PCB impedance imatanthawuza magawo a kukana ndi kuchitapo kanthu, zomwe zimagwira ntchito yosokoneza pakusintha kwapano. Mu pcb dera gulu kupanga, impedance mankhwala n'kofunika. Ndiye kodi mukudziwa chifukwa PCB dera matabwa ayenera kuchita impedance?

1, PCB dera bolodi pansi kuganizira unsembe wa zigawo zikuluzikulu zamagetsi, madutsidwe magetsi ndi ntchito chizindikiro kufala pambuyo kuyikapo, kotero zidzafunika m'munsi impedance, bwino, resistivity ndi zosakwana 1 × 10-6 pa lalikulu centimita pansipa.

2, PCB dera bolodi mu ndondomeko kupanga kuona mkuwa kumira, malata plating (kapena electroless plating, kapena otentha kutsitsi malata), mafupa solder ndi maulalo kupanga ndondomeko, ndi zipangizo ntchito maulalo ayenera kuonetsetsa kuti resistivity pansi, mu kuti kuonetsetsa kuti impedans wonse wa bolodi PCB dera ndi otsika kukwaniritsa zofunika mankhwala khalidwe, akhoza kugwira ntchito bwinobwino.

3, tinning wa bolodi PCB ndiye sachedwa kwambiri mavuto kupanga gulu lonse dera, ndipo ndi kugwirizana chinsinsi zimakhudza impedance. Choyipa chachikulu chamtundu wa plating wamankhwala ndikusintha kwamtundu kosavuta (zonse zokhala ndi oxidation yosavuta kapena kukongoletsa), kuwotcherera kovutirako, komwe kungayambitse kuwotcherera kwa board board, kutsekeka kwakukulu komwe kumayambitsa kusayenda bwino kwamagetsi kapena kusakhazikika kwa bolodi lonse.

4, PCB dera bolodi mu kondakitala adzakhala zosiyanasiyana kufala chizindikiro, pamene kusintha mlingo wake kufala ndi ayenera kuonjezera pafupipafupi ake, mzere wokha ngati etching, makulidwe laminated, waya m'lifupi ndi zinthu zina ndizosiyana, zidzachititsa impedance. m'pofunika kusintha, kuti chizindikiro kupotoza, chifukwa gulu ntchito kuchepa, choncho muyenera kulamulira impedance mtengo mu osiyanasiyana.