1. Cov khoom siv FR4 belongs rau fiberglass, thaum 3240 khoom belongs rau epoxy resin. Thiab FR4 muaj qhov kub thiab txias ua haujlwm zoo dua li 3240. Feem ntau, cov xim xim ntawm FR4 yog dej ntsuab, thaum cov xim xim ntawm 3240 yog xim daj.
2.Cov xim ntawm FR4 epoxy board yog ntuj heev, nrog me ntsis jade zoo li xav, thaum xim ntawm 3240 epoxy board yog me ntsis ntsais.
3.FR4 yog ib qho kev txhim kho ntawm 3240 epoxy board. Cov nplaim hluav taws ua haujlwm ntawm FR4 epoxy board ua tau raws li lub teb chaws UL94V-0 tus qauv. 3240 epoxy board tsis muaj nplaim hluav taws kub.
4. FR4 tuaj yeem muaj kev tua hluav taws thaum muaj hluav taws kub.
5. FR4 muaj qhov ruaj khov zoo dua li 3240, thiab thaum lub sij hawm nias, lub thickness kam rau ua kev tswj ntawm FR4 kuj zoo dua li 3240, ua rau nws tsim nyog rau kev ua.
6.3240 epoxy board yog halogenated thiab tsis zoo ib puag ncig rau ib puag ncig thiab tib neeg lub cev. Nws kuj tsis ua raws li lub teb chaws lub tswv yim ntsuab thiab kev txhim kho kom ruaj khov. Qhov txawv yog qhov tseeb rau FR4 epoxy board.
