{"id":5762,"date":"2026-03-03T07:36:09","date_gmt":"2026-03-03T07:36:09","guid":{"rendered":"https:\/\/pickandplacemachine.com\/?p=5762"},"modified":"2026-05-20T01:42:06","modified_gmt":"2026-05-20T01:42:06","slug":"shadowing-effects-understanding-bga-solder-depletion-issues","status":"publish","type":"post","link":"https:\/\/pickandplacemachine.com\/tr\/shadowing-effects-understanding-bga-solder-depletion-issues\/","title":{"rendered":"G\u00f6lgeleme Etkileri: Bga Lehim T\u00fckenmesi Sorunlar\u0131n\u0131 Anlamak"},"content":{"rendered":"<p class=\"wp-block-paragraph\">\u00dc\u00e7 kelime.&nbsp;<strong>So\u011fuk. A\u00e7l\u0131ktan. \u00d6l\u00fc.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u015eimdi i\u015fin \u00e7irkin k\u0131sm\u0131: As\u0131l su\u00e7lu f\u0131r\u0131n re\u00e7etesinde dururken ak\u0131ll\u0131 ekiplerin iki hafta boyunca \u201ck\u00f6t\u00fc macun\u201d pe\u015finde ko\u015fmas\u0131n\u0131 izledim - panel boyunca 15-25\u00b0C s\u0131cakl\u0131k b\u00f6l\u00fcnmesi yaratan masum g\u00f6r\u00fcn\u00fcml\u00fc bir b\u00f6lge ayarlamas\u0131, bu nedenle bir BGA k\u00f6\u015fesi, g\u00fcnl\u00fckte \u201cprofil ge\u00e7ti\u201d yazmas\u0131na ra\u011fmen asla sabit bir \u0131slatma penceresine ula\u015fmad\u0131. Hangi k\u00f6\u015fe alan\u0131n\u0131n en \u00e7ok sevildi\u011fini tahmin etmek ister misiniz?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ve evet, neden&nbsp;<em>her zaman<\/em>&nbsp;\u201cher \u015feyin r\u00f6ntgenini \u00e7eken tek m\u00fc\u015fteride\u201d ortaya \u00e7\u0131kar m\u0131?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what-bga-solder-depletion-really-looks-like-on-a-real-line\">\u201cBGA lehim t\u00fckenmesi\u201d ger\u00e7ek bir hatta nas\u0131l g\u00f6r\u00fcn\u00fcr?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">BGA lehiminin t\u00fckenmesi, ba\u011flant\u0131n\u0131n \u015fu \u015fekilde sonlanmas\u0131 anlam\u0131na gelir&nbsp;<strong>i\u015flemin varsayd\u0131\u011f\u0131ndan daha az kullan\u0131labilir lehim<\/strong>, Bu nedenle bilye d\u00fczg\u00fcn bir \u015fekilde \u00e7\u00f6kemez, birle\u015femez ve t\u00fcm dizi boyunca pedi \u0131slatamaz. Bu her zaman temiz bir a\u00e7\u0131kl\u0131k de\u011fildir. Genellikle daha \u00e7irkin \u015feyler olur:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>termal d\u00f6ng\u00fcden sonra aral\u0131kl\u0131 a\u00e7\u0131lmalar<\/li>\n\n\n\n<li>ba\u015f yast\u0131kta fl\u00f6rt (ba\u011fl\u0131 g\u00f6r\u00fcn\u00fcyor, de\u011fil)<\/li>\n\n\n\n<li>kenar-top a\u00e7\u0131l\u0131r (\u00f6nce d\u0131\u015f s\u0131ra ba\u015far\u0131s\u0131z olur)<\/li>\n\n\n\n<li>dizi boyunca e\u015fit olmayan \u00e7\u00f6kme (bir taraf bat\u0131k, di\u011fer taraf \u201cy\u00fcksek\u201d)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0130nsanlar buna farkl\u0131 \u015feyler diyor-<strong>BGA lehim a\u00e7l\u0131\u011f\u0131<\/strong>,&nbsp;<strong>lehim bilyesi t\u00fckenmesi<\/strong>, \u201cYeniden ak\u0131tmadan sonra gizem a\u00e7\u0131l\u0131yor.\u201d Ayn\u0131 ac\u0131. Farkl\u0131 k\u00fcf\u00fcrler.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"shadowing-is-the-quiet-thief-and-it-doesn-t-care-about-your-sop-\">G\u00f6lge h\u0131rs\u0131z sessiz h\u0131rs\u0131zd\u0131r (ve SOP'nizi umursamaz)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">G\u00f6lgeleme \u015fu durumlarda ger\u00e7ekle\u015fir&nbsp;<strong>b\u00fcy\u00fck termal k\u00fctleler veya uzun par\u00e7alar \u0131s\u0131 transferini engeller<\/strong>&nbsp;B\u00f6ylece yerel bir b\u00f6lge montaj\u0131n geri kalan\u0131ndan daha yava\u015f \u0131s\u0131n\u0131r. Konveksiyonlu yeniden ak\u0131\u015fta IR'den daha az dramatiktir, ancak yine de so\u011fuk cepler olarak ortaya \u00e7\u0131kar - \u00f6zellikle kar\u0131\u015f\u0131k teknolojili panolarda: kalkanlar, konekt\u00f6rler, \u0131s\u0131 al\u0131c\u0131lar\u0131, kal\u0131n ind\u00fckt\u00f6rler, metal kutular, uzun elektrolitikler.