Backplane PCB kev tsim tawm tau ua haujlwm tshwj xeeb ntawm cov khoom lag luam. Rov qab tuab dua li cov pa PCB pawg thawj coj thiab hnyav, thiab raws li nws cov peev xwm ua kom sov kuj tseem loj dua .Backplane PCB feem ntau hais txog kev ua cov ntawv luam tawm loj dua uas siv los ua cov kab rov tav rau kev txuas ob peb txheej PCB ua ke kom thaum kawg ua lub computer tsheb npav. Feem ntau, lawv tsis muaj cov khoom siv nquag; tab sis, lawv ua qhov chaw sib txuas ntawm cov haujlwm ua haujlwm PCBs. Backplane PCBs feem ntau ua ke nrog ntau yam ntawm cov nta suav nrog qhov muag tsis pom / faus vias, cov khoom siv ceev nrawm / high-ceev, thim rov qab, lub ntsej muag txee, lub ntsej muag muaj qhov sib piv thiab qhov cuam tshuam tswj tau. Backplane PCB feem ntau yog siv Cov Kev Siv Hluav Taws Xob Luam Tawm kuj tau siv hauv minicomputers thiab kev cia siab rau kev siv.