{"id":8369,"date":"2026-03-12T08:55:00","date_gmt":"2026-03-12T00:55:00","guid":{"rendered":"https:\/\/topfastpcba.com\/?p=8369"},"modified":"2026-03-12T14:19:54","modified_gmt":"2026-03-12T06:19:54","slug":"stencil-design-optimization-smt-yield","status":"publish","type":"post","link":"https:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/","title":{"rendered":"\u062a\u062d\u0633\u064a\u0646 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0642\u0648\u0627\u0644\u0628 \u0644\u0625\u0646\u062a\u0627\u062c\u064a\u0629 SMT"},"content":{"rendered":"<p>\u0641\u064a \u062a\u062c\u0645\u064a\u0639 SMT\u060c \u062a\u0645\u062b\u0644 \u0637\u0628\u0627\u0639\u0629 \u0645\u0639\u062c\u0648\u0646 \u0627\u0644\u0644\u062d\u0627\u0645 \u063a\u0627\u0644\u0628\u064a\u0629 \u0639\u064a\u0648\u0628 \u0627\u0644\u0639\u0645\u0644\u064a\u0629.<\/p>\n\n\n\n<p>\u062a\u0634\u064a\u0631 \u0627\u0644\u062f\u0631\u0627\u0633\u0627\u062a \u0627\u0644\u062a\u064a \u0623\u062c\u0631\u064a\u062a \u0639\u0644\u0649 \u062e\u0637\u0648\u0637 \u0627\u0644\u0625\u0646\u062a\u0627\u062c \u0630\u0627\u062a \u0627\u0644\u062d\u062c\u0645 \u0627\u0644\u0643\u0628\u064a\u0631 \u0625\u0644\u0649 \u0623\u0646 \u0623\u0643\u062b\u0631 \u0645\u0646 60\u066a \u0645\u0646 \u0639\u064a\u0648\u0628 \u0627\u0644\u062a\u062c\u0645\u064a\u0639 \u062a\u0646\u0634\u0623 \u0639\u0646 \u0645\u0634\u0627\u0643\u0644 \u0641\u064a \u0645\u0631\u062d\u0644\u0629 \u0627\u0644\u0637\u0628\u0627\u0639\u0629.<\/p>\n\n\n\n<p>\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0627\u0633\u062a\u0646\u0633\u0644 \u064a\u0624\u062b\u0631 \u0628\u0634\u0643\u0644 \u0645\u0628\u0627\u0634\u0631 \u0639\u0644\u0649:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u062d\u062c\u0645 \u0627\u0644\u0644\u062d\u0627\u0645<\/li>\n\n\n\n<li>\u0643\u0641\u0627\u0621\u0629 \u0625\u0641\u0631\u0627\u0632 \u0627\u0644\u0644\u0635\u0642<\/li>\n\n\n\n<li>\u0627\u0644\u062a\u062c\u0633\u064a\u0631 \u0648\u0627\u0644\u062a\u0631\u0645\u064a\u0632<\/li>\n\n\n\n<li>\u0645\u0648\u062b\u0648\u0642\u064a\u0629 BGA<\/li>\n\n\n\n<li>\u0627\u0644\u0639\u0627\u0626\u062f \u0627\u0644\u0625\u062c\u0645\u0627\u0644\u064a \u0644\u0640 SMT<\/li>\n<\/ul>\n\n\n\n<p>Optimizing stencil design is not optional\u2014it is fundamental to stable PCBA production.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_75 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\">\u062c\u062f\u0648\u0644 \u0627\u0644\u0645\u062d\u062a\u0648\u064a\u0627\u062a<\/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:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/#Why_Stencil_Design_Matters_More_Than_You_Think\" >\u0644\u0645\u0627\u0630\u0627 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0642\u0648\u0627\u0644\u0628 \u0623\u0643\u062b\u0631 \u0623\u0647\u0645\u064a\u0629 \u0645\u0645\u0627 \u062a\u0639\u062a\u0642\u062f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/#Key_Parameters_in_Stencil_Design\" >\u0627\u0644\u0645\u0639\u0644\u0645\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629 \u0641\u064a \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0642\u0648\u0627\u0644\u0628<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/#1_Stencil_Thickness\" >1. \u0633\u0645\u0627\u0643\u0629 \u0627\u0644\u0627\u0633\u062a\u0646\u0633\u0644<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/#2_Aperture_Area_Ratio_Critical_for_Paste_Release\" >2. \u0646\u0633\u0628\u0629 \u0645\u0633\u0627\u062d\u0629 \u0627\u0644\u0641\u062a\u062d\u0629 (\u0645\u0647\u0645\u0629 \u0644\u0625\u0637\u0644\u0627\u0642 \u0627\u0644\u0645\u0639\u062c\u0648\u0646)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/#3_Aspect_Ratio\" >3. \u0646\u0633\u0628\u0629 \u0627\u0644\u0639\u0631\u0636 \u0625\u0644\u0649 \u0627\u0644\u0627\u0631\u062a\u0641\u0627\u0639<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/#Aperture_Design_Strategies\" >\u0627\u0633\u062a\u0631\u0627\u062a\u064a\u062c\u064a\u0627\u062a \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0641\u062a\u062d\u0629<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/#Common_Modifications\" >\u0627\u0644\u062a\u0639\u062f\u064a\u0644\u0627\u062a \u0627\u0644\u0634\u0627\u0626\u0639\u0629<\/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:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/#Step_Stencil_for_Mixed_Technology_Boards\" >\u0642\u0627\u0644\u0628 \u062e\u0637\u0648\u0627\u062a \u0644\u0644\u0648\u062d\u0627\u062a \u0627\u0644\u062a\u0643\u0646\u0648\u0644\u0648\u062c\u064a\u0627 \u0627\u0644\u0645\u062e\u062a\u0644\u0637\u0629<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/#Nano-Coating_and_Surface_Finish\" >\u0627\u0644\u0637\u0644\u0627\u0621 \u0627\u0644\u0646\u0627\u0646\u0648\u064a \u0648\u062a\u0634\u0637\u064a\u0628 \u0627\u0644\u0623\u0633\u0637\u062d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/#Printing_Defects_Related_to_Poor_Stencil_Design\" >\u0639\u064a\u0648\u0628 \u0627\u0644\u0637\u0628\u0627\u0639\u0629 \u0627\u0644\u0645\u062a\u0639\u0644\u0642\u0629 \u0628\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0627\u0633\u062a\u0646\u0633\u0644 \u0627\u0644\u0633\u064a\u0626<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/#Stencil_Optimization_for_BGA_Yield\" >\u062a\u062d\u0633\u064a\u0646 \u0627\u0644\u0627\u0633\u062a\u0646\u0633\u0644 \u0644\u0625\u0646\u062a\u0627\u062c\u064a\u0629 BGA<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/#Data-Driven_Optimization\" >\u0627\u0644\u062a\u062d\u0633\u064a\u0646 \u0627\u0644\u0642\u0627\u0626\u0645 \u0639\u0644\u0649 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/#Design_Collaboration_Between_Fabrication_and_Assembly\" >\u0627\u0644\u062a\u0639\u0627\u0648\u0646 \u0641\u064a \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0628\u064a\u0646 \u0627\u0644\u062a\u0635\u0646\u064a\u0639 \u0648\u0627\u0644\u062a\u062c\u0645\u064a\u0639<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/#Frequently_Asked_Questions_FAQ\" >\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629 (FAQ)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/topfastpcba.com\/ar\/stencil-design-optimization-smt-yield\/#Conclusion\" >\u0627\u0644\u062e\u0627\u062a\u0645\u0629<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Stencil_Design_Matters_More_Than_You_Think\"><\/span>\u0644\u0645\u0627\u0630\u0627 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0642\u0648\u0627\u0644\u0628 \u0623\u0643\u062b\u0631 \u0623\u0647\u0645\u064a\u0629 \u0645\u0645\u0627 \u062a\u0639\u062a\u0642\u062f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u0623\u062b\u0646\u0627\u0621 \u0625\u0639\u0627\u062f\u0629 \u0627\u0644\u062a\u062f\u0641\u0642\u060c \u062a\u0639\u062a\u0645\u062f \u0647\u0646\u062f\u0633\u0629 \u0648\u0635\u0644\u0629 \u0627\u0644\u0644\u062d\u0627\u0645 \u0643\u0644\u064a\u064b\u0627 \u0639\u0644\u0649 \u062d\u062c\u0645 \u0627\u0644\u0645\u0639\u062c\u0648\u0646 \u0627\u0644\u0645\u0648\u062f\u0639 \u0623\u062b\u0646\u0627\u0621 \u0627\u0644\u0637\u0628\u0627\u0639\u0629.<\/p>\n\n\n\n<p>\u0625\u0630\u0627 \u0643\u0627\u0646 \u062d\u062c\u0645 \u0627\u0644\u0645\u0639\u062c\u0648\u0646:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Too much \u2192 bridging, solder balls<\/li>\n\n\n\n<li>Too little \u2192 insufficient wetting, head-in-pillow<\/li>\n\n\n\n<li>Uneven \u2192 open circuits<\/li>\n<\/ul>\n\n\n\n<p>\u0627\u062a\u0633\u0627\u0642 \u0627\u0644\u0637\u0628\u0627\u0639\u0629 \u0647\u0648 \u0623\u0633\u0627\u0633 \u0627\u0644\u0645\u0648\u062b\u0648\u0642\u064a\u0629.<\/p>\n\n\n\n<p>\u064a\u0635\u0628\u062d \u0647\u0630\u0627 \u0623\u0645\u0631\u064b\u0627 \u0628\u0627\u0644\u063a \u0627\u0644\u0623\u0647\u0645\u064a\u0629 \u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0644\u0623\u062c\u0647\u0632\u0629 \u0630\u0627\u062a \u0627\u0644\u0645\u0633\u0627\u0641\u0627\u062a \u0627\u0644\u062f\u0642\u064a\u0642\u0629 \u0648\u0623\u062c\u0647\u0632\u0629 BGA \u0627\u0644\u062a\u064a \u062a\u0645\u062a \u0645\u0646\u0627\u0642\u0634\u062a\u0647\u0627 \u0641\u064a: <a href=\"https:\/\/topfastpcba.com\/ar\/bga-solder-joint-reliability\/\">\u0645\u0648\u062b\u0648\u0642\u064a\u0629 \u0648\u0635\u0644\u0627\u062a \u0627\u0644\u0644\u062d\u0627\u0645 bga<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Key_Parameters_in_Stencil_Design\"><\/span>\u0627\u0644\u0645\u0639\u0644\u0645\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629 \u0641\u064a \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0642\u0648\u0627\u0644\u0628<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Stencil_Thickness\"><\/span>1. \u0633\u0645\u0627\u0643\u0629 \u0627\u0644\u0627\u0633\u062a\u0646\u0633\u0644<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u064a\u062d\u062f\u062f \u0633\u0645\u0643 \u0627\u0644\u0627\u0633\u062a\u0646\u0633\u0644 \u062d\u062c\u0645 \u0645\u0639\u062c\u0648\u0646 \u0627\u0644\u0644\u062d\u0627\u0645.<\/p>\n\n\n\n<p>\u0627\u0644\u0633\u0645\u0627\u0643\u0629 \u0627\u0644\u0646\u0645\u0648\u0630\u062c\u064a\u0629:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>0.10 mm (4 mil) \u2013 fine pitch<\/li>\n\n\n\n<li>0.12 mm (5 mil) \u2013 general SMT<\/li>\n\n\n\n<li>0.15 mm (6 mil) \u2013 larger components<\/li>\n<\/ul>\n\n\n\n<p>\u0627\u0633\u062a\u0646\u0633\u0644 \u0623\u0643\u062b\u0631 \u0633\u0645\u0643\u064b\u0627 = \u062d\u062c\u0645 \u0623\u0643\u0628\u0631<br>\u0644\u0643\u0646 \u0627\u0644\u0633\u0645\u0627\u0643\u0629 \u0627\u0644\u0632\u0627\u0626\u062f\u0629 \u062a\u0642\u0644\u0644 \u0645\u0646 \u0627\u0646\u0633\u064a\u0627\u0628 \u0627\u0644\u0645\u0639\u062c\u0648\u0646 \u0641\u064a \u0627\u0644\u0641\u062a\u062d\u0627\u062a \u0627\u0644\u062f\u0642\u064a\u0642\u0629.