Iimeko zokusingqongileyo zokugcinwa kwamacandelo okuhlanganisa umphezulu:
1. Ubushushu be-Ambient: ubushushu bokugcina <40℃
2. Ubushushu bendawo yokuvelisa <30℃
3. Ukufuma kwe-Ambient : < RH60%
4. Umoya wokusingqongileyo: akukho gesi ezinobuthi ezifana ne-sulfure, i-chlorine kunye ne-asidi echaphazela ukusebenza kwe-welding zivunyelwe kwindawo yokugcina kunye nokusebenza.
5. Imilinganiselo ye-Antistatic: ukuhlangabezana neemfuno ze-antistatic zamacandelo e-SMT.
6. Ixesha lokugcinwa kwamacandelo: ixesha lokugcina aliyi kudlula iminyaka emi-2 ukususela kumhla wokuveliswa komenzi wecandelo;Ixesha loluhlu lwabasebenzisi befektri yomatshini emva kokuthenga ngokuqhelekileyo alikho ngaphezu kwe-1 unyaka;Ukuba umzi-mveliso ukwindawo yendalo enomswakama, amacandelo e-SMT kufuneka asetyenziswe kwiinyanga ezi-3 emva kokuthenga, kwaye amanyathelo afanelekileyo obungqina bobumanzi kufuneka athathwe kwindawo yokugcina kunye nokupakishwa kwamacandelo.
7. Izixhobo ze-SMD ezineemfuno zokuxhathisa ukufuma.Kufuneka isetyenziswe kwiiyure ezingama-72 emva kokuvulwa kwaye ingabi ngaphezu kweveki enye.Ukuba ayinakusetyenziswa, kufuneka igcinwe kwi-DRYING bhokisi ye-RH20%, kunye nezixhobo ze-SMD eziye zamanzi kufuneka zomiswe kwaye zihlanjululwe ngokwemiqathango.
8. I-SMD (i-SOP, i-Sj, i-lCC kunye ne-QFP, njl.) epakishwe kwi-tube yeplastiki ayinakumelana nokushisa okuphezulu kwaye ayikwazi ukubhaka ngokuthe ngqo kwi-oven.Kufuneka ifakwe kwityhubhu yesinyithi okanye i-tray yensimbi ukuba ibhakwe.
9. I-QFP yokupakisha ipleyiti yeplastiki ayikho ubushushu obuphezulu kunye nokumelana nokushisa okuphezulu ezimbini.Ukumelana nobushushu obuphezulu (inqaku Tmax=135℃, 150℃ okanye MAX180 ℃, njl.) inokufakwa ngqo kwi-oven yokubhaka;Iqondo lokushisa eliphezulu alikwazi ukuba ngqo kwi-oven yokubhaka, kwimeko yeengozi, kufuneka ifakwe kwisitya sesinyithi sokubhaka.Ukulimala kwezikhonkwane kufuneka kuthintelwe ngexesha lokujikeleza, ukuze ungabhubhisi iimpawu zabo ze-coplanar.
Uthutho, ukuhlela, ukuhlola okanye ukunyuswa ngesandla:
Ukuba ufuna ukuthatha isixhobo se-SMD, nxiba i-ESD wrist strap kwaye usebenzise ipeni yokufunxa ukuze ugweme ukonakalisa izikhonkwane ze-SOP kunye ne-QFP izixhobo zokukhusela i-pin warping kunye ne-deformation.
I-SMD eseleyo inokugcinwa ngolu hlobo lulandelayo:
Ixhotyiswe ngobushushu obukhethekileyo obuphantsi kunye nebhokisi yokugcina ukufuma okuphantsi.Gcina i-SMD engasetyenziswanga okwethutyana emva kokuvula okanye kunye ne-feeder ebhokisini.Kodwa ixhotyiswe ngobushushu obukhethekileyo obukhethekileyo obuphantsi kunye netanki yokugcina ukufuma okuphantsi kubiza phezulu.
Sebenzisa iingxowa zokupakisha zokuqala.Ngethuba nje isikhwama sichanekile kwaye i-desiccant ikwimeko efanelekileyo (zonke izangqa ezimnyama kwikhadi lesalathisi somswakama ziluhlaza okwesibhakabhaka, akukho pink), i-SMD engasetyenziswanga isenokubuyiselwa kwisikhwama kwaye itywinwe nge-tape.
Ixesha lokuposa: Sep-14-2021