FR-4, yog ib qho kev lees paub thoob ntiaj teb qib chaw rau fiberglass reinforced epoxy laminated uas yog nplaim hluav taws (self-extinguishing). Tom qab ntxiv ib txheej tooj liab ntawm ib los yog txhua sab ntawm lub fr4 qab, nws dhau los ua Copper Clad Laminate (CCL), thiab qhov no yog cov khoom siv uas tsis yog-conductive rau ib txwm luam tawm Circuit Board (PCB). Lub rooj tsav xwm luam tawm siv FR4 ua cov khoom tseem ceeb yuav raug hu ua"FR4 PCB".
Lub rooj tsavxwm fr4 PCB yog siv los txhawb kev siv tshuab thiab hluav taws xob txuas hluav taws xob siv cov khoom siv hluav taws xob, kev sib tw, lossis cov teeb liab kab etched los ntawm tooj liab-clad laminate substrate. Qee zaum, PCB tseem hu ua Printed Wiring Board (PWB) lossis etching wiring board yog tias tsis muaj cov khoom siv hluav taws xob ntxiv ntxiv.
Technology zoo tshaj plaws muab qhov zoo tshaj plaws fr4 board series muaj nyob rau hauv ntau hom thiab specifications. Tshuab zoo tshajfr4 ua ua tib zoo xaiv cov ntaub ntawv zoo. Qhov no ua rau peb tsim fr4 board uas muaj kev sib tw ntau dua li lwm cov khoom hauv kev lag luam. Nws muaj qhov zoo ntawm kev ua haujlwm sab hauv, tus nqi, thiab zoo.
Cov khoom siv thev naus laus zis zoo tshaj plaws muaj ntau yam khoom siv. Pebfr4 pcb ua them nyiaj zoo rau kev ncaj ncees thiab kev lag luam lub koob npe nrov. Peb nruj me ntsis tswj qhov zoo thiab cov nqi tsim khoom. Tag nrho cov no tau lees tias fr4 board yog qhov zoo-txhim kho thiab tus nqi-nyiam.