Ngokubanzi, imveliso yePCB ibizwa ngokuba yiPaneli yokwandisa ukusebenza komgca wemveliso ye-SMT. Zeziphi iinkcukacha ekufuneka zithathelwe ingqalelo kwi Indibano PCB? Makhe sijonge.

1. Isakhelo sebhodi ye-PCB (ukubotshwa komphetho) kufuneka yamkele uyilo oluvaliweyo-loop ukuqinisekisa ukuba ibhodi ye-PCB ayizukukhubazeka emva kokuba ilungisiwe kulungelelwaniso;

2, ibhodi PCB imilo kufutshane kangangoko isikwere, kucetyiswa 2 × 2, 3 × 3 …… IJigsaw, kodwa hayi kwibhodi yeYin kunye neYang;

3, ububanzi bebhodi ye-PCB ≤260mm (umgca we-SIEMENS) okanye ≤300mm (umgca we-FUJI); Ukuba yokuhambisa oluzenzekelayo kuyafuneka, ububanzi × ubude ibhodi PCB ≤125mm × 180mm;

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5, umgama osembindini phakathi kolawulo lweplate encinci phakathi kwe-75mm ~ 145mm;

6, xa useta indawo ekubekwa kuyo ireferensi, ihlala kwindawo yokumisela ejikeleze indawo ye-welding evulekileyo eyi-1.5mm enkulu kunayo;

7. Makungabikho sixhobo sikhulu okanye isixhobo esandisiweyo kufutshane nendawo yokudibanisa phakathi kwesakhelo sangaphandle kunye nembasa encinci yangaphakathi, kunye nomphetho wamacandelo kunye nebhodi yePCB kufuneka ibenendawo enkulu kune-0.5mm ukuqinisekisa ukusebenza kwesiqhelo isixhobo sokusika;

8. Kuvulwa imingxuma emine yokuma kweekona ezine zesakhelo sebhodi, kunye nomngxuma we-4mm ± 0.01mm; Amandla omngxunya kufuneka abe ngcathu ukuqinisekisa ukuba ayizukuqhekeka kwinkqubo yamacwecwe aphezulu nasezantsi; Ukubeka kunye nokuchaneka kwendawo ukuba ibe phezulu, udonga lomngxunya olugudileyo ngaphandle kwe-burr;

9. Ngokomgaqo, i-QFP enesithuba esingaphantsi kwe-0.65mm iya kubekwa kwindawo edibeneyo yesimboli yereferensi ye-PCB yokuma kwebhodi yonke kunye nokubeka isixhobo esifanelekileyo; Iimpawu zokubekwa kwedatha kwiibhodi ezisezantsi zePCB kufuneka zisetyenziswe ngababini kwaye zicwangciswe kwidayagonal yezinto zokubeka;

10, izinto ezinkulu kufuneka zibeke iikholamu okanye imingxunya yokuma, ezinje nge-I / O ujongano, imakrofoni, ujongano lwebhetri, utshintsho oluncinci, ujongano lwentloko, iimoto, njl.