{"id":3689,"date":"2025-07-26T08:19:00","date_gmt":"2025-07-26T00:19:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=3689"},"modified":"2025-07-25T11:20:00","modified_gmt":"2025-07-25T03:20:00","slug":"what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/tr\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/","title":{"rendered":"Bir PCB \u00fczerindeki doldurulmam\u0131\u015f lehim pedlerinin amac\u0131 nedir?"},"content":{"rendered":"<p>\u00dcretim s\u0131ras\u0131nda <a href=\"https:\/\/www.topfastpcb.com\/tr\/blog\/printed-circuit-board-pcb\/\">PCB<\/a> devre kartlar\u0131, elektronik bile\u015fenler ve devre kart\u0131 aras\u0131ndaki elektrik ba\u011flant\u0131lar\u0131, devre kart\u0131n\u0131n y\u00fczeyine kablo d\u00f6\u015fenmesi, elektronik bile\u015fenlerin tak\u0131lmas\u0131 ve ard\u0131ndan yerlerine lehimlenmesi ile elde edilir. \u0130yi ba\u011flant\u0131lar ve lehim ba\u011flant\u0131lar\u0131n\u0131n g\u00fcc\u00fc devre kartlar\u0131n\u0131n normal \u00e7al\u0131\u015fmas\u0131 i\u00e7in kritik \u00f6neme sahiptir.<\/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-solder-joint-1.jpg\" alt=\"PCB lehim ba\u011flant\u0131s\u0131\" class=\"wp-image-3690\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-1-18x12.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\">\u0130\u00e7indekiler<\/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\/tr\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#1_Design_Purposes_of_Unfilled_Solder_Joints\" >1. Dolgusuz Lehim Ba\u011flant\u0131lar\u0131n\u0131n Tasar\u0131m Ama\u00e7lar\u0131<\/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\/tr\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#2_Electrical_Performance_Impact_Mechanisms\" >2. Elektriksel Performans Etki Mekanizmalar\u0131<\/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\/tr\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#3_Solder_Joint_Quality_Inspection_Techniques\" >3. Lehim Eklemi Kalite Kontrol Teknikleri<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/tr\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#4_Key_Process_Control_Parameters\" >4. Temel S\u00fcre\u00e7 Kontrol Parametreleri<\/a><\/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\/tr\/blog\/what-is-the-purpose-of-unfilled-solder-pads-on-a-pcb\/#Common_Issues_Solutions\" >Yayg\u0131n Sorunlar ve \u00c7\u00f6z\u00fcmler<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Design_Purposes_of_Unfilled_Solder_Joints\"><\/span>1. Dolgusuz Lehim Ba\u011flant\u0131lar\u0131n\u0131n Tasar\u0131m Ama\u00e7lar\u0131<span class=\"ez-toc-section-end\"><\/span><\/h2><ul class=\"wp-block-list\"><li><strong>Test Noktas\u0131 \u0130\u015flevselli\u011fi<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>Elektriksel Test: A\u00e7\u0131kta kalan bak\u0131r alanlar osiloskoplar, u\u00e7an prob test cihazlar\u0131 ve di\u011fer benzer cihazlar i\u00e7in test noktalar\u0131 g\u00f6revi g\u00f6r\u00fcr.<\/li>\n\n<li>S\u00fcre\u00e7 Do\u011frulamas\u0131: Yeniden ak\u0131\u015f \/ dalga lehimleme sonras\u0131, test noktalar\u0131 proses parametrelerini do\u011frular.