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0130\u015fte pratikte g\u00f6lgelemenin ne i\u015fe yarad\u0131\u011f\u0131:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ak\u0131 etkinle\u015ftirme zamanlamas\u0131 gariple\u015fiyor (baz\u0131 macunlar etkinle\u015fiyor, baz\u0131lar\u0131 gecikiyor).<\/li>\n\n\n\n<li>U\u00e7ucu maddeler e\u015fit \u015fekilde kaynam\u0131yor (s\u0131\u00e7rama, \u00e7\u00f6kme veya macun \u201ckaymas\u0131\u201d).<\/li>\n\n\n\n<li>Islanma \u00f6nce s\u0131cak tarafta ba\u015flar ve so\u011fuk taraf ge\u00e7 gelir.<\/li>\n\n\n\n<li>BGA bilyeleri e\u015fit \u015fekilde \u00e7\u00f6kmez, bu nedenle en \u00e7ok ihtiya\u00e7 duydu\u011funuz yerde etkili lehimi \u201ckaybedersiniz\u201d.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Peki ya yeniden \u00e7al\u0131\u015f\u0131rsan\u0131z? Durumu daha da k\u00f6t\u00fcle\u015ftirebilirsiniz. Tekrarlanan yeniden ak\u0131tma \u00fczerine yap\u0131lan 2024 tarihli a\u00e7\u0131k eri\u015fimli bir \u00e7al\u0131\u015fma, BGA lehim bilyesi \u00e7\u00f6kme davran\u0131\u015f\u0131n\u0131n tekrarlanan yeniden ak\u0131tma d\u00f6ng\u00fcleri ile nas\u0131l de\u011fi\u015fti\u011fini g\u00f6stermektedir - \u00e7eviri: \u201csadece tekrar ak\u0131tma\u201d al\u0131\u015fkanl\u0131\u011f\u0131 \u00fccretsiz de\u011fildir. (<a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC11173930\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\">PMC<\/a>)<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/pickandplacemachine.com\/wp-admin\/post.php?post=1777&amp;action=edit\"><img decoding=\"async\" width=\"960\" height=\"640\" src=\"https:\/\/pickandplacemachine.com\/wp-content\/uploads\/2026\/03\/SMT-Consumables3.jpg\" alt=\"SMT Sarf Malzemeleri\" class=\"wp-image-5765\" srcset=\"https:\/\/pickandplacemachine.com\/wp-content\/uploads\/2026\/03\/SMT-Consumables3.jpg 960w, https:\/\/pickandplacemachine.com\/wp-content\/uploads\/2026\/03\/SMT-Consumables3-300x200.jpg 300w, https:\/\/pickandplacemachine.com\/wp-content\/uploads\/2026\/03\/SMT-Consumables3-768x512.jpg 768w, https:\/\/pickandplacemachine.com\/wp-content\/uploads\/2026\/03\/SMT-Consumables3-18x12.jpg 18w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"the-hard-truth-most-depletion-cases-are-stacked-failures\">Ac\u0131 ger\u00e7ek: \u201ct\u00fckenme\u201d davalar\u0131n\u0131n \u00e7o\u011fu ba\u015far\u0131s\u0131zl\u0131kla sonu\u00e7lan\u0131yor<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Neredeyse hi\u00e7bir zaman tek bir duman\u0131 t\u00fcten silah g\u00f6rmedim. Genelde bir y\u0131\u011f\u0131lma olur:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Bask\u0131 biraz zay\u0131f<\/strong>&nbsp;+&nbsp;<strong>g\u00f6lgeli b\u00f6lge hafif so\u011fuktur<\/strong>&nbsp;+&nbsp;<strong>tahta yeterince b\u00fck\u00fcl\u00fcr<\/strong>&nbsp;+&nbsp;<strong>inceleme BGA'n\u0131n alt\u0131na bakm\u0131yor<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yani eklem olu\u015fuyor... zar zor. G\u00f6nderilir. Sonra s\u0131cakl\u0131k sal\u0131n\u0131m\u0131, titre\u015fim veya zaman i\u015fi bitirir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu nedenle ekipleri BGA lehim t\u00fckenmesine bir&nbsp;<strong>sistem sorunu<\/strong>, \u201cmacun sorunu\u201d ya da \u201cf\u0131r\u0131n sorunu\u201d de\u011fil.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sistem g\u00f6r\u00fcn\u00fcm\u00fc istiyorsan\u0131z, hat tasar\u0131m\u0131 ve kontrol d\u00f6ng\u00fclerinin temelleri ile ba\u015flay\u0131n - \u00f6zellikle de hatlar in\u015fa ediyor veya \u00f6l\u00e7eklendiriyorsan\u0131z. Bu d\u00fc\u015f\u00fcnce tarz\u0131n\u0131&nbsp;<strong><a href=\"https:\/\/pickandplacemachine.com\/solution\/turnkey-smt-line-solutions\/\">Anahtar teslim SMT hatt\u0131 \u00e7\u00f6z\u00fcmleri<\/a><\/strong>&nbsp;\u00c7\u00fcnk\u00fc kusur tek bir makinede ya\u015famaz. Makineler aras\u0131ndaki bo\u015fluklarda ya\u015far.