{"id":3689,"date":"2025-07-26T08:19:00","date_gmt":"2025-07-26T00:19:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=3689"},"modified":"2025-07-25T11:20:00","modified_gmt":"2025-07-25T03:20:00","slug":"what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/","title":{"rendered":"Mik\u00e4 on piirilevyn t\u00e4ytt\u00e4m\u00e4tt\u00f6mien juotospintojen tarkoitus?"},"content":{"rendered":"<p>Kun valmistus <a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/printed-circuit-board-pcb\/\">PCB<\/a> piirilevyjen s\u00e4hk\u00f6iset liit\u00e4nn\u00e4t elektronisten komponenttien ja piirilevyn v\u00e4lill\u00e4 toteutetaan asettamalla johdotukset piirilevyn pinnalle, asentamalla elektroniset komponentit ja juottamalla ne sitten paikoilleen. Hyv\u00e4t liitokset ja juotosliitosten lujuus ovat ratkaisevia piirilevyjen normaalin toiminnan kannalta.<\/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\/07\/PCB-solder-joint-1.jpg\" alt=\"PCB juotosliitos\" class=\"wp-image-3690\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><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\">Sis\u00e4llysluettelo<\/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\/fi\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#1_Design_Purposes_of_Unfilled_Solder_Joints\" >1. T\u00e4ytt\u00e4m\u00e4tt\u00f6mien juotosliitosten suunnittelutarkoitukset<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#2_Electrical_Performance_Impact_Mechanisms\" >2. S\u00e4hk\u00f6isen suorituskyvyn vaikutusmekanismit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#3_Solder_Joint_Quality_Inspection_Techniques\" >3. Juotosliitosten laadun tarkastustekniikat<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#4_Key_Process_Control_Parameters\" >4. Keskeiset prosessinvalvontaparametrit<\/a><\/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\/fi\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#Common_Issues_Solutions\" >Yleiset ongelmat ja ratkaisut<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Design_Purposes_of_Unfilled_Solder_Joints\"><\/span>1. T\u00e4ytt\u00e4m\u00e4tt\u00f6mien juotosliitosten suunnittelutarkoitukset<span class=\"ez-toc-section-end\"><\/span><\/h2><ul class=\"wp-block-list\"><li><strong>Testipisteen toiminnallisuus<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>S\u00e4hk\u00f6testaus: Paljastetut kuparialueet toimivat testipistein\u00e4 oskilloskoopeille, lent\u00e4ville koettimille ja muille vastaaville laitteille.<\/li>\n\n<li>Prosessin todentaminen: Testipisteet validoivat prosessiparametrit.<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Erityiset suunnitteluvaatimukset<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>L\u00e4mm\u00f6npoisto: (vaatii virransiirtokapasiteettilaskelmia).<\/li>\n\n<li>RF-vianm\u00e4\u00e4ritys: Peitt\u00e4m\u00e4tt\u00f6m\u00e4t impedanssitestipisteet korkeataajuuspiirej\u00e4 varten (kultausta suositellaan).<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Electrical_Performance_Impact_Mechanisms\"><\/span>2. S\u00e4hk\u00f6isen suorituskyvyn vaikutusmekanismit<span class=\"ez-toc-section-end\"><\/span><\/h2><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Vaikutusulottuvuus<\/th><th>Mekanismi<\/th><th>Tyypillinen skenaario<\/th><\/tr><\/thead><tbody><tr><td>Kosketusvastus<\/td><td>Oksidikerrokset lis\u00e4\u00e4v\u00e4t impedanssia 3-5x<\/td><td>Liiallinen j\u00e4nniteh\u00e4vi\u00f6 virtapiireiss\u00e4<\/td><\/tr><tr><td>Korkean taajuuden signaalih\u00e4vi\u00f6<\/td><td>Impedanssierot aiheuttavat paluuh\u00e4vi\u00f6t\u00e4 (&gt;3dB).<\/td><td>5G-moduulien lis\u00e4\u00e4ntyneet bittivirheprosentit<\/td><\/tr><tr><td>Terminen luotettavuus<\/td><td>Suurempi l\u00e4mp\u00f6resistanssi nostaa liitosl\u00e4mp\u00f6tiloja 10-15 \u00b0C:lla.<\/td><td>Teho-MOSFETien ennenaikainen vikaantuminen<\/td><\/tr><\/tbody><\/table><\/figure><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-solder-joint-3.jpg\" alt=\"PCB juotosliitos\" class=\"wp-image-3691\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-3.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-3-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-3-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Solder_Joint_Quality_Inspection_Techniques\"><\/span>3. Juotosliitosten laadun tarkastustekniikat<span class=\"ez-toc-section-end\"><\/span><\/h2><ul class=\"wp-block-list\"><li><strong>Teollisuusluokan ratkaisut<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>3D SPI: Juotospastan paksuuden mittaus (\u00b15\u03bcm tarkkuus): Juotospastan paksuuden mittaus (\u00b15\u03bcm tarkkuus).