{"id":3841,"date":"2025-08-05T19:16:50","date_gmt":"2025-08-05T11:16:50","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=3841"},"modified":"2025-08-05T19:23:49","modified_gmt":"2025-08-05T11:23:49","slug":"pcb-annular-ring","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-annular-ring\/","title":{"rendered":"PCB rengasmainen rengas"},"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\/pcb-annular-ring\/#The_Core_Function_and_Design_Specifications_of_PCB_Ring_Circuits\" >PCB Ring Circuits -piirien ydintoiminto ja suunnittelun tekniset tiedot<\/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\/pcb-annular-ring\/#Three_Morphological_States_of_Annular_Rings\" >Rengasmaisten renkaiden kolme morfologista tilaa<\/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\/pcb-annular-ring\/#Engineering_Calculations_for_Annular_Ring_Dimensions\" >Tekniset laskelmat rengasrenkaan mitoille<\/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\/pcb-annular-ring\/#Industry_Standards_Process_Control\" >Teollisuuden standardit ja prosessinvalvonta<\/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\/pcb-annular-ring\/#Teardrop_Reinforcement_Engineering_Benefits\" >Teardrop Vahvistus: Tekniset hy\u00f6dyt<\/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\/pcb-annular-ring\/#Common_Issues_Solutions\" >Yleiset ongelmat ja ratkaisut<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Core_Function_and_Design_Specifications_of_PCB_Ring_Circuits\"><\/span>PCB Ring Circuits -piirien ydintoiminto ja suunnittelun tekniset tiedot<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Osoitteessa <a href=\"https:\/\/www.topfastpcb.com\/fi\/products\/\">painettujen piirilevyjen (PCB) valmistus<\/a>... <strong>rengasmainen rengas<\/strong> on perusrakenne, jolla varmistetaan luotettavat s\u00e4hk\u00f6liit\u00e4nn\u00e4t. T\u00e4m\u00e4 py\u00f6re\u00e4 metallityyny kiinnitt\u00e4\u00e4 komponenttien johtimet keskirei\u00e4n kautta ja muodostaa vakaat s\u00e4hk\u00f6liit\u00e4nn\u00e4t juottamalla. Rengasmaisten renkaiden ty\u00f6st\u00f6tarkkuus vaikuttaa paitsi yksitt\u00e4isen levyn suorituskykyyn my\u00f6s tuotannon tuottoon massavalmistuksessa.<\/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\/08\/PCB-Annular-Ring-2.jpg\" alt=\"PCB rengasmainen rengas\" class=\"wp-image-3846\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/PCB-Annular-Ring-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/PCB-Annular-Ring-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/PCB-Annular-Ring-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Three_Morphological_States_of_Annular_Rings\"><\/span>Rengasmaisten renkaiden kolme morfologista tilaa<span class=\"ez-toc-section-end\"><\/span><\/h3><ol class=\"wp-block-list\"><li><strong>Normaali tila<\/strong><br>Porattu reik\u00e4 on t\u00e4ydellisesti keskitetty tyynyn sis\u00e4\u00e4n, ja se muodostaa t\u00e4ydellisen kuparirenkaan. T\u00e4m\u00e4 ihanteellinen tila takaa optimaalisen virrankuljetuskyvyn ja mekaanisen lujuuden, mik\u00e4 v\u00e4hent\u00e4\u00e4 liit\u00e4nt\u00e4vastusta. <strong>15-20%<\/strong>.<\/li>\n\n<li><strong>Tangenttivaltio<\/strong><br>Kun poraus poikkeaa keskipisteest\u00e4, kuparirengas koskettaa rei\u00e4n reunaa toisella puolella, jolloin syntyy tangentti. T\u00e4m\u00e4 on yleist\u00e4 suurnopeusporauksessa ja voi v\u00e4hent\u00e4\u00e4 virtakapasiteettia seuraavasti <strong>30-40%<\/strong>. Nykyaikaiset piirilevytehtaat k\u00e4ytt\u00e4v\u00e4t visuaalisia tarkastusj\u00e4rjestelmi\u00e4 tangentin esiintymisen seuraamiseksi reaaliajassa.<\/li>\n\n<li><strong>Breakout State<\/strong><br>Vakava vika, jossa kuparirengas on kokonaan poikki ja aiheuttaa avoimen virtapiirin. T\u00e4m\u00e4 tapahtuu tyypillisesti silloin, kun porauspoikkeama ylitt\u00e4\u00e4 <strong>0.1mm<\/strong> ja se on merkitt\u00e4v\u00e4 syy PCB:n hylk\u00e4\u00e4miseen laadunvalvonnassa. <a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-aoi-automated-optical-inspection\/\">Automaattinen optinen tarkastus<\/a> (AOI) j\u00e4rjestelm\u00e4t havaitsevat t\u00e4llaiset viat tehokkaasti.