{"id":3532,"date":"2025-07-04T11:21:09","date_gmt":"2025-07-04T03:21:09","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=3532"},"modified":"2025-07-04T11:23:28","modified_gmt":"2025-07-04T03:23:28","slug":"how-to-determine-if-a-pcb-is-soldered-correctly","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/fi\/blog\/how-to-determine-if-a-pcb-is-soldered-correctly\/","title":{"rendered":"Miten m\u00e4\u00e4ritet\u00e4\u00e4n, onko piirilevy juotettu oikein?"},"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\">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\/how-to-determine-if-a-pcb-is-soldered-correctly\/#Why_is_PCB_Soldering_Quality_So_Important\" >Miksi PCB-juottamisen laatu on niin t\u00e4rke\u00e4\u00e4?<\/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\/how-to-determine-if-a-pcb-is-soldered-correctly\/#7_Professional_PCB_Soldering_Inspection_Methods\" >7 Professional PCB-juottamisen tarkastusmenetelm\u00e4t<\/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:\/\/www.topfastpcb.com\/fi\/blog\/how-to-determine-if-a-pcb-is-soldered-correctly\/#1_Visual_Inspection_ManualAOI\" >1. Silm\u00e4m\u00e4\u00e4r\u00e4inen tarkastus (manuaalinen\/AOI)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/how-to-determine-if-a-pcb-is-soldered-correctly\/#2_X-Ray_Inspection_Detecting_Hidden_Defects\" >2.R\u00f6ntgentarkastus (piilossa olevien vikojen havaitseminen)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/how-to-determine-if-a-pcb-is-soldered-correctly\/#3_Flying_Probe_Testing_Electrical_Performance_Verification\" >3.Lent\u00e4v\u00e4n koettimen testaus (s\u00e4hk\u00f6isen suorituskyvyn todentaminen)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/how-to-determine-if-a-pcb-is-soldered-correctly\/#4_In-Circuit_Testing_ICT_Comprehensive_Circuit_Verification\" >4.Piirin sis\u00e4inen testaus (ICT) (kattava piirin verifiointi).<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/how-to-determine-if-a-pcb-is-soldered-correctly\/#5_Functional_Testing_FCT\" >5.Toiminnallinen testaus (FCT)<\/a><\/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\/fi\/blog\/how-to-determine-if-a-pcb-is-soldered-correctly\/#6_Thermal_Imaging_Inspection_Identifying_Overheated_Solder_Joints\" >6.L\u00e4mp\u00f6kuvatarkastus (ylikuumentuneiden juotosliitosten tunnistaminen)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/how-to-determine-if-a-pcb-is-soldered-correctly\/#7_Environmental_Stress_Testing_Reliability_Verification\" >7.Ymp\u00e4rist\u00f6n rasitustestaus (luotettavuuden todentaminen)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/how-to-determine-if-a-pcb-is-soldered-correctly\/#Common_Soldering_Defects_and_Solutions\" >Yleiset juotosvirheet ja ratkaisut<\/a><\/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\/fi\/blog\/how-to-determine-if-a-pcb-is-soldered-correctly\/#How_to_Choose_Inspection_Methods\" >Miten valita tarkastusmenetelm\u00e4t?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/how-to-determine-if-a-pcb-is-soldered-correctly\/#Related_reading\" >Aiheeseen liittyv\u00e4 lukeminen<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_is_PCB_Soldering_Quality_So_Important\"><\/span>Miksi PCB-juottamisen laatu on niin t\u00e4rke\u00e4\u00e4?<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Elektroniikan valmistuksessa PCB-juottamisen laatu m\u00e4\u00e4ritt\u00e4\u00e4 suoraan piirilevyjen suorituskyvyn ja tuotteen k\u00e4ytt\u00f6i\u00e4n. Pieni kylm\u00e4 juotosliitos tai oikosulku voi aiheuttaa koko laitteen vikaantumisen. Miten voimme siis varmistaa, ett\u00e4 piirilevyjen juottaminen tehd\u00e4\u00e4n oikein?<\/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-soldering-4.jpg\" alt=\"PCB-juottaminen\" class=\"wp-image-3533\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-soldering-4.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-soldering-4-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-soldering-4-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7_Professional_PCB_Soldering_Inspection_Methods\"><\/span>7 Professional PCB-juottamisen tarkastusmenetelm\u00e4t<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Visual_Inspection_ManualAOI\"><\/span>1.Silm\u00e4m\u00e4\u00e4r\u00e4inen tarkastus (manuaalinen\/<a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-aoi-automated-optical-inspection\/\">AOI<\/a>)<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Sovellettava skenaario<\/strong>: Nopea seulonta ilmeisten juotosvirheiden varalta<\/p><ul class=\"wp-block-list\"><li><strong>Manuaalinen tarkastus<\/strong>Tarkista, ett\u00e4 juotosliitokset ovat sileit\u00e4, py\u00f6ristettyj\u00e4 ja ett\u00e4 niiss\u00e4 ei ole kylmi\u00e4 juotosliitoksia, halkeamia tai juotosiltoja.