1. Ubungakanani bePCB
[Ingcaciso yangasemva] Ubungakanani bePCB bukhawulelwe ngumthamo wezixhobo zomgca wokuvelisa ngombane. Ngoko ke, ubungakanani obufanelekileyo bePCB kufuneka buqwalaselwe xa kuyilwa isikimu senkqubo yemveliso.
(1) Ubukhulu be-PCB ubukhulu obunokufakwa kwisixhobo se-SMT buvela kubungakanani obuqhelekileyo bezinto zePCB, uninzi lwazo ziyi-20″×24″, oko kukuthi, 508mm×610mm (ububanzi besiporo)
(2) Ubungakanani obucetyiswayo bubukhulu obuhambelana nesixhobo somgca wokuvelisa we-SMT, ohambelana nokusebenza kakuhle kwemveliso yesixhobo ngasinye kunye nokuphelisa ibhotile yesixhobo.
(3) Ubungakanani obuncinci bePCB kufuneka iyilwe njengento yokunyanzeliswa yokuphucula ukusebenza kakuhle kwemveliso yomgca wonke wemveliso.
【Iimfuno zoyilo】
(1) Ngokuqhelekileyo, ubukhulu besayizi ye-PCB kufuneka bulinganiselwe phakathi koluhlu lwe-460mm×610mm.
(2) Uluhlu lobungakanani obucetyiswayo (200 ~ 250)mm×(250~350)mm, kwaye umyinge womlinganiselo kufuneka ube “2.
(3) Ubungakanani bePCB “125mm×125mm, iPCB kufuneka imiselwe ubungakanani obufanelekileyo.
2, imilo yePCB
[Inkcazo yangasemva] Izixhobo zemveliso ye-SMT zisebenzisa ii-rail zesikhokelo ukudlulisa ii-PCB, kwaye azikwazi ukudlulisela ii-PCB ezimile ngendlela engaqhelekanga, ngakumbi ii-PCB ezinezikhewu ezikoneni.
【Iimfuno zoyilo】
(1) Imilo yePCB kufuneka ibe sisikwere esiqhelekileyo esineekona ezingqukuva.
(2) Ukuze kuqinisekiswe uzinzo lwenkqubo yothumelo, imilo engafanelekanga yePCB kufuneka ithathelwe ingqalelo ukuba iguqulwe ibe sisikwere esisemgangathweni ngokubekwa, ngakumbi izikhewu zembombo kufuneka zizaliswe ukuze kuthintelwe inkqubo yokuhambisa. wave soldering imihlathi Ibhodi yekhadi.
(3) Kwiibhodi ze-SMT ezicocekileyo, izikhewu zivumelekile, kodwa ubukhulu besithuba kufuneka bube ngaphantsi kwesinye kwisithathu sobude becala apho likhoyo. Ukuba idlula le mfuneko, icala lenkqubo yoyilo kufuneka lizaliswe.
(4) Ukongeza kuyilo olunomtsalane lwecala elifakayo, uyilo olunomtsalane lomnwe wegolide kufuneka luyilwe ngo (1~1.5)×45° ngokurhabaxa kumacala omabini ebhodi ukuze kube lula ukufaka.
3. Icala lothumelo
[Inkcazo yangasemva] Ubungakanani becala lokuhambisa buxhomekeke kwiimfuno zesikhokelo sokuhambisa isixhobo. Oomatshini bokushicilela, oomatshini bokubeka kunye neziko lokuphinda lifakwe kwi-solder lifuna ukuba icala lokuhambisa libe ngaphezulu kwe-3.5mm.
【Iimfuno zoyilo】
(1) Ukuze kuncitshiswe i-deformation ye-PCB ngexesha le-soldering, icala elide le-PCB elingamiselwanga lisetyenziswa ngokubanzi njengesikhokelo sothumelo; yokubekwa PCB, icala elide icala kufuneka kwakhona isetyenziswe njengoko ulwalathiso transmission.
(2) Ngokuqhelekileyo, amacala amabini e-PCB okanye ulwalathiso lokuhambisa lusetyenziswa njengecala lothumelo. Ubuncinci ububanzi becala lothumelo yi-5.0mm. Akufunekanga kubekho iinxalenye okanye ii-solder joints ngaphambili nangasemva kwicala lothumelo.
(3) Icala elingathumeli, akukho sithintelo kwisixhobo se-SMT, kungcono ukugcina indawo engavumelekanga ye-2.5mm.