<\/li>\n\n<li>Mikrofocus-r\u00f6ntgenkuvaus: Havaitsee 0,2\u03bcm:n tasoiset BGA-ontelot (99,7% havaitsemisaste).<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Kustannustehokkaat ratkaisut<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>Punaisen v\u00e4riaineen tunkeutuminen: (80%-s\u00e4\u00e4st\u00f6t).<\/li>\n\n<li>L\u00e4mp\u00f6kuvaus: Tunnistaa kylm\u00e4t liitokset l\u00e4mp\u00f6tilapoikkeamien avulla.<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Key_Process_Control_Parameters\"><\/span>4. Keskeiset prosessinvalvontaparametrit<span class=\"ez-toc-section-end\"><\/span><\/h2><p><strong>Reflow-juotosprofiili (lyijyt\u00f6n prosessi esimerkki)<\/strong><\/p><ul class=\"wp-block-list\"><li>Esil\u00e4mmitys: 150 \u00b0C (1-2 \u00b0C\/s ramppinopeus).<\/li>\n\n<li>Liotusaika: 90 sekuntia (\u00b15 \u00b0C:n vakautus).<\/li>\n\n<li>Huippul\u00e4mp\u00f6tila: 245 \u00b0C (30-45 sekunnin kesto)<\/li>\n\n<li>J\u00e4\u00e4hdytysnopeus: (est\u00e4\u00e4 l\u00e4mp\u00f6shokin)<\/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-solder-joint-2.jpg\" alt=\"PCB juotosliitos\" class=\"wp-image-3692\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Issues_Solutions\"><\/span>Yleiset ongelmat ja ratkaisut<span class=\"ez-toc-section-end\"><\/span><\/h2><p><strong>Q1: Signaalin eheysongelmat suurtaajuuspiireiss\u00e4 - ep\u00e4illyt t\u00e4ytt\u00e4m\u00e4tt\u00f6m\u00e4t juotosliitokset?<\/strong><br>A1: Paikanna impedanssin ep\u00e4jatkuvuuskohtien paikantaminen TDR-mittauksella (Time-Domain Reflectometry) ja tarkista se sitten r\u00f6ntgenkuvauksella. Suositukset:<\/p><ul class=\"wp-block-list\"><li>K\u00e4yt\u00e4 v\u00e4h\u00e4h\u00e4vi\u00f6isi\u00e4 juotosseoksia (esim. SnAgCu).<\/li>\n\n<li>Testipisteiden suunnittelu impedanssin kompensoinnilla<\/li><\/ul><p><strong>Kysymys 2: Miten kylm\u00e4juotosliitokset voidaan k\u00e4sitell\u00e4 nopeasti massatuotannossa?<\/strong><br>A2: Toteutetaan kolmivaiheinen ohjausmenetelm\u00e4:<\/p><ol class=\"wp-block-list\"><li>Stencil-optimointi: 5%:ll\u00e4.<\/li>\n\n<li>Typpi-ilmakeh\u00e4: Pid\u00e4 O\u2082-taso &lt;1000 ppm.<\/li>\n\n<li>Inline AOI: Lis\u00e4\u00e4 sivukuvatarkastus<\/li><\/ol><p><strong>Kysymys 3: Altistunut kupari hapettuu kosteissa ymp\u00e4rist\u00f6iss\u00e4, mik\u00e4 aiheuttaa huonon kosketuksen?<\/strong><br>A3: Kolmiportainen suojausstrategia:<\/p><ul class=\"wp-block-list\"><li>Ensisijainen: S\u00e4hk\u00f6suojaton nikkelikuorrutuskulta (ENIG).<\/li>\n\n<li>Toissijainen: Paikallinen conformal-pinnoite (UV-kovetteinen hartsi).<\/li>\n\n<li>Terti\u00e4\u00e4rinen: IP67-luokiteltu vesitiivis rakenne<\/li><\/ul><p><\/p>","protected":false},"excerpt":{"rendered":"<p>Piirilevyjen t\u00e4ytt\u00e4m\u00e4tt\u00f6mien juotostyynyjen (alttiit kuparialueet) suunnittelutarkoitukset, s\u00e4hk\u00f6iset suorituskykyvaikutukset ja tarkastusmenetelm\u00e4t, jotka kattavat keskeiset tietopisteet, kuten testipisteen toiminnot, signaalin eheyden riskit ja r\u00f6ntgentarkastustekniikka, ovat alan standardien, kuten IPC-610, mukaisia ja tarjoavat apua piirilevysuunnitteluun ja valmistusprosesseihin.<\/p>","protected":false},"author":1,"featured_media":3693,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[109],"tags":[331],"class_list":["post-3689","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq","tag-pcb-solder-joint"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is the purpose of unfilled solder pads on a PCB? - Topfastpcb<\/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.topfastpcb.com\/fi\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/\" \/>\n<meta property=\"og:locale\" content=\"fi_FI\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is the purpose of unfilled solder pads on a PCB? - Topfastpcb\" \/>\n<meta property=\"og:description\" content=\"The design purposes, electrical performance impacts, and inspection methods of unfilled solder pads (exposed copper areas) on PCBs, covering key knowledge points such as test point functions, signal integrity risks, and X-ray inspection technology, comply with industry standards such as IPC-610, and provide assistance for PCB design and manufacturing processes.