PCB impedance inoreva maparamendi ekupokana uye kuita, ayo anotamba anobstruction basa mukuchinjanisa ikozvino. In pcb redunhu bhodhi kugadzirwa, impedance kurapwa kunokosha. Saka unoziva here kuti nei PCB redunhu mabhodhi achida kuita impedance?

1, PCB redunhu bhodhi pazasi kufunga kugadzwa zvemagetsi zvinoriumba, magetsi conductivity uye chiratidzo kutapurirana kuita pashure kuisa, saka zvinoda yakaderera impedance, zviri nani, resistivity iri isingasviki 1 × 10-6 per square centimita pazasi.

2, PCB redunhu bhodhi mukugadzira kugadzirwa kuona mhangura inonyura, tin plating (kana electroless plating, kana inopisa pfapfaidzo tin), solder majoini uye mamwe maitiro kugadzirwa links, uye zvinhu zvinoshandiswa mune izvi zvinongedzo zvinofanirwa kuve nechokwadi chekuti resistivity pasi, mukati. kuti ive nechokwadi chekuti iyo impedance yese yePCB redunhu bhodhi yakadzikira kuti isangane nemhando yezvigadzirwa zvinodiwa, inogona kushanda zvakajairika.

3, iyo tinning yePCB board ndiyo inonyanya kutarisana nezvinetso mukugadzirwa kweiyo yese redunhu bhodhi, uye ndiyo kiyi link inobata iyo impedance. Kukanganisa kukuru kwekemikari tin plating layer iri nyore kushanduka (zvese zviri nyore oxidation kana delixing), kushambidzika kwakashata, izvo zvinozotungamira kune yakaoma welding yebhodhi redunhu, impedance yakakwira inotungamira kune kushomeka kwemagetsi conductivity kana kusagadzikana kwese bhodhi kuita.

4, PCB redunhu bhodhi mune kondakita ichave neyakasiyana-siyana yekutapurirana kwechiratidzo, nguva yekuvandudza chiyero chekutapurirana uye inofanira kuwedzera frequency yayo, mutsara pachawo kana etching, ukobvu hwelaminated, wire upamhi uye zvimwe zvinhu zvakasiyana, zvinokonzeresa iyo impedance. zvakakodzera kuchinja, kuitira kuti chiratidzo kukanganisa, zvichiita kuti bhodhi kuita kuderera, saka unofanira kudzora impedance kukosha mune imwe siyana.