{"id":25856,"date":"2026-11-09T19:06:25","date_gmt":"2026-11-09T16:06:25","guid":{"rendered":"https:\/\/elektroent.com\/?p=25856"},"modified":"2026-11-09T19:06:28","modified_gmt":"2026-11-09T16:06:28","slug":"elektronik-kartlarda-lehim-hatalari-nedenleri-tespit-yontemleri-ve-cozumleri","status":"publish","type":"post","link":"https:\/\/elektroent.com\/en\/elektronik-kartlarda-lehim-hatalari-nedenleri-tespit-yontemleri-ve-cozumleri\/","title":{"rendered":"Elektronik Kartlarda Lehim Hatalar\u0131: Nedenleri, Tespit Y\u00f6ntemleri ve \u00c7\u00f6z\u00fcmleri"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Elektronik kart \u00fcretiminde lehimleme, komponentlerin PCB \u00fczerindeki pedlere hem elektriksel hem de mekanik olarak ba\u011flanmas\u0131n\u0131 sa\u011flar. Bu ba\u011flant\u0131da olu\u015fan k\u00fc\u00e7\u00fck bir kusur bile \u00fcr\u00fcn\u00fcn hi\u00e7 \u00e7al\u0131\u015fmamas\u0131na, aral\u0131kl\u0131 ar\u0131zalara veya sahada k\u0131sa s\u00fcrede hata vermesine neden olabilir. Bu y\u00fczden lehim hatalar\u0131; prototip a\u015famas\u0131ndan seri \u00fcretime kadar tasar\u0131m, dizgi ve kalite kontrol ekiplerinin yak\u0131ndan takip etti\u011fi konular\u0131n ba\u015f\u0131nda gelir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lehim hatalar\u0131 yaln\u0131zca \u00fcretim hatt\u0131ndaki uygulamadan kaynaklanmaz. PCB tasar\u0131m\u0131, stencil a\u00e7\u0131kl\u0131klar\u0131, kullan\u0131lan lehim pastas\u0131, komponentlerin saklama ko\u015fullar\u0131, reflow profili ve montaj sonras\u0131 test s\u00fcreci birbirini do\u011frudan etkiler. Hatan\u0131n kayna\u011f\u0131n\u0131 do\u011fru belirlemek, tekrar eden kalite sorunlar\u0131n\u0131 azaltman\u0131n en h\u0131zl\u0131 yoludur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu rehberde elektronik kartlarda s\u0131k g\u00f6r\u00fclen lehim hatalar\u0131n\u0131, nedenlerini, nas\u0131l tespit edilebileceklerini ve \u00f6nleyici \u00e7\u00f6z\u00fcmleri ele al\u0131yoruz.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Lehim Hatas\u0131 Nedir?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Lehim hatas\u0131; bir elektronik komponentin PCB \u00fczerindeki ba\u011flant\u0131s\u0131n\u0131n istenen elektriksel veya mekanik kaliteyi sa\u011flamamas\u0131 durumudur. Sa\u011fl\u0131kl\u0131 bir lehim ba\u011flant\u0131s\u0131, komponent baca\u011f\u0131 veya terminali ile karttaki bak\u0131r ped aras\u0131nda d\u00fczg\u00fcn bi\u00e7imde yay\u0131lm\u0131\u015f, yeterli miktarda lehim bulunan ve g\u00fcvenilir iletkenlik sa\u011flayan bir yap\u0131ya sahip olmal\u0131d\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hatal\u0131 lehim ba\u011flant\u0131lar\u0131 ilk kontrolde fark edilmeyebilir. Kart ilk \u00e7al\u0131\u015ft\u0131rmada do\u011fru davran\u0131rken, s\u0131cakl\u0131k de\u011fi\u015fimi, titre\u015fim, nem veya uzun s\u00fcreli kullan\u0131m sonras\u0131nda ba\u011flant\u0131 kopabilir. \u00d6zellikle end\u00fcstriyel cihazlar, otomotiv elektroni\u011fi, IoT \u00fcr\u00fcnleri ve y\u00fcksek titre\u015fimli ortamlarda kullan\u0131lan kartlar i\u00e7in lehim kalitesi \u00fcr\u00fcn \u00f6mr\u00fcn\u00fc do\u011frudan etkiler.