{"id":3560,"date":"2025-07-09T08:22:00","date_gmt":"2025-07-09T00:22:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=3560"},"modified":"2025-07-08T15:56:17","modified_gmt":"2025-07-08T07:56:17","slug":"how-to-perform-reflow-soldering-on-double-sided-pcb","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/fi\/blog\/how-to-perform-reflow-soldering-on-double-sided-pcb\/","title":{"rendered":"Kuinka suorittaa reflow-juottaminen kaksipuolisella PCB: ll\u00e4?"},"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-perform-reflow-soldering-on-double-sided-pcb\/#Why_is_Double-Sided_PCB_Reflow_Soldering_a_Challenge_in_Electronics_Manufacturing\" >Miksi kaksipuolinen PCB-reflow-juottaminen on haaste elektroniikan valmistuksessa?<\/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-perform-reflow-soldering-on-double-sided-pcb\/#In-Depth_Comparison_of_Two_Main_Soldering_Processes\" >Kahden t\u00e4rkeimm\u00e4n juotosprosessin perusteellinen vertailu<\/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-perform-reflow-soldering-on-double-sided-pcb\/#Option_A_Double-Sided_Solder_Paste_Process_Ideal_for_High-Density_Components\" >Vaihtoehto A: Kaksipuolinen juotospastaprosessi (ihanteellinen korkean tiheyden komponenteille)<\/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-perform-reflow-soldering-on-double-sided-pcb\/#Option_B_Solder_Paste_Red_Glue_Hybrid_Process_Solution_for_Large_Components\" >Vaihtoehto B: Juotospasta + punaliima hybridiprosessi (ratkaisu suurille komponenteille)<\/a><\/li><\/ul><\/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\/how-to-perform-reflow-soldering-on-double-sided-pcb\/#5_Golden_Rules_for_Soldering_Quality_Control\" >5 kultaista s\u00e4\u00e4nt\u00f6\u00e4 juottamisen laadunvalvontaan<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/how-to-perform-reflow-soldering-on-double-sided-pcb\/#Common_Issues_and_Engineering_Solutions\" >Yleiset ongelmat ja tekniset ratkaisut<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/how-to-perform-reflow-soldering-on-double-sided-pcb\/#Future_Process_Trends\" >Tulevaisuuden prosessisuuntaukset<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_is_Double-Sided_PCB_Reflow_Soldering_a_Challenge_in_Electronics_Manufacturing\"><\/span>Miksi kaksipuolinen PCB-reflow-juottaminen on haaste elektroniikan valmistuksessa?<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Suorituskykyisiss\u00e4 elektroniikkatuotteissa, kuten \u00e4lypuhelimissa ja teollisuuden ohjauslaitteissa, <a href=\"https:\/\/www.topfastpcb.com\/fi\/products\/double-sided-flexible-pcb\/\">kaksipuolinen PCB<\/a> malleista on tullut standardi. Kaksipuoliseen juottamiseen liittyy kuitenkin kaksi suurta haastetta:<\/p><ol class=\"wp-block-list\"><li><strong>L\u00e4mm\u00f6nhallinnan monimutkaisuus<\/strong> - Toisen puolen juottamisen aikana ensimm\u00e4inen puoli kuumennetaan uudelleen, mik\u00e4 voi aiheuttaa komponentin irtoamisen tai juotosliitoksen pett\u00e4misen.<\/li>\n\n<li><strong>Prosessin valintadilemma<\/strong> - Sek\u00e4 juotospasta- ett\u00e4 punaliimaprosesseilla on omat hyv\u00e4t ja huonot puolensa, jotka vaativat huolellista harkintaa komponenttien asettelun perusteella.<\/li><\/ol><p><a href=\"https:\/\/www.topfastpcb.com\/fi\/contact\/\" target=\"_blank\" rel=\"noreferrer noopener\">Konsultoi prosessi-insin\u00f6\u00f6rej\u00e4mme<\/a>\u00a0r\u00e4\u00e4t\u00e4l\u00f6ityj\u00e4 ratkaisuja varten<\/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\/double-sided-pcb.jpg\" alt=\"PCB-reflow-juottaminen\" class=\"wp-image-3561\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/double-sided-pcb.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/double-sided-pcb-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/double-sided-pcb-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"In-Depth_Comparison_of_Two_Main_Soldering_Processes\"><\/span>Kahden t\u00e4rkeimm\u00e4n juotosprosessin perusteellinen vertailu<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Option_A_Double-Sided_Solder_Paste_Process_Ideal_for_High-Density_Components\"><\/span>Vaihtoehto A: Kaksipuolinen juotospastaprosessi (ihanteellinen korkean tiheyden komponenteille)<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Paras<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Piirilevyt, joissa on BGA-, QFN- tai muita tarkkuus-IC-piirej\u00e4 molemmilla puolilla.