01
Kutheni iphazili
Emva kokuba ibhodi yesekethe yenziwe, umgca wendibano ye-SMT patch kufuneka udityaniswe kumacandelo.Ifektri nganye yokucwangcisa i-SMT iya kuchaza ubungakanani obufanelekileyo bebhodi yesekethe ngokweemfuno zokulungiswa komgca wendibano.Ngokomzekelo, ubungakanani buncinci okanye bukhulu kakhulu, kwaye umgca wendibano uhleliwe.Isixhobo sebhodi yesekethe ayinakulungiswa.Ngoko ke umbuzo ngulo, sifanele senze ntoni ukuba ubungakanani bebhodi yethu yesekethe ngokwayo buncinane kunobukhulu obuchazwe ngumzi-mveliso?Oko kukuthi, kufuneka sihlanganise ibhodi yesekethe kwaye sibeke iibhodi zeesekethe ezininzi kwisiqwenga esinye.Ukubekwa kunokuphucula ngokubonakalayo ukusebenza kakuhle kwabo bobabini oomatshini bokubekwa ngesantya esiphezulu kunye ne-wave soldering.
02
Uluhlu lwamagama
Ngaphambi kokuba uchaze indlela yokusebenza ngokweenkcukacha ngezantsi, qala uchaze amagama ambalwa abalulekileyo
Inqaku lamanqaku: njengoko kubonisiwe kuMfanekiso 2.1,
Isetyenziselwa ukunceda ukubekwa kwe-optical kumatshini wokubeka.Ubuncinci kukho iireferensi ezimbini ze-asymmetric kwi-diagonal yebhodi ye-PCB enesixhobo sokuvala.Amanqaku esalathiso sokubekwa kwe-optical yePCB iyonke akwindawo ehambelanayo kwidiagonal yePCB yonke;i-optical positioning ye-PCB eyahluliweyo Indawo yereferensi ngokuqhelekileyo ikwindawo ehambelanayo kwi-diagonal ye-sub-block PCB;ye-QFP (i-quad flat package) ene-lead pitch ≤0.5mm kunye ne-BGA (i-ball grid array package) kunye ne-pitch yebhola ≤0.8mm, ukuze kuphuculwe ukuchaneka kokubekwa, kuyafuneka Seta indawo yesalathiso kwiikona ezimbini ezichaseneyo. i-IC
Iimfuno zeBenchmark:
a.Ubume obukhethiweyo bendawo yokubhekisela sisangqa esiqinileyo;
b.Ubungakanani bendawo yesalathiso yi-1.0 +0.05mm ububanzi
c.Indawo yesalathiso ibekwe ngaphakathi koluhlu lwePCB olusebenzayo, kwaye umgama ophakathi mkhulu kune-6mm ukusuka kumda webhodi;
d.Ukuze kuqinisekiswe isiphumo sokuqatshelwa koshicilelo kunye nokuchwethezwa, akufuneki kubekho ezinye iimpawu zesilika-screen, iipads, V-grooves, imingxuma yesitampu, izithuba zebhodi yePCB kunye neengcingo ngaphakathi kwe-2mm kufuphi nomda we-fiducial mark;
e.Iphedi yereferensi kunye nemaski ye-solder ibekwe ngokuchanekileyo.
Ukuqwalasela umahluko phakathi kombala wezinto eziphathekayo kunye nokusingqongileyo, shiya indawo engabonakaliyo kwi-1 mm enkulu kunesimboli sokujonga i-optical positioning, kwaye akukho zimpawu zivunyelwe.Akuyimfuneko ukuyila indandatho yokukhusela isinyithi ngaphandle kwendawo engabonakaliyo.