Tare da haɓaka fasahar PCB da haɓaka buƙatun mabukaci na samfuran sauri da ƙarfi, PCB ya canza daga ainihin allo mai Layer biyu zuwa jirgi mai nau'i huɗu, yadudduka shida kuma har zuwa yadudduka goma zuwa talatin na dielectric da masu gudanarwa..Me yasa ƙara yawan yadudduka?Samun ƙarin yadudduka na iya ƙara rarraba wutar lantarki na allon kewayawa, rage yawan magana, kawar da tsangwama na lantarki da goyan bayan sigina masu sauri.Adadin yadudduka da aka yi amfani da su don PCB ya dogara da aikace-aikacen, mitar aiki, ƙimar fil, da buƙatun siginar sigina.

Ta hanyar tara yadudduka biyu, ana amfani da saman saman (watau Layer 1) azaman siginar sigina.Tari mai Layer huɗu yana amfani da saman sama da ƙasa (ko na 1st da 4th layer) azaman siginar sigina.A cikin wannan tsari, ana amfani da matakan 2nd da 3rd a matsayin jiragen sama.Layin prepreg yana haɗe bangarori biyu ko fiye masu gefe biyu tare kuma yana aiki azaman dielectric tsakanin yadudduka.PCB mai Layer shida yana ƙara yadudduka tagulla biyu, kuma na biyu da na biyar suna aiki azaman jirage.Layer 1, 3, 4, da 6 suna ɗaukar sigina.

Ci gaba zuwa tsarin Layer shida, Layer na ciki na biyu, uku (lokacin da yake da katako mai gefe biyu) da na hudu (lokacin da yake da allon fuska biyu) a matsayin babban Layer, kuma prepreg (PP) shine. sandwiched tsakanin ainihin alluna.Tun da kayan da aka riga aka shirya ba a cika su ba, kayan yana da laushi fiye da ainihin kayan.Tsarin masana'anta na PCB yana amfani da zafi da matsa lamba ga duka tari kuma yana narkar da prepreg da ainihin don a haɗa yadudduka tare.

Allolin Multilayer suna ƙara ƙarin yadudduka na tagulla da dielectric zuwa tari.A cikin PCB mai Layer takwas, layuka bakwai na ciki na dielectric manne da shimfidar tsari huɗu da siginar sigina huɗu tare.Allolin Layer goma zuwa goma sha biyu suna ƙara adadin dielectric yadudduka, riƙe da yadudduka na tsare-tsare huɗu, kuma suna ƙara adadin sigina.