I-oven ye-SMT egeleza kabushange-nitrogen (N2) iyindima ebaluleke kakhulu ekunciphiseni i-welding surface oxidation, ithuthukise ukumanzisa kokushisela, ngoba i-nitrogen iwuhlobo lwegesi engasebenzi, akulula ukukhiqiza izinhlanganisela ngensimbi, futhi inganqamula umoya-mpilo emoyeni. kanye nokuxhumana kwensimbi ekushiseni okuphezulu futhi kusheshise ukusabela kwe-oxidation.
Okokuqala, isimiso sokuthi i-nitrogen ingathuthukisa ukushiselwa kwe-SMT isekelwe eqinisweni lokuthi ukungezwani kwendawo ye-solder ngaphansi kwemvelo ye-nitrogen kungaphansi kwalokho okuvezwe endaweni yomoya, okuthuthukisa ukumanzi nokumanzisa kwe-solder.
Okwesibili, i-nitrogen inciphisa ukuncibilika komoya-mpilo emoyeni wokuqala kanye nezinto ezingangcolisa indawo yokushisela, inciphise kakhulu i-oxidation ye-solder yokushisa ephezulu, ikakhulukazi ekuthuthukiseni ikhwalithi ye-backwelding yesibili.
I-nitrogen ayilona i-panacea ye-PCB oxidation.Uma ingaphezulu lengxenye noma ibhodi lesifunda ligcwele i-oxidized, i-nitrogen ngeke iyibuyisele ekuphileni, futhi i-nitrogen iwusizo kuphela ekuhlanganiseni okuncane.
Izinzuzo zeI-oven ye-solder reflownge-nitrogen:
Yehlisa i-oxidation yesithando somlilo
Thuthukisa umthamo wokushisela
Thuthukisa i-solderability
Yehlisa izinga lomgodi.Ngenxa yokuthi i-solder paste noma i-solder pad oxidation iyancipha, ukugeleza kwe-solder kungcono.
Ububi beUmshini wokugcwalisa we-SMTnge-nitrogen:
shisa
Yandisa amathuba okukhiqiza amatshe ethuna
I-capillarity ethuthukisiwe (umphumela we-wick)
Isikhathi sokuthumela: Aug-24-2021