<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>\u00d6zel Tasar\u0131m Gereklilikleri<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>Is\u0131 Yay\u0131l\u0131m\u0131: Y\u00fcksek ak\u0131m hatlar\u0131nda a\u00e7\u0131kta kalan bak\u0131r termal performans\u0131 art\u0131r\u0131r (ak\u0131m ta\u015f\u0131ma kapasitesi hesaplamalar\u0131 gerektirir).<\/li>\n\n<li>RF Hata Ay\u0131klama: Y\u00fcksek frekansl\u0131 devreler i\u00e7in maskesiz empedans test noktalar\u0131 (alt\u0131n kaplama \u00f6nerilir).<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Electrical_Performance_Impact_Mechanisms\"><\/span>2. Elektriksel Performans Etki Mekanizmalar\u0131<span class=\"ez-toc-section-end\"><\/span><\/h2><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Etki Boyutu<\/th><th>Mekanizma<\/th><th>Tipik Senaryo<\/th><\/tr><\/thead><tbody><tr><td>Temas Direnci<\/td><td>Oksit katmanlar empedans\u0131 3-5 kat art\u0131r\u0131r<\/td><td>G\u00fc\u00e7 devrelerinde a\u015f\u0131r\u0131 voltaj d\u00fc\u015f\u00fc\u015f\u00fc<\/td><\/tr><tr><td>Y\u00fcksek Frekansl\u0131 Sinyal Kayb\u0131<\/td><td>Empedans uyumsuzluklar\u0131 geri d\u00f6n\u00fc\u015f kayb\u0131na neden olur (&gt;3dB)<\/td><td>5G mod\u00fcllerinde artan bit hata oranlar\u0131<\/td><\/tr><tr><td>Termal G\u00fcvenilirlik<\/td><td>Daha y\u00fcksek termal diren\u00e7 ba\u011flant\u0131 s\u0131cakl\u0131klar\u0131n\u0131 10-15\u00b0C y\u00fckseltir<\/td><td>G\u00fc\u00e7 MOSFET'lerinde erken ar\u0131za<\/td><\/tr><\/tbody><\/table><\/figure><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-solder-joint-3.jpg\" alt=\"PCB lehim ba\u011flant\u0131s\u0131\" class=\"wp-image-3691\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-3.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-3-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-3-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Solder_Joint_Quality_Inspection_Techniques\"><\/span>3. Lehim Eklemi Kalite Kontrol Teknikleri<span class=\"ez-toc-section-end\"><\/span><\/h2><ul class=\"wp-block-list\"><li><strong>End\u00fcstriyel S\u0131n\u0131f \u00c7\u00f6z\u00fcmler<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>3D SPI: Lehim pastas\u0131 kal\u0131nl\u0131\u011f\u0131 \u00f6l\u00e7\u00fcm\u00fc (\u00b15\u03bcm hassasiyet)<\/li>\n\n<li>Mikrofokus X-ray: 0,2\u03bcm seviyesindeki BGA bo\u015fluklar\u0131n\u0131 alg\u0131lar (99,7% alg\u0131lama oran\u0131)<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Uygun Maliyetli \u00c7\u00f6z\u00fcmler<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>K\u0131rm\u0131z\u0131 Boya Penetrasyonu: D\u00fc\u015f\u00fck maliyetli \u00e7atlak tespiti (80% tasarruf)<\/li>\n\n<li>Termal G\u00f6r\u00fcnt\u00fcleme: S\u0131cakl\u0131k anomalileri yoluyla so\u011fuk ba\u011flant\u0131lar\u0131 belirler<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Key_Process_Control_Parameters\"><\/span>4. Temel S\u00fcre\u00e7 Kontrol Parametreleri<span class=\"ez-toc-section-end\"><\/span><\/h2><p><strong>Reflow Lehimleme Profili (Kur\u015funsuz Proses \u00d6rne\u011fi)<\/strong><\/p><ul class=\"wp-block-list\"><li>\u00d6n \u0131s\u0131tma: 150\u00b0C (1-2\u00b0C\/s rampa