{"id":5938,"date":"2026-07-20T08:41:00","date_gmt":"2026-07-20T00:41:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=5938"},"modified":"2026-06-25T15:01:12","modified_gmt":"2026-06-25T07:01:12","slug":"low-loss-pcb-materials","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/","title":{"rendered":"V\u00e4h\u00e4h\u00e4vi\u00f6iset piirilevyjen materiaalit selitettyn\u00e4"},"content":{"rendered":"<p>Signaalinopeuksien kasvaessa perinteiset piirilevyjen materiaalit ovat saavuttamassa suorituskykyns\u00e4 rajat. Vaikka tavallinen FR4-materiaali sopii edelleen moniin sovelluksiin, nykyaikaiset verkkolaitteet, teko\u00e4lylaskenta-alustat, nopeat tallennusj\u00e4rjestelm\u00e4t ja viestint\u00e4infrastruktuuri vaativat usein materiaaleja, joissa signaalih\u00e4vi\u00f6 on pienempi.<\/p><p>T\u00e4ss\u00e4 vaiheessa v\u00e4h\u00e4h\u00e4vi\u00f6iset piirilevymateriaalit nousevat t\u00e4rke\u00e4\u00e4n asemaan.<\/p><p>V\u00e4h\u00e4h\u00e4vi\u00f6iset laminaatit on suunniteltu v\u00e4hent\u00e4m\u00e4\u00e4n dielektrist\u00e4 vaimennusta, mink\u00e4 ansiosta signaalit kulkevat pidempi\u00e4 matkoja s\u00e4ilytt\u00e4en samalla signaalin eheyden. Niist\u00e4 on tullut yleinen valinta sovelluksissa, joissa k\u00e4ytet\u00e4\u00e4n useiden gigabittien tiedonsiirtonopeuksia ja korkeita taajuuksia.<\/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\/2026\/06\/Low-Loss-PCB-Materials.jpg\" alt=\"V\u00e4h\u00e4h\u00e4vi\u00f6iset piirilevyjen materiaalit\" class=\"wp-image-5939\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/Low-Loss-PCB-Materials.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/Low-Loss-PCB-Materials-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/Low-Loss-PCB-Materials-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\/low-loss-pcb-materials\/#What_Makes_a_PCB_Material_Low_Loss\" >Mik\u00e4 tekee piirilevymateriaalista v\u00e4h\u00e4h\u00e4vi\u00f6isen?<\/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\/low-loss-pcb-materials\/#Why_Standard_FR4_Has_Limitations\" >Miksi tavallisella FR4-levyll\u00e4 on rajoituksia<\/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\/low-loss-pcb-materials\/#Characteristics_of_Low_Loss_Materials\" >V\u00e4h\u00e4h\u00e4vi\u00f6isten materiaalien ominaisuudet<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#Lower_Dissipation_Factor\" >Pienempi h\u00e4vi\u00f6kerroin<\/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\/low-loss-pcb-materials\/#Stable_Dielectric_Constant\" >Vakaa dielektrisyysvakio<\/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\/low-loss-pcb-materials\/#Improved_High-Frequency_Performance\" >Parannettu korkeataajuuksien suorituskyky<\/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\/low-loss-pcb-materials\/#Better_Reliability\" >Parempi luotettavuus<\/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\/low-loss-pcb-materials\/#Typical_Df_Comparison\" >Tyypillinen Df-vertailu<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#Common_Types_of_Low_Loss_PCB_Materials\" >Yleisi\u00e4 v\u00e4h\u00e4h\u00e4vi\u00f6isi\u00e4 piirilevyjen materiaaleja<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#Enhanced_FR4_Systems\" >Parannetut FR4-j\u00e4rjestelm\u00e4t<\/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\/low-loss-pcb-materials\/#Hydrocarbon_Ceramic_Materials\" >Hiilivetypohjaiset