Guddiga PCB impedance waxaa loola jeedaa halbeegyada iska caabinta iyo falcelinta, taas oo caqabad ku ah beddelka hadda. Soo saarista guddiyada wareegga PCB, ka-hortagga impedance waa lama huraan. Waa maxay sababta looxyada wareegga PCB ugu baahan yihiin impedance?

1. Wareegga PCB (hoosta guddiga) waa in ay tixgeliyaan xidhidhiyaha iyo rakibidda qaybaha elektaroonigga ah, iyo waxqabadka gudbinta signalada waa in sidoo kale la tixgeliyaa ka dib marka dambe ee SMT-ga la xiro. Sidaa darteed, hoos u dhigista xannibaadda, ayaa ka sii fiican, gaar ahaan calaamadaha microwave. Qalabka, shuruudaha iska caabintu waa: in ka yar 1&TIME; 10-6 sentimitir laba jibaaran.

2. Habka wax soo saarka ee looxyada wareegga pcb, waa inay maraan habab ay ka mid yihiin immersion naxaas ah, daasad daasad ah (ama dahaadh kiimikaad, ama daasadda buufin kulaylka), alxanka xiriiriyaha, iwm, iyo alaabta loo isticmaalo in links kuwan waa inay hubiyaan. in iska caabintu ay hooseyso, si loo hubiyo in guud ahaan caqiidada wareegga wareegga ay yar tahay si loo buuxiyo shuruudaha tayada wax soo saarka oo si caadi ah u shaqeyn kara.

Saddexaad, daasadda daasadda ah ee looxyada wareegga pcb ayaa ah kuwa ugu nugul dhibaatooyinka soo saarista guddiga wareegga oo dhan, waana xiriiriye muhiim ah oo saameeya xannibaadda. Ciladda ugu weyn ee daahan daasadda koronto-la’aanta ah waa midab fudud (fudud in la oxidized ama deliquescent) iyo solderability liidata, taas oo keeni doonta in alxanka adag ee guddiga wareegga, impedance sare, conductivity koronto liidata, ama xasiloonida ee waxqabadka guddiga guud.

4. Waxaa jira gudbinta calaamadaha kala duwan ee kaariyaasha guddiga wareegga pcb. Marka inta jeer ee ay tahay in la kordhiyo si loo kordhiyo heerka gudbintiisa, haddii wareegga laftiisa uu ka duwan yahay arrimo ay ka mid yihiin etching, dhumucdiisuna tahay, ballaca siliga, iwm, qiimaha impedance ayaa isbeddeli doona. , Si ay calaamadeeda u qalloocdo oo waxqabadka guddiga wareegga uu hoos u dhaco, sidaas darteed waxaa lagama maarmaan ah in la xakameeyo qiimaha impedance gudaha xad gaar ah.