PCB impedance yog hais txog qhov tsis kam ntawm qhov tsis kam thiab reactance, uas plays lub luag haujlwm anobstruction hauv alternating tam sim no. Hauv pcb Circuit board ntau lawm, kev kho impedance yog qhov tseem ceeb. Yog li koj puas paub vim li cas PCB Circuit Board yuav tsum ua impedance?
1, PCB Circuit Court board hauv qab xav txog kev teeb tsa ntawm cov khoom siv hluav taws xob, hluav taws xob conductivity thiab cov teeb liab kis tau tus mob tom qab tso, yog li nws yuav xav tau qhov qis impedance, qhov zoo dua, qhov resistivity tsawg dua 1 × 10-6 ib square centimeter hauv qab no.
2, PCB Circuit Court board nyob rau hauv cov txheej txheem ntau lawm kom paub txog tooj liab sinking, tin plating (los yog electroless plating, los yog kub spray tin), solder pob qij txha thiab lwm yam txheej txheem ntau lawm txuas, thiab cov ntaub ntawv siv nyob rau hauv cov kev sib txuas yuav tsum xyuas kom meej tias cov resistivity hauv qab, kev txiav txim kom ntseeg tau tias tag nrho impedance ntawm PCB Circuit Court board yog tsawg kom tau raws li cov khoom yuav tsum tau zoo, muaj peev xwm ua hauj lwm ib txwm.
3, tinning ntawm PCB pawg thawj coj saib yog feem ntau muaj teeb meem nyob rau hauv zus tau tej cov tag nrho Circuit Court board, thiab nws yog qhov tseem ceeb txuas rau impedance. Qhov loj tshaj ntawm cov tshuaj tin plating txheej yog ib qho yooj yim discoloration (ob qho tib si yooj yim oxidation los yog delixing), tsis zoo brazing, uas yuav ua rau nyuaj welding ntawm Circuit Court board, siab impedance ua rau tsis zoo hluav taws xob conductivity los yog instability ntawm tag nrho cov board kev ua tau zoo.
4, PCB Circuit Court board nyob rau hauv tus neeg xyuas pib yuav muaj ntau yam teeb liab kis tau tus mob, thaum txhim kho nws cov kis tau tus mob thiab yuav tsum tau nce nws zaus, cov kab nws tus kheej yog etching, laminated thickness, hlau dav thiab lwm yam txawv, yuav ua rau impedance. yog tsim nyog hloov, thiaj li hais tias lub teeb liab distortion, ua rau lub board kev ua tau zoo poob, yog li koj yuav tsum tau tswj tus nqi impedance nyob rau hauv ib tug tej yam ntau yam.
