u00ednimo de 0,5 mm)<\/li>\n\n<li>Compat\u00edvel com processos de furo passante e SMT<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Desempenho do armazenamento<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Prazo de validade de 12 meses (RH &lt;60%)<\/li>\n\n<li>Excelente resist\u00eancia \u00e0 oxida\u00e7\u00e3o (teste de pulveriza\u00e7\u00e3o salina de 48 horas)<\/li><\/ul><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Limitations\"><\/span>Limita\u00e7\u00f5es<span class=\"ez-toc-section-end\"><\/span><\/h4><ul class=\"wp-block-list\"><li><strong>Restri\u00e7\u00f5es de passo fino<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>N\u00e3o adequado para componentes BGA\/QFN com passo de 0,4 mm<\/li>\n\n<li>Risco de ponte de solda em projectos de passo fino<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Quest\u00f5es de planaridade<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Desnivelamento da superf\u00edcie: 15-25\u03bcm (afecta a montagem HDI)<\/li>\n\n<li>Varia\u00e7\u00e3o da espessura at\u00e9 20\u03bcm entre almofadas grandes\/pequenas<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Stress t\u00e9rmico<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>O processo a alta temperatura (especialmente sem chumbo) pode afetar os materiais de alta Tg<\/li>\n\n<li>Maior risco de empenamento para placas finas (&lt;0,8mm)<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Considera\u00e7\u00f5es ambientais<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>HASL com chumbo n\u00e3o compat\u00edvel com RoHS<\/li>\n\n<li>O HASL sem chumbo consome mais energia (temperaturas 30-50\u00b0C mais elevadas)<\/li><\/ul><p>Precisa de apoio profissional HASL? <a href=\"https:\/\/www.topfastpcb.com\/pt\/contact\/\">Contactar os engenheiros da Topfast<\/a> para solu\u00e7\u00f5es personalizadas<\/p><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\/08\/HASL-process-3.jpg\" alt=\"Processo HASL\" class=\"wp-image-4139\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/HASL-process-3.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/HASL-process-3-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/HASL-process-3-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"ENIG_Electroless_Nickel_Immersion_Gold_Process\"><\/span>Processo ENIG (ouro de imers\u00e3o em n\u00edquel sem electrodos)<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"21_Process_Principles\"><\/span>2.1 Princ\u00edpios do processo<span class=\"ez-toc-section-end\"><\/span><\/h3><p>O ENIG forma uma camada protetora composta atrav\u00e9s de niquelagem electrol\u00edtica e imers\u00e3o em ouro:<\/p><ul class=\"wp-block-list\"><li>Camada de n\u00edquel: 3-6\u03bcm (f\u00f3sforo 7-9%)<\/li>\n\n<li>Camada de ouro: 0,05-0,1\u03bcm<\/li><\/ul><p><strong>Par\u00e2metros-chave<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Temperatura do banho de n\u00edquel: 85-90\u00b0C<\/li>\n\n<li>Taxa de revestimento: 15-20\u03bcm\/h<\/li>\n\n<li>Temperatura do banho de ouro: 80-85\u00b0C<\/li>\n\n<li>pH: Banho de n\u00edquel 4,5-5,0, banho de ouro 5,5-6,5<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"22_Advantages\"><\/span>2.2 Vantagens<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Excelente planicidade<\/strong> (Ra&lt;0,1\u03bcm):<\/li><\/ul><ul class=\"wp-block-list\"><li>Ideal para BGA\/CSP com passo de 0,3 mm<\/li>\n\n<li>Coplanaridade da almofada &lt;5\u03bcm\/m<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Resist\u00eancia \u00e0 oxida\u00e7\u00e3o<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Prazo de validade de 18 meses<\/li>\n\n<li>Certifica\u00e7\u00e3o J-STD-003B Classe 3<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Condutividade el\u00e9ctrica<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Resistividade do ouro: 2,44\u03bc\u03a9-cm<\/li>\n\n<li>Resist\u00eancia de contacto &lt;10m\u03a9<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"23_Challenges\"><\/span>2.3 Desafios<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Problema do bloco