Koyi wannan, PCB allon plating baya Layer!

A lokacin masana'antu aiwatar da PCB allon, da yawa m yanayi zai faru, kamar electroplated jan karfe, sinadaran jan plating, zinariya plating, tin-lead gami plating da sauran plating Layer delamination. To mene ne dalilin wannan stratification?

A karkashin iska mai haske na ultraviolet, mai daukar hoto wanda ke shayar da makamashin hasken ya lalace a cikin rukunin kyauta wanda ke haifar da halayen photopolymerization kuma ya samar da kwayoyin jikin da ba shi da narkewa a cikin maganin alkali. Ƙarƙashin bayyanar, saboda rashin cikar polymerization, a lokacin tsarin ci gaba, fim din yana kumburi da laushi, wanda ya haifar da layin da ba a sani ba har ma da fim din ya fadi, yana haifar da rashin daidaituwa tsakanin fim da jan karfe; Idan bayyanar ta wuce gona da iri, zai haifar da matsaloli a cikin ci gaba, kuma zai haifar da warping da bawo yayin aikin platining, samar da platin infiltration. Don haka yana da mahimmanci a sarrafa makamashin fallasa; Bayan an kula da saman jan ƙarfe, lokacin tsaftacewa ba shi da sauƙi don yin tsayi da yawa, saboda ruwan tsaftacewa kuma ya ƙunshi wani adadin adadin acidic, ko da yake abin da ke ciki yana da rauni, amma tasirin da ke kan saman jan karfe ba zai iya ba. a ɗauka da sauƙi, kuma aikin tsaftacewa ya kamata a gudanar da shi daidai da ƙayyadaddun tsari.

Babban dalilin da yasa launin zinari ya fado daga saman Layer na nickel shine saman maganin nickel. The matalauta surface aiki na nickel karfe yana da wuya a sami m sakamako. Fuskar murfin nickel yana da sauƙi don samar da fim ɗin wucewa a cikin iska, irin su jiyya mara kyau, zai raba launi na zinariya daga saman nickel Layer. Idan kunnawa bai dace ba a cikin na'urar lantarki, za a cire ma'aunin gwal daga saman Layer na nickel kuma a cire shi. Dalili na biyu shi ne, bayan kunnawa, lokacin tsaftacewa ya yi tsayi sosai, yana sa a sake yin fim ɗin wucewa a saman nickel, sa'an nan kuma ya zama gilded, wanda ba makawa zai haifar da lahani a cikin rufin.

Akwai dalilai da yawa na plating delamination, idan kana so ka yi irin wannan halin da ake ciki a cikin aiwatar da farantin samar ba ya faruwa, yana da muhimmiyar dangantaka da kula da alhakin masu fasaha. Don haka, ƙwararrun masana'antun PCB za su gudanar da ingantaccen horo ga kowane ma'aikacin bita don hana isar da samfuran ƙasa.