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Elektronik Kartlarda En S\u0131k G\u00f6r\u00fclen Lehim Hatalar\u0131<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">So\u011fuk Lehim<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">So\u011fuk lehim, lehimin yeterli s\u0131cakl\u0131\u011fa ula\u015fmamas\u0131 veya lehimleme s\u0131ras\u0131nda ba\u011flant\u0131n\u0131n hareket etmesi nedeniyle olu\u015fur. Lehim y\u00fczeyi mat, p\u00fcr\u00fczl\u00fc veya d\u00fczensiz g\u00f6r\u00fcnebilir. Ba\u011flant\u0131 ilk etapta elektriksel olarak \u00e7al\u0131\u015fsa bile mekanik dayan\u0131m\u0131 d\u00fc\u015f\u00fckt\u00fcr.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu hata genellikle yanl\u0131\u015f reflow s\u0131cakl\u0131\u011f\u0131, yetersiz havya s\u0131cakl\u0131\u011f\u0131, oksitlenmi\u015f pedler veya \u00fcretim s\u0131ras\u0131nda kart\u0131n hareket etmesi nedeniyle ortaya \u00e7\u0131kar. So\u011fuk lehim, \u00f6zellikle aral\u0131kl\u0131 ba\u011flant\u0131 sorunlar\u0131na yol a\u00e7t\u0131\u011f\u0131 i\u00e7in tespiti zor hatalardan biridir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c7\u00f6z\u00fcm i\u00e7in lehimleme profilinin g\u00f6zden ge\u00e7irilmesi, ped ve komponent y\u00fczeylerinin temiz tutulmas\u0131 ve uygun lehimleme s\u0131cakl\u0131\u011f\u0131n\u0131n kullan\u0131lmas\u0131 gerekir. Manuel lehimleme yap\u0131lan i\u015flemlerde operat\u00f6r e\u011fitimi ve s\u00fcre\u00e7 standardizasyonu da \u00f6nemlidir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Lehim K\u00f6pr\u00fcs\u00fc<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Lehim k\u00f6pr\u00fcs\u00fc, birbirine yak\u0131n iki ped veya komponent ucu aras\u0131nda istenmeyen lehim ba\u011flant\u0131s\u0131 olu\u015fmas\u0131d\u0131r. Bu durum k\u0131sa devreye neden olabilir. \u0130nce bacak aral\u0131\u011f\u0131na sahip entegrelerde, QFN, QFP ve BGA gibi paketlerde daha s\u0131k g\u00f6r\u00fcl\u00fcr.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lehim k\u00f6pr\u00fclerinin yayg\u0131n nedenleri aras\u0131nda fazla lehim pastas\u0131 kullan\u0131m\u0131, yanl\u0131\u015f stencil tasar\u0131m\u0131, komponentin hatal\u0131 hizalanmas\u0131 ve reflow s\u0131ras\u0131nda lehimin kontrols\u00fcz yay\u0131lmas\u0131 bulunur. \u00d6zellikle y\u00fcksek yo\u011funluklu PCB tasar\u0131mlar\u0131nda ped aral\u0131klar\u0131 darald\u0131k\u00e7a bu risk artar.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">AOI sistemleri, lehim k\u00f6pr\u00fclerinin tespitinde etkili bir y\u00f6ntemdir. Hatan\u0131n tekrar\u0131n\u0131 \u00f6nlemek i\u00e7in stencil a\u00e7\u0131kl\u0131klar\u0131, lehim pastas\u0131 hacmi, PCB ped tasar\u0131m\u0131 ve dizgi makinesinin yerle\u015ftirme hassasiyeti birlikte de\u011ferlendirilmelidir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Yetersiz Lehim<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yetersiz lehim, ba\u011flant\u0131 noktas\u0131nda gereken miktarda lehim bulunmamas\u0131d\u0131r. Komponentin ped ile temas\u0131 zay\u0131f kalabilir ve mekanik dayan\u0131kl\u0131l\u0131k d\u00fc\u015fer. Bu hata \u00f6zellikle titre\u015fim, darbe veya \u0131s\u0131l d\u00f6ng\u00fclerin bulundu\u011fu kullan\u0131m ko\u015fullar\u0131nda ilerleyen d\u00f6nemde kopmalara yol a\u00e7abilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yetersiz lehimin ba\u015fl\u0131ca nedenleri; stencil a\u00e7\u0131kl\u0131\u011f\u0131n\u0131n k\u00fc\u00e7\u00fck olmas\u0131, lehim pastas\u0131n\u0131n kurumas\u0131, bask\u0131 parametrelerinin hatal\u0131 ayarlanmas\u0131 