keraamiset materiaalit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#PTFE-Based_Materials\" >PTFE-pohjaiset materiaalit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#High-Speed_Digital_Laminates\" >Nopeat digitaaliset laminaatit<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#Applications_That_Benefit_from_Low_Loss_Materials\" >Sovellukset, joissa hy\u00f6dynnet\u00e4\u00e4n v\u00e4h\u00e4h\u00e4vi\u00f6isi\u00e4 materiaaleja<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#Data_Center_Equipment\" >Tietokeskuksen laitteet<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#AI_Servers\" >AI-palvelimet<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#Telecommunication_Systems\" >Televiestint\u00e4j\u00e4rjestelm\u00e4t<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#High-Speed_Storage_Systems\" >Nopeat tallennusj\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-19\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#Cost_Considerations\" >Kustannusn\u00e4k\u00f6kohdat<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#Low_Loss_Materials_and_Stackup_Design\" >V\u00e4h\u00e4h\u00e4vi\u00f6iset materiaalit ja kerrostussuunnittelu<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#Choosing_the_Right_Material\" >Oikean materiaalin valinta<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#Data_Rate\" >Tiedonsiirtonopeus<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#Operating_Frequency\" >Toimintataajuus<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#Channel_Length\" >Kanavan pituus<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#Manufacturing_Requirements\" >Tuotantovaatimukset<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#Budget\" >Talousarvio<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/low-loss-pcb-materials\/#FAQ\" >FAQ<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Makes_a_PCB_Material_Low_Loss\"><\/span>Mik\u00e4 tekee piirilevymateriaalista v\u00e4h\u00e4h\u00e4vi\u00f6isen?<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Signaalin h\u00e4vi\u00f6 piirilevyss\u00e4 johtuu useista tekij\u00f6ist\u00e4, kuten johtimen h\u00e4vi\u00f6st\u00e4, pinnan ep\u00e4tasaisuudesta, liittimien liitoskohdista ja dielektrisest\u00e4 h\u00e4vi\u00f6st\u00e4.<\/p><p>N\u00e4ist\u00e4 tekij\u00f6ist\u00e4 dielektrinen h\u00e4vi\u00f6 riippuu suoraan itse laminaattimateriaalista.<\/p><p>Materiaalia pidet\u00e4\u00e4n yleens\u00e4 v\u00e4h\u00e4h\u00e4vi\u00f6isen\u00e4, kun se t\u00e4ytt\u00e4\u00e4 seuraavat vaatimukset:<\/p><ul class=\"wp-block-list\"><li>Alhainen h\u00e4vi\u00f6kerroin (Df)<\/li>\n\n<li>Vakaa dielektrisyysvakio (Dk)<\/li>\n\n<li>Tasainen s\u00e4hk\u00f6inen suorituskyky kaikilla taajuusalueilla<\/li>\n\n<li>V\u00e4hennetty lis\u00e4ysh\u00e4vi\u00f6<\/li><\/ul><p>Kuten selitet\u00e4\u00e4n kohdassa <strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/dk-and-df-values-in-pcb-materials\/\">PCB-materiaalien Dk- ja Df-arvot<\/a><\/strong>, h\u00e4vi\u00f6kerroin on yksi t\u00e4rkeimmist\u00e4 indikaattoreista, joita k\u00e4ytet\u00e4\u00e4n signaalin h\u00e4vi\u00f6ominaisuuksien arviointiin.