<\/li><\/ol><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Engineering_Calculations_for_Annular_Ring_Dimensions\"><\/span>Tekniset laskelmat rengasrenkaan mitoille<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>OAR-kaava (OAR = Outer Annular Ring) Kaava<\/strong>:<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"464\" height=\"71\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Outer-Annular-Ring-OAR-Formula.jpg\" alt=\"PCB rengasmainen rengas\" class=\"wp-image-3842\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Outer-Annular-Ring-OAR-Formula.jpg 464w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Outer-Annular-Ring-OAR-Formula-300x46.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Outer-Annular-Ring-OAR-Formula-18x3.jpg 18w\" sizes=\"auto, (max-width: 464px) 100vw, 464px\" \/><\/figure><\/div><p>Pinnoitepaksuuden huomioon ottaminen:<\/p><ul class=\"wp-block-list\"><li><strong>PTH (Plated Through Hole)<\/strong>: Lis\u00e4\u00e4 <strong>0.10mm<\/strong> pinnoituskorvaus<\/li>\n\n<li><strong>NPTH (pinnoittamaton l\u00e4pireik\u00e4)<\/strong>: Ei lis\u00e4korvausta<\/li><\/ul><p><em>Esimerkkilaskelma<\/em>:<br>A <strong>0.60mm tyyny<\/strong> ja <strong>0,30mm valmis reik\u00e4 (PTH)<\/strong>:<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"473\" height=\"79\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Accounting-for-plating-thickness.jpg\" alt=\"PCB rengasmainen rengas\" class=\"wp-image-3843\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Accounting-for-plating-thickness.jpg 473w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Accounting-for-plating-thickness-300x50.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Accounting-for-plating-thickness-18x3.jpg 18w\" sizes=\"auto, (max-width: 473px) 100vw, 473px\" \/><\/figure><\/div><p><strong>Sis\u00e4isen rengasrenkaan (IAR) n\u00e4k\u00f6kohdat<\/strong>:<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"506\" height=\"69\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Inner-Annular-Ring-IAR-Considerations.jpg\" alt=\"PCB rengasmainen rengas\" class=\"wp-image-3844\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Inner-Annular-Ring-IAR-Considerations.jpg 506w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Inner-Annular-Ring-IAR-Considerations-300x41.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Inner-Annular-Ring-IAR-Considerations-18x2.jpg 18w\" sizes=\"auto, (max-width: 506px) 100vw, 506px\" \/><\/figure><\/div><p>Sis\u00e4kerrosten avaintekij\u00e4t:<\/p><ul class=\"wp-block-list\"><li>Laminointivirheiden kompensointi<\/li>\n\n<li>Sis\u00e4kerroksen kuparin paksuuden vaihtelut<\/li>\n\n<li>Kohdistustarkkuus monikerroksisissa levyiss\u00e4<\/li><\/ul><p><em>Esimerkkilaskelma<\/em>:<br>A <strong>0.50mm sis\u00e4tyyny<\/strong> ja <strong>0,20mm valmis reik\u00e4 (PTH)<\/strong>:<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"403\" height=\"72\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/0.20mm-finished-hole.jpg\" alt=\"PCB rengasmainen rengas\" class=\"wp-image-3845\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/0.20mm-finished-hole.jpg 403w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/0.20mm-finished-hole-300x54.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/0.20mm-finished-hole-18x3.jpg 18w\" sizes=\"auto, (max-width: 403px) 100vw, 403px\" \/><\/figure><\/div><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Industry_Standards_Process_Control\"><\/span>Teollisuuden standardit ja prosessinvalvonta<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Per <strong>IPC-6012<\/strong>, rengasrenkaan vaatimukset vaihtelevat piirilevytyypeitt\u00e4in:<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>PCB-tyyppi<\/th><th>Min. Ulompi rengas<\/th><th>Min. Sisempi rengasrengas<\/th><\/tr><\/thead><tbody><tr><td>J\u00e4ykk\u00e4<\/td><td>\u22650.05mm<\/td><td>\u22650.01mm<\/td><\/tr><tr><td>Joustava<\/td><td>\u22650.075mm<\/td><td>\u22650.025mm<\/td><\/tr><tr><td>J\u00e4ykk\u00e4-Flex<\/td><td>\u22650.06mm<\/td><td>\u22650.015mm<\/td><\/tr><\/tbody><\/table><\/figure><p><strong>Suunnittelusuositukset<\/strong>:<br>\u2714 Salli <strong>0.02-0.03mm<\/strong> prosessimarginaali<br>\u2714 Lis\u00e4\u00e4 renkaan leveytt\u00e4 <strong>20%<\/strong> suurtaajuuspiirej\u00e4 varten<br>\u2714 Tarkista virransietokyky suuritehoisten j\u00e4lkien osalta.