veya ped y\u00fczeyindeki oksitlenmedir. Komponentin tam oturmamas\u0131 da lehimin do\u011fru \u015fekilde yay\u0131lmas\u0131n\u0131 engelleyebilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu sorunu azaltmak i\u00e7in lehim pastas\u0131 bask\u0131 kalitesi d\u00fczenli kontrol edilmeli, stencil temizli\u011fi ihmal edilmemeli ve reflow \u00f6ncesi komponent yerle\u015fimi do\u011frulanmal\u0131d\u0131r. Kritik ba\u011flant\u0131larda X-ray veya kesit analizi gibi daha detayl\u0131 kontroller gerekebilir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fazla Lehim<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Fazla lehim, ba\u011flant\u0131 b\u00f6lgesinde gere\u011finden \u00e7ok lehim birikmesiyle olu\u015fur. Her fazla lehim miktar\u0131 do\u011frudan ar\u0131za anlam\u0131na gelmese de k\u00f6pr\u00fc olu\u015fumu, komponentin do\u011fru oturmamas\u0131 ve g\u00f6rsel kalite sorunlar\u0131 yaratabilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fazla lehimin s\u0131k g\u00f6r\u00fclen nedenleri aras\u0131nda geni\u015f stencil a\u00e7\u0131kl\u0131klar\u0131, y\u00fcksek lehim pastas\u0131 hacmi ve manuel lehimleme s\u0131ras\u0131nda kontrols\u00fcz lehim teli kullan\u0131m\u0131 vard\u0131r. Through-hole komponentlerde fazla lehim, delik \u00e7evresindeki ba\u011flant\u0131n\u0131n g\u00f6r\u00fcn\u00fcm\u00fcn\u00fc bozabilir ve ince hatlara ta\u015fma riski olu\u015fturabilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c7\u00f6z\u00fcm i\u00e7in stencil tasar\u0131m\u0131 g\u00f6zden ge\u00e7irilmeli, bask\u0131 bas\u0131nc\u0131 ve s\u0131y\u0131r\u0131c\u0131 h\u0131z\u0131 do\u011fru ayarlanmal\u0131, manuel \u00fcretimde ise lehim miktar\u0131 standart hale getirilmelidir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Tombstoning<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tombstoning, k\u00fc\u00e7\u00fck SMD komponentlerin bir ucunun PCB y\u00fczeyinden kalkarak dik konuma gelmesidir. Bu hata en s\u0131k diren\u00e7 ve kondansat\u00f6r gibi iki u\u00e7lu chip komponentlerde g\u00f6r\u00fcl\u00fcr. Komponentin yaln\u0131zca bir ucu lehimlendi\u011fi i\u00e7in devre a\u00e7\u0131k kal\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tombstoning genellikle iki peddeki \u0131s\u0131 da\u011f\u0131l\u0131m\u0131n\u0131n e\u015fit olmamas\u0131ndan kaynaklan\u0131r. Ped boyutlar\u0131n\u0131n farkl\u0131 olmas\u0131, bir ucun geni\u015f bak\u0131r alana ba\u011flanmas\u0131, komponentin hatal\u0131 yerle\u015ftirilmesi veya reflow profilindeki dengesizlik bu durumu tetikleyebilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00d6nleme i\u00e7in simetrik ped tasar\u0131m\u0131 yap\u0131lmal\u0131, komponent yerle\u015fimi do\u011fru konumland\u0131r\u0131lmal\u0131 ve reflow profili dengeli \u015fekilde ayarlanmal\u0131d\u0131r. PCB tasar\u0131m a\u015famas\u0131nda termal denge dikkate al\u0131n\u0131rsa bu hata \u00f6nemli \u00f6l\u00e7\u00fcde azalt\u0131labilir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">A\u00e7\u0131k Devre ve Kopuk Ba\u011flant\u0131<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A\u00e7\u0131k devre, komponent terminali ile PCB pedi aras\u0131nda elektriksel ba\u011flant\u0131 olmamas\u0131d\u0131r. Bu hata, lehim pastas\u0131n\u0131n eksik bas\u0131lmas\u0131, komponentin yanl\u0131\u015f yerle\u015ftirilmesi, pedin zarar g\u00f6rmesi veya