Kufuneka senze ntoni phambi kwe-SMT ii-PCBs ngexesha lenkqubo yokudityaniswa kwe-PCB?
I-PCBFuture inefektri yokuhlanganisa i-smt, enokubonelela ngeenkonzo zendibano ye-SMT kweyona phakheji incinane 0201 amacandelo.Ixhasa iindlela ezahlukeneyo zokusetyenzwa njengeindibano PCB turnkeykunye neenkonzo ze-OEM ze-pcba.Ngoku, ndiza kukwazisa ukuba Loluphi uhlolo ekufuneka lwenziwe phambi koqhubekeko lwe-SMT PCB?
1.Ukuhlolwa kwamacandelo e-SMT
Izinto zokuhlola ziquka: i-solderability, i-pin coplanarity kunye nokusebenziseka, ekufuneka isampuliwe lisebe lokuhlola.Ukuvavanya i-solderability yamacandelo, sinokusebenzisa i-tweezers yensimbi engenasici ukunyanzelisa icandelo kunye nokuntywiliselwa kwisitya senkcenkce kwi-235±5℃ okanye i-230±5℃, kwaye siyikhuphe kwi-2±0.2s okanye i-3±0.5s.Kufuneka sihlolisise imeko yokuphela kwe-welding phantsi kwe-microscope ye-20x.Kufunwa ukuba ngaphezu kwe-90% yesiphelo se-welding samacandelo simanziswe nge-tin.
Ucweyo lwethu lwenkqubo ye-SMT luya kwenza uhlolo lwembonakalo engezantsi:
1.1 Sinokujonga iziphelo ze-welding okanye i-pin surfaces yamacandelo e-oxidation okanye ukungcola ngokubonakalayo okanye ngeglasi yokukhulisa.
1.2 Ixabiso legama, inkcazo, imodeli, ukuchaneka, kunye nemilinganiselo yangaphandle yamacandelo kufuneka ihambelane neemfuno ze-PCB.
1.3 Izikhonkwane ze-SOT kunye ne-SOIC azinakuguqulwa.Kwizixhobo ezininzi ze-QFP ezikhokelayo kunye ne-lead pitch engaphantsi kwe-0.65mm, i-coplanarity yezikhonkwane kufuneka ibe ngaphantsi kwe-0.1mm kwaye sinokuhlola ngokuhlolwa kwe-mounter optical.
1.4 Kwi-PCBA efuna ukucocwa kwi-SMT patch processing, amanqaku amacandelo makangawi emva kokucoca, kwaye akanakuchaphazela ukusebenza nokuthembeka kwamacandelo.Ukuba sinokuhlola okubonakalayo emva kokucoca.
2Ukuhlolwa kwePCB
2.1 Ipateni yomhlaba ye-PCB kunye nobukhulu, imaski ye-solder, isikrini sesilika, kunye nokuseta umngxuma kufuneka ihlangabezane neemfuno zoyilo lweebhodi zesekethe eziprintiweyo ze-SMT.Sinokujonga ukuba i-pad spacing ifanelekile, isikrini siprintwe kwi-pad, kwaye i-via yenziwe kwi-pad, njl.
2.2 Imilinganiselo yePCB kufuneka ihambelane, kwaye imilinganiselo, imingxuma yokubeka, kunye namanqaku okubhekisela kwi-PCB kufuneka ahlangabezane neemfuno zesixhobo somgca wemveliso.
2.3 PCB evumelekileyo ubungakanani bokugoba:
2.3.1 Phezulu / i-convex: ubuninzi be-0.2mm / 50mm ubude kunye nobuninzi be-0.5mm / ubude be-PCB yonke.
2.3.2 Ngaphantsi / i-concave: ubuninzi be-0.2mm / 50mm ubude kunye nobuninzi be-1.5mm / ubude be-PCB yonke.
2.3.3 Kufuneka sijonge ukuba i-PCB ingcolisekile okanye ifumile.
3Imigqaliselo yenkqubo ye-SMT PCB:
3.1 Igcisa linxiba iringi yombane ehloliweyo.Ngaphambi kweplagi-in, kufuneka sijonge amacandelo e-elektroniki oda ngalinye azikho iimpazamo / ukuxuba, umonakalo, ukuguqulwa, imikrwelo, njl.
3.2 I-plug-in board ye-PCB kufuneka ilungise izinto zombane kwangaphambili, kwaye uqaphele isalathiso se-capacitor polarity kufuneka sichaneke.
3.3 Emva kokuba umsebenzi woshicilelo we-SMT ugqityiwe, khangela iimveliso ezineziphene ezinjengokungafakwa, ukubuyisela umva, nokulungelelaniswa kakuhle, njl. njl., uze ubeke i-tin egqityiweyo i-PCB kwinkqubo elandelayo.