<br>\u2714 Simuloidaan l\u00e4mp\u00f6j\u00e4nnityksen vaikutuksia rengasmaisiin renkaisiin.<\/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\/08\/PCB-Annular-Ring-1.jpg\" alt=\"PCB rengasmainen rengas\" class=\"wp-image-3847\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/PCB-Annular-Ring-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/PCB-Annular-Ring-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/PCB-Annular-Ring-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Teardrop_Reinforcement_Engineering_Benefits\"><\/span>Teardrop Vahvistus: Tekniset hy\u00f6dyt<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Kyynelpisarat parantavat rengasrenkaan luotettavuutta seuraavasti:<\/p><ol class=\"wp-block-list\"><li><strong>Mekaaninen lujuus<\/strong>: Lis\u00e4\u00e4 vetovastusta <strong>40%+<\/strong><\/li>\n\n<li><strong>Prosessin toleranssi<\/strong>: Korvaa <strong>\u00b10.05mm<\/strong> porauspoikkeamat<\/li>\n\n<li><strong>Luotettavuus<\/strong>: V\u00e4hent\u00e4\u00e4 l\u00e4mp\u00f6syklien aiheuttamia mikrohalkeamia.<\/li>\n\n<li><strong>Korjattavuus<\/strong>: Lievent\u00e4\u00e4 v\u00e4h\u00e4isest\u00e4 tangenssista johtuvia heikkoja yhteyksi\u00e4.<\/li><\/ol><p><strong>T\u00e4yt\u00e4nt\u00f6\u00f6npanon suuntaviivat<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Pisaran pituus = <strong>1.5-2x<\/strong> j\u00e4ljen leveys<\/li>\n\n<li>Siirtym\u00e4s\u00e4de \u2265 <strong>0.1mm<\/strong><\/li>\n\n<li>Optimoi muoto impedanssin jatkuvuutta varten suurnopeussignaaleissa.<\/li>\n\n<li>K\u00e4yt\u00e4 mikrotippoja (<strong>\u22640.15mm<\/strong>) tihe\u00e4sti asutuilla alueilla<\/li><\/ul><h3 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><\/h3><p><strong>Poran virheasennon est\u00e4minen<\/strong>:<\/p><ol class=\"wp-block-list\"><li>K\u00e4yt\u00e4 eritt\u00e4in tarkkaa CNC-porausta (<strong>\u22640.025mm<\/strong> tarkkuus)<\/li>\n\n<li>Optimoi porausparametrit (kierrosluku, sy\u00f6tt\u00f6nopeus).<\/li>\n\n<li>CCD-kohdistusj\u00e4rjestelmien k\u00e4ytt\u00f6\u00f6notto<\/li>\n\n<li>Vaihda poranter\u00e4t joka <strong>1500-2000<\/strong> rei\u00e4t<\/li><\/ol><p><strong>Riitt\u00e4m\u00e4tt\u00f6mien rengasrenkaiden k\u00e4sittely<\/strong>:<\/p><ol class=\"wp-block-list\"><li>Lis\u00e4\u00e4 tyynyn halkaisijaa (suositeltava ratkaisu)<\/li>\n\n<li>Pienenn\u00e4 reikien kokoa (huomioi komponenttien johdot)<\/li>\n\n<li>K\u00e4yt\u00e4 ep\u00e4symmetrisi\u00e4 tyynymalleja<\/li>\n\n<li>Sovelletaan via-in-pad-tekniikkaa (vaatii sekundaarisen pinnoituksen).<\/li><\/ol><p><strong>Laadunvalvonta massatuotannossa<\/strong>:<\/p><ol class=\"wp-block-list\"><li>Ensimm\u00e4isten kappaleiden t\u00e4ydellinen mittatarkastus<\/li>\n\n<li>Er\u00e4n\u00e4ytteenotto ja poikkileikkausanalyysi<\/li>\n\n<li>Reaaliaikainen poran sijainnin seuranta<\/li>\n\n<li>Keh\u00e4n leveytt\u00e4 koskevien SPC-ohjauskarttojen laatiminen.<\/li><\/ol><p>J\u00e4rjestelm\u00e4llisen suunnittelun ja tiukan prosessinvalvonnan avulla PCB-rengasrenkaat voivat t\u00e4ytt\u00e4\u00e4 korkean luotettavuuden vaatimukset, mik\u00e4 takaa elektronisten tuotteiden pitk\u00e4n aikav\u00e4lin vakauden. Insin\u00f6\u00f6rien tulisi tehd\u00e4 tiivist\u00e4 yhteisty\u00f6t\u00e4 valmistajien kanssa suunnitteluvaiheessa, jotta eritelm\u00e4t ja tuotantokapasiteetti saadaan tasapainoon.<\/p>","protected":false},"excerpt":{"rendered":"<p>M\u00e4\u00e4ritelm\u00e4, laskentamenetelm\u00e4t, valmistusstandardit ja PCB-renkaisiin liittyv\u00e4t yleiset ongelmat.T\u00e4ss\u00e4 artikkelissa syvennyt\u00e4\u00e4n rengasrenkaiden kriittiseen rooliin piirilevysuunnittelussa ja tarjotaan ammattimaisia suunnittelusuosituksia ja prosessinohjauskohtia piirilevyn luotettavuuden optimoimiseksi.<\/p>","protected":false},"author":1,"featured_media":3848,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[112],"tags":[338],"class_list":["post-3841","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-pcb-annular-ring"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - 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