Ib prepreg (los ntawm pre-impregnated) yog fibreglass impregnated nrog resin. Cov resin yog pre-dried, tab sis tsis hardened, yog li ntawd thaum nws yog rhuab, nws ntws, sticks, thiab yog kiag li immersed. Prepregs yog li fiberglass ntxiv dag zog los ntawm ib txheej nplaum (zoo ib yam li FR4 khoom).
Dab tsi yog qhov tseem ceeb thiab prepreg hauv PCB?
Prepreg yog cov khoom siv dielectric uas yog sandwiched ntawm ob lub cores lossis nruab nrab ntawm cov tub ntxhais thiab cov ntawv ci tooj liab hauv PCB, los muab cov rwb thaiv tsev uas xav tau. Koj tuaj yeem hu nws ua cov khoom siv khi thiab. Nws yog khi ob cores los yog ib tug tub ntxhais thiab ib tug tooj liab ntawv ci. Qhov no ua lub luag haujlwm tseem ceeb hauv PCB tsim thiab tsim khoom.
Puas yog FR4 prepreg?
Lub prepreg thiab core yog ob qhov sib txawv ntawm PCB. Rau qhov pib, cov tub ntxhais yog cov khoom siv FR4 nrog cov kab tooj liab. Whereas, lub prepreg yog fiberglass impregnated nrog cob. Nws yog prepreg uas tuav lub hauv paus ua ke ntawm PCB.
prepreg thickness yog dab tsi?
Lub thickness ntawm cov tub ntxhais yog nyob rau hauv thaj tsam ntawm 0.1mm txog 0.3mm. Prepreg yog ib lo lus siv rau cov ntaub npuag uas tau ua ntej impregnated nrog cov txheej txheem resin. Cov kab ke no (feem ntau yog epoxy) twb suav nrog tus neeg saib xyuas kom raug.
tus qauv PCB thickness yog dab tsi?
Tus Txheej Txheem PCB Thickness yog dab tsi? Ntau cov tuam txhab cog lus yuav hais tias tus qauv PCB tuab yog 1.57 hli, lossis kwv yees li 0.062 hauv.
