Ngoba ibhodi yesekethe eprintiweyo Ufuna ulawulo lwe-impedance?
Kumgca wesiginali yothumelo yesixhobo sombane, ukuxhathisa okufunyenweyo xa isiginali ye-frequency ephezulu okanye i-electromagnetic wave propagate ibizwa ngokuba yi-impedance.Kutheni le nto iibhodi zePCB kufuneka zingasebenzi ngexesha lenkqubo yokwenziwa komzi-mveliso webhodi yesekethe?Makhe sihlalutye kwezi zizathu zi-4 zilandelayo:
1. I PCB ibhodi yesekethe Umzi-mveliso webhodi yesekethe kufuneka ithathele ingqalelo ukuplaga kunye nokufakela izinto ze-elektroniki, kwaye uqhagamshelo lwe-SMT lwamva lufuna ukuqwalasela imiba efana ne-conductivity kunye nokusebenza kokuhanjiswa komqondiso, ngoko okukhona kusezantsi kokuphazamiseka, kungcono.
2. Ibhodi yesekethe ye-PCB idlula i-copper sinking, i-electroplating tin (okanye i-chemical plating, i-thermal spray tin), i-soldering ye-soldering kunye nezinye iinkqubo ngexesha lokuvelisa.Izinto ezisetyenzisiweyo kufuneka zifune ukuxhathisa okuphantsi ukuze kuqinisekiswe ixabiso elipheleleyo le-impedance yebhodi yesiphaluka Umsebenzi oqhelekileyo unokufezekiswa kuphela xa iimfuno zomgangatho wemveliso zidibene.
3. I-tin plating yeebhodi zesekethe ye-pcb yeyona nto ixhaphakileyo kwiingxaki kwimveliso yebhodi yesekethe yonke, kwaye likhonkco eliphambili elichaphazela i-impedance;isiphene yayo enkulu oxidation lula okanye deliquescence, solderability kakubi, ukwenza ibhodi yesekethe nzima solder kunye impedance kakhulu.Okuphezulu, okubangelwa ukuqhuba kakubi okanye ukungazinzi komsebenzi webhodi jikelele.
4. Iikondaktara kwibhodi yesekethe yePCB kumzi-mveliso webhodi yesekethe ziya kuthumela iisignali ezahlukeneyo.Isekethe ngokwayo iya kutshintsha ixabiso le-impedance ngenxa ye-etching, ubukhulu be-stack, ububanzi be-wire kunye nezinye izinto, eziza kubangela ukuba umqondiso uphazamise kwaye uholele kwibhodi yesiphaluka.Ukusebenza kuyehla, ke kufuneka ulawule ixabiso le-impedance phakathi koluhlu oluthile
REALTER: Ibhodi yeSekethe yeAluminiyam , LED Izibane PCB ibhodi , MCPCB
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