<\/li>\n\n<li><strong>AOI (automaattinen optinen tarkastus)<\/strong>Vertaa juotosliitoksia standardikuviin huipputarkkojen kameroiden avulla ja tunnistaa koon, muodon tai v\u00e4rin poikkeavuudet. Ihanteellinen er\u00e4tarkastukseen.<\/li><\/ul><blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>AOI-menetelm\u00e4ll\u00e4 voidaan havaita yli 80 % pintavirheist\u00e4, mutta sill\u00e4 ei voida tunnistaa BGA-komponenttien kaltaisia piilossa olevia juotosliitoksia.<\/p><\/blockquote><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_X-Ray_Inspection_Detecting_Hidden_Defects\"><\/span>2.R\u00f6ntgentarkastus (piilossa olevien vikojen havaitseminen)<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Sovellettava skenaario<\/strong>: BGA, QFN ja muut piilojuotosliitokset<\/p><ul class=\"wp-block-list\"><li>K\u00e4ytt\u00e4\u00e4 r\u00f6ntgens\u00e4teily\u00e4 sis\u00e4isten juotosliitosten rakenteiden tutkimiseen ja havaitsee tyhj\u00e4t tilat, kylm\u00e4t juotosliitokset tai pallon virheasennon.<\/li>\n\n<li>Soveltuu erityisesti suuritiheyksisille piirilevyille ja mikrokomponenttien juottamisen laadunarviointiin.<\/li><\/ul><p>Jos tarvitset korkean tarkkuuden PCB-juottamisen tarkastuspalveluja, <a href=\"https:\/\/www.topfastpcb.com\/fi\/\">TopFast PCB<\/a> tarjoaa ammattimaista r\u00f6ntgentarkastusta, jolla varmistetaan, ett\u00e4 piirilevyiss\u00e4 ei ole vikoja.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Flying_Probe_Testing_Electrical_Performance_Verification\"><\/span>3.Lent\u00e4v\u00e4n koettimen testaus (s\u00e4hk\u00f6isen suorituskyvyn todentaminen)<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Sovellettava skenaario<\/strong>: Pienten erien tai prototyyppien testaus<\/p><ul class=\"wp-block-list\"><li>K\u00e4ytt\u00e4\u00e4 liikkuvia antureita juotosliitoksen resistanssin mittaamiseen - kylm\u00e4t juotosliitokset aiheuttavat ep\u00e4normaalin korkean resistanssin.<\/li>\n\n<li>Mukautettuja kiinnikkeit\u00e4 ei tarvita; joustava ja tehokas, mutta hitaampi.<\/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-soldering-6.jpg\" alt=\"\" class=\"wp-image-3536\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-soldering-6.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-soldering-6-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-soldering-6-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_In-Circuit_Testing_ICT_Comprehensive_Circuit_Verification\"><\/span>4. <a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/\">Piirin sis\u00e4inen testaus<\/a> (ICT) (kattava piirin todentaminen)<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Sovellettava skenaario<\/strong>: Massatuotanto<\/p><ul class=\"wp-block-list\"><li>K\u00e4ytt\u00e4\u00e4 testilaitteita kaikkien komponenttien liitett\u00e4vyyden ja toimivuuden tarkistamiseen.<\/li>\n\n<li>Paikallistaa nopeasti oikosulut, avautumiset tai komponenttien arvopoikkeamat.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Functional_Testing_FCT\"><\/span>5.Toiminnallinen testaus (FCT)<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Sovellettava skenaario<\/strong>: Tuotteen lopullinen hyv\u00e4ksyminen<\/p><ul class=\"wp-block-list\"><li>Simuloi todellisia k\u00e4ytt\u00f6olosuhteita PCB:n yleisen suorituskyvyn validoimiseksi.<\/li>\n\n<li>Varmistaa, ett\u00e4 juotosvirheet eiv\u00e4t vaikuta varsinaiseen toiminnallisuuteen.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_Thermal_Imaging_Inspection_Identifying_Overheated_Solder_Joints\"><\/span>6.L\u00e4mp\u00f6kuvatarkastus (ylikuumentuneiden juotosliitosten tunnistaminen)<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Sovellettava skenaario<\/strong>: Suuritehoiset piirilevyt<\/p><ul class=\"wp-block-list\"><li>K\u00e4ytt\u00e4\u00e4 infrapunakameroita paikallisen ylikuumenemisen havaitsemiseen, mik\u00e4 osoittaa kylmi\u00e4 juotosliitoksia tai huonoa kosketusta.