Kwinkqubo yoyilo lwe-PCB, ezinye iinjineli azifuni ukubeka ubhedu kuwo wonke umphezulu womaleko ongezantsi ukuze yonge ixesha. Ngaba oku kuchanekile? Ngaba i-PCB kufuneka ifakwe ikopi?
Okokuqala, kufuneka sicace gca: Ukubekwa kwendlela yobhedu esezantsi kuyingenelo kwaye kuyimfuneko kwi-PCB, kodwa ukubekwa kobhedu kwiBhodi yonke kufuneka kuhlangabezane neemeko ezithile.
Izibonelelo zokubeka ezantsi
1. Ukusuka kwimbono ye-EMC, wonke umphezulu womaleko ongezantsi ugutyungelwe ngobhedu, olubonelela ngokhuseleko olongezelelekileyo lokukhusela kunye nokucinezelwa kwengxolo yomqondiso wangaphakathi kunye nomqondiso wangaphakathi. Kwangelo xesha, ikwanokhuseleko oluthile kwizixhobo eziphantsi kunye nemiqondiso.
2. Ukusuka kwimbono yemveliso yobushushu, ngenxa yokunyuka okukhoyo kwiBhodi yeBhodi ye-PCB, i-BGA CHIP ephambili ikwafuneka ithathele ingqalelo imicimbi yokuhlamba ubushushu ngakumbi. Ibhodi yonke yesekethe ikhutshiwe ngobhedu ukuphucula amandla obushushu be-PCB.
3. Ukusuka kwindawo yenkqubo, ibhodi yonke ikhutshiwe ngobhedu ukwenza iBhodi yePCB isasazwe. I-PCB ukugoba kunye nokuvukela kufuneka kuthintelwe ngexesha lokuqhubela phambili kwe-PCB kunye nokucinezela. Kwangelo xesha, uxinzelelo olubangelwa kukuthengiswa kwe-PCB Reflow Ukungeniswa akuyi kubangelwa yi-foil engalinganiyo yobhedu. I-PCB Imfazwe.
ISIKHUMBUZO: Kwiibhodi ze-Winder ezimbini, ukuphikisana kobhedu kuyafuneka
Kwelinye icala, kuba iBhodi ye-Winder ingenayo inqwelomoya epheleleyo, umhlaba oqingqiweyo unokubonelela ngendlela yokubuya, kwaye inokusetyenziswa njengesalathiso se-COPANAR ukufezekisa injongo yokulawula ukufezekisa injongo yokulawula. Singahlala sibeka iplanethi esezantsi kwi-fayider engezantsi, emva koko sibeka izinto eziphambili kunye nemigca yamandla kunye nemigca yomqondiso kwi-suble ephezulu. Kwisekethe esiphezulu, i-analog isekethe (i-analog-to-to-digital irejista, i-Swing-Postoions Transtions), ukubekwa kobhedu ngumkhwa olungileyo.
Iimeko zokubetheka kobhedu ezantsi
Nangona umlinganiso ongezantsi wobhedu oluhle kakhulu kwi-PCB, kusafuneka ahlangabezane neemeko ezithile:
1. Beka kangangoko kunokwenzeka ngaxeshanye, ungafikeleli konke ngaxeshanye, phephe ulusu lobhedu ekuqhekekeni, kwaye wongeze kwimingxunya kunxweme lwendawo yobhedu.
Isizathu: I-Copper Fainer kwi-facier yomphezulu kufuneka iphulwe kwaye itshatyalaliswe ngamacandelo kunye nemigca yomqondiso kwi-sunder. Ukuba i-foil yobhedu ichithwe kakubi (ngokukodwa i-foil emdaka kunye nekampiki yobhedu yaphukile), iya kuba yi-eriyali kwaye ibangele iingxaki ze-EMI.
2. Cinga ngemali esemthethweni yephakeji ezincinci, ngakumbi iiphakheji ezincinci, ezinje nge-0402 0603, ukuphepha iziphumo zemvula.
Isizathu: Ukuba yonke iBhodi yeSekeji yeSekethe ityhilwe, ubhedu lwemigca yecandelo iya kuqhagamshelwa ngokupheleleyo kubhedu, oluya kubangela ubushushu bukhawuleze, nto leyo eya kubangela ubunzima kwi-Desolding kunye nezokusebenza.
3. Ukuphakanyiswa kweBhodi yeSekethe i-PCB yonke kukhethwa ngokuqhubekayo. Umgama osuka emhlabeni oza kusayina kufuneka ulawulwe ukuphepha ukunqunyulwa kwimveliso yomgca wokuhambisa.
Isizathu: Iphepha lobhedu lisondele kakhulu emhlabeni liza kutshintsha ukumiselwa komgca wokuhambisa i-Microsrip, kwaye iphepha le-hicpernt libe nefuthe elibi kwilayini yokuhambisa.
4. Amanye amatyala akhethekileyo axhomekeke kwimeko yesicelo. Uyilo lwe-PCB akufuneki luyilo olupheleleyo, kodwa kufuneka lulinganiswe kwaye ludityaniswe neethiyori ezahlukeneyo.
Isizathu: Ukongeza kwimiqondiso enobuthathaka ekufuneka yenziwe ukuba ibekwe, ukuba kukho imigca emihle yesantya kunye namacandelo, ikhefu elikhulu lezikhefu elincinci nelide liya kuveliswa, kwaye iindlela ze-wiring ziqinile. Kuyimfuneko ukuphepha imingxunya yobhedu emininzi kumphezulu kangangoko kunokwenzeka ukuba uqhagamshele kungqimba olusezantsi. Umaleko ongaphezulu unokukhetha ngaphandle kobhedu.
