12 Layer FR4 ENIG Impedance Control PCB

1. PCB kewaye allondon yin la'akari da shigarwa da shigarwa na kayan lantarki, daga baya SMT facin shigar kuma yana buƙatar yin la'akari da aiki da aiki da watsa sigina da sauran batutuwa, don haka zai buƙaci impedance a matsayin ƙananan mai yiwuwa.

2. PCB kewaye hukumar a cikin samar da tsari na jan ƙarfe jijiya, tin plating (ko electroless plating, zafi fesa tin), soldering da sauran matakai, da kayan amfani dole ne bukatar low resistivity, don tabbatar da cewa overall impedance darajar da kewaye hukumar zuwa. cika buƙatun ingancin samfur, don yin aiki akai-akai.

3. PCB kewaye hukumar tin plating shi ne mafi kusantar da matsaloli a cikin dukan kewaye hukumar samar, shi ne key mahada shafi impedance;Babban lahaninsa shine sauƙin iskar shaka ko rashin ƙarfi, rashin ƙarfi mara ƙarfi, don haka allon kewayawa yana da wahalar siyarwa, impedance yana da yawa, yana haifar da rashin ƙarfi ko rashin kwanciyar hankali na duka jirgi.

4. Mai gudanarwa a cikin PCB kewaye hukumar za ta sami nau'in watsa sigina iri-iri, layin kanta saboda etching, laminate kauri, nisa waya da sauran dalilai, zai haifar da canjin ƙimar impedance, yin siginar siginar, wanda zai haifar da aiwatar da aikin. allon kewayawa ya ragu, don haka ya zama dole don sarrafa ƙimar impedance a cikin wani kewayon.