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"where-shadowing-sneaks-in-the-patterns-i-keep-seeing-\">G\u00f6lgelemenin gizlice girdi\u011fi yerler (g\u00f6rmeye devam etti\u011fim desenler)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-mixed-thermal-mass-boards-with-lazy-profiling\">1) Tembel profilli kar\u0131\u015f\u0131k termal k\u00fctle levhalar\u0131<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cTek pano, tek \u015ferit, panelin ortas\u0131\u201d \u015feklinde profilleme yaparak utan\u0131rs\u0131n\u0131z.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">G\u00f6lgeleme konumsald\u0131r. Hava ak\u0131\u015f\u0131n\u0131, konvey\u00f6r raylar\u0131n\u0131, panel kenar\u0131 etkilerini ve BGA'n\u0131n tam \u00e7evresini \u00f6nemser.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">E\u011fer ger\u00e7ek bir&nbsp;<strong><a href=\"https:\/\/pickandplacemachine.com\/reflow-thermal-profiler\/\">yeniden ak\u0131\u015f termal profilleyici<\/a><\/strong>&nbsp;\u00fczerine yerle\u015ftirilmi\u015f termokupllar ile&nbsp;<em>g\u00f6lgelenmi\u015f<\/em>&nbsp;BGA b\u00f6lgesinin yan taraf\u0131, tahmin ediyorsun.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-oven-recipes-optimized-for-throughput-not-wetting-margin\">2) Islatma marj\u0131 i\u00e7in de\u011fil, verim i\u00e7in optimize edilmi\u015f f\u0131r\u0131n re\u00e7eteleri<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Evet, daha h\u0131zl\u0131 ko\u015fabilirsiniz. Hay\u0131r, daha h\u0131zl\u0131 ko\u015famazs\u0131n&nbsp;<strong>ve<\/strong>&nbsp;Ba\u015fka bir yerde telafi etmeden y\u00fcksek k\u00fctleli bir levhada ayn\u0131 \u0131slatma marj\u0131n\u0131 korumak.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En y\u00fcksek s\u0131cakl\u0131k ve s\u0131v\u0131n\u0131n \u00fczerindeki zaman (TAL) \u201colmas\u0131 g\u00fczel\u201d de\u011fildir. Bunlar s\u0131n\u0131r ko\u015fullard\u0131r. Yeniden ak\u0131\u015f profili olu\u015fturmaya y\u00f6nelik sat\u0131c\u0131 k\u0131lavuz belgeleri bile paket g\u00fcvenilirli\u011fi i\u00e7in profil s\u0131n\u0131rlar\u0131 i\u00e7inde kalmay\u0131 vurgulamaktad\u0131r. (<a href=\"https:\/\/ww1.microchip.com\/downloads\/aemDocuments\/documents\/OTH\/ApplicationNotes\/ApplicationNotes\/Solder-Reflow-Recommendation-Application-Note-DS00000233.pdf?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\">ww1.microchip.com<\/a>)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-depletion-that-s-really-paste-volume-shadowing\">3) Ger\u00e7ekten macun hacmi + g\u00f6lgeleme olan \u201cT\u00fckenme\u201d<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yap\u0131\u015ft\u0131rma hacmi d\u00fc\u015f\u00fckse, g\u00f6lgeleme \u201cd\u00fc\u015f\u00fck\u201d ifadesini \u201cyeterli de\u011fil\u201d ifadesine d\u00f6n\u00fc\u015ft\u00fcr\u00fcr.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0130\u015fte buras\u0131&nbsp;<strong>SPI verileri<\/strong>&nbsp;evrak i\u015fi olmaktan \u00e7\u0131kar ve bir silah olmaya ba\u015flar. G\u00fc\u00e7l\u00fc bir&nbsp;<strong><a href=\"https:\/\/pickandplacemachine.com\/smt-inspection-system\/\">SMT denetim sistemi<\/a><\/strong>&nbsp;stratejisi (yerle\u015ftirmeden \u00f6nce SPI + yeniden ak\u0131\u015ftan sonra X-\u0131\u015f\u0131n\u0131 \u00f6rneklemesi) a\u00e7l\u0131k modellerini erken yakalar.