SMT reflow oveniine nitrogen (N2) ndiyo inonyanya kukosha mukuderedza welding surface oxidation, kunatsiridza kunyorova kwewelding, nekuti nitrogen imhando yegasi inert, isiri nyore kugadzira makomisheni nesimbi, inogona zvakare kucheka okisijeni mumhepo. uye kusangana nesimbi pakupisa kwepamusoro uye nekumhanyisa iyo oxidation reaction.
Chekutanga, iyo musimboti wekuti nitrogen inogona kuvandudza SMT weldability yakavakirwa pakuti tension yepasi ye solder pasi penitrogen nharaunda ishoma pane inofumurwa kumhepo yemhepo, iyo inovandudza fluidity uye wettability ye solder.
Chechipiri, nitrogen inoderedza kunyungudika kweokisijeni mumhepo yepakutanga uye zvinhu zvinogona kusvibisa welding pamusoro, zvichideredza zvakanyanya oxidation yekushisa kwepamusoro solder, kunyanya mukuvandudza kwechipiri chebackwelding quality.
Nitrogen haisi mushonga wePCB oxidation.Kana pamusoro pechikamu kana bhodhi redunhu rakanyanya oxidized, nitrogen haizodzose kuhupenyu, uye nitrogen inongobatsira kune madiki oxidation.
Zvakanakira zvesolder reflow ovenne nitrogen:
Deredzai oxidation yevira
Kuvandudza welding capacity
Kuwedzera solderability
Deredza chiyero chemhango.Nekuti solder paste kana solder pad oxidation yakaderedzwa, kuyerera kwe solder kuri nani.
Zvakaipa zveSMT solder muchinane nitrogen:
kupisa
Inowedzera mukana wekugadzira tombstone
Enhanced capillarity (wick effect)
Nguva yekutumira: Aug-24-2021