preto<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Causas: Niquelagem excessiva ou teor anormal de f\u00f3sforo<\/li>\n\n<li>Solu\u00e7\u00e3o:A passiva\u00e7\u00e3o patenteada da Topfast&amp;#8217 reduz a taxa de blocos pretos para &lt;0,1%<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Factores de custo<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Custos elevados dos materiais (volatilidade do pre\u00e7o do ouro)<\/li>\n\n<li>Processo complexo (8-10 etapas)<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Resist\u00eancia da junta de solda<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Camada de IMC Ni-Au fr\u00e1gil<\/li>\n\n<li>Resist\u00eancia \u00e0 tra\u00e7\u00e3o ~40-45MPa<\/li><\/ul><blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>O ENIG da Topfast alcan\u00e7a uma uniformidade de espessura de \u00b110%, superando os padr\u00f5es da ind\u00fastria de \u00b115%.<\/p><\/blockquote><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"OSP_Organic_Solderability_Preservative\"><\/span>OSP (conservante org\u00e2nico de soldabilidade) <span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"31_Process_Principles\"><\/span>3.1 Princ\u00edpios do processo<span class=\"ez-toc-section-end\"><\/span><\/h3><p>OSP forma uma pel\u00edcula protetora org\u00e2nica de 0,2-0,5\u03bcm sobre cobre nu, contendo:<\/p><ul class=\"wp-block-list\"><li>Compostos de benzotriazol<\/li>\n\n<li>Compostos de imidazol<\/li>\n\n<li>\u00c1cidos carbox\u00edlicos<\/li><\/ul><p><strong>Fluxo do processo<\/strong>:<\/p><ol class=\"wp-block-list\"><li>Limpeza com \u00e1cido (5% H2SO4, 2min)<\/li>\n\n<li>Micro-etch (Na2S2O8, remover 1-2\u03bcm de cobre)<\/li>\n\n<li>Tratamento OSP (40-50\u00b0C, 1-2min)<\/li>\n\n<li>Secagem (60-80\u00b0C ar quente)<\/li><\/ol><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"32_Advantages\"><\/span>3.2 Vantagens<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Rent\u00e1vel<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>60% mais barato do que o HASL<\/li>\n\n<li>Baixo investimento em equipamento (~1\/5 da ENIG)<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Integridade do sinal<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Constante diel\u00e9ctrica est\u00e1vel (\u0394Dk &lt;0,02)<\/li>\n\n<li>Ideal para aplica\u00e7\u00f5es de alta frequ\u00eancia (&gt;10GHz)<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Amigo do ambiente<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Sem metais pesados<\/li>\n\n<li>Tratamento simplificado das \u00e1guas residuais<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"33_Limitations\"><\/span>3.3 Limita\u00e7\u00f5es<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Janela de soldabilidade<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Deve ser utilizado nas 24 horas seguintes \u00e0 abertura<\/li>\n\n<li>Apenas adequado para 1 ciclo de refus\u00e3o (o rendimento cai 30% na segunda refus\u00e3o)<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Dificuldades de inspe\u00e7\u00e3o<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Dif\u00edcil de medir opticamente a espessura da pel\u00edcula<\/li>\n\n<li>Requer tratamento especial das TIC<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Condi\u00e7\u00f5es de armazenamento<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Embalagem sob v\u00e1cuo necess\u00e1ria (RH &lt;30%)<\/li>\n\n<li>Temperatura de armazenamento: 15-30\u00b0C<\/li><\/ul><blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>A OSP melhorada da Topfast&amp;#8217 aumenta o prazo de validade de 3 para 6 meses e resiste a 2 ciclos de refluxo.