{"id":3636,"date":"2025-07-15T14:42:44","date_gmt":"2025-07-15T06:42:44","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=3636"},"modified":"2025-07-15T15:01:35","modified_gmt":"2025-07-15T07:01:35","slug":"what-is-the-shelf-life-of-pcb","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-shelf-life-of-pcb\/","title":{"rendered":"Mik\u00e4 on PCB:n s\u00e4ilyvyysaika?"},"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\/what-is-the-shelf-life-of-pcb\/#Factors_affecting_the_shelf_life_of_PCB\" >PCB:n s\u00e4ilyvyyteen vaikuttavat tekij\u00e4t<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-shelf-life-of-pcb\/#Surface_treatment_process\" >Pintak\u00e4sittelyprosessi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-shelf-life-of-pcb\/#Storage_conditions\" >Varastointiolosuhteet<\/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\/what-is-the-shelf-life-of-pcb\/#Material_properties\" >Materiaalin ominaisuudet<\/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\/what-is-the-shelf-life-of-pcb\/#Expired_PCB_Disposal_Methods\" >Vanhentuneet PCB:n h\u00e4vitt\u00e4mismenetelm\u00e4t<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-shelf-life-of-pcb\/#Failure_Mode_Analysis\" >Vikaantumistapa-analyysi<\/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\/what-is-the-shelf-life-of-pcb\/#Tiered_Handling_Solutions\" >Porrastetut k\u00e4sittelyratkaisut<\/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:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-shelf-life-of-pcb\/#Engineering_Practices_to_Extend_PCB_Shelf_Life\" >Tekniset k\u00e4yt\u00e4nn\u00f6t PCB:n s\u00e4ilyvyysajan pident\u00e4miseksi<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-shelf-life-of-pcb\/#Advanced_Packaging_Technology\" >Kehittynyt pakkaustekniikka<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-shelf-life-of-pcb\/#Optimized_Surface_Finish_Selection\" >Optimoitu pintak\u00e4sittelyn valinta<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-shelf-life-of-pcb\/#Smart_Monitoring_Systems\" >\u00c4lykk\u00e4\u00e4t valvontaj\u00e4rjestelm\u00e4t<\/a><\/li><\/ul><\/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\/what-is-the-shelf-life-of-pcb\/#Risk_Assessment_for_Using_Expired_PCBs\" >Vanhentuneiden PCB-yhdisteiden k\u00e4yt\u00f6n riskinarviointi<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-shelf-life-of-pcb\/#Mandatory_Inspection_Items\" >Pakolliset tarkastuskohteet<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-shelf-life-of-pcb\/#Risk_Mitigation_Measures\" >Riskien lievent\u00e4mistoimenpiteet<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Factors_affecting_the_shelf_life_of_PCB\"><\/span>PCB:n s\u00e4ilyvyyteen vaikuttavat tekij\u00e4t<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Surface_treatment_process\"><\/span>Pintak\u00e4sittelyprosessi<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Piirilevyn pinnan viimeistely m\u00e4\u00e4ritt\u00e4\u00e4, kuinka kauan se kest\u00e4\u00e4 hyllyss\u00e4. Sen hapettumiskest\u00e4vyydess\u00e4 ja kosteussuojauksessa on merkitt\u00e4vi\u00e4 eroja.<\/p><ul class=\"wp-block-list\"><li><strong>HASL (Hot Air Solder Leveling): <\/strong>T\u00e4m\u00e4 on tunnettu prosessi, mutta se toimii vain noin kuusi kuukautta ja voi joskus johtaa tinaoksidin muodostumiseen.<\/li>\n\n<li><strong>ENIG (Electroless Nickel Immersion Gold)<\/strong>: 12 kuukauden s\u00e4ilyvyysaika, nikkelin diffuusiosta johtuva \"mustan tyynyn\" riski.<\/li>\n\n<li><strong>Upotushopea<\/strong>: S\u00e4ilyvyysaika vain 3 kuukautta, mik\u00e4 lis\u00e4\u00e4 hopean siirtymisen riski\u00e4 ajan my\u00f6t\u00e4.<\/li>\n\n<li><strong>OSP (orgaaninen juotettavuuden s\u00e4il\u00f6nt\u00e4aine)<\/strong>: 3-6 kuukautta, vaatii ilmatiiviin sulkemisen hajoamisen est\u00e4miseksi.<\/li>\n\n<li><strong>Kova kultaus<\/strong>: Erikoissovelluksiin, s\u00e4ilyvyysaika enint\u00e4\u00e4n 24 kuukautta.<\/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-shelf-life-1.jpg\" alt=\"PCB:n s\u00e4ilyvyysaika\" class=\"wp-image-3640\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Storage_conditions\"><\/span>Varastointiolosuhteet<span class=\"ez-toc-section-end\"><\/span><\/h3><p>IPC-1601-standardien mukaisten varastointiymp\u00e4rist\u00f6jen on t\u00e4ytett\u00e4v\u00e4:<\/p><ul class=\"wp-block-list\"><li><strong>L\u00e4mp\u00f6tilan ja kosteuden s\u00e4\u00e4t\u00f6<\/strong>:<\/li>\n\n<li>Optimaalinen l\u00e4mp\u00f6tila-alue: 20 \u00b1 5 \u00b0C (\u00e4\u00e4riarvot enint\u00e4\u00e4n 15-30 \u00b0C).