Lub rooj tsavxwm no siv cov ntaub fiberglass los ua kev txhawb zog, epoxy resin ua cov nplaum, thiab cov txheej txheem tooj liab yog siv rau saum npoo los ntawm cov txheej txheem tooj liab -clad, tsim cov qauv ntawm lub rooj tsavxwm. Kev siv dav ntawm FR4 PCBs hauv cov khoom siv hluav taws xob feem ntau yog vim lawv cov yam ntxwv ua tau zoo.
FR4 PCBs npog yuav luag txhua qhov chaw ntawm cov khoom siv hluav taws xob. Txawm hais tias nws yog cov neeg siv khoom siv hluav taws xob xws li xov tooj ntawm tes, khoos phis tawj, thiab ntsiav tshuaj, lossis cov cuab yeej tswj kev lag luam, cov khoom siv sib txuas lus, thiab cov khoom siv hluav taws xob hauv tsheb, txhua tus cia siab rau FR4 PCBs. Raws li lub substrate ntawm lub rooj tsavxwm Circuit Court, nws txhawb kev txhim kho thiab kev sib txuas ntawm ntau yam khoom siv hluav taws xob thiab yog ib feem tseem ceeb rau kev ua haujlwm ntawm cov khoom siv hluav taws xob.