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Standard_FR4_Has_Limitations\"><\/span>Miksi tavallisella FR4-levyll\u00e4 on rajoituksia<span class=\"ez-toc-section-end\"><\/span><\/h2><p>FR4 on edelleen yleisimmin k\u00e4ytetty piirilevyjen materiaali, koska se on kustannustehokas ja helposti saatavilla.<\/p><p>Sen s\u00e4hk\u00f6iset suorituskykyominaisuudet heikkenev\u00e4t kuitenkin taajuuksien ja datanopeuksien kasvaessa.<\/p><p>FR4:n tyypillisi\u00e4 ominaisuuksia ovat muun muassa:<\/p><ul class=\"wp-block-list\"><li>Dk: 4,2\u20134,8<\/li>\n\n<li>Df: 0,015\u20130,025<\/li><\/ul><p>Monien teollisuus- ja kulutustuotteiden osalta n\u00e4m\u00e4 arvot ovat t\u00e4ysin hyv\u00e4ksytt\u00e4vi\u00e4.<\/p><p>Seuraavanlaiset sovellukset kuitenkin:<\/p><ul class=\"wp-block-list\"><li>25G Ethernet<\/li>\n\n<li>56G PAM4<\/li>\n\n<li>112G-takalevyt<\/li>\n\n<li>Nopeat palvelinalustat<\/li><\/ul><p>vaativat usein pienemp\u00e4\u00e4 dielektrist\u00e4 h\u00e4vi\u00f6t\u00e4 kuin mit\u00e4 perinteinen FR4-materiaali pystyy tarjoamaan.<\/p><p>Lukijat, joille FR4-materiaalit ovat uutta, voivat tutustua <strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/fr4-pcb-material\/\">FR4-piirilevyjen materiaali selitettyn\u00e4<\/a><\/strong> lis\u00e4tietoja varten.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Characteristics_of_Low_Loss_Materials\"><\/span>V\u00e4h\u00e4h\u00e4vi\u00f6isten materiaalien ominaisuudet<span class=\"ez-toc-section-end\"><\/span><\/h2><p>V\u00e4h\u00e4h\u00e4vi\u00f6iset laminaatit on suunniteltu parantamaan signaalinsiirron suorituskyky\u00e4.<\/p><p>Yleisi\u00e4 piirteit\u00e4 ovat muun muassa:<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Lower_Dissipation_Factor\"><\/span>Pienempi h\u00e4vi\u00f6kerroin<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Merkitt\u00e4vin etu on pienentyneet dielektriset h\u00e4vi\u00f6t.<\/p><p>Pienemm\u00e4t Df-arvot auttavat:<\/p><ul class=\"wp-block-list\"><li>V\u00e4henn\u00e4 vaimennusta<\/li>\n\n<li>Silm\u00e4kaavioiden parantaminen<\/li>\n\n<li>Reittien pituuksien pident\u00e4minen<\/li>\n\n<li>Tasausvaatimusten v\u00e4hent\u00e4minen<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Stable_Dielectric_Constant\"><\/span>Vakaa dielektrisyysvakio<span class=\"ez-toc-section-end\"><\/span><\/h3><p>V\u00e4h\u00e4h\u00e4vi\u00f6isill\u00e4 materiaaleilla Dk-arvot pysyv\u00e4t usein tasaisempina laajemmilla taajuusalueilla.<\/p><p>T\u00e4m\u00e4 parantaa:<\/p><ul class=\"wp-block-list\"><li>Impedanssin s\u00e4\u00e4t\u00f6<\/li>\n\n<li>Signaalien ajoitus<\/li>\n\n<li>Differentiaaliparien sovitus<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Improved_High-Frequency_Performance\"><\/span>Parannettu korkeataajuuksien suorituskyky<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Monet v\u00e4h\u00e4h\u00e4vi\u00f6iset j\u00e4rjestelm\u00e4t on optimoitu taajuuksille, joilla tavallisessa FR4-materiaalissa alkaa ilmet\u00e4 merkitt\u00e4v\u00e4\u00e4 vaimennusta.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Better_Reliability\"><\/span>Parempi luotettavuus<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Huippuluokan laminaattij\u00e4rjestelm\u00e4t tarjoavat usein my\u00f6s parempia l\u00e4mp\u00f6- ja mekaanisia ominaisuuksia.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Typical_Df_Comparison\"><\/span>Tyypillinen Df-vertailu<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Seuraavassa taulukossa esitet\u00e4\u00e4n yleisimpien piirilevyjen materiaalien vertailu.