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7_Environmental_Stress_Testing_Reliability_Verification\"><\/span>7.Ymp\u00e4rist\u00f6n rasitustestaus (luotettavuuden todentaminen)<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Sovellettava skenaario<\/strong>: Korkeatasoiset tuotteet (esim. sotilas- ja autoelektroniikka).<\/p><ul class=\"wp-block-list\"><li>Sis\u00e4lt\u00e4\u00e4 muun muassa l\u00e4mp\u00f6tilan vaihtelun ja t\u00e4rin\u00e4n testauksen, jolla varmistetaan juotosliitoksen luotettavuus \u00e4\u00e4rimm\u00e4isiss\u00e4 olosuhteissa.<\/li><\/ul><p><a href=\"https:\/\/www.topfastpcb.com\/fi\/\">TopFast PCB<\/a> tarjoaa kokonaisvaltaisia laadunvalvontapalveluja suunnittelusta tuotantoon ja auttaa tuotteitasi l\u00e4p\u00e4isem\u00e4\u00e4n tiukat ymp\u00e4rist\u00f6testit.<\/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-soldering-5.jpg\" alt=\"PCB-juottaminen\" class=\"wp-image-3534\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-soldering-5.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-soldering-5-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-soldering-5-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Soldering_Defects_and_Solutions\"><\/span>Yleiset juotosvirheet ja ratkaisut<span class=\"ez-toc-section-end\"><\/span><\/h2><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Vian tyyppi<\/strong><\/th><th><strong>Oireet<\/strong><\/th><th><strong>Ratkaisu<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Kylm\u00e4 juotosliitos<\/td><td>Tyls\u00e4, l\u00f6ys\u00e4 juotosliitos<\/td><td>Juotetaan uudelleen asianmukaista l\u00e4mp\u00f6tilaa ja aikaa s\u00e4\u00e4st\u00e4en<\/td><\/tr><tr><td>Juotossilta<\/td><td>Oikosulku vierekk\u00e4isten liitosten v\u00e4lill\u00e4<\/td><td>Poista ylim\u00e4\u00e4r\u00e4inen juote juotteenpoistopunoksella.<\/td><\/tr><tr><td>Tyynyn nosto<\/td><td>Kuparifolio irtoaa alustasta.<\/td><td>Vaihda tyyny tai korjaa j\u00e4lki<\/td><\/tr><tr><td>Voiding<\/td><td>Sis\u00e4iset kuplat juotosliitoksessa<\/td><td>Optimoi reflow-juottol\u00e4mp\u00f6tilaprofiili<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Choose_Inspection_Methods\"><\/span>Miten valita tarkastusmenetelm\u00e4t?<span class=\"ez-toc-section-end\"><\/span><\/h2><p><strong>Pienten erien tuotanto<\/strong>: Lent\u00e4v\u00e4n anturin testaus + toiminnallinen testaus<br><strong>Massatuotanto<\/strong>AOI + ICT + r\u00f6ntgenn\u00e4ytteenotto<br><strong>Korkean luotettavuuden vaatimukset<\/strong>T\u00e4ysprosessitarkastus (AOI + r\u00f6ntgen + ymp\u00e4rist\u00f6testaukset).<\/p><p>PCB-juottamisen laatu on elektronisten tuotteiden elinehto.Yhdist\u00e4m\u00e4ll\u00e4 useita tarkastusmenetelmi\u00e4 voit valvoa kattavasti juotosvirheit\u00e4 ja varmistaa piirilevyjen korkean luotettavuuden. Jos etsit ammattimaista piirilevyjen valmistusta ja tarkastuspalveluja, ota yhteytt\u00e4 osoitteeseen <a href=\"https:\/\/www.topfastpcb.com\/fi\/about\/\">TopFast<\/a> PCB-tiimi, ja me tarjoamme sinulle yhden luukun ratkaisun!<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Related_reading\"><\/span>Aiheeseen liittyv\u00e4 lukeminen<span class=\"ez-toc-section-end\"><\/span><\/h2><p><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/welding-flaw-detection\/\">PCB-hitsausvirheiden havaitseminen<br><\/a><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/solder-paste-inspection\/\">Juotospastan tarkastus<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>PCB-juottamisen laatu vaikuttaa suoraan elektronisten tuotteiden suorituskykyyn ja luotettavuuteen. Ammattimaiset testausmenetelm\u00e4t (kuten AOI, r\u00f6ntgen, lent\u00e4v\u00e4 koetin jne.) auttavat sinua tunnistamaan juotosongelmat tarkasti ja tarjoamaan ratkaisuja korkealaatuisen piirilevytuotannon varmistamiseksi.<\/p>","protected":false},"author":1,"featured_media":3535,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[109],"tags":[315],"class_list":["post-3532","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq","tag-pcb-soldering"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to determine if a PCB is soldered correctly? - Topfastpcb<\/title>\n<meta name=\"description\" content=\"Want to know how to determine if PCB soldering is correct? 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