Los ntawm-qhov tsim hauv kev kub ceev PCB

Los ntawm-qhov tsim hauv kev kub ceev PCB

Nyob rau hauv kev kub ceev PCB tsim, qhov zoo li yooj yim lub qhov feem ntau ua rau muaj qhov tsis zoo rau kev tsim hluav taws xob.Hla-qhov (VIA) yog ib qho tseem ceeb tshaj plaws ntawmmultilayer PCB boards, thiab tus nqi ntawm drilling feem ntau yog 30% mus rau 40% ntawm PCB board nqi.Yooj yim muab, txhua qhov hauv PCB tuaj yeem raug hu ua qhov dhau-qhov.

Los ntawm qhov pom ntawm kev ua haujlwm, qhov tuaj yeem muab faib ua ob hom: ib qho yog siv rau kev sib txuas hluav taws xob ntawm cov khaubncaws sab nraud povtseg, lwm qhov yog siv rau kev kho cov cuab yeej lossis qhov chaw.Hais txog cov txheej txheem thev naus laus zis, cov qhov no feem ntau muab faib ua peb pawg, uas yog qhov muag tsis pom ntawm, cand through.

Txhawm rau txo qhov tsis zoo tshwm sim los ntawm cov kab mob parasitic ntawm lub pore, cov hauv qab no tuaj yeem ua kom deb li deb tau hauv kev tsim:

Xav txog tus nqi thiab cov teeb liab zoo, xaiv qhov tsim nyog qhov loj.Piv txwv li, rau 6-10 txheej nco module PCB tsim, nws yog qhov zoo dua los xaiv 10/20mil (lub qhov / ncoo) qhov.Rau qee lub rooj tsav xwm loj me me, koj tuaj yeem sim siv 8/18mil qhov.Nrog rau cov cuab yeej siv tam sim no, nws nyuaj rau siv me me perforations.Rau cov khoom siv hluav taws xob lossis hauv av xaim qhov tuaj yeem suav tias yog siv qhov loj me, kom txo qhov impedance.

Los ntawm ob cov qauv uas tau tham saum toj no, nws tuaj yeem xaus lus tias kev siv lub rooj tsav xwm PCB thinner yog qhov zoo los txo cov kab mob parasitic ntawm ob qhov pore.

Cov pins ntawm lub hwj huam mov thiab hauv av yuav tsum tau drilled nyob ze.Qhov luv luv cov coj ntawm cov pins thiab lub qhov, qhov zoo dua, vim lawv yuav ua rau muaj kev nce hauv inductance.Nyob rau tib lub sijhawm, cov khoom siv hluav taws xob thiab cov av hauv av yuav tsum yog tuab li ua tau kom txo qis impedance.

Lub teeb liab thaiv ntawm lubhigh-ceev PCB boardyuav tsum tsis txhob hloov cov khaubncaws sab nraud povtseg ntau li ntau tau, uas yog, kom txo qis qhov tsis tsim nyog.

Qee qhov hauv av tau muab tso rau ze ntawm lub qhov hauv cov teeb liab pauv txheej los muab lub voj kaw rau lub teeb liab.Koj tuaj yeem muab ntau qhov av ntxiv rau ntawm qhovPCB pawg thawj coj saib.Tau kawg, koj yuav tsum tau hloov pauv hauv koj tus qauv tsim.Tus qauv dhau ntawm qhov sib tham saum toj no muaj cov ntaub qhwv hauv txhua txheej.Qee zaum, peb tuaj yeem txo lossis txawm tias tshem cov ntaub qhwv hauv qee cov khaubncaws sab nraud povtseg.

Tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv ntawm cov pore loj heev, nws yuav ua rau tsim ib tug tawg zawj nyob rau hauv lub tooj liab txheej ntawm lub muab faib Circuit Court.Txhawm rau daws qhov teeb meem no, ntxiv rau kev txav txoj haujlwm ntawm qhov pore, peb tseem tuaj yeem txiav txim siab txo qhov loj ntawm cov ntaub qhwv hauv cov tooj liab txheej.

Yuav siv li cas tshaj qhov: Los ntawm kev soj ntsuam saum toj no ntawm cov kab mob parasitic ntawm tshaj qhov, peb tuaj yeem pom tias hauvhigh-ceev PCBtsim, zoo li yooj yim siv tsis raug ntawm qhov ntau dhau yuav ua rau muaj kev cuam tshuam loj heev rau kev tsim hluav taws xob.