Kuyilo lwePCB, uyilo ludlala indima ethe kratya kuyilo lonke kunye nesicelo semveliso.Inyathelo ngalinye loyilo lifuna ukhathalelo olubalaseleyo kunye nokuqwalaselwa ukufezekisa ukusebenza kakuhle.
Iingcingo zasekunene-engile ngokuqhelekileyo yimeko ekufuneka iphetshwe kangangoko kunokwenzeka kwiingcingo zePCB, kwaye iphantse yaba yenye yemigangatho yokulinganisa umgangatho wocingo.Ke ingakanani impembelelo enayo i-engile-engile yocingo ekuhanjisweni komqondiso?
Okwesibini, amaxabiso ahluke ngenxa yeenkqubo ezahlukeneyo zemveliso.
Iinkqubo ezahlukeneyo zemveliso zikhokelela kwiindleko ezahlukeneyo.Njengebhodi efakwe ngegolide kunye nebhodi efakwe i-tin-plated, imilo yomzila kunye nokubetha, ukusetyenziswa kwemigca yesikrini sesilika kunye nemigca yefilimu eyomileyo iya kwenza iindleko ezahlukeneyo, okukhokelela ekuhlukeni kwexabiso.
Ngokomgaqo, ukulandelwa kwe-angle-angle kuya kutshintsha ububanzi bomgca womzila wothumelo, okukhokelela ekuphelisweni kwe-impedance.Ngapha koko, ayisiyiyo kuphela imikhondo ye-angle ekunene, kodwa kunye ne-angle-angle ebukhali inokubangela utshintsho lwe-impedance.
Impembelelo yokulandelela i-angle-angle kwi-signal ibonakaliswe ngokukodwa kwiinkalo ezintathu: okokuqala, ikona inokulingana nomthwalo we-capacitive kumgca wokuhambisa, ukunciphisa ixesha lokunyuka;okwesibini, ukungaqhubeki kwe-impedance kuya kubangela ukubonakaliswa komqondiso;
Eyesithathu yi-EMI eveliswe yincam ye-engile ekunene.I-parasitic capacitance ebangelwa yi-right-angle yomgca wothumelo ingabalwa ngolu hlobo lulandelayo lwe-empirical formula: C = 61W (Er) 1/2/Z0 Kule fomyula ingentla, i-C ibhekisela kwi-capacitance elinganayo yekona ( Iyunithi: PF),
I-W ibhekisa kububanzi bomkhondo (iyunithi: intshi), i-εr ibhekisa kwi-dielectric constant ye-medium, kwaye i-Z0 luphawu lokuphazamiseka komgca wothumelo.
Njengoko ububanzi bomgca we-right-angle trace inyuka, i-impedance apho iya kuncitshiswa, ngoko ke into ethile yokubonakalisa umqondiso iya kwenzeka.Sinokubala i-impedance elinganayo emva kokuba ububanzi bomgca bunyuswe ngokwefomula yokubala ye-impedance ekhankanywe kwisahluko somgca wothumelo.
Emva koko ubale umlinganiso wokubonakalisa ngokwefomula yovavanyo: ρ=(Zs-Z0)/(Zs+Z0).Ngokuqhelekileyo, utshintsho lwe-impedance olubangelwa i-wiring ye-right-angle iphakathi kwe-7% kunye ne-20%, ngoko ke i-coefficient yokubonisa ubuninzi malunga ne-0.1.Shenzhen ANKE PCB Co.,LTD
Ixesha lokuposa: Jun-25-2022
