Me yasa buga allon kewayawa bukatar impedance iko?
A cikin layin siginar watsawa na na'urar lantarki, juriyar da ake fuskanta lokacin da siginar babban mitar sigina ko igiyar lantarki ta yaɗu ana kiransa impedance.Me yasa allon PCB ya zama impedance yayin aikin masana'anta na masana'antar hukumar kewaye?Mu yi nazari daga dalilai guda 4 kamar haka:
1. The PCB kewaye allon na masana'antar allon kewayawa yakamata suyi la'akari da toshewa da shigar da kayan aikin lantarki, kuma haɗin haɗin SMT na baya shima yana buƙatar yin la'akari da batutuwa kamar haɓakawa da aikin watsa sigina, don haka ƙananan impedance, mafi kyau.
2. The PCB kewaye hukumar sha jan jan nutse, electroplating tin (ko sinadarai plating, thermal fesa tin), connector soldering da sauran matakai a lokacin samar tsari.Abubuwan da aka yi amfani da su dole ne su buƙaci ƙarancin juriya don tabbatar da ƙimar ƙimar da'irar gabaɗaya Ayyukan al'ada za'a iya cimma su ne kawai lokacin da buƙatun ingancin samfur suka cika.
3. Tin plating na pcb da'irar allunan da'irar ne mafi kusantar da matsaloli a samar da dukan kewaye hukumar, kuma shi ne mabudin mahada da ke shafar impedance;Babban lahaninsa shine sauƙin iskar shaka ko rashin ƙarfi, ƙarancin solderability, sa allon kewayawa da wahala don siyarwa da wuce gona da iri.Maɗaukaki, yana haifar da rashin daidaituwa ko rashin zaman lafiya na aikin hukumar gaba ɗaya.
4. Masu gudanarwa a cikin kwamitin da'ira na PCB na masana'antar hukumar za su watsa sigina iri-iri.Da'irar kanta za ta canza darajar impedance saboda etching, kauri tari, fadin waya da sauran dalilai, wanda zai haifar da karkatar da siginar kuma ya kai ga allon kewayawa.Aiki yana faɗuwa, don haka kuna buƙatar sarrafa ƙimar impedance a cikin takamaiman kewayon
REALTER: Aluminum Base Circuit Board , LED fitilu PCB allon , MCPCB
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