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-rework-culture-that-cooks-the-same-bga-twice-or-three-times-\">4) Ayn\u0131 BGA'y\u0131 iki kez (veya \u00fc\u00e7 kez) pi\u015firen yeniden i\u015fleme k\u00fclt\u00fcr\u00fc<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Her ekstra yeniden ak\u0131\u015f d\u00f6ng\u00fcs\u00fc riski de\u011fi\u015ftirir. Pedler oksitlenir, ak\u0131 kal\u0131nt\u0131lar\u0131 davran\u0131\u015f\u0131 de\u011fi\u015ftirir, bilyeler farkl\u0131 \u015fekilde \u00e7\u00f6ker ve marj\u0131n\u0131z daral\u0131r. BGA \u00e7\u00f6k\u00fc\u015f\u00fc \u00fczerine 2024 tekrarlanan yeniden ak\u0131\u015f \u00e7al\u0131\u015fmas\u0131, kibar bir akademik s\u00f6ylem bi\u00e7imidir: \u201cEkstra yeniden ak\u0131tmaya \u00fccretsiz yeniden deneme gibi davranmay\u0131 b\u0131rak\u0131n.\u201d (<a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC11173930\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\">PMC<\/a>)<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/pickandplacemachine.com\/wp-admin\/post.php?post=1861&amp;action=edit\"><img decoding=\"async\" width=\"960\" height=\"640\" src=\"https:\/\/pickandplacemachine.com\/wp-content\/uploads\/2026\/03\/SMT-Consumables2.jpg\" alt=\"SMT Sarf Malzemeleri\" class=\"wp-image-5764\" srcset=\"https:\/\/pickandplacemachine.com\/wp-content\/uploads\/2026\/03\/SMT-Consumables2.jpg 960w, https:\/\/pickandplacemachine.com\/wp-content\/uploads\/2026\/03\/SMT-Consumables2-300x200.jpg 300w, https:\/\/pickandplacemachine.com\/wp-content\/uploads\/2026\/03\/SMT-Consumables2-768x512.jpg 768w, https:\/\/pickandplacemachine.com\/wp-content\/uploads\/2026\/03\/SMT-Consumables2-18x12.jpg 18w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"quick-diagnostic-map-use-this-before-you-start-blaming-the-paste-\">H\u0131zl\u0131 te\u015fhis haritas\u0131 (macunu su\u00e7lamaya ba\u015flamadan \u00f6nce bunu kullan\u0131n)<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>R\u00f6ntgen \/ testte belirti<\/th><th>Muhtemel k\u00f6k neden<\/th><th>\u00d6nce ne \u00f6l\u00e7\u00fclmeli<\/th><th>En h\u0131zl\u0131 d\u00fczeltici faaliyet<\/th><\/tr><\/thead><tbody><tr><td>BGA'n\u0131n bir kenar\u0131nda \/ k\u00f6\u015fesinde k\u00fcmelenmi\u015f olarak a\u00e7\u0131l\u0131r<\/td><td>Yeniden ak\u0131\u015f g\u00f6lgelenmesi (yerel so\u011fuk nokta)<\/td><td>G\u00f6lgeli tarafta TC, panel boyunca \u0394T<\/td><td>B\u00f6lge tarifini \/ hava ak\u0131\u015f\u0131n\u0131 ayarlay\u0131n, en k\u00f6t\u00fc durum konumunu yeniden profilleyin<\/td><\/tr><tr><td>Dizi boyunca rastgele a\u00e7\u0131l\u0131r, genel olarak d\u00fc\u015f\u00fck \u00e7\u00f6kme<\/td><td>Zay\u0131f macun hacmi + yetersiz TAL<\/td><td>SPI hacmi %, TAL saniye, tepe noktas\u0131<\/td><td>Bask\u0131y\u0131 d\u00fczeltin (a\u00e7\u0131kl\u0131klar, silecek), ard\u0131ndan yeniden ak\u0131\u015f penceresini geni\u015fletin<\/td><\/tr><tr><td>ICT'de iyi elektrik, s\u0131cakl\u0131k d\u00f6ng\u00fcs\u00fcnden sonra ar\u0131zalan\u0131r<\/td><td>Marjinal \u0131slatma, zay\u0131f intermetalik<\/td><td>X-ray + kesit \u00f6rnekleme, profil tekrarlanabilirli\u011fi<\/td><td>Islatma homojenli\u011fini art\u0131r\u0131n, \u0394T'yi s\u0131k\u0131la\u015ft\u0131r\u0131n, yeniden i\u015fleme d\u00f6ng\u00fclerini azalt\u0131n<\/td><\/tr><tr><td>S\u0131cak tarafta k\u00f6pr\u00fcler, so\u011fuk tarafta a\u00e7\u0131l\u0131r<\/td><td>BGA boyunca s\u0131cakl\u0131k gradyan\u0131<\/td><td>\u00c7ok noktal\u0131 profilleme (her iki taraf)<\/td><td>\u00dcst\/alt \u0131s\u0131tma dengesi, hava ak\u0131\u015f\u0131 ayar\u0131, konvey\u00f6r h\u0131z\u0131<\/td><\/tr><tr><td>\u201cYeniden ak\u0131\u015ftan sonra \u201dSabit\", sonra geri d\u00f6ner<\/td><td>Yenileme kaynakl\u0131 k\u0131r\u0131lganl\u0131k<\/td><td>Yeniden ak\u0131\u015f d\u00f6ng\u00fclerini say\u0131n, yeniden i\u015fleme ge\u00e7mi\u015fini izleyin<\/td><td>\u0130lk ge\u00e7i\u015f profilini iyile\u015ftirme; yeniden ak\u0131\u015f denemelerini s\u0131n\u0131rlama; kontroll\u00fc yeniden toplanma\/yeniden i\u015fleme<\/td><\/tr><tr><td>Sadece kart yo\u011funlu\u011fu de\u011fi\u015fti\u011finde olur<\/td><td>Hava ak\u0131\u015f\u0131 yolu hassasiyeti<\/td><td>Maksimum y\u00fcklemeli profil (tam konvey\u00f6r)<\/td><td>Re\u00e7eteyi y\u00fckleme ko\u015fuluna kilitleyin; re\u00e7ete ailelerini tan\u0131mlay\u0131n<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"why-this-is-a-safety-issue-not-just-a-yield-issue\">Bu neden sadece bir verim sorunu de\u011fil, bir g\u00fcvenlik sorunudur?