Ntawm (VIA), qhov no yog ib lub qhov uas siv los ua los yog txuas tooj liab cov kab ntawm cov qauv coj hauv cov txheej txheem sib txawv ntawm lub rooj tsavxwm. Piv txwv li (xws li qhov qhov muag tsis pom kev, qhov faus), tab sis tsis tuaj yeem ntxig cov khoom coj los yog tooj liab-plated qhov ntawm lwm cov khoom siv ntxiv. Vim hais tias PCB yog tsim los ntawm tsub zuj zuj ntawm ntau copper foil txheej, txhua txheej ntawm tooj liab ntawv ci yuav tsum tau them nrog ib tug insulating txheej, yog li ntawd cov tooj liab ntawv ci txheej tsis tau sib txuas lus nrog ib leeg, thiab cov teeb liab txuas nyob rau ntawm lub qhov (ntawm ), yog li ntawd muaj lub npe Suav ntawm.
Cov yam ntxwv yog: txhawm rau ua kom tau raws li qhov xav tau ntawm cov neeg siv khoom, los ntawm qhov ntawm lub rooj tsav xwm Circuit Court yuav tsum tau ntim nrog qhov. Nyob rau hauv txoj kev no, nyob rau hauv tus txheej txheem ntawm kev hloov cov tsoos txhuas plug qhov txheej txheem, ib tug dawb mesh yog siv los ua kom tiav cov solder daim npog qhov ncauj thiab ntsaws qhov nyob rau hauv lub Circuit Court board kom cov khoom ruaj khov. Qhov zoo yog txhim khu kev qha thiab daim ntawv thov yog zoo meej dua. Vias feem ntau ua si lub luag haujlwm ntawm kev sib txuas thiab kev ua haujlwm ntawm circuits. Nrog rau kev loj hlob sai ntawm kev lag luam hluav taws xob, cov kev xav tau siab dua kuj tau muab tso rau hauv cov txheej txheem thiab nto mount thev naus laus zis ntawm cov ntawv luam tawm Circuit Board. Cov txheej txheem ntawm kev ntsaws ntawm lub qhov yog thov, thiab cov kev cai hauv qab no yuav tsum tau ua raws tib lub sijhawm: 1. Muaj tooj liab nyob rau hauv lub qhov ntawm lub qhov, thiab lub npog ntsej muag tuaj yeem ntsaws lossis tsis tau. 2. Yuav tsum muaj cov tin thiab txhuas nyob rau hauv lub qhov, thiab yuav tsum muaj ib tug tej thickness (4um) uas tsis muaj solder daim npog qhov ncauj number case tuaj yeem nkag mus rau hauv lub qhov, ua rau cov tin hlaws zais hauv lub qhov. 3. Lub qhov los ntawm lub qhov yuav tsum muaj lub ntsej muag lub ntsej muag ntsaws lub qhov, opaque, thiab yuav tsum tsis txhob muaj tin rings, tin hlaws, thiab yuav tsum tau flatness.
Qhov qhov muag tsis pom kev: Nws yog txhawm rau txuas cov kab hluav taws xob sab nraud hauv PCB nrog cov txheej sab hauv uas nyob ib sab los ntawm plating qhov. Vim hais tias sab nraud tsis tuaj yeem pom, nws hu ua qhov muag tsis pom. Nyob rau tib lub sijhawm, txhawm rau txhawm rau nce qhov chaw siv ntawm PCB cov khaubncaws sab nraud povtseg, qhov muag tsis pom kev siv. Ntawd yog, ib qho ntawm qhov mus rau ib qho chaw ntawm cov ntawv luam tawm.
Nta: Qhov muag tsis pom qhov nyob rau saum thiab hauv qab ntawm lub rooj tsav xwm Circuit Court nrog ib qho tob. Lawv yog siv los txuas cov kab saum npoo thiab cov kab hauv qab. Qhov tob ntawm lub qhov feem ntau tsis tshaj ib qho piv txwv (aperture). Txoj kev tsim khoom no yuav tsum tau ua tib zoo saib xyuas qhov tob ntawm qhov drilling (Z axis) kom raug. Yog tias koj tsis xyuam xim, nws yuav ua rau muaj teeb meem hauv electroplating hauv lub qhov, yog li yuav luag tsis muaj lub Hoobkas txais nws. Nws kuj tseem tuaj yeem tso cov txheej txheej hauv Circuit Court uas yuav tsum tau txuas ua ntej hauv cov txheej txheem ntawm tus kheej. Lub qhov yog drilled ua ntej, thiab tom qab ntawd glued ua ke, tab sis yuav tsum muaj ntau qhov chaw thiab cov khoom sib dhos yuav tsum tau ua.
faus vias yog kev sib txuas ntawm cov txheej txheej hauv Circuit Court hauv PCB tab sis tsis txuas nrog cov txheej txheej sab nrauv, thiab tseem txhais tau tias ntawm qhov uas tsis txuas mus rau saum npoo ntawm lub rooj tsav xwm Circuit Court.
Nta: Cov txheej txheem no tsis tuaj yeem ua tiav los ntawm kev drilling tom qab kev sib txuas. Nws yuav tsum tau drilled thaum lub sij hawm ntawm ib tug neeg Circuit Court txheej. Ua ntej, txheej txheej sab hauv yog ib feem sib koom ua ke thiab tom qab ntawd electroplated ua ntej. Thaum kawg, nws tuaj yeem ua tiav tag nrho, uas yog qhov ua tau zoo dua li qhov qub. Qhov qhov thiab qhov muag tsis pom kev siv sijhawm ntau dua, yog li tus nqi yog qhov kim tshaj plaws. Cov txheej txheem no feem ntau tsuas yog siv rau high-density Circuit Court boards kom nce qhov chaw siv tau ntawm lwm cov txheej hauv Circuit Court
Hauv cov txheej txheem tsim khoom PCB, qhov drilling yog qhov tseem ceeb heev, tsis muaj kev saib xyuas. Vim hais tias qhov drilling yog txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau nws nws yog qhov yuav tsum tau tho qhov qhov yuav tsum tau ua los ntawm cov qhov ntawm cov tooj liab clad board los muab kev sib txuas hluav taws xob thiab txhim kho cov haujlwm ntawm lub cuab yeej. Yog tias kev ua haujlwm tsis raug, yuav muaj teeb meem hauv cov txheej txheem ntawm cov qhov, thiab cov cuab yeej tsis tuaj yeem kho ntawm lub rooj tsav xwm Circuit Court, uas yuav cuam tshuam rau kev siv, thiab tag nrho lub rooj tsavxwm yuav raug muab pov tseg, yog li cov txheej txheem drilling tseem ceeb heev.