I-12 Layer FR4 ENIG Impedance Control PCB
Kungani amabhodi e-PCB edinga i-impedance?
1. Ibhodi lesifunda le-PCBukuze kucatshangelwe ukufakwa nokufakwa kwezingxenye ze-elekthronikhi, kamuva ukufakwa kwepheshi ye-SMT nakho kudingeka kucatshangelwe ukuqhutshwa komsebenzi kanye nokusebenza kokudluliselwa kwesignali nezinye izinkinga, ngakho-ke kuzodinga i-impedance ephansi ngangokunokwenzeka.
2. Ibhodi lesifunda le-PCB ekukhiqizeni i-copper deposition, i-tin plating (noma i-electroless plating, i-hot spray tin), i-soldering nezinye izinqubo, izinto ezisetshenziswayo kufanele zidinga ukumelana okuphansi, ukuze kuqinisekiswe ukuthi inani eliphelele le-impedance yebhodi lesifunda ukuhlangabezana nezidingo zekhwalithi yomkhiqizo, ukuze usebenze ngokujwayelekile.
3. PCB wesifunda ibhodi tin Plating iyona othambekele kakhulu ezinkingeni lonke ukukhiqizwa wesifunda ibhodi, isixhumanisi ukhiye ezithinta impedance;iphutha layo elikhulu i-oxidation elula noma i-deliquescence, i-brazing engalungile, ukuze ibhodi lesifunda linzima ukulithengisa, i-impedance iphezulu kakhulu, okuholela ekuziphatheni okubi noma ukusebenza okungazinzile kwebhodi lonke.
4. Umqhubi webhodi lesifunda le-PCB uzoba nokudluliswa kwesignali okuhlukahlukene, umugqa ngokwawo ngenxa yokugubha, ukushuba kwe-laminate, ububanzi bezintambo nezinye izici, kuzodala ukuguqulwa kwenani le-impedance, kwenze ukuhlanekezela kwesignali, okuholela ekusebenzeni ibhodi lesifunda liyancipha, ngakho-ke kuyadingeka ukulawula inani le-impedance ebangeni elithile.
