Izimo zemvelo zokugcinwa kwezingxenye zokuhlanganiswa kwendawo:
1. Izinga lokushisa le-ambient: izinga lokushisa lesitoreji <40℃
2. Izinga lokushisa lendawo yokukhiqiza <30℃
3. Umswakama we-ambient : < RH60%
4. Umkhathi wendawo ezungezile: awekho amagesi anobuthi njengesulfure, i-chlorine ne-asidi ethinta ukusebenza kokushisela avunyelwe endaweni yokugcina kanye nokusebenza.
5. Izinyathelo ze-Antistatic: zihlangabezana nezidingo ze-antistatic zezingxenye ze-SMT.
6. Isikhathi sokugcinwa kwezingxenye: isikhathi sokugcina ngeke sidlule iminyaka emi-2 kusukela ngosuku lokukhiqiza lomkhiqizi wengxenye;Isikhathi sokusungula sabasebenzisi befekthri yomshini ngemva kokuthenga ngokuvamile asibi ngaphezu konyaka ongu-1;Uma imboni isendaweni yemvelo enomswakama, izingxenye ze-SMT kufanele zisetshenziswe phakathi nezinyanga ezi-3 ngemva kokuthenga, futhi izinyathelo ezifanele zokuvikela umswakama kufanele zithathwe endaweni yokugcina nokupakishwa kwezingxenye.
7. Amadivayisi we-SMD anezidingo zokumelana nomswakama.Kufanele isetshenziswe kungakapheli amahora angama-72 ngemuva kokuvulwa futhi kungabi ngaphezu kwesonto elilodwa.Uma ingeke ikwazi ukusetshenziswa, kufanele igcinwe ku-DRYING box engu-RH20%, futhi amadivaysi e-SMD abenomswakama kufanele omiswe futhi asuswe umswakama ngokuvumelana nezinhlinzeko.
8. I-SMD (SOP, Sj, lCC ne-QFP, njll.) efakwe ku-plastic tube ayimelani nokushisa okuphezulu futhi ayikwazi ukubhaka ngokuqondile kuhhavini.Kufanele ifakwe eshubhu lensimbi noma ethreyini yensimbi ukuze ibhakwe.
9. Ipuleti yepulasitiki yokupakisha ye-QFP ayilona izinga lokushisa eliphakeme nokumelana nokushisa okuphezulu okubili.Ukumelana nokushisa okuphezulu (inothi Tmax=135℃, 150℃ noma MAX180 ℃, njll.) kungafakwa ngokuqondile kuhhavini ukuze kubhakwe;Amazinga okushisa aphezulu angeke abe ngqo kuhhavini yokubhaka, uma kwenzeka izingozi, kufanele abekwe epuleti lensimbi lokubhaka.Ukulimala kwezikhonkwane kufanele kuvinjelwe ngesikhathi sokujikeleza, ukuze ungabhubhisi izakhiwo zabo ze-coplanar.
Ezokuthutha, ukuhlunga, ukuhlola noma ukukhwezwa mathupha:
Uma udinga ukuthatha idivayisi ye-SMD, gqoka ibhande lesihlakala le-ESD futhi usebenzise ipeni ukuncela ukuze ugweme ukulimaza izikhonkwane ze-SOP kanye namadivayisi we-QFP ukuze uvimbele ukungqubuzana kwephini kanye nokuguqulwa.
I-SMD esele ingagcinwa kanje:
Ifakwe izinga lokushisa eliphansi elikhethekile kanye nebhokisi lokugcina umswakama ophansi.Gcina i-SMD engasetshenziswa okwesikhashana ngemva kokuvula noma kanye nesiphakeli ebhokisini.Kodwa ifakwe ukushisa okuphansi okukhethekile okukhethekile kanye nethangi lokugcina elinomswakama ophansi kubiza kakhulu.
Sebenzisa izikhwama zokupakisha zangempela.Uma nje isikhwama siqinile futhi i-desiccant isesimweni esihle (yonke imibuthano emnyama ekhadini lenkomba yomswakama iluhlaza okwesibhakabhaka, ayikho i-pink), i-SMD engasetshenziswanga isengabuyiselwa esikhwameni futhi ivalwe nge-tape.
Isikhathi sokuthumela: Sep-14-2021