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/\" \/>\n<meta property=\"og:site_name\" content=\"Topfastpcb\" \/>\n<meta property=\"article:published_time\" content=\"2025-07-26T00:19:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"402\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"\u6258\u666e\u6cd5\u65af\u7279\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Kirjoittanut\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6258\u666e\u6cd5\u65af\u7279\" \/>\n\t<meta name=\"twitter:label2\" content=\"Arvioitu lukuaika\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minuuttia\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/\"},\"author\":{\"name\":\"\u6258\u666e\u6cd5\u65af\u7279\",\"@id\":\"https:\/\/www.topfastpcb.com\/#\/schema\/person\/39870874f1c329f3cd3693593dbdce3a\"},\"headline\":\"What is the purpose of unfilled solder pads on a PCB?\",\"datePublished\":\"2025-07-26T00:19:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/\"},\"wordCount\":369,\"publisher\":{\"@id\":\"https:\/\/www.topfastpcb.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint.jpg\",\"keywords\":[\"PCB solder joint\"],\"articleSection\":[\"FAQ\"],\"inLanguage\":\"fi\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/\",\"url\":\"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/\",\"name\":\"What is the purpose of unfilled solder pads on a PCB? - Topfastpcb\",\"isPartOf\":{\"@id\":\"https:\/\/www.topfastpcb.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint.jpg\",\"datePublished\":\"2025-07-26T00:19:00+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#breadcrumb\"},\"inLanguage\":\"fi\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fi\",\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#primaryimage\",\"url\":\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint.jpg\",\"contentUrl\":\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint.jpg\",\"width\":600,\"height\":402,\"caption\":\"PCB solder joint\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.topfastpcb.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"What is the purpose of unfilled solder pads on a PCB?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.topfastpcb.com\/#website\",\"url\":\"https:\/\/www.topfastpcb.com\/\",\"name\":\"Topfastpcb\",\"description\":\"Topfast Prime Choice for Global Electronics Manufacturing\",\"publisher\":{\"@id\":\"https:\/\/www.topfastpcb.com\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.topfastpcb.com\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fi\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.topfastpcb.com\/#organization\",\"name\":\"Topfastpcb\",\"url\":\"https:\/\/www.topfastpcb.com\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fi\",\"@id\":\"https:\/\/www.topfastpcb.com\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/02\/cropped-topfast-logo.png\",\"contentUrl\":\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/02\/cropped-topfast-logo.png\",\"width\":144,\"height\":56,\"caption\":\"Topfastpcb\"},\"image\":{\"@id\":\"https:\/\/www.topfastpcb.com\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.topfastpcb.com\/#\/schema\/person\/39870874f1c329f3cd3693593dbdce3a\",\"name\":\"\u6258\u666e\u6cd5\u65af\u7279\",\"sameAs\":[\"http:\/\/www.topfastpcb.com\"],\"url\":\"https:\/\/www.topfastpcb.com\/fi\/blog\/author\/admin\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"What is the purpose of unfilled solder pads on a PCB? - Topfastpcb","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/","og_locale":"fi_FI","og_type":"article","og_title":"What is the purpose of unfilled solder pads on a PCB? - Topfastpcb","og_description":"The design purposes, electrical performance impacts, and inspection methods of unfilled solder pads (exposed copper areas) on PCBs, covering key knowledge points such as test point functions, signal integrity risks, and X-ray inspection technology, comply with industry standards such as IPC-610, and provide assistance for PCB design and manufacturing processes.","og_url":"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/","og_site_name":"Topfastpcb","article_published_time":"2025-07-26T00:19:00+00:00","og_image":[{"width":600,"height":402,"url":"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint.jpg","type":"image\/jpeg"}],"author":"\u6258\u666e\u6cd5\u65af\u7279","twitter_card":"summary_large_image","twitter_misc":{"Kirjoittanut":"\u6258\u666e\u6cd5\u65af\u7279","Arvioitu