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">E\u011fer dramatik oldu\u011fumu d\u00fc\u015f\u00fcn\u00fcyorsan\u0131z, d\u00fczenleyiciler sizinle ayn\u0131 fikirde de\u011fil.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NHTSA, Ekim 2023 tarihli 573. B\u00f6l\u00fcm raporunda bir geri \u00e7a\u011f\u0131rma i\u015flemini belgeliyor&nbsp;<strong>eksik lehim ba\u011flant\u0131s\u0131<\/strong>&nbsp;PCBA konnekt\u00f6r\u00fcndeki bir ar\u0131za, kabin so\u011futma suyu \u0131s\u0131t\u0131c\u0131s\u0131n\u0131n kesintili \u00e7al\u0131\u015fmas\u0131na veya hi\u00e7 \u00e7al\u0131\u015fmamas\u0131na neden olarak buz \u00e7\u00f6zme\/sis giderme \u00f6zelli\u011fini etkileyebilir. Bu, tek bir lehim ba\u011flant\u0131s\u0131n\u0131n ara\u00e7 g\u00fcvenli\u011fi sorununa d\u00f6n\u00fc\u015fmesidir. (<a href=\"https:\/\/static.nhtsa.gov\/odi\/rcl\/2023\/RCLRPT-23V688-9845.PDF?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\">static.nhtsa.gov<\/a>)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NHTSA'n\u0131n arka g\u00f6r\u00fc\u015f kameras\u0131 ar\u0131zalar\u0131yla ilgili bir ba\u015fka geri \u00e7a\u011f\u0131rma belgesinde ise sorun \u015fu \u015fekilde tan\u0131mlan\u0131yor&nbsp;<strong>yetersiz lehim ba\u011flant\u0131lar\u0131<\/strong>&nbsp;Bir kamera PCB'sinde zamanla k\u00f6t\u00fcle\u015febilecek lehim b\u00fct\u00fcnl\u00fc\u011f\u00fc, do\u011frudan uyumluluk ve g\u00fcvenlik performans\u0131na ba\u011fl\u0131d\u0131r. (<a href=\"https:\/\/static.nhtsa.gov\/odi\/rcl\/2024\/RCMN-24V879-0236.pdf?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\">static.nhtsa.gov<\/a>)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu y\u00fczden birisi size \u201csadece biraz lehim a\u00e7l\u0131\u011f\u0131 var\u201d dedi\u011finde art\u0131k ba\u015f\u0131m\u0131 sallam\u0131yorum. Sahada 18 ay ge\u00e7irdikten sonra ne oldu\u011funu soruyorum.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"fixes-that-actually-work-and-the-ones-that-waste-your-time-\">Ger\u00e7ekten i\u015fe yarayan d\u00fczeltmeler (ve zaman\u0131n\u0131z\u0131 bo\u015fa harcayanlar)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"fixes-i-trust\">G\u00fcvendi\u011fim d\u00fczeltmeler<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>En k\u00f6t\u00fc durumu profilleyin, ortalamay\u0131 de\u011fil.<\/strong>&nbsp;G\u00f6lgeli yan termokupllar. Tam y\u00fck durumu. \u00c7oklu pano konumlar\u0131.<\/li>\n\n\n\n<li><strong>BGA kom\u015fulu\u011fu boyunca \u0394T'yi kontrol edin.<\/strong>&nbsp;M\u00fckemmelli\u011fe ihtiyac\u0131n\u0131z yok. Tekrarlanabilirli\u011fe ihtiyac\u0131n\u0131z var.<\/li>\n\n\n\n<li><strong>BGA riskiyle e\u015fle\u015fen SPI e\u015fiklerini kullan\u0131n.<\/strong>&nbsp;Hacim d\u00fc\u015f\u00fck seyrediyorsa \u201cg\u00fczel\u201d bask\u0131lar\u0131n ge\u00e7mesine izin vermeyin.<\/li>\n\n\n\n<li><strong>Pano termal s\u0131n\u0131f\u0131na g\u00f6re tarif aileleri.<\/strong>&nbsp;Evrensel bir f\u0131r\u0131n tarifi bir hayaldir.<\/li>\n\n\n\n<li><strong>K\u00f6r yeniden ak\u0131\u015f denemelerini s\u0131n\u0131rlay\u0131n.<\/strong>&nbsp;Bir kez ba\u015far\u0131s\u0131z olduysa, nedenini bulun. Tekrar pi\u015firip umutlanmay\u0131n.