<\/p>\n\n\n\n<p>\u0627\u0644\u062a\u0648\u0627\u0632\u0646 \u0623\u0645\u0631 \u0628\u0627\u0644\u063a \u0627\u0644\u0623\u0647\u0645\u064a\u0629.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Aperture_Area_Ratio_Critical_for_Paste_Release\"><\/span>2. \u0646\u0633\u0628\u0629 \u0645\u0633\u0627\u062d\u0629 \u0627\u0644\u0641\u062a\u062d\u0629 (\u0645\u0647\u0645\u0629 \u0644\u0625\u0637\u0644\u0627\u0642 \u0627\u0644\u0645\u0639\u062c\u0648\u0646)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0635\u064a\u063a\u0629 \u0646\u0633\u0628\u0629 \u0627\u0644\u0645\u0633\u0627\u062d\u0629: <math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" display=\"block\"><semantics><mrow><mi>A<\/mi><mi>r<\/mi><mi>e<\/mi><mi>a<\/mi><mi>R<\/mi><mi>a<\/mi><mi>t<\/mi><mi>i<\/mi><mi>o<\/mi><mo>=<\/mo><mo stretchy=\"false\">(<\/mo><mi>A<\/mi><mi>p<\/mi><mi>e<\/mi><mi>r<\/mi><mi>t<\/mi><mi>u<\/mi><mi>r<\/mi><mi>e<\/mi><mi>o<\/mi><mi>p<\/mi><mi>e<\/mi><mi>n<\/mi><mi>i<\/mi><mi>n<\/mi><mi>g<\/mi><mi>a<\/mi><mi>r<\/mi><mi>e<\/mi><mi>a<\/mi><mo stretchy=\"false\">)<\/mo><mi mathvariant=\"normal\">\/<\/mi><mo stretchy=\"false\">(<\/mo><mi>A<\/mi><mi>p<\/mi><mi>e<\/mi><mi>r<\/mi><mi>t<\/mi><mi>u<\/mi><mi>r<\/mi><mi>e<\/mi><mi>w<\/mi><mi>a<\/mi><mi>l<\/mi><mi>l<\/mi><mi>a<\/mi><mi>r<\/mi><mi>e<\/mi><mi>a<\/mi><mo stretchy=\"false\">)<\/mo><\/mrow><annotation encoding=\"application\/x-tex\">\u0646\u0633\u0628\u0629 \u0627\u0644\u0645\u0633\u0627\u062d\u0629 = (\u0645\u0633\u0627\u062d\u0629 \u0641\u062a\u062d\u0629 \u0627\u0644\u0641\u062a\u062d\u0629) \/ (\u0645\u0633\u0627\u062d\u0629 \u062c\u062f\u0627\u0631 \u0627\u0644\u0641\u062a\u062d\u0629)<\/annotation><\/semantics><\/math>\u0644\u0625\u0632\u0627\u0644\u0629 \u0627\u0644\u0645\u0639\u062c\u0648\u0646 \u0628\u0634\u0643\u0644 \u0645\u0648\u062b\u0648\u0642:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Recommended \u2265 0.66<\/li>\n\n\n\n<li>Below 0.6 \u2192 high risk of incomplete release<\/li>\n<\/ul>\n\n\n\n<p>\u064a\u0635\u0628\u062d \u0647\u0630\u0627 \u0627\u0644\u0623\u0645\u0631 \u0628\u0627\u0644\u063a \u0627\u0644\u0623\u0647\u0645\u064a\u0629 \u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0625\u0644\u0649:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>BGA \u0628\u0645\u0633\u0627\u0641\u0629 0.4 \u0645\u0645<\/li>\n\n\n\n<li>\u0648\u0633\u0627\u062f\u0627\u062a \u0645\u0631\u0643\u0632\u064a\u0629 QFN<\/li>\n\n\n\n<li>\u0645\u0643\u0648\u0646\u0627\u062a \u0633\u0644\u0628\u064a\u0629 \u062f\u0642\u064a\u0642\u0629 (0201\u060c 01005)<\/li>\n<\/ul>\n\n\n\n<p>\u062a\u0624\u062f\u064a \u0646\u0633\u0628\u0629 \u0627\u0644\u0645\u0633\u0627\u062d\u0629 \u0627\u0644\u0636\u0639\u064a\u0641\u0629 \u0625\u0644\u0649 \u0639\u062f\u0645 \u0627\u062a\u0633\u0627\u0642 \u0627\u0644\u0648\u0635\u0644\u0627\u062a \u0648\u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0645\u062d\u0635\u0648\u0644.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Aspect_Ratio\"><\/span>3. \u0646\u0633\u0628\u0629 \u0627\u0644\u0639\u0631\u0636 \u0625\u0644\u0649 \u0627\u0644\u0627\u0631\u062a\u0641\u0627\u0639<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0646\u0633\u0628\u0629 \u0627\u0644\u0639\u0631\u0636 \u0625\u0644\u0649 \u0627\u0644\u0627\u0631\u062a\u0641\u0627\u0639: <math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" display=\"block\"><semantics><mrow><mi>A<\/mi><mi>s<\/mi><mi>p<\/mi><mi>e<\/mi><mi>c<\/mi><mi>t<\/mi><mi>R<\/mi><mi>a<\/mi><mi>t<\/mi><mi>i<\/mi><mi>o<\/mi><mo>=<\/mo><mi>A<\/mi><mi>p<\/mi><mi>e<\/mi><mi>r<\/mi><mi>t<\/mi><mi>u<\/mi><mi>r<\/mi><mi>e<\/mi><mi>w<\/mi><mi>i<\/mi><mi>d<\/mi><mi>t<\/mi><mi>h<\/mi><mi mathvariant=\"normal\">\/<\/mi><mi>S<\/mi><mi>t<\/mi><mi>e<\/mi><mi>n<\/mi><mi>c<\/mi><mi>i<\/mi><mi>l<\/mi><mi>t<\/mi><mi>h<\/mi><mi>i<\/mi><mi>c<\/mi><mi>k<\/mi><mi>n<\/mi><mi>e<\/mi><mi>s<\/mi><mi>s<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\u0646\u0633\u0628\u0629 \u0627\u0644\u0639\u0631\u0636 \u0625\u0644\u0649 \u0627\u0644\u0627\u0631\u062a\u0641\u0627\u0639 = \u0639\u0631\u0636 \u0627\u0644\u0641\u062a\u062d\u0629 \/ \u0633\u0645\u0627\u0643\u0629 \u0627\u0644\u0627\u0633\u062a\u0646\u0633\u0644<\/annotation><\/semantics><\/math>\u0645\u0648\u0635\u0649 \u0628\u0647:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u2265 1.5 for stable release<\/li>\n<\/ul>\n\n\n\n<p>\u062a\u0642\u0644\u0644 \u0646\u0633\u0628\u0629 \u0627\u0644\u0639\u0631\u0636 \u0625\u0644\u0649 \u0627\u0644\u0627\u0631\u062a\u0641\u0627\u0639 \u0645\u0646 \u0627\u0644\u062a\u0635\u0627\u0642 \u0627\u0644\u0645\u0639\u062c\u0648\u0646 \u062f\u0627\u062e\u0644 \u0627\u0644\u0641\u062a\u062d\u0627\u062a.