<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Materiaali<\/th><th>Tyypillinen Df<\/th><\/tr><tr><td>Standardi FR4<\/td><td>0.015-0.025<\/td><\/tr><tr><td>Korkean lasittumisl\u00e4mp\u00f6tilan FR4<\/td><td>0,012\u20130,020<\/td><\/tr><tr><td>V\u00e4h\u00e4h\u00e4vi\u00f6inen FR4<\/td><td>0,006\u20130,010<\/td><\/tr><tr><td>Megtron 6<\/td><td>~0.002<\/td><\/tr><tr><td>Rogers 4350B<\/td><td>~0.0037<\/td><\/tr><tr><td>PTFE-materiaalit<\/td><td>0,0009\u20130,002<\/td><\/tr><\/tbody><\/table><\/figure><p>Mit\u00e4 pienempi Df-arvo on, sit\u00e4 pienempi on dielektrinen h\u00e4vi\u00f6.<\/p><p>Materiaalivalinnassa tulisi kuitenkin aina ottaa huomioon suunnittelun kokonaisvaatimukset sen sijaan, ett\u00e4 keskitytt\u00e4isiin vain yhteen yksitt\u00e4iseen ominaisuuteen.<\/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\/2026\/06\/Low-Loss-PCB-Materials-1.jpg\" alt=\"V\u00e4h\u00e4h\u00e4vi\u00f6iset piirilevyjen materiaalit\" class=\"wp-image-5940\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/Low-Loss-PCB-Materials-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/Low-Loss-PCB-Materials-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/Low-Loss-PCB-Materials-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Types_of_Low_Loss_PCB_Materials\"><\/span>Yleisi\u00e4 v\u00e4h\u00e4h\u00e4vi\u00f6isi\u00e4 piirilevyjen materiaaleja<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Enhanced_FR4_Systems\"><\/span>Parannetut FR4-j\u00e4rjestelm\u00e4t<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Monet laminaattitoimittajat tarjoavat parannettuja FR4-koostumuksia, jotka on suunniteltu suuremmilla nopeuksilla toimiviin sovelluksiin.<\/p><p>N\u00e4ist\u00e4 materiaaleista l\u00f6ytyy:<\/p><ul class=\"wp-block-list\"><li>Parempi signaalin suorituskyky<\/li>\n\n<li>Tuttuja k\u00e4sittelyominaisuuksia<\/li>\n\n<li>Edullisempi hinta verrattuna korkealaatuisiin RF-laminaatteihin<\/li><\/ul><p>Niit\u00e4 k\u00e4ytet\u00e4\u00e4n usein verkko- ja palvelintuotteissa.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Hydrocarbon_Ceramic_Materials\"><\/span>Hiilivetypohjaiset keraamiset materiaalit<span class=\"ez-toc-section-end\"><\/span><\/h3><p>N\u00e4iss\u00e4 laminaateissa yhdistyv\u00e4t hiilivetypohjaiset hartsij\u00e4rjestelm\u00e4t ja keraamiset t\u00e4yteaineet.<\/p><p>Etuihin kuuluvat:<\/p><ul class=\"wp-block-list\"><li>Pienempi tappio<\/li>\n\n<li>Vakaat dielektriset ominaisuudet<\/li>\n\n<li>Hyv\u00e4 valmistettavuus<\/li><\/ul><p>Useissa suosituissa RF-materiaaleissa hy\u00f6dynnet\u00e4\u00e4n t\u00e4t\u00e4 menetelm\u00e4\u00e4.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PTFE-Based_Materials\"><\/span>PTFE-pohjaiset materiaalit<span class=\"ez-toc-section-end\"><\/span><\/h3><p>PTFE tarjoaa piirilevyjen valmistuksessa markkinoiden alhaisimpia dielektrisi\u00e4 h\u00e4vi\u00f6it\u00e4.<\/p><p>Sovelluksia ovat mm:<\/p><ul class=\"wp-block-list\"><li>Tutkaj\u00e4rjestelm\u00e4t<\/li>\n\n<li>Satelliittiviestint\u00e4<\/li>\n\n<li>RF-vahvistimet<\/li>\n\n<li>Mikroaaltopiirit<\/li><\/ul><p>Aiheesta kirjoitettu artikkeli <strong>PTFE-piirilevymateriaali<\/strong> tarkastellaan n\u00e4it\u00e4 aineistoja tarkemmin.