SMT reflow ontongle naetrojene (N2) ke karolo ea bohlokoa ka ho fetisisa ho fokotsa tjheseletsa holim'a oxidation, ntlafatsa wettability ea tjheseletsa, hobane naetrojene ke mofuta oa khase inert, ha ho bonolo ho hlahisa metsoako ka tšepe, e ka boela khaola oksijene moeeng. le ho kopana le tšepe ka mocheso o phahameng le ho potlakisa karabelo ea oxidation.
Ntlha ea pele, molao-motheo oa hore naetrojene e ka ntlafatsa ho cheseha ha SMT e itšetlehile ka 'nete ea hore tsitsipano ea holim'a solder tlas'a tikoloho ea naetrojene e tlase ho feta e pepesehileng tikolohong ea sepakapaka, e leng ho ntlafatsang metsi le metsi a solder.
Ea bobeli, naetrojene e fokotsa solubility ea oksijene moeeng oa pele le thepa e ka silafatsang holim'a tjheseletsa, e fokotsa haholo oxidation ea mocheso o phahameng oa solder, haholo-holo ntlafatsong ea boleng ba backwelding ea bobeli.
Nitrojene ha se pheko bakeng sa oxidation ea PCB.Haeba bokaholimo ba karolo kapa boto ea potoloho bo tletse oxidation haholo, naetrojene e ke ke ea e khutlisetsa bophelong, 'me naetrojene e thusa feela bakeng sa oxidation e nyane.
Melemo easolder reflow ontongka nitrogen:
Fokotsa oxidation ea sebōpi
Ntlafatsa bokhoni ba tjheseletsa
Ntlafatsa ho solderability
Fokotsa sekhahla sa sekhahla.Hobane solder paste kapa solder pad oxidation e fokotsehile, ho phalla ha solder ho molemo.
Mefokolo eaMochini oa solder oa SMTka nitrogen:
chesa
E eketsa monyetla oa ho hlahisa li-tombstone
Matla a matla a capillarity (phello ea wick)
Nako ea poso: Aug-24-2021