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"505\" src=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2026\/03\/SMT-Yield.jpg\" alt=\"\u0639\u0627\u0626\u062f SMT\" class=\"wp-image-8370\" srcset=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2026\/03\/SMT-Yield.jpg 600w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2026\/03\/SMT-Yield-300x253.jpg 300w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2026\/03\/SMT-Yield-14x12.jpg 14w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2026\/03\/SMT-Yield-150x126.jpg 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Aperture_Design_Strategies\"><\/span>\u0627\u0633\u062a\u0631\u0627\u062a\u064a\u062c\u064a\u0627\u062a \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0641\u062a\u062d\u0629<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u062a\u062d\u0633\u064a\u0646 \u0627\u0644\u0627\u0633\u062a\u0646\u0633\u0644 \u0644\u0627 \u064a\u0642\u062a\u0635\u0631 \u0641\u0642\u0637 \u0639\u0644\u0649 \u0627\u0644\u0633\u0645\u0627\u0643\u0629.<\/p>\n\n\n\n<p>\u064a\u062a\u0639\u0644\u0642 \u0627\u0644\u0623\u0645\u0631 \u0628\u062a\u0639\u062f\u064a\u0644 \u0647\u0646\u062f\u0633\u0629 \u0627\u0644\u0641\u062a\u062d\u0629.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Modifications\"><\/span>\u0627\u0644\u062a\u0639\u062f\u064a\u0644\u0627\u062a \u0627\u0644\u0634\u0627\u0626\u0639\u0629<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u062a\u0642\u0644\u064a\u0644 \u062d\u062c\u0645 \u0627\u0644\u0641\u062a\u062d\u0629 (\u0644\u0645\u0646\u0639 \u0627\u0644\u062a\u0648\u0635\u064a\u0644)<\/li>\n\n\n\n<li>\u062a\u0635\u0645\u064a\u0645 \u0644\u0648\u062d\u0629 \u0627\u0644\u0645\u0646\u0632\u0644 (\u0644\u0645\u0643\u0648\u0646\u0627\u062a \u0627\u0644\u0631\u0642\u0627\u0626\u0642)<\/li>\n\n\n\n<li>\u062a\u0635\u0645\u064a\u0645 \u0632\u062c\u0627\u062c \u0627\u0644\u0646\u0627\u0641\u0630\u0629 (\u0644\u0644\u0648\u0633\u0627\u062f\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u064a\u0629 \u0627\u0644\u0643\u0628\u064a\u0631\u0629)<\/li>\n\n\n\n<li>\u0632\u0648\u0627\u064a\u0627 \u0645\u0633\u062a\u062f\u064a\u0631\u0629 (\u062a\u062d\u0633\u064a\u0646 \u0627\u0644\u0625\u0635\u062f\u0627\u0631)<\/li>\n<\/ul>\n\n\n\n<p>\u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0644\u0648\u0633\u0627\u062f\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u064a\u0629 QFN:<\/p>\n\n\n\n<p>\u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u0641\u062a\u062d\u0629 \u0648\u0627\u062d\u062f\u0629 \u0643\u0628\u064a\u0631\u0629\u060c \u0627\u0633\u062a\u062e\u062f\u0645 \u0641\u062a\u062d\u0627\u062a \u0646\u0648\u0627\u0641\u0630 \u0645\u0642\u0633\u0645\u0629 \u0625\u0644\u0649:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u062a\u0642\u0644\u064a\u0644 \u0627\u0644\u062a\u0628\u0648\u0644<\/li>\n\n\n\n<li>\u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u062d\u062c\u0645 \u0627\u0644\u0645\u0639\u062c\u0648\u0646<\/li>\n\n\n\n<li>\u062a\u062d\u0633\u064a\u0646 \u0627\u0644\u0627\u0633\u062a\u0648\u0627\u0621<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_Stencil_for_Mixed_Technology_Boards\"><\/span>\u0642\u0627\u0644\u0628 \u062e\u0637\u0648\u0627\u062a \u0644\u0644\u0648\u062d\u0627\u062a \u0627\u0644\u062a\u0643\u0646\u0648\u0644\u0648\u062c\u064a\u0627 \u0627\u0644\u0645\u062e\u062a\u0644\u0637\u0629<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u0639\u0646\u062f\u0645\u0627 \u062a\u062d\u062a\u0648\u064a \u0627\u0644\u0644\u0648\u062d\u0627\u062a \u0639\u0644\u0649:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u062f\u0648\u0627\u0626\u0631 \u0645\u062a\u0643\u0627\u0645\u0644\u0629 \u0630\u0627\u062a \u0645\u0633\u0627\u0641\u0629 \u062f\u0642\u064a\u0642\u0629<\/li>\n\n\n\n<li>\u0645\u0648\u0635\u0644\u0627\u062a \u0643\u0628\u064a\u0631\u0629<\/li>\n\n\n\n<li>\u0645\u0643\u0648\u0646\u0627\u062a \u062b\u0642\u0628\u064a\u0629<\/li>\n<\/ul>\n\n\n\n<p>\u0627\u0644\u0633\u0645\u0643 \u0627\u0644\u0645\u0648\u062d\u062f \u0644\u0627 \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u0644\u0628\u064a \u062c\u0645\u064a\u0639 \u0627\u0644\u0627\u062d\u062a\u064a\u0627\u062c\u0627\u062a.<\/p>\n\n\n\n<p>\u064a\u0648\u0641\u0631 \u0627\u0644\u0642\u0627\u0644\u0628 \u0627\u0644\u0645\u062a\u062f\u0631\u062c:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0645\u0646\u0627\u0637\u0642 \u0623\u0631\u0642 \u0644\u062e\u0637\u0648\u0629 \u062f\u0642\u064a\u0642\u0629<\/li>\n\n\n\n<li>\u0645\u0646\u0627\u0637\u0642 \u0623\u0643\u062b\u0631 \u0633\u0645\u0643\u064b\u0627 \u0644\u0645\u0641\u0627\u0635\u0644 \u0627\u0644\u0644\u062d\u0627\u0645 \u0627\u0644\u0643\u0628\u064a\u0631\u0629<\/li>\n<\/ul>\n\n\n\n<p>\u0648\u0647\u0630\u0627 \u064a\u062a\u064a\u062d \u0627\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u0639\u0627\u0626\u062f \u0623\u0641\u0636\u0644 \u0639\u0628\u0631 \u0627\u0644\u062a\u062c\u0645\u064a\u0639\u0627\u062a \u0627\u0644\u0645\u062e\u062a\u0644\u0637\u0629.