3.4 Nceda unxibe iringi yombane phambi kwe-SMT PCB ngexesha lenkqubo yokudityaniswa kwe-PCB.Icwecwe lesinyithi kufuneka libe kufuphi nesikhumba sesandla kwaye libekwe kakuhle.Sebenza ngokutshintshanayo ngezandla zombini.
3.5 Izinto zentsimbi ezifana ne-USB, i-IF socket, i-shielding cover, i-tuner kunye ne-terminal port yenethiwekhi kufuneka inxibe iibhedi zeminwe xa iplaga.
3.6 Indawo kunye nendlela alatha ngayo amacandelo mayichaneke.Amacandelo kufuneka abe tyaba ngokubhekiselele kumphezulu webhodi, kwaye amacandelo aphakamileyo kufuneka afakwe kwi-K foot.
3.7 Ukuba izinto eziphathekayo azihambelani neenkcukacha kwi-SOP kunye ne-BOM, mayaziswe i-monitor okanye inkokeli yeqela kwangexesha.
3.8 Izinto zokufunda maziphathwe ngobunono.Musa ukuqhubeka usebenzisa i-PCB enamalungu awonakeleyo, kwaye i-crystal oscillator ayinakusetyenziswa emva kokuba iwa.
3.9 Nceda ucoce kwaye ugcine indawo yokusebenza icocekile phambi kokuba usebenze kwaye uphume emsebenzini.
3.10 Ukuthobela ngokungqongqo imigaqo yokusebenza yendawo yokusebenza.I-PCB kwindawo yokuqala yokuhlola, indawo yokuhlolwa, indawo enesiphene, indawo yokugcina, kunye nommandla ophantsi wezinto eziphathekayo ongavumelekanga ukuba ube kwindawo engahleliwe.
4Kutheni ukhethe PCBFuture iinkonzo pcb indibano yakho?
4.1Isiqinisekiso samandla
4.1.1 Iworkshop: Inezixhobo eziphuma kumazwe angaphandle, ezinokuvelisa amanqaku ezigidi ezi-4 ngosuku.Inkqubo nganye ixhotyiswe nge-QC engakwazi ukugcina umgangatho we-PCB.
4.1.2 Umgca wokuvelisa we-DIP: Kukho oomatshini ababini bokuthengisa amaza, kwaye sinabasebenzi abangaphezu kweshumi abanamava abaneminyaka engaphezu kwemithathu yamava.Abasebenzi banezakhono eziphezulu kwaye bayakwazi ukuwelda izixhobo ezahlukeneyo zeplagi.
4.2Ukuqinisekiswa komgangatho, ixabiso eliphezulu elisebenzayo
4.2.1 Izixhobo ezikumgangatho ophezulu zinokuncamathisela iindawo ezinemilo echanekileyo, i-BGA, i-QFN, izixhobo ze-0201.Isenokusetyenziswa kwi patch isampuli kunye nokubeka imathiriyeli isambuku ngesandla.
4.2.2 Zombiniinkonzo yendibano yeprototype pcb, umthamo pcb ibandlaiinkonzo zinokubonelelwa.
4.3Amava atyebileyo kwi-SMT PCB kunye ne-soldering ye-PCB, kwaye lixesha lokuhambisa elizinzile.
4.3.1 Iinkonzo eziqokelelweyo kumawaka eenkampani ze-elektroniki, ezibandakanya inkonzo yendibano ye-SMT yeentlobo ngeentlobo zezixhobo zemoto kunye neebhodi zolawulo lwamashishini.Indibano yePCB kunye nePCB zithunyelwa eYurophu naseUnited States, kwaye umgangatho uqinisekiswa ngabathengi.
4.3.2 Ukuhanjiswa kwangexesha.Iintsuku ezi-3-5 eziqhelekileyo ukuba izixhobo zizalisekile kwaye zisombulule i-EQ, kunye neebhetshi ezincinci nazo zingathunyelwa ngosuku.
4.4Isakhono esinamandla sokulondolozwa kunye nenkonzo elungileyo emva kokuthengisa
4.4.1 Injineli yolondolozo inamava atyebileyo kwaye iyakwazi ukulungisa ii-PCB ezineziphene ezibangelwa zii-patch welding ezahlukeneyo.Sinokuqinisekisa izinga loqhagamshelwano lwePCB nganye.
4.4.2 Inkonzo yabathengi iya kuphendula ngeeyure ezingama-24 kwaye isombulule iingxaki zeodolo yakho ngokukhawuleza.
Ixesha lokuposa: Feb-28-2021