lehimin y\u00fczeye tutunmamas\u0131 nedeniyle olu\u015fabilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A\u00e7\u0131k devre hatalar\u0131 fonksiyonel test s\u0131ras\u0131nda ortaya \u00e7\u0131kabilir. Ancak t\u00fcm ba\u011flant\u0131lar\u0131n tek tek kontrol edilmesi gereken kartlarda yaln\u0131zca fonksiyonel test yeterli olmayabilir. AOI, ICT ve g\u00f6rsel kontrol y\u00f6ntemleri birlikte kullan\u0131ld\u0131\u011f\u0131nda hata yakalama oran\u0131 y\u00fckselir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hatan\u0131n kayna\u011f\u0131 belirlendikten sonra yaln\u0131zca ar\u0131zal\u0131 kart\u0131n onar\u0131lmas\u0131 yerine, ayn\u0131 partiye ait di\u011fer kartlar\u0131n da incelenmesi gerekir. \u00c7\u00fcnk\u00fc a\u00e7\u0131k devre sorunu \u00e7o\u011fu zaman bask\u0131, yerle\u015ftirme veya reflow s\u00fcrecindeki sistematik bir sorunun g\u00f6stergesidir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Lehim Toplar\u0131 ve S\u0131\u00e7ramalar<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Lehim toplar\u0131, reflow i\u015flemi sonras\u0131nda PCB y\u00fczeyinde k\u00fc\u00e7\u00fck lehim par\u00e7ac\u0131klar\u0131n\u0131n kalmas\u0131d\u0131r. Bu par\u00e7ac\u0131klar zaman i\u00e7inde yer de\u011fi\u015ftirerek k\u0131sa devre riskine yol a\u00e7abilir. \u00d6zellikle ince hat aral\u0131klar\u0131n\u0131n bulundu\u011fu yo\u011fun tasar\u0131mlarda dikkatle ele al\u0131nmal\u0131d\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu hata; lehim pastas\u0131n\u0131n fazla kullan\u0131lmas\u0131, pastan\u0131n yanl\u0131\u015f saklanmas\u0131, nem almas\u0131 veya reflow profilindeki ani s\u0131cakl\u0131k de\u011fi\u015fimleri nedeniyle olu\u015fabilir. Stencil temizli\u011fi yetersiz oldu\u011funda da bask\u0131 alan\u0131 d\u0131\u015f\u0131nda lehim pastas\u0131 kal\u0131nt\u0131lar\u0131 olu\u015fabilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lehim toplar\u0131n\u0131 azaltmak i\u00e7in lehim pastas\u0131n\u0131n saklama ko\u015fullar\u0131 takip edilmeli, bask\u0131 parametreleri do\u011frulanmal\u0131 ve reflow e\u011frisi kontroll\u00fc bi\u00e7imde olu\u015fturulmal\u0131d\u0131r. \u00dcretim sonras\u0131 AOI kontrol\u00fc, kalan lehim toplar\u0131n\u0131n tespit edilmesine yard\u0131mc\u0131 olur.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Lehim Hatalar\u0131 Neden Olu\u015fur?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Lehim hatalar\u0131n\u0131n en \u00f6nemli nedenlerinden biri PCB tasar\u0131m\u0131d\u0131r. Ped boyutlar\u0131, pedler aras\u0131 mesafe, termal pad kullan\u0131m\u0131, bak\u0131r alanlar\u0131n\u0131n da\u011f\u0131l\u0131m\u0131 ve komponent yerle\u015fimi lehimleme kalitesini do\u011frudan etkiler. \u00dcretim i\u00e7in tasar\u0131m kurallar\u0131, yani DFM kontrolleri, seri \u00fcretime ge\u00e7meden \u00f6nce uygulanmal\u0131d\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lehim pastas\u0131 da kritik bir etkendir. Pastan\u0131n son kullanma tarihi, saklama s\u0131cakl\u0131\u011f\u0131, oda s\u0131cakl\u0131\u011f\u0131nda bekleme s\u00fcresi ve kar\u0131\u015ft\u0131rma ko\u015fullar\u0131 \u00fcretim sonucunu de\u011fi\u015ftirir. Uygun ko\u015fullarda saklanmayan lehim pastas\u0131 yeterli ak\u0131\u015fkanl\u0131\u011f\u0131 g\u00f6stermez ve y\u00fczeye do\u011fru \u015fekilde yay\u0131lmaz.