<\/li>\n\n<li>Kosteusvaatimukset: 30-50% RH (enint\u00e4\u00e4n 70%): kosteusvaatimukset: 30-50% RH (enint\u00e4\u00e4n 70%)<\/li>\n\n<li><strong>Pakkausstandardit<\/strong>:<\/li>\n\n<li>Tyhji\u00f6pakatut alumiinifoliopussit, joissa on &lt;5%-kosteusindikaattorikortit.<\/li>\n\n<li>Kuivausaineen k\u00e4ytt\u00f6 \u226520g\/m\u00b3 pakkaustilavuudesta<\/li>\n\n<li><strong>Valosuojaus<\/strong>: UV-altistus nopeuttaa OSP-kalvon hajoamista<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Material_properties\"><\/span>Materiaalin ominaisuudet<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Standard FR-4-levyt<\/strong>: Teoreettinen k\u00e4ytt\u00f6ik\u00e4 5-10 vuotta (avaamattomana).<\/li>\n\n<li><strong>Suurtaajuusmateriaalit (esim. PTFE)<\/strong>: K\u00e4ytett\u00e4v\u00e4 3 vuoden kuluessa<\/li>\n\n<li><strong>HDI-levyt<\/strong>: Lyhyempi s\u00e4ilyvyysaika (20%:n v\u00e4hennys) ohuempien dielektristen kerrosten vuoksi.<\/li>\n\n<li><strong>Raskaat kuparilevyt (\u22653oz)<\/strong>: Vaatii erityist\u00e4 huomiota sis\u00e4kerroksen hapettumisriskiin.<\/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-shelf-life-1-1.jpg\" alt=\"PCB:n s\u00e4ilyvyysaika\" class=\"wp-image-3641\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-1-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-1-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-1-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><p>Tarvitsetko ammattimaista PCB-s\u00e4ilyvyyden arviointia? <a href=\"https:\/\/www.topfastpcb.com\/fi\/contact\/\">Ota yhteytt\u00e4 luotettavuussuunnittelutiimiimme ja pyyd\u00e4 ilmainen arviointi<\/a>.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Expired_PCB_Disposal_Methods\"><\/span>Vanhentuneet PCB:n h\u00e4vitt\u00e4mismenetelm\u00e4t<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Failure_Mode_Analysis\"><\/span>Vikaantumistapa-analyysi<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Metallikerroksen hapetus<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Nikkelin diffuusio kultakerrokseen ENIG-levyiss\u00e4 (&gt;12 kuukautta).<\/li>\n\n<li>Lis\u00e4\u00e4ntynyt tinalevyjen riski HASL-levyiss\u00e4<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Substraatin hajoaminen<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Hartsin hydrolyysi alentaa Tg-arvoa.<\/li>\n\n<li>Kerrosten v\u00e4linen sidoslujuus laskee \u226515% (IPC-TM-650-testi).<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Kosteuden imeytymisriskit<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>MSL-luokituksen alentaminen (esim. MSL3:sta MSL2:een).<\/li>\n\n<li>H\u00f6yrynpaine ylitt\u00e4\u00e4 alustan raja-arvot uudelleenjuoksutuksen aikana.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tiered_Handling_Solutions\"><\/span>Porrastetut k\u00e4sittelyratkaisut<span class=\"ez-toc-section-end\"><\/span><\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Ylitetty Kesto<\/th><th>Hoitoprosessi<\/th><th>Laadunvalvontapisteet<\/th><\/tr><\/thead><tbody><tr><td>\u22642 kuukautta<\/td><td>120\u00b0C\/1h paisto<\/td><td>Paiston j\u00e4lkeinen kosteuspitoisuus &lt;0.1%<\/td><\/tr><tr><td>2-6 kuukautta<\/td><td>120\u00b0C\/2h vaiheittainen paisto<\/td><td>TMA:n delaminaatiotestaus vaaditaan<\/td><\/tr><tr><td>6-12 kuukautta<\/td><td>120\u00b0C\/4h + typpisuojaus<\/td><td>Pakollinen juotettavuustestaus<\/td><\/tr><tr><td>&gt;12 kuukautta<\/td><td>Suositeltava h\u00e4vitt\u00e4minen<\/td><td>N\u00e4ytteiden l\u00e4mp\u00f6shokkitestaus<\/td><\/tr><\/tbody><\/table><\/figure><p><strong>Erityiset hoitotekniikat<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Typpi reflow-juottaminen (O\u2082-pitoisuus &lt;100 ppm)<\/li>\n\n<li>Eritt\u00e4in aktiivisen, ei-puhdistuvan juotospastan k\u00e4ytt\u00f6 (esim. ROL0-luokka).