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">S\u00fcre\u00e7 disiplinini sa\u011flamla\u015ft\u0131rman\u0131z gerekiyorsa, resmi e\u011fitim at\u00f6lyede ba\u015fka bir tart\u0131\u015fmadan daha fazla yard\u0131mc\u0131 olur. \u0130\u015fte bu y\u00fczden&nbsp;<strong><a href=\"https:\/\/pickandplacemachine.com\/solution\/training-after-sales-support\/\">e\u011fitim ve sat\u0131\u015f sonras\u0131 destek<\/a><\/strong>&nbsp;s\u00fcre\u00e7 paketinin bir par\u00e7as\u0131 olarak - \u00e7\u00fcnk\u00fc kusur modeli genellikle vardiya de\u011fi\u015fti\u011finde geri d\u00f6ner.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"fixes-i-don-t-trust-alone-\">G\u00fcvenmedi\u011fim d\u00fczeltmeler (yaln\u0131z)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u201cMacun sat\u0131c\u0131s\u0131n\u0131 de\u011fi\u015ftir.\u201d (Bazen ge\u00e7erli. Genellikle dikkat da\u011f\u0131t\u0131c\u0131.)<\/li>\n\n\n\n<li>\u201cDaha fazla tepe ekleyin.\u201d (Tebrikler, az \u00f6nce \u00e7arp\u0131lma ve bo\u015fluk riski yaratt\u0131n\u0131z.)<\/li>\n\n\n\n<li>\u201cHer \u015feyi yava\u015flat\u0131n.\u201d (Verim \u00f6l\u00fcr, k\u00f6k neden kal\u0131r.)<\/li>\n\n\n\n<li>\u201cAOI onu yakalayacakt\u0131r.\u201d (AOI BGA'lar\u0131n alt\u0131n\u0131 g\u00f6rmez. Bunu zaten biliyorsunuz.)<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/pickandplacemachine.com\/wp-admin\/post.php?post=1928&amp;action=edit\"><img decoding=\"async\" width=\"960\" height=\"640\" src=\"https:\/\/pickandplacemachine.com\/wp-content\/uploads\/2026\/03\/SMT-Consumables1.jpg\" alt=\"SMT Sarf Malzemeleri\" class=\"wp-image-5763\" srcset=\"https:\/\/pickandplacemachine.com\/wp-content\/uploads\/2026\/03\/SMT-Consumables1.jpg 960w, https:\/\/pickandplacemachine.com\/wp-content\/uploads\/2026\/03\/SMT-Consumables1-300x200.jpg 300w, https:\/\/pickandplacemachine.com\/wp-content\/uploads\/2026\/03\/SMT-Consumables1-768x512.jpg 768w, https:\/\/pickandplacemachine.com\/wp-content\/uploads\/2026\/03\/SMT-Consumables1-18x12.jpg 18w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"printing-reflow-stop-treating-them-like-strangers\">Bask\u0131 + yeniden ak\u0131\u015f: onlara yabanc\u0131 gibi davranmay\u0131 b\u0131rak\u0131n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">BGA lehim t\u00fckenmesi, bask\u0131 ve yeniden ak\u0131tman\u0131n k\u00f6t\u00fc bir \u015fekilde el s\u0131k\u0131\u015ft\u0131\u011f\u0131 yerdir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bask\u0131 s\u00fcreciniz sallant\u0131l\u0131ysa, yaz\u0131c\u0131 temellerini ve kapasitesini s\u0131k\u0131la\u015ft\u0131rarak i\u015fe ba\u015flay\u0131n. Ekipman se\u00e7iyor veya y\u00fckseltiyorsan\u0131z, t\u00fcm bask\u0131 ekosistemi (\u015fablon, destek tak\u0131mlar\u0131, macun i\u015fleme ve tekrarlanabilirlik) konusunda ciddi olun; \u00e7\u00fcnk\u00fc a\u00e7l\u0131\u011f\u0131n do\u011fdu\u011fu yer yaz\u0131c\u0131d\u0131r. Genel bak\u0131\u015f\u0131m\u0131z&nbsp;<strong><a href=\"https:\/\/pickandplacemachine.com\/solder-paste-printer\/\">lehim pastas\u0131 yaz\u0131c\u0131s\u0131<\/a><\/strong>&nbsp;se\u00e7enekleri bu konu\u015fma i\u00e7in iyi bir ba\u015flang\u0131\u00e7 noktas\u0131d\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ard\u0131ndan f\u0131r\u0131n taraf\u0131n\u0131, \u00fcr\u00fcn kar\u0131\u015f\u0131m\u0131 boyunca profil stabilitesini koruyabilen ekipmanla do\u011frulay\u0131n. F\u0131r\u0131n se\u00e7eneklerini g\u00f6zden ge\u00e7iriyorsan\u0131z, bu noktada do\u011fru&nbsp;<strong><a href=\"https:\/\/pickandplacemachine.com\/reflow-ovens\/\">yeniden ak\u0131\u015f f\u0131r\u0131nlar\u0131<\/a><\/strong>&nbsp;yap\u0131land\u0131rma ve bak\u0131m disiplini marka sadakatinden daha \u00f6nemlidir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faqs\">SSS<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"what-is-bga-solder-depletion-\">BGA lehim t\u00fckenmesi nedir?