Nakuphi na ukuphazamisana phakathi kwephini lokubeka iqhosha lokuchukumisa ukukhanya kunye nomngxuma wokumisa we-PCB kuyakuchaphazela inkqubo yayo yokunyusela ye-SMT.Ukuba ukunyamezela ukunyamezela kubaluleke kakhulu, kuya kubakho umngcipheko othile woxinzelelo lwemishini.Ngohlalutyo lokunyamezelana kwengqokelela yephini lokubeka isitshixo esikhanyayo kunye nomngxuma wokumisa wePCB, ubuncinci bokukhutshwa phakathi kwephini lokumisa kunye nomngxuma wokumisa kubalwa. ukuba -0.063mm, oko kukuthi, kukho ukuphazamiseka okuncinci.Ke ngoko, kukho umngcipheko wokuba isikhonkwane sokubeka isitshixo sokucofa ukukhanya asikwazi ukufakwa kwi-PCB yokubeka indawo kakuhle ngexesha lokunyuswa kwe-SMT.Iimeko ezimbi kakhulu zinokubonwa ngokuhlolwa okubonakalayo ngaphambi kokuphinda kufakwe i-soldering.Iziphene ezincinci ziyakushiyelwa kwinkqubo elandelayo kwaye ziya kubangela uxinzelelo lomatshini.Ngokuhambelana nohlalutyo lwe-Root Square Sum, izinga elingalunganga laliyi-7153PPM. 
Kucetyiswa ukuba utshintshe ubungakanani kunye nokunyamezela komngxuma wokumisa we-PCB ukusuka kwi-0.7mm +/ -0.05mm ukuya ku-0.8mm +/ -0.05mm.Uhlalutyo lokuqokelelwa konyamezelo lwenziwa kwakhona kwiskim esiphuculweyo.Iziphumo zibonisa ukuba ubuncinci bokucoceka phakathi kwekholomu yokumisa kunye nomngxuma wokumisa ngu-0.037mm, kwaye umngcipheko wokuphazamiseka uyapheliswa.
Ixesha lokuposa: Aug-18-2021
