Kungani ibhodi lesifunda eliphrintiwe udinga impedance control?
Emugqeni wesiginali yokudlulisela wedivaysi ye-elekthronikhi, ukumelana okuhlangabezwana nakho lapho isignali yefrikhwensi ephezulu noma igagasi logesi lisakazeka kubizwa ngokuthi i-impedance.Kungani amabhodi e-PCB kufanele angasebenzi ngesikhathi sokwenziwa kwefekthri yebhodi lesifunda?Ake sihlaziye kulezi zizathu ezi-4 ezilandelayo:
1. I Ibhodi lesifunda le-PCB yefekthri yebhodi lesifunda kufanele icabangele ukuxhuma nokufaka izingxenye ze-elekthronikhi, futhi uxhumo lwakamuva lwe-SMT patch nalo ludinga ukucabangela izindaba ezifana nokuhamba nokusebenza kwesignali yokudluliswa kwesignali, ngakho-ke ukwehla kwe-impedance, kuba ngcono.
2. Ibhodi lesifunda le-PCB lishona ngethusi, i-electroplating tin (noma i-chemical plating, i-thermal spray tin), i-soldering yesixhumi nezinye izinqubo phakathi nenqubo yokukhiqiza.Izinto ezisetshenziswayo kumele zidinga ukumelana okuphansi ukuze kuqinisekiswe inani eliphelele le-impedance yebhodi lesifunda Ukusebenza okuvamile kungafinyelelwa kuphela lapho izidingo zekhwalithi yomkhiqizo zihlangene.
3. I-tin plating yamabhodi wesifunda se-pcb iyona ethambekele kakhulu ezinkingeni ekukhiqizeni ibhodi lesifunda lonke, futhi iyisixhumanisi esiyinhloko esithinta i-impedance;iphutha layo elikhulu i-oxidation lula noma deliquescence, solderability kabi, okwenza ibhodi wesifunda kube nzima solder kanye impedance ngokweqile.Okuphezulu, okuholela ekuziphatheni okubi noma ukungazinzi komsebenzi wonke webhodi.
4. Amakhondaktha ebhodini lesekethe le-PCB yefekthri yebhodi lesifunda bazothumela amasignali ahlukahlukene.Isekethe ngokwayo izoshintsha inani le-impedance ngenxa ye-etching, ukushuba kwesitaki, ububanzi bezintambo nezinye izici, okuzokwenza ukuthi isignali ihlanekezelwe futhi iholele ebhodini lesifunda.Ukusebenza kuyehla, ngakho-ke udinga ukulawula inani le-impedance ngaphakathi kwebanga elithile
I-REALTER: I-Aluminium Base Circuit Board , LED Lights PCB board , I-MCPCB
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