{"id":15989,"date":"2017-08-12T15:39:00","date_gmt":"2017-08-12T07:39:00","guid":{"rendered":"http:\/\/www.seeedstudio.com\/blog\/?p=15989"},"modified":"2018-01-31T21:16:29","modified_gmt":"2018-01-31T13:16:29","slug":"appendix-pcb","status":"publish","type":"post","link":"https:\/\/www.seeedstudio.com\/blog\/2017\/08\/12\/appendix-pcb\/","title":{"rendered":"Appendix – PCB DFM 14"},"content":{"rendered":"

Extracted from the Seeed Fusion Design for Manufacture (DFM) publication, this tid-bit of information is often missed when describing electronic devices. Are my boards double sided or single sided? Is it through-hole or surface mounted? Can you have through hole and surface mount components on the same board? This entry clears up any misunderstanding.<\/p>\n

14.1 PCBA<\/a> Constructions<\/h2>\n

Single Sided (SMT) Mounting<\/h4>\n

\"SingleSurface mounted components only on one side of the boards, or component side. Since there are no through hole components, these boards don’t need drill holes and the copper pads and solder mask are only needed on one side. The latter point is the same with single sided through hole (TH) boards, except the pads are needed on the opposite side of the board, also referred to as the solder side.<\/p>\n

Single Sided Mixed (SMT and THT) Mounting<\/h4>\n

\"Single
\nBoth through hole and surface mount component bodies on the component side. Although, called single sided, the PCB board itself needs to be double sided since the through-hole pads need to be on the solder side, the opposite side to the component bodies.<\/p>\n

Double Sided (SMT) Mounting<\/h4>\n

\"Double<\/p>\n

Simple and compact, double sided SMT boards utilise both sides to make the most of the available area and enable strict form factors to be met. No plated drill holes needed here.<\/p>\n

Wave-Soldered Double Sided Mixed (SMT and THT) Mounting<\/h4>\n

\"Wave-Soldered<\/p>\n

THT and SMT on both sides. This construction is similar to single sided mixed mounting except the spaces between the long component leads on the solder side are also utilized to maximise SMT real estate. For mass production, wave soldering is required to solder both SMD and THT components.<\/p>\n

Hopefully, that was useful and helped clear up a few misconceptions. But there is much more where this came from, check out the chapters below for more valuable PCB design tips and guidelines.<\/p>\n

More Chapters:<\/strong>
\n1.\u00a0Brief Introduction<\/a>
\n2.\u00a0Seeed Fusion PCB Specification<\/a>
\n3.\u00a0Panelization and Bridge Design<\/a>
\n4.\u00a0Component Layout Considerations<\/a>
\n5.\u00a0PCB Hole design<\/a>
\n6.\u00a0Solder Mask Design<\/a>
\n7.\u00a0Copper Trace Design<\/a>
\n8.\u00a0Silkscreen Design<\/a>
\n9.\u00a0PCB Lamination Structure<\/a>
\n10.\u00a0PCB Dimensions Specification<\/a>
\n11.\u00a0Fiducial Mark Design<\/a>
\n12.\u00a0Surface Treatment<\/a>
\n13.\u00a0Files for Manufacture Requirements<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Extracted from the Seeed Fusion Design for Manufacture (DFM) publication, this tid-bit of information is<\/p>\n","protected":false},"author":40,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"iawp_total_views":0,"footnotes":""},"categories":[1],"tags":[4,648,361,839],"class_list":["post-15989","post","type-post","status-publish","format-standard","hentry","category-news","tag-pcb","tag-pcb-dfm","tag-pcba","tag-smt-vs-through-hole-technology"],"yoast_head":"\nAppendix - PCB DFM 14 - Latest News from Seeed Studio<\/title>\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.seeedstudio.com\/blog\/2017\/08\/12\/appendix-pcb\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Appendix - PCB DFM 14 - Latest News from Seeed Studio\" \/>\n<meta property=\"og:description\" content=\"Extracted from the Seeed Fusion Design for Manufacture (DFM) publication, this tid-bit of information is\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.seeedstudio.com\/blog\/2017\/08\/12\/appendix-pcb\/\" \/>\n<meta property=\"og:site_name\" content=\"Latest News from Seeed Studio\" \/>\n<meta property=\"article:published_time\" content=\"2017-08-12T07:39:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2018-01-31T13:16:29+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.seeedstudio.com\/wp-content\/uploads\/2017\/07\/Single-Sided-SMT-Mounting.jpg\" \/>\n<meta name=\"author\" content=\"Liyan Gong\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Liyan Gong\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.seeedstudio.com\/blog\/2017\/08\/12\/appendix-pcb\/\",\"url\":\"https:\/\/www.seeedstudio.com\/blog\/2017\/08\/12\/appendix-pcb\/\",\"name\":\"Appendix - PCB DFM 14 - Latest News from Seeed Studio\",\"isPartOf\":{\"@id\":\"https:\/\/www.seeedstudio.com\/blog\/#website\"},\"datePublished\":\"2017-08-12T07:39:00+00:00\",\"dateModified\":\"2018-01-31T13:16:29+00:00\",\"author\":{\"@id\":\"https:\/\/www.seeedstudio.com\/blog\/#\/schema\/person\/acf72c44eac0c1f173006b4f4b086380\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.seeedstudio.com\/blog\/2017\/08\/12\/appendix-pcb\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.seeedstudio.com\/blog\/2017\/08\/12\/appendix-pcb\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.seeedstudio.com\/blog\/2017\/08\/12\/appendix-pcb\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.seeedstudio.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Appendix – PCB DFM 14\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.seeedstudio.com\/blog\/#website\",\"url\":\"https:\/\/www.seeedstudio.com\/blog\/\",\"name\":\"Latest News from Seeed Studio\",\"description\":\"Emerging IoT, AI and Autonomous Applications on the Edge\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.seeedstudio.com\/blog\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.seeedstudio.com\/blog\/#\/schema\/person\/acf72c44eac0c1f173006b4f4b086380\",\"name\":\"Liyan Gong\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.seeedstudio.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/86714654264b3fc714cf1bf558735809?s=96&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/86714654264b3fc714cf1bf558735809?s=96&r=g\",\"caption\":\"Liyan Gong\"},\"description\":\"10 years in the IoT hardware industry. 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