<\/li>\n\n<li>Kevyet komponentit kokonaisuudessaan<\/li><\/ul><p><strong>T\u00e4rkeimm\u00e4t vaiheet<\/strong>:<\/p><ol class=\"wp-block-list\"><li>Puoli A: Tulosta juotospasta \u2192 Aseta komponentit \u2192 Reflow-juote (huippul\u00e4mp\u00f6tila 245 \u00b0C)<\/li>\n\n<li>J\u00e4\u00e4hdyt\u00e4 huoneenl\u00e4mp\u00f6iseksi ja k\u00e4\u00e4nn\u00e4 sitten PCB<\/li>\n\n<li>B-puoli: Tulosta juotospasta \u2192 Aseta komponentit \u2192 K\u00e4yt\u00e4 asteittaista l\u00e4mp\u00f6tilaprofiilia (v\u00e4henn\u00e4 huippul\u00e4mp\u00f6tilaa 5-10 \u00b0C).<\/li><\/ol><p><strong>Edut<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Korkea juotosliitoksen luotettavuus<\/li>\n\n<li>Soveltuu automatisoituun massatuotantoon<\/li><\/ul><p><strong>Riskit<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Suuret komponentit voivat irrota toisen uudelleenjuoksutuksen aikana.<\/li>\n\n<li>Toisen puolen juottaminen edellytt\u00e4\u00e4 tarkkaa l\u00e4mp\u00f6tilan s\u00e4\u00e4t\u00f6\u00e4.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Option_B_Solder_Paste_Red_Glue_Hybrid_Process_Solution_for_Large_Components\"><\/span>Vaihtoehto B: Juotospasta + punaliima hybridiprosessi (ratkaisu suurille komponenteille)<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Paras<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Toisella puolella on suuret liittimet\/elektrolyyttikondensaattorit.<\/li>\n\n<li>Sekalaiset pohjapiirrokset, joissa on merkitt\u00e4vi\u00e4 painoeroja<\/li><\/ul><p><strong>Innovatiivinen prosessi<\/strong>:<\/p><ol class=\"wp-block-list\"><li>Juotospastapuoli (puoli A): Normaali reflow-juottaminen<\/li>\n\n<li>Punainen liimapuoli (puoli B): &#8220;Print-Place-Cure&#8221; kolmivaiheinen menetelm\u00e4:<\/li><\/ol><ul class=\"wp-block-list\"><li>Punaisen liiman tulostustarkkuus: \u00b10.1mm<\/li>\n\n<li>Kovettumisl\u00e4mp\u00f6tila: (paljon alhaisempi kuin juotospastan sulamispiste).<\/li>\n\n<li>Valinnainen aaltojuottaminen parantaa luotettavuutta<\/li><\/ul><p><strong>Tekniset huomautukset<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Punaisen liiman on oltava v\u00e4hint\u00e4\u00e4n 0,3 mm:n p\u00e4\u00e4ss\u00e4 juotospinnoista.<\/li>\n\n<li>Pident\u00e4\u00e4 kovettumisaikaa 30 %:lla heikon tartunnan est\u00e4miseksi.<\/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\/double-sided-pcb-1.jpg\" alt=\"PCB-reflow-juottaminen\" class=\"wp-image-3562\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/double-sided-pcb-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/double-sided-pcb-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/double-sided-pcb-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><p><a href=\"https:\/\/www.topfastpcb.com\/fi\/contact\/\">Hanki ilmaisia asiantuntijoiden k\u00e4sity\u00f6oppaita<\/a><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Golden_Rules_for_Soldering_Quality_Control\"><\/span>5 kultaista s\u00e4\u00e4nt\u00f6\u00e4 juottamisen laadunvalvontaan<span class=\"ez-toc-section-end\"><\/span><\/h2><ul class=\"wp-block-list\"><li><strong>Optimoi l\u00e4mp\u00f6tilaprofiili<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>Ensimm\u00e4inen puoli: RSS-k\u00e4yr\u00e4 (2-3 \u00b0C\/s l\u00e4mmitysnopeus).<\/li>\n\n<li>Toinen puoli:K\u00e4yt\u00e4 RTS-k\u00e4yr\u00e4\u00e4 (pidennetty esil\u00e4mmitysaika).<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Komponenttien asetteluohjeet<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>Aseta raskaat osat samalle puolelle<\/li>\n\n<li>Kaksipuoleisten BGA-piirien porrastaminen l\u00e4mp\u00f6j\u00e4nnityskeskittymien v\u00e4ltt\u00e4miseksi<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Juotospastan valintaperusteet<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>Toinen puoli: Sn42\/Bi58).