6 Layer FR4 ENIG Impedance Control PCB
Sei PCB Kuita Impedance?
PCB impedance inoreva kupokana uye ma paramita eiyo reactance, iyo inoshanda sechipingamupinyi kune alternating ikozvino.Impedance processing yakakosha muPCB.Heino chikonzero:
1, PCB yekufunga nezve kuisirwa plug yemagetsi emagetsi, SMT chigamba plug inodawo kufunga nezve conductivity uye chiratidzo chekufambisa kwekuita, saka zvinoda kudzika iyo impedance, zviri nani.
2, PCB mukugadzira nzira kuburikidza nemhangura deposition, electroplating tin (kana electroless plating, inopisa pfapfaidzo tin), connector soldering uye mamwe maitiro, zvinhu zvinoshandiswa zvinofanirwa kuve zvakaderera resistivity, kuve nechokwadi chekuti iyo yese impedance kukosha kwedunhu bhodhi kusangana. zvinodiwa zvemhando yechigadzirwa, kuitira kuti ishande yakajairika.
3, PCB tin plating ndiyo inonyanya kutarisana nezvinetso mukugadzirwa kwePCB yose, ndiyo yakakosha link inobata impedance;Kukanganisa kwayo kukuru ndeye nyore oxidation kana deliquesce, kushambidzika kwakashata, kuitira kuti PCB inonetsa kupinza, impedance yakakwira zvakanyanya, zvichikonzera kusaita zvakanaka kwekuita kana kuti PCB yese kuita haina kugadzikana.
4, kondakita muPCB ichange iine akasiyana-siyana ekufambisa kwemasaini, iyo mutsara pachayo nekuda kwe etching, lamination ukobvu, waya upamhi uye zvimwe zvinhu, zvinokonzeresa shanduko kukosha kweiyo impedance, kuita chiratidzo chinokanganisa, zvichikonzera kuita kwedunhu. bhodhi kuderera, saka zvinodikanwa kudzora iyo impedance kukosha mukati meimwe siyana.