<\/p>\n\n\n\n<p>\u062a\u0639\u062a\u0628\u0631 \u0642\u0648\u0627\u0644\u0628 \u0627\u0644\u062e\u0637\u0648\u0627\u062a \u0645\u0641\u064a\u062f\u0629 \u0628\u0634\u0643\u0644 \u062e\u0627\u0635 \u0641\u064a \u0635\u0646\u0627\u0639\u0629 \u0627\u0644\u0633\u064a\u0627\u0631\u0627\u062a \u0648\u0635\u0646\u0627\u0639\u0629 PCBA \u0627\u0644\u0635\u0646\u0627\u0639\u064a\u0629.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Nano-Coating_and_Surface_Finish\"><\/span>\u0627\u0644\u0637\u0644\u0627\u0621 \u0627\u0644\u0646\u0627\u0646\u0648\u064a \u0648\u062a\u0634\u0637\u064a\u0628 \u0627\u0644\u0623\u0633\u0637\u062d<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u063a\u0627\u0644\u0628\u064b\u0627 \u0645\u0627 \u062a\u0633\u062a\u062e\u062f\u0645 \u0627\u0644\u0642\u0648\u0627\u0644\u0628 \u0627\u0644\u062d\u062f\u064a\u062b\u0629 \u0637\u0644\u0627\u0621 \u0646\u0627\u0646\u0648\u064a \u0645\u0646 \u0623\u062c\u0644:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u062a\u062d\u0633\u064a\u0646 \u0625\u062e\u0631\u0627\u062c \u0627\u0644\u0645\u0639\u062c\u0648\u0646<\/li>\n\n\n\n<li>\u062a\u0642\u0644\u064a\u0644 \u062a\u0643\u0631\u0627\u0631 \u0627\u0644\u062a\u0646\u0638\u064a\u0641<\/li>\n\n\n\n<li>\u062a\u062d\u0633\u064a\u0646 \u0627\u062a\u0633\u0627\u0642 \u0627\u0644\u0637\u0628\u0627\u0639\u0629<\/li>\n<\/ul>\n\n\n\n<p>\u064a\u0624\u062f\u064a \u0627\u0644\u0625\u0635\u062f\u0627\u0631 \u0627\u0644\u0623\u0641\u0636\u0644 \u0625\u0644\u0649 \u062a\u062d\u0633\u064a\u0646 \u0627\u0644\u0627\u062a\u0633\u0627\u0642 \u0648\u062a\u0642\u0644\u064a\u0644 \u0627\u0644\u0639\u064a\u0648\u0628\u060c \u0645\u062b\u0644:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0644\u062d\u0627\u0645 \u063a\u064a\u0631 \u0643\u0627\u0641\u064d<\/li>\n\n\n\n<li>\u0627\u0644\u062a\u062c\u0633\u064a\u0631<\/li>\n\n\n\n<li>\u062a\u0648\u0645\u0628\u0633\u062a\u0648\u0646\u064a\u0646\u063a<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Printing_Defects_Related_to_Poor_Stencil_Design\"><\/span>\u0639\u064a\u0648\u0628 \u0627\u0644\u0637\u0628\u0627\u0639\u0629 \u0627\u0644\u0645\u062a\u0639\u0644\u0642\u0629 \u0628\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0627\u0633\u062a\u0646\u0633\u0644 \u0627\u0644\u0633\u064a\u0626<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u064a\u0633\u0627\u0647\u0645 \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u063a\u064a\u0631 \u0627\u0644\u0633\u0644\u064a\u0645 \u0644\u0644\u0627\u0633\u062a\u0646\u0633\u0644 \u0641\u064a:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u062c\u0633\u0631 \u0627\u0644\u0644\u062d\u0627\u0645<\/li>\n\n\n\n<li>\u062a\u0648\u0645\u0628\u0633\u062a\u0648\u0646\u064a\u0646\u063a<\/li>\n\n\n\n<li>\u0627\u0644\u0631\u0623\u0633 \u0639\u0644\u0649 \u0627\u0644\u0648\u0633\u0627\u062f\u0629<\/li>\n\n\n\n<li>\u0627\u0644\u0625\u0641\u0631\u0627\u063a<\/li>\n\n\n\n<li>\u0643\u0631\u0627\u062a \u0627\u0644\u0644\u062d\u0627\u0645<\/li>\n\n\n\n<li>\u0648\u0635\u0644\u0627\u062a \u0644\u062d\u0627\u0645 \u063a\u064a\u0631 \u0643\u0627\u0641\u064a\u0629<\/li>\n<\/ul>\n\n\n\n<p>\u064a\u064f\u0646\u0633\u0628 \u0627\u0644\u0639\u062f\u064a\u062f \u0645\u0646 \u0647\u0630\u0647 \u0627\u0644\u0639\u064a\u0648\u0628 \u062e\u0637\u0623\u064b \u0625\u0644\u0649 \u0645\u0644\u0641 \u0625\u0639\u0627\u062f\u0629 \u0627\u0644\u062a\u062f\u0641\u0642\u060c \u0641\u064a \u062d\u064a\u0646 \u0623\u0646 \u0627\u0644\u0633\u0628\u0628 \u0627\u0644\u062c\u0630\u0631\u064a \u063a\u0627\u0644\u0628\u0627\u064b \u0645\u0627 \u064a\u0646\u0634\u0623 \u0641\u064a \u0645\u0631\u062d\u0644\u0629 \u0627\u0644\u0637\u0628\u0627\u0639\u0629.<\/p>\n\n\n\n<p>\u0645\u0646 \u0627\u0644\u0645\u0647\u0645 \u0623\u064a\u0636\u064b\u0627 \u0641\u0647\u0645 \u062a\u0641\u0627\u0639\u0644 \u0627\u0644\u0627\u0644\u062a\u0648\u0627\u0621 \u0623\u062b\u0646\u0627\u0621 \u0625\u0639\u0627\u062f\u0629 \u0627\u0644\u062a\u062f\u0641\u0642: <a href=\"https:\/\/topfastpcba.com\/ar\/pcb-warpage-reflow-deformation\/\">\u062a\u0634\u0648\u0647 \u0625\u0639\u0627\u062f\u0629 \u062a\u062f\u0641\u0642 \u0627\u0646\u062d\u0646\u0627\u0621 \u0644\u0648\u062d\u0627\u062a \u0627\u0644\u062f\u0648\u0627\u0626\u0631 \u0627\u0644\u0645\u0637\u0628\u0648\u0639\u0629<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Stencil_Optimization_for_BGA_Yield\"><\/span>\u062a\u062d\u0633\u064a\u0646 \u0627\u0644\u0627\u0633\u062a\u0646\u0633\u0644 \u0644\u0625\u0646\u062a\u0627\u062c\u064a\u0629 BGA<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0640 BGA:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Aperture reduction 5\u201310% is common<\/li>\n\n\n\n<li>\u064a\u0644\u0632\u0645 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0645\u0639\u062c\u0648\u0646 \u0645\u0646 \u0627\u0644\u0646\u0648\u0639 4 \u0623\u0648 \u0627\u0644\u0646\u0648\u0639 5 \u0644\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u062f\u0642\u0629 \u0639\u0627\u0644\u064a\u0629<\/li>\n\n\n\n<li>\u064a\u0644\u0632\u0645 \u0627\u0644\u062a\u062d\u0643\u0645 \u0627\u0644\u0635\u0627\u0631\u0645 \u0641\u064a \u0646\u0633\u0628\u0629 \u0627\u0644\u0645\u0633\u0627\u062d\u0629<\/li>\n\n\n\n<li>\u0644\u0648\u062d\u0629 PCB \u0645\u0633\u0637\u062d\u0629 \u0645\u0637\u0644\u0648\u0628\u0629 \u0644\u0645\u0646\u0639 \u0631\u0623\u0633 \u0641\u064a \u0627\u0644\u0648\u0633\u0627\u062f\u0629<\/li>\n<\/ul>\n\n\n\n<p>\u064a\u0639\u0645\u0644 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0642\u0627\u0644\u0628 \u0648\u062a\u0633\u0637\u064a\u062d PCB \u0645\u0639\u064b\u0627 \u0644\u0636\u0645\u0627\u0646 \u0627\u0644\u0645\u0648\u062b\u0648\u0642\u064a\u0629.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Data-Driven_Optimization\"><\/span>\u0627\u0644\u062a\u062d\u0633\u064a\u0646 \u0627\u0644\u0642\u0627\u0626\u0645 \u0639\u0644\u0649 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u062a\u0639\u062a\u0645\u062f \u0627\u0644\u0634\u0631\u0643\u0627\u062a \u0627\u0644\u0645\u0635\u0646\u0639\u0629 \u0639\u0627\u0644\u064a\u0629 \u0627\u0644\u0625\u0646\u062a\u0627\u062c\u064a\u0629 \u0639\u0644\u0649:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SPI (\u0641\u062d\u0635 \u0644\u0635\u0642 \u0627\u0644\u0644\u062d\u0627\u0645 (SPI))<\/li>\n\n\n\n<li>\u0627\u0644\u062a\u062d\u0643\u0645 \u0627\u0644\u0625\u062d\u0635\u0627\u0626\u064a \u0641\u064a \u0627\u0644\u0639\u0645\u0644\u064a\u0627\u062a (SPC)<\/li>\n\n\n\n<li>\u0645\u0631\u0627\u0642\u0628\u0629 Cp\/Cpk<\/li>\n\n\n\n<li>\u062a\u062d\u0633\u064a\u0646 \u0627\u0644\u0641\u062a\u062d\u0629 \u0627\u0644\u0645\u0633\u062a\u0645\u0631<\/li>\n<\/ul>\n\n\n\n<p>Printing variation must be quantified\u2014not guessed.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"545\" src=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2026\/03\/SMT-Yield-1.jpg\" alt=\"\u0639\u0627\u0626\u062f SMT\" class=\"wp-image-8371\" srcset=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2026\/03\/SMT-Yield-1.jpg 600w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2026\/03\/SMT-Yield-1-300x273.jpg 300w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2026\/03\/SMT-Yield-1-13x12.jpg 13w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2026\/03\/SMT-Yield-1-150x136.jpg 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Design_Collaboration_Between_Fabrication_and_Assembly\"><\/span>\u0627\u0644\u062a\u0639\u0627\u0648\u0646 \u0641\u064a \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0628\u064a\u0646 \u0627\u0644\u062a\u0635\u0646\u064a\u0639 \u0648\u0627\u0644\u062a\u062c\u0645\u064a\u0639<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u064a\u0628\u062f\u0623 \u062a\u062d\u0633\u064a\u0646 \u0627\u0644\u0639\u0627\u0626\u062f \u0642\u0628\u0644 \u0627\u0644\u062a\u062c\u0645\u064a\u0639.<\/p>\n\n\n\n<p>\u062a\u0624\u062b\u0631 \u062a\u0646\u0627\u0638\u0631 \u062a\u0631\u0627\u0635 PCB \u0648\u062a\u0648\u0627\u0632\u0646 \u0627\u0644\u0646\u062d\u0627\u0633 \u0639\u0644\u0649 \u0633\u0644\u0648\u0643 \u0627\u0644\u0627\u0644\u062a\u0648\u0627\u0621 \u0623\u062b\u0646\u0627\u0621 \u0625\u0639\u0627\u062f\u0629 \u0627\u0644\u062a\u062f\u0641\u0642:<\/p>\n\n\n\n<p><a href=\"https:\/\/topfastpcba.com\/ar\/pcb-manufacturing-processes-2\/\">\u0639\u0645\u0644\u064a\u0629 \u062a\u0635\u0646\u064a\u0639 \u062b\u0646\u0627\u0626\u064a \u0627\u0644\u0641\u064a\u0646\u064a\u0644 \u0645\u062a\u0639\u062f\u062f \u0627\u0644\u0643\u0644\u0648\u0631<br><\/a><a href=\"https:\/\/topfastpcba.com\/ar\/pcb-manufacturing-tolerances\/\">\u062a\u0641\u0627\u0648\u062a\u0627\u062a \u062a\u0635\u0646\u064a\u0639 \u062b\u0646\u0627\u0626\u064a \u0627\u0644\u0641\u064a\u0646\u064a\u0644 \u0645\u062a\u0639\u062f\u062f \u0627\u0644\u0643\u0644\u0648\u0631<\/a><\/p>\n\n\n\n<p>\u062a\u0624\u062b\u0631 \u062c\u0648\u062f\u0629 \u0627\u0644\u062a\u0635\u0646\u064a\u0639 \u0639\u0644\u0649 \u0625\u0646\u062a\u0627\u062c\u064a\u0629 \u0627\u0644\u062a\u062c\u0645\u064a\u0639.<\/p>\n\n\n\n<p>\u064a\u062a\u0637\u0644\u0628 \u0646\u062c\u0627\u062d PCBA \u0647\u0646\u062f\u0633\u0629 \u0645\u062a\u0643\u0627\u0645\u0644\u0629.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions_FAQ\"><\/span>\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629 (FAQ)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1772590092447\"><strong class=\"schema-faq-question\">\u0633: \u0645\u0627 \u0647\u0648 \u0627\u0644\u0633\u0628\u0628 \u0627\u0644\u0623\u0643\u062b\u0631 \u0634\u064a\u0648\u0639\u064b\u0627 \u0644\u0639\u064a\u0648\u0628 SMT\u061f<\/strong> <p class=\"schema-faq-answer\">\u062c: \u062a\u0639\u062f \u062a\u0642\u0644\u0628\u0627\u062a \u0637\u0628\u0627\u0639\u0629 \u0645\u0639\u062c\u0648\u0646 \u0627\u0644\u0644\u062d\u0627\u0645 \u0623\u0643\u0628\u0631 \u0639\u0627\u0645\u0644 \u064a\u0633\u0627\u0647\u0645 \u0641\u064a \u062d\u062f\u0648\u062b \u0639\u064a\u0648\u0628 \u0627\u0644\u062a\u062c\u0645\u064a\u0639.