<\/p><\/blockquote><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\/08\/HASL-process-2.jpg\" alt=\"Processo HASL\" class=\"wp-image-4138\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/HASL-process-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/HASL-process-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/HASL-process-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Process_Selection_Guide\"><\/span>Guia de sele\u00e7\u00e3o de processos<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"41_Comparison\"><\/span>4.1 Compara\u00e7\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Par\u00e2metro<\/th><th>HASL<\/th><th>ENIG<\/th><th>OSP<\/th><\/tr><\/thead><tbody><tr><td>Custo<\/td><td>$<\/td><td>$$$<\/td><td>$<\/td><\/tr><tr><td>Planicidade<\/td><td>\u25b3 (15-25\u03bcm)<\/td><td>\u25ce (&lt;5\u03bcm)<\/td><td>\u25cb (&lt;10\u03bcm)<\/td><\/tr><tr><td>Soldabilidade<\/td><td>\u25ce (3 refluxos)<\/td><td>\u25cb (5 refluxos)<\/td><td>\u25b3 (1-2 refluxos)<\/td><\/tr><tr><td>Prazo de validade<\/td><td>12mo<\/td><td>18mo<\/td><td>6mo<\/td><\/tr><tr><td>Min. Passo<\/td><td>&gt;0,5 mm<\/td><td>&gt;0,3 mm<\/td><td>&gt;0,4 mm<\/td><\/tr><tr><td>Amigo do ambiente<\/td><td>Sem chumbo OK<\/td><td>Excelente<\/td><td>Excelente<\/td><\/tr><tr><td>Aplica\u00e7\u00f5es<\/td><td>Eletr\u00f3nica de consumo<\/td><td>ICs de alta densidade<\/td><td>Rota\u00e7\u00e3o r\u00e1pida<\/td><\/tr><\/tbody><\/table><\/figure><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"42_Recommendations\"><\/span>4.2 Recomenda\u00e7\u00f5es<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Eletr\u00f3nica de consumo<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>HASL sem chumbo (melhor desempenho em termos de custos)<\/li>\n\n<li>Controlo do volume de pasta de solda para componentes de passo fino<\/li><\/ul><ul class=\"wp-block-list\"><li><strong><a href=\"https:\/\/www.topfastpcb.com\/pt\/products\/hdi-pcb\/\">Placas HDI<\/a><\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>ENIG (planicidade superior)<\/li>\n\n<li>Controlo rigoroso da qualidade do n\u00edquel<\/li><\/ul><ul class=\"wp-block-list\"><li><strong><a href=\"https:\/\/www.topfastpcb.com\/pt\/products\/high-speed-pcb\/\">PCBs de alta velocidade<\/a><\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>OSP\/ENIG (melhor integridade do sinal)<\/li>\n\n<li>Evitar a superf\u00edcie irregular da HASL&amp;#8217<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Prototipagem<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>OSP (resposta mais r\u00e1pida)<\/li>\n\n<li>Assegurar a montagem atempada<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"43_Topfast_Capabilities\"><\/span>4.3 Capacidades Topfast<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Solu\u00e7\u00f5es completas de acabamento de superf\u00edcies:<\/p><ul class=\"wp-block-list\"><li>20 linhas HASL automatizadas (500.000\u33a1\/m\u00eas)<\/li>\n\n<li>10 linhas ENIG (uniformidade de espessura \u00b18%)<\/li>\n\n<li>5 linhas OSP (dispon\u00edvel com nano-refor\u00e7o)<\/li>\n\n<li>Inspe\u00e7\u00e3o 100% em linha (AOI+SPI)<\/li><\/ul><p><a href=\"https:\/\/www.topfastpcb.com\/pt\/contact\/\">Transferir o guia de sele\u00e7\u00e3o de acabamentos de superf\u00edcie para PCB<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Processo de nivelamento de HASL por ar quente, incluindo a composi\u00e7\u00e3o da liga, o fluxo do processo e as diferen\u00e7as de desempenho entre HASL com e sem chumbo. Uma an\u00e1lise detalhada das carater\u00edsticas e cen\u00e1rios de aplica\u00e7\u00e3o dos processos de galvanoplastia ENIG e anti-oxida\u00e7\u00e3o OSP. Como fabricante profissional de placas de circuito impresso, Topfast possui capacidades abrangentes de processo de tratamento de superf\u00edcie e um sistema de controlo de qualidade robusto, permitindo-nos fornecer solu\u00e7\u00f5es de tratamento de superf\u00edcie ideais para v\u00e1rios produtos electr\u00f3nicos.<\/p>","protected":false},"author":1,"featured_media":4136,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[112],"tags":[351,260],"class_list":["post-4135","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-hasl-processes","tag-pcb-manufacturing-process"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PCB HASL and Lead-Free HASL Processes - Topfastpcb<\/title>\n<meta name=\"description\" content=\"Topfast provides professional and reliable PCB manufacturing services. 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