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">BGA lehim t\u00fckenmesi, genellikle d\u00fczensiz \u0131s\u0131tma, yetersiz macun hacmi veya yeniden ak\u0131\u015f s\u0131ras\u0131nda lehim hareketi nedeniyle, bir BGA ba\u011flant\u0131s\u0131n\u0131n i\u015flemin bekledi\u011finden daha az etkili lehimle olu\u015ftu\u011fu ve montaj \u00fcst taraftan normal g\u00f6r\u00fcnse bile dizinin baz\u0131 k\u0131s\u0131mlar\u0131n\u0131 az \u0131slat\u0131lm\u0131\u015f ve mekanik olarak zay\u0131f b\u0131rakan bir durumdur. Pratikte, \u00f6zellikle g\u00f6lgelenme so\u011fuk b\u00f6lgeler olu\u015fturdu\u011funda, termal stres sonras\u0131 d\u00fczensiz \u00e7\u00f6kme, kenar-bilye a\u00e7\u0131lmalar\u0131 veya aral\u0131kl\u0131 ar\u0131zalar olarak ortaya \u00e7\u0131kar.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"what-causes-bga-solder-depletion-during-reflow-\">Yeniden ak\u0131\u015f s\u0131ras\u0131nda BGA lehiminin t\u00fckenmesine ne sebep olur?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yeniden ak\u0131\u015f s\u0131ras\u0131nda BGA lehiminin t\u00fckenmesi genellikle macun hacmi, flux aktivasyon zamanlamas\u0131 ve termal profil aras\u0131ndaki y\u0131\u011f\u0131lm\u0131\u015f uyumsuzluktan kaynaklan\u0131r; burada y\u00fcksek k\u00fctleli veya uzun bile\u015fenlerden gelen g\u00f6lgelenme, \u0131slanmay\u0131 geciktiren ve dizi boyunca d\u00fczg\u00fcn lehim topu \u00e7\u00f6kmesini azaltan yerel so\u011fuk noktalar olu\u015fturur. SPI s\u0131n\u0131rda hacim g\u00f6steriyorsa ve profil BGA kom\u015fulu\u011funda \u0394T g\u00f6steriyorsa, ola\u011fan e\u015fle\u015fmenizi buldunuz demektir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"what-is-the-bga-shadowing-effect-\">BGA g\u00f6lgeleme etkisi nedir?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">BGA g\u00f6lgeleme etkisi, yak\u0131ndaki bile\u015fenler, kalkanlar veya \u0131s\u0131 al\u0131c\u0131lar\u0131 konveksiyon veya radyatif \u0131s\u0131 transferini bozarak \u0131slatma ve yeniden ak\u0131\u015f s\u0131ras\u0131nda kart\u0131n geri kalan\u0131n\u0131 geciktiren daha so\u011fuk bir b\u00f6lge olu\u015fturdu\u011fundan, bir BGA b\u00f6lgesinin yak\u0131n\u0131ndaki \u0131s\u0131tma h\u0131z\u0131nda ve tepe s\u0131cakl\u0131\u011f\u0131nda yerel bir azalmad\u0131r. Bu gecikme ak\u0131 davran\u0131\u015f\u0131n\u0131 ve \u0131slatma zamanlamas\u0131n\u0131 de\u011fi\u015ftirir, bu nedenle tek tarafl\u0131 veya k\u00f6\u015fe tarafl\u0131 a\u00e7\u0131lmalar g\u00f6r\u00fcrs\u00fcn\u00fcz.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"how-do-you-prevent-bga-solder-depletion-\">BGA lehiminin t\u00fckenmesini nas\u0131l \u00f6nlersiniz?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">BGA lehiminin t\u00fckenmesini \u00f6nlemek, her BGA bilyesinin sabit bir \u0131slatma penceresine ula\u015fmas\u0131 i\u00e7in yeterli i\u015flem marj\u0131 olu\u015fturmak anlam\u0131na gelir; bu da lehim pastas\u0131 hacmini (SPI limitleri) kontrol etmeyi, en k\u00f6t\u00fc durum profillemesiyle termal gradyanlar\u0131 en aza indirmeyi ve herkese uyan tek bir kurulum yerine kart termal s\u0131n\u0131f\u0131yla e\u015fle\u015fen f\u0131r\u0131n tarifleri kullanmay\u0131 gerektirir. Macun hacmi kontrol\u00fc ile ba\u015flay\u0131n, ard\u0131ndan g\u00f6lgeli taraf\u0131 maksimum y\u00fckleme ko\u015fullar\u0131 alt\u0131nda profilleyin.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"how-do-you-fix-bga-solder-starvation-after-it-happens-\">BGA lehim a\u00e7l\u0131\u011f\u0131 meydana geldikten sonra nas\u0131l d\u00fczeltilir?