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1772590103863\"><strong class=\"schema-faq-question\">\u0633: \u0647\u0644 \u0627\u0644\u0627\u0633\u062a\u0646\u0633\u0644 \u0627\u0644\u0623\u0631\u0642 \u062f\u0627\u0626\u0645\u064b\u0627 \u0623\u0641\u0636\u0644 \u0644\u0644\u062e\u0637\u0648\u0637 \u0627\u0644\u062f\u0642\u064a\u0642\u0629\u061f<\/strong> <p class=\"schema-faq-answer\">\u062c: \u0644\u064a\u0633 \u062f\u0627\u0626\u0645\u064b\u0627. \u0642\u062f \u064a\u0624\u062f\u064a \u0627\u0644\u0646\u062d\u0627\u0641\u0629 \u0627\u0644\u0645\u0641\u0631\u0637\u0629 \u0625\u0644\u0649 \u062a\u0642\u0644\u064a\u0644 \u062d\u062c\u0645 \u0627\u0644\u0644\u062d\u0627\u0645 \u0644\u0644\u0645\u0643\u0648\u0646\u0627\u062a \u0627\u0644\u0623\u0643\u0628\u0631 \u062d\u062c\u0645\u064b\u0627. \u0642\u062f \u064a\u0643\u0648\u0646 \u0627\u0644\u0627\u0633\u062a\u0646\u0633\u0644 \u0627\u0644\u0645\u062a\u062f\u0631\u062c \u062d\u0644\u0627\u064b \u0623\u0641\u0636\u0644.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1772590197975\"><strong class=\"schema-faq-question\">\u0633: \u0645\u0627 \u0647\u064a \u0646\u0633\u0628\u0629 \u0627\u0644\u0645\u0633\u0627\u062d\u0629 \u0627\u0644\u0645\u0642\u0628\u0648\u0644\u0629 \u0644\u0640 BGA 0.4 \u0645\u0645\u061f<\/strong> <p class=\"schema-faq-answer\">A: Typically \u2265 0.66. Lower values significantly increase incomplete paste release risk.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1772590215356\"><strong class=\"schema-faq-question\">\u0633: \u0647\u0644 \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u0642\u0644\u0644 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0627\u0633\u062a\u0646\u0633\u0644 \u0645\u0646 \u0627\u0644\u0641\u0631\u0627\u063a\u0627\u062a\u061f<\/strong> <p class=\"schema-faq-answer\">\u062c: \u0646\u0639\u0645. \u064a\u0633\u0627\u0639\u062f \u062a\u0635\u0645\u064a\u0645 \u0641\u062a\u062d\u0629 \u0632\u062c\u0627\u062c \u0627\u0644\u0646\u0627\u0641\u0630\u0629 \u0639\u0644\u0649 \u062a\u0642\u0644\u064a\u0644 \u0627\u0644\u0641\u0631\u0627\u063a\u0627\u062a \u0641\u064a \u0627\u0644\u0648\u0633\u0627\u062f\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u064a\u0629.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1772590232283\"><strong class=\"schema-faq-question\">\u0633: \u0647\u0644 \u064a\u062c\u0628 \u0623\u0646 \u062a\u062a\u0637\u0627\u0628\u0642 \u0627\u0644\u0641\u062a\u062d\u0629 \u062f\u0627\u0626\u0645\u064b\u0627 \u0645\u0639 \u062d\u062c\u0645 \u0627\u0644\u0648\u0633\u0627\u062f\u0629\u061f<\/strong> <p class=\"schema-faq-answer\">\u062c: \u0644\u0627. \u063a\u0627\u0644\u0628\u064b\u0627 \u0645\u0627 \u064a\u062a\u0645 \u062a\u0642\u0644\u064a\u0644 \u0627\u0644\u0641\u062a\u062d\u0629 \u0639\u0646 \u0642\u0635\u062f \u0644\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u062d\u062c\u0645 \u0627\u0644\u0644\u062d\u0627\u0645 \u0648\u0645\u0646\u0639 \u0627\u0644\u062a\u0648\u0635\u064a\u0644.<\/p> <\/div> <\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>\u0627\u0644\u062e\u0627\u062a\u0645\u0629<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u064a\u062d\u062f\u062f \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0642\u0627\u0644\u0628 \u0628\u0634\u0643\u0644 \u0645\u0628\u0627\u0634\u0631 \u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u062d\u062c\u0645 \u0627\u0644\u0644\u062d\u0627\u0645 \u0648\u0627\u062a\u0633\u0627\u0642 \u0627\u0644\u0637\u0628\u0627\u0639\u0629.<\/p>\n\n\n\n<p>\u0627\u0644\u062a\u062d\u0633\u064a\u0646:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0627\u0644\u0633\u064f\u0645\u0643<\/li>\n\n\n\n<li>\u0647\u0646\u062f\u0633\u0629 \u0627\u0644\u0641\u062a\u062d\u0629<\/li>\n\n\n\n<li>\u0646\u0633\u0628\u0629 \u0627\u0644\u0645\u0633\u0627\u062d\u0629<\/li>\n\n\n\n<li>\u0637\u0644\u0627\u0621 \u0627\u0644\u0633\u0637\u062d<\/li>\n<\/ul>\n\n\n\n<p>\u0623\u0645\u0631 \u0628\u0627\u0644\u063a \u0627\u0644\u0623\u0647\u0645\u064a\u0629 \u0644\u062a\u062d\u0642\u064a\u0642 \u0639\u0627\u0626\u062f SMT \u0645\u0633\u062a\u0642\u0631.<\/p>\n\n\n\n<p>\u062c\u0648\u062f\u0629 \u0627\u0644\u0637\u0628\u0627\u0639\u0629 \u0647\u064a \u0623\u0633\u0627\u0633 \u0645\u0648\u062b\u0648\u0642\u064a\u0629 \u0627\u0644\u062a\u062c\u0645\u064a\u0639.<\/p>\n\n\n\n<p>In high-density electronics, stencil design is not a mechanical accessory\u2014it is a process control tool.