h\u0131z\u0131)<\/li>\n\n<li>Islatma S\u00fcresi: 90 sn (\u00b15\u00b0C stabilizasyon)<\/li>\n\n<li>En Y\u00fcksek S\u0131cakl\u0131k: 245\u00b0C (30-45 sn s\u00fcre)<\/li>\n\n<li>So\u011futma H\u0131z\u0131: 3\u00b0C\/s (termal \u015foku \u00f6nler)<\/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-solder-joint-2.jpg\" alt=\"PCB lehim ba\u011flant\u0131s\u0131\" class=\"wp-image-3692\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-solder-joint-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Issues_Solutions\"><\/span>Yayg\u0131n Sorunlar ve \u00c7\u00f6z\u00fcmler<span class=\"ez-toc-section-end\"><\/span><\/h2><p><strong>S1: Y\u00fcksek frekansl\u0131 devrelerde sinyal b\u00fct\u00fcnl\u00fc\u011f\u00fc sorunlar\u0131 - dolgusuz lehim ba\u011flant\u0131lar\u0131ndan m\u0131 \u015f\u00fcpheleniliyor?<\/strong><br>A1: Empedans s\u00fcreksizliklerinin yerini belirlemek i\u00e7in Zaman Tan\u0131ml\u0131 Reflektometri (TDR) kullan\u0131n, ard\u0131ndan X-ray ile do\u011frulay\u0131n. \u00d6neriler:<\/p><ul class=\"wp-block-list\"><li>D\u00fc\u015f\u00fck kay\u0131pl\u0131 lehim ala\u015f\u0131mlar\u0131 kullan\u0131n (\u00f6rn. SnAgCu)<\/li>\n\n<li>Empedans kompanzasyonlu test noktalar\u0131 tasarlay\u0131n<\/li><\/ul><p><strong>S2: Seri \u00fcretimde so\u011fuk lehim ba\u011flant\u0131lar\u0131 nas\u0131l h\u0131zl\u0131 bir \u015fekilde ele al\u0131n\u0131r?<\/strong><br>A2: \u00dc\u00e7 a\u015famal\u0131 bir kontrol y\u00f6ntemi uygulay\u0131n:<\/p><ol class=\"wp-block-list\"><li>\u015eablon optimizasyonu: A\u00e7\u0131kl\u0131k boyutunu 5% kadar art\u0131r\u0131n<\/li>\n\n<li>Azot atmosferi: O\u2082 seviyelerini &lt;1000ppm olarak koruyun<\/li>\n\n<li>Inline AOI: Yandan g\u00f6r\u00fcn\u00fcm denetimi ekleyin<\/li><\/ol><p><strong>S3: Nemli ortamlarda maruz kalan bak\u0131r oksidasyonu, zay\u0131f temasa neden oluyor mu?<\/strong><br>A3: \u00dc\u00e7 kademeli koruma stratejisi:<\/p><ul class=\"wp-block-list\"><li>Birincil: Ak\u0131ms\u0131z Nikel Dald\u0131rma Alt\u0131n (ENIG)<\/li>\n\n<li>\u0130kincil: Yerel konformal kaplama (UV ile k\u00fcrlenebilen re\u00e7ine)<\/li>\n\n<li>\u00dc\u00e7\u00fcnc\u00fcl: IP67 s\u0131n\u0131f\u0131 su ge\u00e7irmez tasar\u0131m<\/li><\/ul><p><\/p>","protected":false},"excerpt":{"rendered":"<p>Test noktas\u0131 i\u015flevleri, sinyal b\u00fct\u00fcnl\u00fc\u011f\u00fc riskleri ve X-ray denetim teknolojisi gibi temel bilgi noktalar\u0131n\u0131 kapsayan PCB'lerdeki doldurulmam\u0131\u015f lehim pedlerinin (a\u00e7\u0131kta kalan bak\u0131r alanlar) tasar\u0131m ama\u00e7lar\u0131, elektrik performans\u0131 etkileri ve denetim y\u00f6ntemleri, IPC-610 gibi end\u00fcstri standartlar\u0131na uygundur ve PCB tasar\u0131m\u0131 ve \u00fcretim s\u00fcre\u00e7leri i\u00e7in yard\u0131m sa\u011flar.<\/p>","protected":false},"author":1,"featured_media":3693,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[109],"tags":[331],"class_list":["post-3689","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq","tag-pcb-solder-joint"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is the purpose of unfilled solder pads on a PCB? 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