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High-Speed_Digital_Laminates\"><\/span>Nopeat digitaaliset laminaatit<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Tuotteet, kuten:<\/p><ul class=\"wp-block-list\"><li>Megtron-sarja<\/li>\n\n<li>Isola I-Speed<\/li>\n\n<li>Tachyon<\/li>\n\n<li>Nelcon suurinopeuksiset materiaalit<\/li><\/ul><p>on suunniteltu nimenomaan nykyaikaisille digitaalisille j\u00e4rjestelmille.<\/p><p>N\u00e4m\u00e4 materiaalit t\u00e4ytt\u00e4v\u00e4t aukon perinteisen FR4:n ja erikoistuneiden RF-substraattien v\u00e4lill\u00e4.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Applications_That_Benefit_from_Low_Loss_Materials\"><\/span>Sovellukset, joissa hy\u00f6dynnet\u00e4\u00e4n v\u00e4h\u00e4h\u00e4vi\u00f6isi\u00e4 materiaaleja<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Data_Center_Equipment\"><\/span>Tietokeskuksen laitteet<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Nykyaikaiset kytkimet ja reitittimet toimivat yh\u00e4 suuremmilla tiedonsiirtonopeuksilla.<\/p><p>Signaalin h\u00e4vi\u00e4minen nousee kriittiseksi suunnittelutekij\u00e4ksi kanavan pituuden kasvaessa.<\/p><p>V\u00e4h\u00e4h\u00e4vi\u00f6iset materiaalit auttavat s\u00e4ilytt\u00e4m\u00e4\u00e4n signaalin laadun koko j\u00e4rjestelm\u00e4ss\u00e4.<\/p><p>Tulevissa artikkeleissa k\u00e4sitell\u00e4\u00e4n muun muassa <strong>Tietokeskuslaitteiden piirilevyjen materiaalit<\/strong>.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"AI_Servers\"><\/span>AI-palvelimet<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Teko\u00e4lyinfrastruktuuri edellytt\u00e4\u00e4 nopeaa tiedonsiirtoa prosessoreiden, kiihdyttimien ja muistilaitteiden v\u00e4lill\u00e4.<\/p><p>V\u00e4h\u00e4h\u00e4vi\u00f6iset laminaatit edist\u00e4v\u00e4t seuraavia asioita:<\/p><ul class=\"wp-block-list\"><li>Suuri kaistanleveys<\/li>\n\n<li>Pienempi viive<\/li>\n\n<li>Parannettu signaalin eheysN\/OFF)<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Telecommunication_Systems\"><\/span>Televiestint\u00e4j\u00e4rjestelm\u00e4t<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Sovelluksia ovat mm:<\/p><ul class=\"wp-block-list\"><li>Optiset verkot<\/li>\n\n<li>5G-infrastruktuuri<\/li>\n\n<li>Backhaul-laitteet<\/li>\n\n<li>Langattoman viestinn\u00e4n laitteistot<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High-Speed_Storage_Systems\"><\/span>Nopeat tallennusj\u00e4rjestelm\u00e4t<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Yritysk\u00e4ytt\u00f6\u00f6n tarkoitetut tallennusalustat perustuvat usein v\u00e4h\u00e4h\u00e4vi\u00f6isiin materiaaleihin, jotta ne pystyv\u00e4t tukemaan nopeita liit\u00e4nt\u00f6j\u00e4 ja pitki\u00e4 signaalireittej\u00e4.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cost_Considerations\"><\/span>Kustannusn\u00e4k\u00f6kohdat<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Yksi syy, miksi tavallinen FR4 on edelleen suosittu, on hinta.<\/p><p>V\u00e4h\u00e4h\u00e4vi\u00f6iset materiaalit lis\u00e4\u00e4v\u00e4t yleens\u00e4 piirilevyjen valmistuskustannuksia seuraavista syist\u00e4:<\/p><ul class=\"wp-block-list\"><li>Laminaattien korkeammat hinnat<\/li>\n\n<li>Monimutkaisemmat kerrostusvaatimukset<\/li>\n\n<li>Lis\u00e4ty\u00f6 insin\u00f6\u00f6rien osalta<\/li><\/ul><p>Suorituskykyedut on perusteltava lis\u00e4kustannuksilla.