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u064a\u0628\u062d\u062b \u0647\u0630\u0627 \u0627\u0644\u0645\u0644\u062e\u0635 \u062a\u0623\u062b\u064a\u0631 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0642\u0648\u0627\u0644\u0628 \u0639\u0644\u0649 \u0625\u0646\u062a\u0627\u062c\u064a\u0629 SMT\u060c \u0645\u0639 \u0627\u0644\u062a\u0631\u0643\u064a\u0632 \u0639\u0644\u0649 \u0627\u0644\u0633\u0645\u0627\u0643\u0629 \u0648\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0641\u062a\u062d\u0629 \u0648\u0646\u0633\u0628\u0629 \u0627\u0644\u0645\u0633\u0627\u062d\u0629 \u0645\u0646 \u0623\u062c\u0644 \u0646\u0642\u0644 \u0645\u0639\u062c\u0648\u0646 \u0627\u0644\u0644\u062d\u0627\u0645 \u0628\u0634\u0643\u0644 \u0645\u062b\u0627\u0644\u064a. \u0643\u0645\u0627 \u064a\u0646\u0627\u0642\u0634 \u0627\u0644\u0642\u0648\u0627\u0644\u0628 \u0627\u0644\u0645\u062a\u062f\u0631\u062c\u0629 \u0644\u0644\u0648\u062d\u0627\u062a \u063a\u064a\u0631 \u0627\u0644\u0645\u062a\u062c\u0627\u0646\u0633\u0629. \u064a\u0642\u062f\u0645 \u0647\u0630\u0627 \u0627\u0644\u062f\u0644\u064a\u0644 \u0627\u0644\u0647\u0646\u062f\u0633\u064a \u0627\u0633\u062a\u0631\u0627\u062a\u064a\u062c\u064a\u0627\u062a \u0639\u0645\u0644\u064a\u0629 \u0644\u062a\u0642\u0644\u064a\u0644 \u0639\u064a\u0648\u0628 \u0627\u0644\u0644\u062d\u0627\u0645 \u0627\u0644\u0634\u0627\u0626\u0639\u0629 \u0645\u062b\u0644 \u0627\u0644\u062a\u0648\u0635\u064a\u0644\u0627\u062a \u063a\u064a\u0631 \u0627\u0644\u0635\u062d\u064a\u062d\u0629 \u0648\u0639\u062f\u0645 \u0643\u0641\u0627\u064a\u0629 \u0627\u0644\u0644\u062d\u0627\u0645\u060c \u0645\u0645\u0627 \u064a\u0624\u062f\u064a \u0641\u064a \u0627\u0644\u0646\u0647\u0627\u064a\u0629 \u0625\u0644\u0649 \u062a\u062d\u0633\u064a\u0646 \u0645\u0648\u062b\u0648\u0642\u064a\u0629 \u0627\u0644\u062a\u062c\u0645\u064a\u0639 \u0648\u0643\u0641\u0627\u0621\u0629 \u0627\u0644\u0639\u0645\u0644\u064a\u0629.<\/p>","protected":false},"author":2,"featured_media":8372,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[212],"class_list":["post-8369","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-smt-yield"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Stencil Design Optimization for SMT Yield: Aperture Design, Area Ratio &amp; Defect Control<\/title>\n<meta name=\"description\" content=\"Learn how stencil thickness, aperture design, area ratio, and step stencils impact SMT yield. 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Being too thin may reduce solder volume for larger components. A step stencil may be a better solution.","inLanguage":"ar"},"inLanguage":"ar"},{"@type":"Question","@id":"https:\/\/topfastpcba.com\/stencil-design-optimization-smt-yield\/#faq-question-1772590197975","position":3,"url":"https:\/\/topfastpcba.com\/stencil-design-optimization-smt-yield\/#faq-question-1772590197975","name":"Q: What area ratio is acceptable for a 0.4 mm BGA?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Typically \u2265 0.66. Lower values significantly increase incomplete paste release risk.","inLanguage":"ar"},"inLanguage":"ar"},{"@type":"Question","@id":"https:\/\/topfastpcba.com\/stencil-design-optimization-smt-yield\/#faq-question-1772590215356","position":4,"url":"https:\/\/topfastpcba.com\/stencil-design-optimization-smt-yield\/#faq-question-1772590215356","name":"Q: Can stencil design reduce voiding?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Yes. Window-pane aperture design helps reduce voiding in thermal pads.","inLanguage":"ar"},"inLanguage":"ar"},{"@type":"Question","@id":"https:\/\/topfastpcba.com\/stencil-design-optimization-smt-yield\/#faq-question-1772590232283","position":5,"url":"https:\/\/topfastpcba.com\/stencil-design-optimization-smt-yield\/#faq-question-1772590232283","name":"Q: Should aperture always match pad size?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: No. Aperture is often intentionally reduced to control solder volume and prevent bridging.","inLanguage":"ar"},"inLanguage":"ar"}]}},"_links":{"self":[{"href":"https:\/\/topfastpcba.com\/ar\/wp-json\/wp\/v2\/posts\/8369","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/topfastpcba.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/topfastpcba.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/topfastpcba.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/topfastpcba.com\/ar\/wp-json\/wp\/v2\/comments?post=8369"}],"version-history":[{"count":1,"href":"https:\/\/topfastpcba.com\/ar\/wp-json\/wp\/v2\/posts\/8369\/revisions"}],"predecessor-version":[{"id":8373,"href":"https:\/\/topfastpcba.com\/ar\/wp-json\/wp\/v2\/posts\/8369\/revisions\/8373"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/topfastpcba.com\/ar\/wp-json\/wp\/v2\/media\/8372"}],"wp:attachment":[{"href":"https:\/\/topfastpcba.com\/ar\/wp-json\/wp\/v2\/media?parent=8369"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/topfastpcba.com\/ar\/wp-json\/wp\/v2\/categories?post=8369"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/topfastpcba.com\/ar\/wp-json\/wp\/v2\/tags?post=8369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}