<\/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-shelf-life-2.jpg\" alt=\"PCB:n s\u00e4ilyvyysaika\" class=\"wp-image-3642\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-shelf-life-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Engineering_Practices_to_Extend_PCB_Shelf_Life\"><\/span>Tekniset k\u00e4yt\u00e4nn\u00f6t PCB:n s\u00e4ilyvyysajan pident\u00e4miseksi<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Advanced_Packaging_Technology\"><\/span>Kehittynyt pakkaustekniikka<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Monikerroksinen suojapakkaus<\/strong>:<\/li><\/ul><ol class=\"wp-block-list\"><li>Sis\u00e4kerros: Antistaattinen alumiinifoliopussi<\/li>\n\n<li>Keskikerros: Hapenabsorboija + kosteusindikaattorikortti<\/li>\n\n<li>P\u00e4\u00e4llystekerros: EPE-pehmuste<\/li><\/ol><ul class=\"wp-block-list\"><li><strong>Pitk\u00e4aikaisvarastointiratkaisut<\/strong>:<\/li>\n\n<li>Typen varastointi (O\u2082-pitoisuus &lt;0,5%)<\/li>\n\n<li>Matalassa l\u00e4mp\u00f6tilassa varastointi -10 \u00b0C:ssa (kondensaation est\u00e4minen vaaditaan).<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Optimized_Surface_Finish_Selection\"><\/span>Optimoitu pintak\u00e4sittelyn valinta<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Eritt\u00e4in luotettavat sovellukset<\/strong>: ENEPIG (18 kuukauden s\u00e4ilyvyysaika)<\/li>\n\n<li><strong>Kustannusherk\u00e4t hankkeet<\/strong>: ImAg+OSP-hybridiprosessi<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Smart_Monitoring_Systems\"><\/span>\u00c4lykk\u00e4\u00e4t valvontaj\u00e4rjestelm\u00e4t<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Ota k\u00e4ytt\u00f6\u00f6n IoT-antureita reaaliaikaista seurantaa varten:<\/p><ul class=\"wp-block-list\"><li>Varaston l\u00e4mp\u00f6tilan\/kosteuden vaihtelut<\/li>\n\n<li>Pussin sis\u00e4isen paineen muutokset<\/li>\n\n<li>Materiaalin v\u00e4rj\u00e4ytyminen (konen\u00e4\u00f6n avulla)<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Risk_Assessment_for_Using_Expired_PCBs\"><\/span>Vanhentuneiden PCB-yhdisteiden k\u00e4yt\u00f6n riskinarviointi<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mandatory_Inspection_Items\"><\/span>Pakolliset tarkastuskohteet<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Juotettavuuden testaus<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>IPC-J-STD-003B-standardien mukaisesti<\/li>\n\n<li>Juotoksen levinneisyysalueen on oltava suurempi kuin 95%<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Luotettavuuden todentaminen<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>L\u00e4mp\u00f6syklitestit (-55\u00b0C ~ 125\u00b0C, 100 sykli\u00e4)<\/li>\n\n<li>Painekattilatesti (121\u00b0C\/100%RH, 96 tuntia).<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Risk_Mitigation_Measures\"><\/span>Riskien lievent\u00e4mistoimenpiteet<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>100% Ensimm\u00e4isten kappaleiden tarkastus + suurennettu juotosliitoksen tarkastus<\/li>\n\n<li>Lis\u00e4vanhentamisseulonta (48h\/85\u00b0C)<\/li>\n\n<li>Varatut testialustat levyn reunoilla<\/li><\/ul><p><\/p>","protected":false},"excerpt":{"rendered":"<p>Piirilevyjen kest\u00e4vyyteen vaikuttavat kolme p\u00e4\u00e4asiallista asiaa: miten niit\u00e4 k\u00e4sitell\u00e4\u00e4n valmistuksen aikana, miten niit\u00e4 s\u00e4ilytet\u00e4\u00e4n ja mit\u00e4 piirilevy itse tarvitsee. Vanhentuneille PCB-levyille on olemassa k\u00e4sittelysuunnitelma, joka on luokiteltu, ja tekninen suunnitelma PCB-levyjen s\u00e4ilyvyysajan pident\u00e4miseksi. Suunnitelmaan sis\u00e4ltyy kehittynytt\u00e4 pakkaustekniikkaa, parannettuja pintak\u00e4sittelyvaihtoehtoja ja \u00e4lykk\u00e4it\u00e4 valvontaj\u00e4rjestelmi\u00e4. Kaikki t\u00e4m\u00e4 antaa elektroniikkavalmistusyrityksille t\u00e4ydellisen piirilevyjen k\u00e4ytt\u00f6i\u00e4n hallintaratkaisun.<\/p>","protected":false},"author":1,"featured_media":3638,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[109],"tags":[323],"class_list":["post-3636","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq","tag-pcb-shelf-life"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is the shelf life of PCB? - Topfastpcb<\/title>\n<meta name=\"description\" content=\"The lifespan of PCBs can be anywhere from six months to 10 years. 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