<\/p><p>Monissa tapauksissa vain tietyt kerrokset vaativat v\u00e4h\u00e4h\u00e4vi\u00f6isi\u00e4 materiaaleja, mink\u00e4 ansiosta suunnittelijat voivat k\u00e4ytt\u00e4\u00e4 hybridirakenteita, joissa suorituskyky ja budjetti ovat tasapainossa.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Low_Loss_Materials_and_Stackup_Design\"><\/span>V\u00e4h\u00e4h\u00e4vi\u00f6iset materiaalit ja kerrostussuunnittelu<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Materiaalivalintaa ei voida erottaa kerrostussuunnittelusta.<\/p><p>Yhdess\u00e4 arvioitavia tekij\u00f6it\u00e4 ovat muun muassa:<\/p><ul class=\"wp-block-list\"><li>Kerrosten lukum\u00e4\u00e4r\u00e4<\/li>\n\n<li>Ytimen paksuus<\/li>\n\n<li>Prepreg-valinta<\/li>\n\n<li>Kuparin karheus<\/li>\n\n<li>Kohdeimpedanssi<\/li><\/ul><p>Kuten on k\u00e4sitelty <strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-core-and-prepreg\/\">PCB-ydin- ja prepreg-materiaalit<\/a><\/strong>, dielektrinen et\u00e4isyys vaikuttaa suoraan impedanssiin ja signaalin k\u00e4ytt\u00e4ytymiseen.<\/p><p>Hyvin suunniteltu kerrostusrakenne vaikuttaa suorituskykyyn usein yht\u00e4 paljon kuin materiaali itsess\u00e4\u00e4n.<\/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\/2026\/06\/Low-Loss-PCB-Materials-2.jpg\" alt=\"V\u00e4h\u00e4h\u00e4vi\u00f6iset piirilevyjen materiaalit\" class=\"wp-image-5941\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/Low-Loss-PCB-Materials-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/Low-Loss-PCB-Materials-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/Low-Loss-PCB-Materials-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Choosing_the_Right_Material\"><\/span>Oikean materiaalin valinta<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Arvioidessaan v\u00e4h\u00e4h\u00e4vi\u00f6isi\u00e4 laminaatteja insin\u00f6\u00f6rien tulisi ottaa huomioon seuraavat seikat:<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Data_Rate\"><\/span>Tiedonsiirtonopeus<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Suuremmat tiedonsiirtonopeudet lis\u00e4\u00e4v\u00e4t yleens\u00e4 dielektrisen h\u00e4vi\u00f6n pienuuden merkityst\u00e4.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Operating_Frequency\"><\/span>Toimintataajuus<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Radio- ja mikroaaltosuunnittelu vaatii usein erikoismateriaaleja.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Channel_Length\"><\/span>Kanavan pituus<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Pidemm\u00e4t signaalireitit hy\u00f6tyv\u00e4t yleens\u00e4 enemm\u00e4n v\u00e4h\u00e4h\u00e4vi\u00f6isist\u00e4 materiaaleista.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Manufacturing_Requirements\"><\/span>Tuotantovaatimukset<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Jotkin materiaalit vaativat erityisi\u00e4 poraus-, laminointi- tai k\u00e4sittelymenetelmi\u00e4.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Budget\"><\/span>Talousarvio<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Materiaalivalinnan tulisi olla linjassa tuotteen suorituskykytavoitteiden ja markkinoiden odotusten kanssa.<\/p><p>Tavoitteena ei ole valita saatavilla olevaa materiaalia, jolla on pienimm\u00e4t h\u00e4vi\u00f6t, vaan kyseiseen k\u00e4ytt\u00f6tarkoitukseen parhaiten sopivaa materiaalia.