4, umngxuma wokumisa
[Inkcazelo yangasemva] Iinkqubo ezininzi ezinjengokusetyenzwa, ukudityaniswa, kunye novavanyo zifuna ukubekwa okuchanekileyo kwePCB. Ke ngoko, kuyafuneka ngokubanzi ukuyila imingxunya yokubeka.
【Iimfuno zoyilo】
(1) Kwi-PCB nganye, ubuncinane kufuneka kuyilwe imingxunya emibini yokumisa, enye ibe setyhula kwaye enye ibe yimilo yegroove ende, eyokuqala isetyenziselwa ukubeka kwaye le yokugqibela isetyenziselwa ukukhokela.
Akukho mfuneko ikhethekileyo yokuvula indawo yokubeka indawo, inokuyilwa ngokweenkcukacha zefektri yakho, kwaye ububanzi obucetyiswayo yi-2.4mm kunye ne-3.0mm.
Imingxunya yokubeka kufuneka ibe yimingxuma engeyiyo isinyithi. Ukuba i-PCB yi-PCB ehlatyiweyo, umngxuma wokumisa kufuneka uyilwe ngepleyiti yomngxuma ukuqinisa ubulukhuni.
Ubude bomngxuma wesikhokelo ngokuqhelekileyo ngamaxesha angama-2 ububanzi.
Umbindi womngxuma wokumisa kufuneka ube ngaphezu kwe-5.0mm ukusuka kumda wokuhambisa, kwaye imingxuma emibini yokumisa kufuneka ibe kude kangangoko kunokwenzeka. Kuyacetyiswa ukuba uzilungiselele kwikona echasene nePCB.
2 isetyenziselwa itreyi yeplagi.
5. Isimboli yokuma
[Inkcazelo yangasemva] Oomatshini bokubekwa banamhlanje, oomatshini bokushicilela, izixhobo zokuhlola amehlo (AOI), izixhobo zokuhlola uncamathiselo lwe-solder (SPI), njl. Ke ngoko, iisimboli zokubeka i-optical kufuneka ziyilwe kwiPCB.
【Iimfuno zoyilo】
(1) Iisimboli zokumisa zahlulwe zaba ziisimboli zokuma zehlabathi (i-Global Fiducial) kunye neempawu zendawo (i-Local Fiducial). Eyangaphambili isetyenziselwa ukubeka ibhodi yonke, kwaye le yokugqibela isetyenziselwa ukubeka iibhodi ezisezantsi okanye izakhi zepitch-pitch.
2 Ngokuqhelekileyo, kucetyiswa ukuyila i-Ø1.0m ejikelezileyo yenkcazo yobhedu. Ukuthathela ingqalelo ukungafani phakathi kombala wezinto eziphathekayo kunye nokusingqongileyo, shiya indawo engeyiyo i-soldering 1mm enkulu kunophawu lokubeka optical. Akukho zimpawu zivumelekileyo ngaphakathi. Ezintathu kwibhodi enye Ubukho okanye ukungabikho kwe-foil yobhedu kwinqanaba elingaphakathi phantsi kwesimboli ngasinye kufuneka lihambelane.
(3) Kumphezulu we-PCB onamalungu e-SMD, kuyacetyiswa ukuba ubeke iisimboli ezintathu zokubeka i-optical kwiikona zebhodi ukuze kubekwe i-PCB ene-dimensional-dimensional (amanqaku amathathu amisela inqwelomoya, enokubona ubukhulu besolder. coma).
(4) Ukubekwa, ukongeza kwiisimboli ezintathu zokubeka ukukhanya kwibhodi yonke, kungcono ukuyila iisimboli ezimbini okanye ezintathu zokubeka i-optical positioning kwiikona ze-diagonal zeyunithi yebhodi nganye.
(5) Kwizixhobo ezifana ne-QFP kunye nomgama weziko elikhokelayo ≤0.5mm kunye ne-BGA enomgama ophakathi ≤0.8mm, iimpawu zendawo yokubeka i-optical positioning kufuneka zibekwe kwiikona ze-diagonal ukuze zibekwe ngokuchanekileyo.
(6) Ukuba kukho amacandelo axhonyiweyo kumacala omabini, kufuneka kubekho iisimboli zokuma kwicala ngalinye.
(7) Ukuba akukho mngxuma wokumisa kwiPCB, umbindi wesimboli yokuma yamehlo kufuneka ube ngaphezu kwe-6.5mm kude nomphetho wothumelo wePCB. Ukuba kukho umngxuma wokumisa kwi-PCB, umbindi wesimboli yokubeka i-optical kufuneka uyilwe kwicala lomngxuma wokumisa kufutshane nombindi we-PCB.