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">BGA lehim a\u00e7l\u0131\u011f\u0131n\u0131 gidermek, temel nedeni (bask\u0131 hacmi ve yeniden ak\u0131\u015f profili) ele alarak dizi boyunca tam ba\u011flant\u0131 olu\u015fumunu geri y\u00fcklemek ve ard\u0131ndan etkilenen montajlar\u0131 kontroll\u00fc y\u00f6ntemler kullanarak yeniden i\u015flemek anlam\u0131na gelir, \u00e7\u00fcnk\u00fc tekrarlanan k\u00f6r yeniden ak\u0131\u015f, \u00e7\u00f6kme davran\u0131\u015f\u0131n\u0131 de\u011fi\u015ftirebilir ve zaman i\u00e7inde g\u00fcvenilirlik marj\u0131n\u0131 azaltabilir. (<a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC11173930\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\">PMC<\/a>) E\u011fer hata g\u00f6lgelenmeden kaynaklan\u0131yorsa, profil d\u00fczeltmesi ve kontroll\u00fc bir yeniden i\u015fleme (\u201ch\u0131zl\u0131 ikinci f\u0131r\u0131nlama\u201d de\u011fil) daha g\u00fcvenli bir yoldur.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"how-can-i-detect-solder-paste-depletion-under-a-bga-before-reflow-\">Yeniden ak\u0131\u015ftan \u00f6nce BGA alt\u0131ndaki lehim pastas\u0131 t\u00fckenmesini nas\u0131l tespit edebilirim?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yeniden ak\u0131\u015ftan \u00f6nce bir BGA alt\u0131nda lehim pastas\u0131 t\u00fckenmesini tespit etmek, BGA riskini yans\u0131tan e\u015fiklere kar\u015f\u0131 SPI ile pasta biriktirme hacmini ve alan\u0131n\u0131 \u00f6l\u00e7mek anlam\u0131na gelir, \u00e7\u00fcnk\u00fc g\u00f6rsel kontroller ve AOI, yeniden ak\u0131\u015f s\u0131ras\u0131nda d\u00fczg\u00fcn bilye \u00e7\u00f6kmesini desteklemek i\u00e7in gereken pasta k\u00fctlesini g\u00fcvenilir bir \u015fekilde de\u011ferlendiremez. SPI'n\u0131z yoksa, en yayg\u0131n a\u00e7l\u0131k tetikleyicisinde etkili bir \u015fekilde k\u00f6r u\u00e7uyorsunuz demektir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"conclusion\">Sonu\u00e7<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Panel konumu veya \u00fcr\u00fcn kar\u0131\u015f\u0131m\u0131 ile \u201chareket eden\u201d BGA lehim t\u00fckenmesi g\u00f6r\u00fcyorsan\u0131z, bunun k\u00f6t\u00fc \u015fans de\u011fil, g\u00f6lgelenme art\u0131 ince macun oldu\u011funa bahse girerim. Kart\u0131n\u0131z\u0131n termal s\u0131n\u0131f\u0131n\u0131, hatvesini (0,4\/0,5\/0,8 mm), ala\u015f\u0131m\u0131n\u0131 (SAC305 veya benzeri) ve mevcut profil hedeflerinizi payla\u015f\u0131n, biz de size ilk olarak neyi \u00f6l\u00e7meniz gerekti\u011fini s\u00f6yleyelim. Kullan\u0131m&nbsp;<strong><a href=\"https:\/\/pickandplacemachine.com\/contact\/\">i\u0307leti\u0307\u015fi\u0307m sayfamiz<\/a><\/strong>&nbsp;ve bir X-ray g\u00f6r\u00fcnt\u00fcs\u00fc ile son profilleyici \u00e7al\u0131\u015ft\u0131rman\u0131z\u0131 ekleyin.<\/p>","protected":false},"excerpt":{"rendered":"<p>BGA lehim t\u00fckenmesi, kart\u0131n profilini \u00e7\u0131kar\u0131p so\u011fuk noktalar\u0131 g\u00f6rene kadar bir macun sorunu gibi g\u00f6r\u00fcn\u00fcr. Bu yaz\u0131, yeniden ak\u0131\u015f g\u00f6lgelenmesini, BGA'lara ne yapt\u0131\u011f\u0131n\u0131 ve hatta ger\u00e7ekten dayanan d\u00fczeltmeleri a\u00e7\u0131klar.<\/p>","protected":false},"author":1,"featured_media":5765,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","footnotes":""},"categories":[837],"tags":[1107,1108,917,1105,1106,894],"class_list":["post-5762","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-process-quality","tag-bga-reflow","tag-smt-process-control","tag-solder-paste-printing","tag-solder-starvation","tag-thermal-profiling","tag-x-ray-inspection"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/posts\/5762","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/comments?post=5762"}],"version-history":[{"count":2,"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/posts\/5762\/revisions"}],"predecessor-version":[{"id":6366,"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/posts\/5762\/revisions\/6366"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/media\/5765"}],"wp:attachment":[{"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/media?parent=5762"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/categories?post=5762"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/tags?post=5762"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}