lukuaika":"2 minuuttia"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#article","isPartOf":{"@id":"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/"},"author":{"name":"\u6258\u666e\u6cd5\u65af\u7279","@id":"https:\/\/www.topfastpcb.com\/#\/schema\/person\/39870874f1c329f3cd3693593dbdce3a"},"headline":"What is the purpose of unfilled solder pads on a PCB?","datePublished":"2025-07-26T00:19:00+00:00","mainEntityOfPage":{"@id":"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/"},"wordCount":369,"publisher":{"@id":"https:\/\/www.topfastpcb.com\/#organization"},"image":{"@id":"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#primaryimage"},"thumbnailUrl":"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint.jpg","keywords":["PCB solder joint"],"articleSection":["FAQ"],"inLanguage":"fi"},{"@type":"WebPage","@id":"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/","url":"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/","name":"What is the purpose of unfilled solder pads on a PCB? - Topfastpcb","isPartOf":{"@id":"https:\/\/www.topfastpcb.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#primaryimage"},"image":{"@id":"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#primaryimage"},"thumbnailUrl":"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint.jpg","datePublished":"2025-07-26T00:19:00+00:00","breadcrumb":{"@id":"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#breadcrumb"},"inLanguage":"fi","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/"]}]},{"@type":"ImageObject","inLanguage":"fi","@id":"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#primaryimage","url":"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint.jpg","contentUrl":"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint.jpg","width":600,"height":402,"caption":"PCB solder joint"},{"@type":"BreadcrumbList","@id":"https:\/\/www.topfastpcb.com\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.topfastpcb.com\/"},{"@type":"ListItem","position":2,"name":"What is the purpose of unfilled solder pads on a PCB?"}]},{"@type":"WebSite","@id":"https:\/\/www.topfastpcb.com\/#website","url":"https:\/\/www.topfastpcb.com\/","name":"Topfastpcb","description":"Topfast Prime Choice for Global Electronics Manufacturing","publisher":{"@id":"https:\/\/www.topfastpcb.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.topfastpcb.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fi"},{"@type":"Organization","@id":"https:\/\/www.topfastpcb.com\/#organization","name":"Topfastpcb","url":"https:\/\/www.topfastpcb.com\/","logo":{"@type":"ImageObject","inLanguage":"fi","@id":"https:\/\/www.topfastpcb.com\/#\/schema\/logo\/image\/","url":"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/02\/cropped-topfast-logo.png","contentUrl":"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/02\/cropped-topfast-logo.png","width":144,"height":56,"caption":"Topfastpcb"},"image":{"@id":"https:\/\/www.topfastpcb.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.topfastpcb.com\/#\/schema\/person\/39870874f1c329f3cd3693593dbdce3a","name":"\u6258\u666e\u6cd5\u65af\u7279","sameAs":["http:\/\/www.topfastpcb.com"],"url":"https:\/\/www.topfastpcb.com\/fi\/blog\/author\/admin\/"}]}},"_links":{"self":[{"href":"https:\/\/www.topfastpcb.com\/fi\/wp-json\/wp\/v2\/posts\/3689","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.topfastpcb.com\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.topfastpcb.com\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.topfastpcb.com\/fi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.topfastpcb.com\/fi\/wp-json\/wp\/v2\/comments?post=3689"}],"version-history":[{"count":1,"href":"https:\/\/www.topfastpcb.com\/fi\/wp-json\/wp\/v2\/posts\/3689\/revisions"}],"predecessor-version":[{"id":3694,"href":"https:\/\/www.topfastpcb.com\/fi\/wp-json\/wp\/v2\/posts\/3689\/revisions\/3694"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.topfastpcb.com\/fi\/wp-json\/wp\/v2\/media\/3693"}],"wp:attachment":[{"href":"https:\/\/www.topfastpcb.com\/fi\/wp-json\/wp\/v2\/media?parent=3689"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.topfastpcb.com\/fi\/wp-json\/wp\/v2\/categories?post=3689"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.topfastpcb.com\/fi\/wp-json\/wp\/v2\/tags?post=3689"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}