<\/li>\n\n<li>Punaisen liiman viskositeetti:&gt;50,000 cps<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Kriittiset laiteparametrit<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>Reflow-uunin kuljettimen kallistus: 5-7\u00b0<\/li>\n\n<li>J\u00e4\u00e4hdytysnopeus: 4-6\u00b0C\/s<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Tarkastustekniikan p\u00e4ivitykset<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>K\u00e4yt\u00e4 3D SPI:t\u00e4 juotospastan paksuuden tarkastukseen<\/li>\n\n<li>Pakollinen akustinen mikroskooppitutkimus toisen uudelleenjuoksutuksen j\u00e4lkeen.<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Issues_and_Engineering_Solutions\"><\/span>Yleiset ongelmat ja tekniset ratkaisut<span class=\"ez-toc-section-end\"><\/span><\/h2><p><strong>Ongelma 1: QFN-komponentin siirtyminen toisen uudelleensulatusprosessin aikana<\/strong><\/p><ul class=\"wp-block-list\"><li>Ratkaisu: K\u00e4yt\u00e4 korkean l\u00e4mp\u00f6tilan liimaa ensimm\u00e4isen puolen juottamisen j\u00e4lkeen.<\/li>\n\n<li>Parametrit:K\u00e4yt\u00e4 liimaa, jonka kovettumistoleranssi on &gt;200 \u00b0C.<\/li><\/ul><p><strong>Ongelma 2: Komponentin pudotus aaltojuottamisen aikana (punainen liimapuoli)<\/strong><\/p><ul class=\"wp-block-list\"><li>Parannukset:<\/li><\/ul><ol class=\"wp-block-list\"><li>J\u00e4lkihoito UV-valolla punaisen liiman levitt\u00e4misen j\u00e4lkeen<\/li>\n\n<li>Esikuumenna 100 \u00b0C:seen ennen aaltojuottamista.<\/li><\/ol><p><strong>Ongelma 3: Liiallinen tyhjeneminen BGA-liitoksissa<\/strong><\/p><ul class=\"wp-block-list\"><li>Prosessin optimointi:<\/li>\n\n<li>Pident\u00e4\u00e4 juotospastan sulatusaikaa 8 tuntiin.<\/li>\n\n<li>K\u00e4yt\u00e4 typpiavusteista uudelleenjuoksutusta (O\u2082 &lt; 500ppm).<\/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\/double-sided-pcb-2.jpg\" alt=\"PCB-reflow-juottaminen\" class=\"wp-image-3563\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/double-sided-pcb-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/double-sided-pcb-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/double-sided-pcb-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Future_Process_Trends\"><\/span>Tulevaisuuden prosessisuuntaukset<span class=\"ez-toc-section-end\"><\/span><\/h2><ol class=\"wp-block-list\"><li><strong>Matalan l\u00e4mp\u00f6tilan juottaminen<\/strong>: Sn-Bi-juotosseokset pulssil\u00e4mmityksell\u00e4<\/li>\n\n<li><strong>\u00c4lyk\u00e4s l\u00e4mp\u00f6tilan s\u00e4\u00e4t\u00f6<\/strong>: Koneoppimiseen perustuva reaaliaikainen profiilin optimointi<\/li>\n\n<li><strong>Hybridiliitos<\/strong>: Yhdistetty juotospasta + johtavat liimaratkaisut<\/li><\/ol><p>Soveltamalla j\u00e4rjestelm\u00e4llisesti n\u00e4it\u00e4 keskeisi\u00e4 tekniikoita insin\u00f6\u00f6rit voivat saavuttaa yli 99,5 %:n ensimm\u00e4isen l\u00e4piviennin tuoton.Suosittelemme prosessin ikkunoiden seurantaj\u00e4rjestelmien k\u00e4ytt\u00f6\u00f6nottoa tuotantoymp\u00e4rist\u00f6jen jatkuvaa optimointia varten.<\/p>","protected":false},"excerpt":{"rendered":"<p>Kaksipuolinen piirilevyjen reflow-juottaminen on elektroniikan valmistuksen ydinprosessi, johon kuuluu juotospastan ja punaisen liiman prosessien valinta, l\u00e4mp\u00f6tilak\u00e4yr\u00e4n hallinta ja kaksipuoliset juotosstrategiat. T\u00e4ss\u00e4 artikkelissa analysoidaan kaksipuolisten piirilevyjen juotosprosessia, annetaan ratkaisuja yleisiin ongelmiin ja annetaan vinkkej\u00e4 prosessin optimointiin juottotuoton ja tuotannon tehokkuuden parantamiseksi.<\/p>","protected":false},"author":1,"featured_media":3564,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[109],"tags":[111,320],"class_list":["post-3560","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq","tag-pcb","tag-pcb-reflow-soldering"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to perform reflow soldering on double-sided PCB? - Topfastpcb<\/title>\n<meta name=\"description\" content=\"Master the key steps of double-sided PCB reflow soldering, from solder paste and red glue process selection to temperature control techniques, providing a complete soldering solution to solve common problems such as cold soldering and component loss.\" \/>\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\/how-to-perform-reflow-soldering-on-double-sided-pcb\/\" \/>\n<meta property=\"og:locale\" content=\"fi_FI\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to perform reflow soldering on double-sided PCB? 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