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Stencil tasar\u0131m\u0131 ve bask\u0131 i\u015flemi de hatalar\u0131n \u00f6nemli kaynaklar\u0131 aras\u0131ndad\u0131r. \u00c7ok b\u00fcy\u00fck a\u00e7\u0131kl\u0131klar fazla lehim kullan\u0131m\u0131na, k\u00fc\u00e7\u00fck a\u00e7\u0131kl\u0131klar ise yetersiz lehime neden olabilir. Stencil alt\u0131ndaki kal\u0131nt\u0131lar temizlenmedi\u011finde bir sonraki bask\u0131da lehim pastas\u0131 da\u011f\u0131l\u0131m\u0131 bozulur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Reflow f\u0131r\u0131n\u0131 s\u0131cakl\u0131k profili, komponent ve PCB \u00fcreticisinin \u00f6nerdi\u011fi s\u0131n\u0131rlar i\u00e7inde olmal\u0131d\u0131r. \u00c7ok d\u00fc\u015f\u00fck s\u0131cakl\u0131k so\u011fuk lehime, \u00e7ok y\u00fcksek s\u0131cakl\u0131k ise komponent hasar\u0131na, PCB deformasyonuna veya lehim toplar\u0131na neden olabilir. Her yeni kart tasar\u0131m\u0131 ve komponent kombinasyonu i\u00e7in reflow profili do\u011frulanmal\u0131d\u0131r.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Lehim Hatalar\u0131 Nas\u0131l Tespit Edilir?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">G\u00f6rsel kontrol, lehim hatalar\u0131n\u0131n tespitinde ilk ad\u0131md\u0131r. Operat\u00f6r veya kalite kontrol uzman\u0131; eksik lehim, lehim k\u00f6pr\u00fcs\u00fc, e\u011fik komponent, ta\u015fm\u0131\u015f lehim ve y\u00fczey kusurlar\u0131 gibi belirgin sorunlar\u0131 inceleyebilir. Ancak \u00e7ok say\u0131da ba\u011flant\u0131 i\u00e7eren kartlarda yaln\u0131zca insan g\u00f6z\u00fcne dayal\u0131 kontrol yeterli olmayabilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">AOI, yani otomatik optik inceleme, kameralar ve g\u00f6r\u00fcnt\u00fc i\u015fleme sistemleri kullanarak PCB \u00fczerindeki lehim noktalar\u0131n\u0131 otomatik olarak kontrol eder. AOI; komponent y\u00f6n\u00fc, eksik komponent, lehim k\u00f6pr\u00fcs\u00fc, yetersiz lehim ve yerle\u015fim hatalar\u0131n\u0131n tespitinde yayg\u0131n olarak kullan\u0131l\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">X-ray inceleme, \u00f6zellikle BGA, QFN ve alt ba\u011flant\u0131lar\u0131 g\u00f6r\u00fcnmeyen komponentlerde kullan\u0131l\u0131r. Bu y\u00f6ntem sayesinde lehim toplar\u0131, bo\u015fluklar, k\u00f6pr\u00fcler ve hizalama sorunlar\u0131 kart s\u00f6k\u00fclmeden incelenebilir. Y\u00fcksek yo\u011funluklu ve kritik kartlarda X-ray kontrol\u00fc kalite g\u00fcvence s\u00fcrecinin \u00f6nemli par\u00e7as\u0131d\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ICT testi, kart \u00fczerindeki elektriksel noktalar\u0131 \u00f6l\u00e7erek a\u00e7\u0131k devre, k\u0131sa devre ve yanl\u0131\u015f komponent de\u011ferleri gibi hatalar\u0131 bulmaya yard\u0131mc\u0131 olur. Fonksiyonel test ise kart\u0131n ger\u00e7ek \u00e7al\u0131\u015fma ko\u015fullar\u0131ndaki davran\u0131\u015f\u0131n\u0131 kontrol eder. En y\u00fcksek kalite seviyesi i\u00e7in optik, elektriksel ve fonksiyonel testler birbirini tamamlayacak \u015fekilde planlanmal\u0131d\u0131r.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Lehim Hatalar\u0131n\u0131 \u00d6nlemek \u0130\u00e7in Neler Yap\u0131lmal\u0131?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u00dcretim \u00f6ncesinde PCB tasar\u0131m\u0131 DFM a\u00e7\u0131s\u0131ndan incelenmelidir. Ped yap\u0131lar\u0131, komponent aral\u0131klar\u0131, termal alanlar ve stencil a\u00e7\u0131kl\u0131klar\u0131 \u00fcreticiyle birlikte de\u011ferlendirilmelidir. Bu \u00e7al\u0131\u015fma, \u00fcretim a\u015famas\u0131nda ortaya \u00e7\u0131kabilecek bir\u00e7ok lehim hatas\u0131n\u0131 daha ba\u015flamadan \u00f6nler.