12 Txheej FR4 ENIG Impedance Control PCB
Vim li cas PCB boards xav tau impedance?
1. PCB Circuit BoardTxhawm rau txiav txim siab qhov ntxig thiab kev teeb tsa ntawm cov khoom siv hluav taws xob, tom qab SMT thaj ntxig ntxig kuj yuav tsum xav txog cov khoom siv hluav taws xob thiab cov teeb liab kis tau tus mob thiab lwm yam teeb meem, yog li nws yuav xav tau qhov impedance kom tsawg li sai tau.
2. PCB Circuit Court board nyob rau hauv cov txheej txheem ntawm tooj liab deposition, tin plating (los yog electroless plating, kub tshuaj tsuag tin), soldering thiab lwm yam txheej txheem, cov ntaub ntawv siv yuav tsum tau tsawg resistivity, kom ntseeg tau tias tag nrho impedance tus nqi ntawm lub Circuit Court board rau ua tau raws li qhov yuav tsum tau ua ntawm cov khoom zoo, thiaj li ua haujlwm tau zoo.
3. PCB Circuit Court board tin plating yog feem ntau muaj teeb meem nyob rau hauv tag nrho Circuit Court board ntau lawm, yog qhov tseem ceeb txuas cuam tshuam rau impedance;Nws qhov loj tshaj qhov tsis xws luag yog yooj yim oxidation los yog deliquescence, tsis zoo brazing, kom lub Circuit Court board nyuaj rau solder, impedance siab dhau lawm, ua rau tsis zoo conductivity los yog tsis ruaj tsis khov kev ua tau zoo ntawm tag nrho cov board.
4. Tus neeg xyuas pib hauv PCB Circuit Board yuav muaj ntau yam teeb liab kis tau tus mob, kab nws tus kheej vim etching, laminate thickness, hlau dav thiab lwm yam, yuav ua rau impedance tus nqi hloov, ua rau lub teeb liab distortion, ua rau kev ua tau zoo ntawm lub Circuit Court board poob, yog li nws yog tsim nyog los tswj cov impedance tus nqi nyob rau hauv ib tug tej yam ntau yam.
