Kupyolera mu dzenje kamangidwe mu liwiro mkulu PCB

Kupyolera mu dzenje kamangidwe mu liwiro mkulu PCB

Pamapangidwe othamanga kwambiri a PCB, dzenje lomwe limawoneka losavuta nthawi zambiri limabweretsa zoyipa pamapangidwe adera.Kupyolera-bowo (VIA) ndi chimodzi mwa zigawo zofunika kwambiri zamatabwa PCB multilayer, ndipo mtengo wakubowola nthawi zambiri umatengera 30% mpaka 40% ya mtengo wa PCB board.Mwachidule, dzenje lililonse mu PCB limatha kutchedwa bowo.

Kuchokera pakuwona ntchito, mabowo akhoza kugawidwa m'mitundu iwiri: imodzi imagwiritsidwa ntchito pogwirizanitsa magetsi pakati pa zigawo, ina imagwiritsidwa ntchito pokonza chipangizo kapena kuika.Pankhani yaukadaulo, mabowowa amagawidwa m'magulu atatu, akhungu kudzera, cand kudzera.

Pofuna kuchepetsa zotsatira zoyipa zomwe zimachitika chifukwa cha parasitic zotsatira za pore, zinthu zotsatirazi zitha kuchitika momwe zingathere popanga:

Poganizira za mtengo ndi khalidwe la chizindikiro, dzenje la kukula koyenera limasankhidwa.Mwachitsanzo, kwa 6-10 wosanjikiza kukumbukira gawo PCB kapangidwe, ndi bwino kusankha 10/20mil (dzenje / PAD) dzenje.Pa bolodi yaying'ono yokulirapo, mutha kuyesanso kugwiritsa ntchito dzenje la 8/18mil.Ndi zamakono zamakono, ndizovuta kugwiritsa ntchito ma perforations ang'onoang'ono.Pakuti magetsi kapena nthaka dzenje waya akhoza kuonedwa ntchito yaikulu kukula, kuchepetsa impedance.

Kuchokera pamapangidwe awiri omwe takambirana pamwambapa, tinganene kuti kugwiritsa ntchito bolodi la PCB laling'ono ndilopindulitsa kuchepetsa magawo awiri a parasitic a pore.

Zikhomo za magetsi ndi nthaka ziyenera kubowoleredwa pafupi.Njira zazifupi pakati pa zikhomo ndi mabowo, zimakhala bwino, chifukwa zidzatsogolera kuwonjezeka kwa inductance.Panthawi imodzimodziyo, mphamvu zamagetsi ndi zoyendetsa pansi ziyenera kukhala zazikulu momwe zingathere kuti muchepetse impedance.

Wiring chizindikiro pamkulu-liwiro PCB bolodisayenera kusintha zigawo momwe angathere, ndiko kuti, kuchepetsa mabowo osafunika.

Mabowo ena okhazikika amayikidwa pafupi ndi mabowo omwe amasinthitsa ma siginecha kuti apereke kuzungulira kwa chizindikirocho.Mutha kuyikanso mabowo ambiri owonjezera pamtundaChithunzi cha PCB.Zowona, muyenera kukhala osinthika pamapangidwe anu.Njira yodutsamo yomwe takambirana pamwambapa ili ndi mapepala pagawo lililonse.Nthawi zina, tikhoza kuchepetsa kapena kuchotsa mapepala mu zigawo zina.

Makamaka pankhani ya kachulukidwe kakang'ono ka pore, kungayambitse kupanga poyambira wosweka mumkuwa wosanjikiza wa dera logawa.Pofuna kuthetsa vutoli, kuwonjezera pa kusuntha malo a pore, tikhoza kuganiziranso kuchepetsa kukula kwa solder pad muzitsulo zamkuwa.

Momwe mungagwiritsire ntchito pamabowo: Kupyolera mu kusanthula kwapamwamba kwa mawonekedwe a parasitic a maenje, titha kuwona kutiPCB yothamanga kwambirikamangidwe, zooneka ngati zosavuta kugwiritsa ntchito molakwika pa mabowo nthawi zambiri kumabweretsa zotsatira zoipa pa kapangidwe dera.