Lub Rooj Tswjhwm Saib Circuit Court Board (PCB) yog lub hauv paus txheej txheem uas nyob hauv tsev thiab sib cuam tshuam cov khoom siv hluav taws xob. Ua raws li "lub hlwb" ntawm lub cev, nws txuas ntau yam khoom ua ke kom muaj ntau yam haujlwm. Koj tuaj yeem ntsib PCBs hu ua Printed Circuit Assemblies (PCA) lossis Circuit Card Assemblies (CCA).
PCBs yog ubiquitous nyob rau hauv niaj hnub technology. Lawv suav nrog qhov sib txawv hauv kev siv thev naus laus zis: kev txhim kho cov tshuab uas xa cov kev ua tau zoo dua thaum nyob hauv qhov chaw tsawg dua. Txawm hais tias PCB qhov ntev sib txawv, lawv feem ntau siv cov cuab yeej cuab tam tsawg dua hauv cov khoom tsim piv rau lwm hom kev siv hluav taws xob. Qhov chaw no - txuag peev xwm yog ib qho ntawm qhov zoo tshaj plaws thiab cov ntsiab lus muag tseem ceeb ntawm PCBs hauv kev tsim cov khoom lag luam niaj hnub no.
Lwm tus yam ntxwv tseem ceeb ntawm PCBs yog lawv qhov hloov tau. Ua tsaug rau cov qauv ntawm lawv cov qauv, PCBs tuaj yeem hloov kho kom haum rau cov kev siv tshwj xeeb, yog li ua kom muaj qhov dav dav ntawm kev ua haujlwm. Thaum kawg, PCBs ua haujlwm rau kev sib txuas hluav taws xob hauv hluav taws xob, siv hluav taws xob ntau yam khoom siv hluav taws xob-xws li lub xov tooj ntawm tes mus rau cov tshuab ua lag luam- raws li peb cia siab rau niaj hnub no. (Qhov tseem ceeb, ntau- txheej PCBs tuaj yeem txhawb nqa cov kab hluav taws xob ntau dua, ua tau raws li qhov xav tau ntawm siab - teeb liab kis tau tus mob.)