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Komponentlerin ve PCB\u2019lerin do\u011fru ko\u015fullarda saklanmas\u0131 gerekir. Nem alan komponentler, reflow s\u0131ras\u0131nda hasar g\u00f6rebilir veya lehimleme kalitesini d\u00fc\u015f\u00fcrebilir. Nem hassasiyet seviyesi bulunan komponentler i\u00e7in \u00fcretici \u00f6nerilerine uygun saklama ve kurutma s\u00fcre\u00e7leri uygulanmal\u0131d\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lehim pastas\u0131 bask\u0131s\u0131 d\u00fczenli olarak kontrol edilmelidir. SPI, yani lehim pastas\u0131 inceleme sistemleri, bask\u0131 y\u00fcksekli\u011fi ve hacmini \u00f6l\u00e7erek reflow \u00f6ncesinde olas\u0131 sorunlar\u0131 tespit edebilir. B\u00f6ylece hatal\u0131 bask\u0131 yap\u0131lm\u0131\u015f kartlar f\u0131r\u0131na girmeden ayr\u0131labilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00dcretim parametreleri kay\u0131t alt\u0131na al\u0131nmal\u0131 ve tekrar eden hatalarda geriye d\u00f6n\u00fck inceleme yap\u0131lmal\u0131d\u0131r. Hangi \u00fcr\u00fcn partisinde, hangi stencil ile, hangi lehim pastas\u0131yla ve hangi reflow profiliyle \u00fcretim yap\u0131ld\u0131\u011f\u0131 takip edildi\u011finde k\u00f6k neden analizi \u00e7ok daha h\u0131zl\u0131 yap\u0131labilir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Lehim hatalar\u0131, elektronik kartlar\u0131n performans\u0131n\u0131, dayan\u0131kl\u0131l\u0131\u011f\u0131n\u0131 ve \u00fcr\u00fcn g\u00fcvenilirli\u011fini do\u011frudan etkiler. So\u011fuk lehim, lehim k\u00f6pr\u00fcs\u00fc, yetersiz lehim, tombstoning ve a\u00e7\u0131k devre gibi sorunlar; do\u011fru PCB tasar\u0131m\u0131, kontroll\u00fc \u00fcretim parametreleri ve etkili kalite kontrol y\u00f6ntemleriyle b\u00fcy\u00fck \u00f6l\u00e7\u00fcde \u00f6nlenebilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kaliteli bir elektronik kart \u00fcretimi i\u00e7in yaln\u0131zca komponentlerin do\u011fru se\u00e7ilmesi yeterli de\u011fildir. PCB tasar\u0131m\u0131, komponent tedari\u011fi, stencil bask\u0131s\u0131, SMD dizgi, reflow s\u00fcreci ve test ad\u0131mlar\u0131 bir b\u00fct\u00fcn olarak y\u00f6netilmelidir. Elektroent, elektronik kart dizgi ve \u00fcretim s\u00fcre\u00e7lerinde do\u011fru \u00fcretim altyap\u0131s\u0131 ve kalite kontrol ad\u0131mlar\u0131yla projelerin daha g\u00fcvenilir \u015fekilde hayata ge\u00e7irilmesine destek olur.<\/p>","protected":false},"excerpt":{"rendered":"<p>Elektronik kart \u00fcretiminde lehimleme, komponentlerin PCB \u00fczerindeki pedlere hem elektriksel hem de mekanik olarak ba\u011flanmas\u0131n\u0131 sa\u011flar. <\/p>","protected":false},"author":4,"featured_media":25857,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[112,1],"tags":[177],"class_list":["post-25856","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-yazilarimiz-tr","category-genel","tag-lehim"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Elektronik Kartlarda Lehim Hatalar\u0131: Nedenleri, Tespit Y\u00f6ntemleri ve \u00c7\u00f6z\u00fcmleri - ElektroEnt<\/title>\n<meta name=\"description\" content=\"Elektronik kartlarda lehim hatalar\u0131 nelerdir? 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