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2><div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1782369858481\"><strong class=\"schema-faq-question\">K: Mik\u00e4 on v\u00e4h\u00e4h\u00e4vi\u00f6inen piirilevymateriaali?<\/strong> <p class=\"schema-faq-answer\">A: V\u00e4h\u00e4h\u00e4vi\u00f6inen piirilevymateriaali on laminaatti, joka on suunniteltu v\u00e4hent\u00e4m\u00e4\u00e4n dielektrist\u00e4 vaimennusta ja parantamaan signaalin eheytt\u00e4 korkeilla taajuuksilla tai suurilla tiedonsiirtonopeuksilla.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782369873722\"><strong class=\"schema-faq-question\">K: Miksi v\u00e4h\u00e4h\u00e4vi\u00f6iset materiaalit ovat t\u00e4rkeit\u00e4?<\/strong> <p class=\"schema-faq-answer\">A: Ne auttavat minimoimaan signaalin heikkenemist\u00e4, jolloin signaalit kulkevat pidempi\u00e4 matkoja paremmalla laadulla.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782369886352\"><strong class=\"schema-faq-question\">K: Onko v\u00e4h\u00e4h\u00e4vi\u00f6inen materiaali sama asia kuin RF-materiaali?<\/strong> <p class=\"schema-faq-answer\">A: Ei aina. Jotkut v\u00e4h\u00e4h\u00e4vi\u00f6iset materiaalit on suunniteltu pikemminkin suurinopeuksisille digitaalisille j\u00e4rjestelmille kuin RF-sovelluksille.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782369900034\"><strong class=\"schema-faq-question\">K: Voiko tavallista FR4-levy\u00e4 k\u00e4ytt\u00e4\u00e4 suurinopeuksisissa suunnittelukohteissa?<\/strong> <p class=\"schema-faq-answer\">V: Joissakin tapauksissa kyll\u00e4. Eritt\u00e4in suuret tiedonsiirtonopeudet edellytt\u00e4v\u00e4t kuitenkin usein materiaaleja, joiden dielektrinen h\u00e4vi\u00f6 on pienempi.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782369914419\"><strong class=\"schema-faq-question\">K: Mill\u00e4 toimialoilla k\u00e4ytet\u00e4\u00e4n yleisesti v\u00e4h\u00e4h\u00e4vi\u00f6isi\u00e4 laminaatteja?<\/strong> <p class=\"schema-faq-answer\">A: Verkko-, tietoliikenne-, teko\u00e4lylaskenta-, datakeskus-, ilmailu- ja avaruusteollisuus sek\u00e4 edistyksellinen teollisuuselektroniikka hy\u00f6dynt\u00e4v\u00e4t usein v\u00e4h\u00e4h\u00e4vi\u00f6isi\u00e4 piirilevymateriaaleja.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>V\u00e4h\u00e4h\u00e4vi\u00f6iset piirilevy materiaalit on suunniteltu v\u00e4hent\u00e4m\u00e4\u00e4n dielektrist\u00e4 vaimennusta ja parantamaan signaalin eheytt\u00e4 nopeissa digitaalisissa ja RF-sovelluksissa. Verrattuna tavalliseen FR4-materiaaliin n\u00e4m\u00e4 laminaatit tarjoavat pienemm\u00e4t h\u00e4vi\u00f6kertoimet, vakaammat dielektriset ominaisuudet ja paremman suorituskyvyn korkeilla taajuuksilla. Niit\u00e4 k\u00e4ytet\u00e4\u00e4n laajalti verkkolaitteissa, teko\u00e4lypalvelimissa, datakeskuksissa, tietoliikenneinfrastruktuurissa ja edistyneiss\u00e4 laskentaymp\u00e4rist\u00f6iss\u00e4.<\/p>","protected":false},"author":1,"featured_media":5942,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[484],"class_list":["post-5938","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-pcb-material"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Low Loss PCB Materials Explained<\/title>\n<meta name=\"description\" content=\"Discover how low loss PCB materials improve signal integrity, reduce insertion loss, and support high-speed digital and RF applications. 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