Ts'ebetsong ea SMT, li-substrates tsa PCB pele li qala ho sebetsa, PCB e tla hlahlojoa le ho lekoa, e khethiloe ho finyella litlhoko tsa tlhahiso ea SMT ea PCB, 'me ba sa tšoanelehang ba khutlisetsoe ho mofani oa PCB, litlhoko tse khethehileng tsa PCB li ka fetisetsoa ho IPc-a-610c International General Electronics Industry Assembly Standards, tse latelang ke tse ding tsa ditlhoko tsa motheo tsa tshebetso ya SMT ya PCB.
1. PCB e tlameha ho ba e bataletseng le e boreleli
Litlhoko tse akaretsang tsa PCB tse bataletseng le tse boreleli, li ke ke tsa phunya, kapa khatisong ea solder peista le ho beoa mochini oa SMT ho tla hlahisa kotsi e kholo, joalo ka litlamorao tsa mapetsong.
2. The mogote conductivity
Mochineng oa solder le mochini oa wave soldering, ho tla ba le sebaka sa preheat, hangata ho futhumatsa PCB ka mokhoa o ts'oanang, 'me ho mocheso o itseng, ho ntlafatsa boleng ba mocheso oa substrate ea PCB, ho hlahisa bobe bo fokolang.
3. Ho hanyetsa mocheso
Ka nts'etsopele ea ts'ebetso ea SMT le litlhoko tsa tikoloho, ts'ebetso e se nang lead le eona e 'nile ea sebelisoa haholo, empa hape e bakoa ke ho phahama ha mocheso oa tjheseletsa, ho hanyetsa mocheso oa litlhoko tse phahameng tsa PCB, ts'ebetso e se nang lead ho reflow soldering, mocheso o lokela ho ba teng. fihla 217 ~ 245 ℃, nako e nka 30 ~ 65s, kahoo PCB kakaretso mocheso ho hanyetsa likhato 260 Celsius, 'me ho qetela ditlhoko 10s.
4. Ho khomarela ha foil ea koporo
Matla a tlamahano ea foil ea koporo e lokela ho fihla ho 1.5kg/cm² ho thibela PCB ho oa ka lebaka la matla a kantle.
5. Litekanyetso tsa ho kobeha
PCB e na le maemo a itseng a kobang, ka kakaretso ho fihlela ho feta 25kg/mm
6. Ts'ebetso e ntle ea motlakase
PCB e le mojari oa likarolo tsa elektronike, ho finyella kamano pakeng tsa likarolo, ho itšetleha ka mela PCB ho tsamaisa, PCB ha ea lokela ho ba le conductivity e ntle ea motlakase feela, le melapo ea PCB e robehileng e ke ke ea kopanya ka ho toba, kapa ts'ebetso ea sehlahisoa sohle. e tla baka tšusumetso e kholo.
7. E ka mamella ho hlatsoa ha solvent
PCB tlhahiso, ho le bonolo ho fumana ditshila, hangata lokela ho hlatsoa boto metsi le solvents tse ling bakeng sa ho hloekisa, kahoo PCB e lokela ho ba khona ho mamella ho hlatsuoa solvent, ntle le ho hlahisa bubble le ba bang ba karabelo e mpe.
Tsena ke tse ling tsa litlhoko tsa mantlha bakeng sa PCB e tšoanelehang ts'ebetsong ea SMT.
Nako ea poso: Mar-11-2022