I-SMT (umphezulu weNtaba yeTekhnoloji) ukusetyenzwa bubuchule obubalulekileyo ekwenzeni izixhobo zombane. Kubasebenzi abatsha kule ndawo, ukuqonda ukuhamba kwenkqubo yendibano ye-SMT kubalulekile. Eli nqaku lichaza amanyathelo aphambili kwi-SMT processing ukukunceda ukuba ubambe ngokukhawuleza imiba engundoqo yobu buchwepheshe.
Ingcamango esisiseko yoLungiselelo lwe-SMT
Ukusetyenzwa kwe-SMT kubandakanya ukunyuswa ngokuthe ngqo kwezixhobo ze-elektroniki kumphezulu weebhodi zesekethe eziprintiweyo (PCBs) kunye nokuzithengisa kusetyenziswa iindlela ezinje nge-reflow soldering okanye i-wave soldering. Xa kuthelekiswa nobuchwephesha bomngxunya obuqhelekileyo, i-SMT ibonelela ngezinto eziluncedo ezinjengoxinano oluphezulu lwendibano, ubungakanani obuncinci, ubunzima obukhaphukhaphu, ukuthembeka okukhulu, kunye nempumelelo ephezulu yemveliso, iyenza isetyenziswe ngokubanzi kwimveliso yale mihla yombane.
Ukuqhutywa komsebenzi we-SMT ikakhulu kubandakanya la manyathelo alandelayo:
Uyilo lwePCB kunye noKwakha
Inyathelo lokuqala kwi-SMT processing li uyilo kunye nokwenza iPCB ehlangabezana neemfuno. Uyilo lwePCB kufuneka luthathele ingqalelo icandelo lobeko, umzila, kunye neemfuno zenkqubo yokuthengisela. Nje ukuba ziyiliwe, izixhobo ezikhethekileyo zokuvelisa iPCB zivelisa isubstrate yePCB ehlangabezana nemigangatho yokusetyenzwa kweSMT.
Intengiso (wonderfulchip.com)
Ukuthengwa kweCandelo kunye noHlolo
phambi kokuba Uqhubekeko lwe-SMT, amacandelo e-elektroniki afunekayo kufuneka athengwe kwaye ahlolwe ngqongqo. Eli nyathelo liqinisekisa ukuba umgangatho wecandelo uhlangabezana nemigangatho yokuvelisa, ukuphepha imiba ekuqhutyweni okulandelayo. Uhlolo lubandakanya ukusebenza kombane, inkangeleko, kunye nemilinganiselo.
Ukusetyenziswa kweNcama ye-Solder / i-Adhesive
Ukomeleza icandelo elincamatheleyo kwi-PCB, umaleko we-solder paste okanye i-adhesive inokufakwa. Eli nyathelo linceda amacandelo akhuselekileyo kwindawo, ukukhusela ukunyakaza okanye ukuchithwa ngexesha lokuqhubela phambili.
Ukukhetha kunye neNdawo yaMacandelo
Umatshini wokukhetha kunye nendawo sesinye sezixhobo eziphambili ekusetyenzweni kwe-SMT. Ifumana amacandelo avela kwi-feeders kwaye iwabeke ngokuchanekileyo kwi-PCB ngokolungelelwaniso olusetwe kwangaphambili. Ngethuba le nkqubo, umatshini usebenzisa i-high-precision positioning kunye neenkqubo zokuqaphela umbono ukuqinisekisa ukubekwa ngokuchanekileyo.
I-Soldering kwakhona
Emva kokubekwa, i-PCB edibeneyo (PCBA) ithunyelwa kwi-oven yokubuyisela kwakhona ukuze ifakwe. I-oven ilawula ngokuchanekileyo ubushushu kunye nokuhamba komoya ukunyibilikisa i-solder paste, iqinisekisa ukumanzisa okufanelekileyo kwecandelo elikhokelela kunye neepads ze-PCB, zenza uqhagamshelwano oluthembekileyo lwe-solder. Eli nyathelo libalulekile, lichaphazela ngqo umgangatho we-soldering.
Ukucoca kunye noHlolo
Nje ukuba i-soldering igqitywe, i-PCBA kufuneka icocwe ukususa intsalela ye-solder paste kunye ne-flux. Emva kokucoca, ukuhlolwa ngokucokisekileyo kuqhutywe, kubandakanywa ukuhlolwa okubonakalayo, ukuvavanywa kokusebenza kombane, kunye nokuvavanya ukuthembeka, ukuqinisekisa ukuba umgangatho wemveliso uhlangabezana nemigangatho.
Ukulungisa kunye nokuPakisha
Iimveliso ezichongiweyo njengezineziphene ngexesha lokuhlolwa zifuna ukulungiswa. Emva kokuba ukulungiswa kugqityiwe, omnye umjikelo wokuhlola uqinisekisa umgangatho. Ekugqibeleni, iimveliso ezifanelekileyo zipakishwe kwiintengiso ezilandelayo kunye nokuthunyelwa.
Iingqwalaselo kuLungiselelo lwe-SMT
Xa kuqhutywa inkqubo ye-SMT, le miba ilandelayo kufuneka iqwalaselwe:
Ulawulo lobushushu kunye nokufuma: Ukusetyenzwa kwe-SMT kufuna iimeko ezithile zokusingqongileyo. Ngokuqhelekileyo, amaqondo obushushu kufuneka agcinwe phakathi kwe-22-28 ° C, kwaye ukufuma kufuneka kugcinwe kwi-45% -70% ye-RH ukuqinisekisa ukuzinza kwenkqubo kunye nomgangatho wemveliso.
Izilumkiso zoMbane oNgqongileyo: Amalungu e-elektroniki anovelwano kumbane ongashukumiyo, ngoko ke imilinganiselo engqongqo ye-ESD (ukukhutshwa kombane) kufuneka iphunyezwe, njengokunxiba impahla echasene nokungashukumi kunye nokusebenzisa izitishi zokusebenzela ezingashukumiyo.
Ukugcinwa kwecandelo: Iimeko zokugcina zamacandelo nazo zichaphazela umgangatho wemveliso. Amalungu kufuneka agcinwe kwindawo eyomileyo, nengena moya ngaphandle kweegesi ezidliwayo ukuthintela ukufunxa ukufuma okanye i-oxidation.
Ukulungiswa kwezixhobo: Izixhobo zokulungisa ze-SMT ezifana noomatshini bokuchola kunye nendawo kunye nee-oveni zokuphinda ziphume zifuna ukulungiswa rhoqo ukuze kuqinisekiswe ukuchaneka, uzinzo, kunye nobomi obude.
Ukusetyenzwa kwe-SMT lubuchule obuntsonkothileyo nobuchanekileyo obubandakanya amanqanaba amaninzi kunye nezixhobo ezahlukeneyo. Kwabaqalayo, ukuqonda kunye nobuchule bokuhamba kobu buchwepheshe kubalulekile. Ngeli nqaku, abafundi bekufanele ukuba bazuze ukuqonda okubanzi Amanyathelo okucubungula e-SMT. Ukufunda ngokuqhubekayo kunye namava asebenzayo abalulekile ekuphuculeni umgangatho wokucubungula kunye nokusebenza kakuhle kwe-SMT.
