Waa maxay sababta looxyada PCB u sameeyaan impedance?
Impedance - dhab ahaantii, waxaa loola jeedaa iska caabin ah iyo xuduudaha lammaane falcelinta, sababtoo ah line PCB si ay u tixgeliyaan plug-in rakibaadda ee qaybaha elektarooniga ah, plug-in ka dib markii la tixgeliyo conductivity iyo waxqabadka gudbinta signal iyo arrimo kale, sidaas darteed, Waa lama huraan in hoos u dhigista impedance ka wanaagsan tahay, iska caabintu waa inay ka hooseysaa sentimitir laba jibaaran 1 × 10 ee laga jaray 6 jeer kuwan soo socda.
Dhinaca kale, guddiga PCB ee habka wax soo saarka si ay u maraan naxaasta quusaya, daasadda qasacadaysan (ama dahaadhay kiimikada, ama daasadda kulaylka buufiyo), Xidhiidhiyayaasha iyo qaybaha kale ee isku xidhka iyo alaabta loo isticmaalo in this link waa in la hubiyo in hoose ee iska caabin ah, si loo hubiyo in ciribtirka guud ee guddiga PCB uu hooseeyo si ay u hoggaansamaan shuruudaha tayada alaabta, haddii kale guddiga wareeg ah ma shaqayn doono si caadi ah.
Warshadaha elektiroonigga ah guud ahaan, warshadda guddiga wareegga PCB ee isku xirka daasad-ku-xirnaanta ayaa ah tan ugu dhibka badan, waa saameynta xannibaadda xiriiriyeyaasha muhiimka ah, sababtoo ah isku xirka guddiga daasadda, hadda waa caan si loo gaaro ujeedada daasado-dahaadh isticmaalaya technology tin-plating kiimikaad, laakiin annagu sida warshadaha elektarooniga ah sida qaataha warshadaha elektarooniga ah, ama PCB wax soo saarka iyo warshadaha processing muddo ka badan 10 sano xiriir iyo fiirsashada.
Warshadaha elektiroonigga ah, marka loo eego khadka baadhista, daciifnimada ugu dhimashada badan ee lakabka daasadda kiimikaad way fududahay in la midabeeyo (labadaba oxidation fudud ama deliquescence labadaba), brazing liidata waxay keentaa inay adagtahay alxanka, is-hortaaggu aad buu u sarreeyaa taasoo horseedaysa habacsanaan liidata ama Xasilooni la'aanta waxqabadka guddiga oo dhan, fudud si ay u koraan whiskers daasadaha ayaa horseedaya in khadka PCB uu gaabinayo ama xitaa gubto ama dhacdooyinka dabka.
Xariiqda ugu muhiimsan ee guddiga wareegga PCB waa bireed naxaas ah, bireed naxaas ah oo ku jira kala-goysyada alxanka waa lakabka daasadda, iyo qaybaha elektiroonigga ah waa iyada oo loo marayo koollada alxanka (ama xariiqda alxanka) ee lagu alxanayo dusha sare ee lakabka daasadda, dhab ahaantii, koollada alxanka ee Xaaladda dhalaalidda ee alaabta elektiroonigga ah iyo lakabka daasadda daasado ka dhexeeya biraha qasacadaysan (ie, conductive biraha monomers), si ay u noqon kartaa mid fudud oo kooban in la tilmaamo in qaybaha elektarooniga ah waxaa lagu dahaadhay lakabka daasadda hoose ee PCB ah. looxa ka dibna Xidhiidhka bireed naxaas ah.
Markaa nadiifinta lakabka daasadda daasadda ah iyo caqabadaheedu waa furaha;laakiin maaha ka hor inta aan la isku xidhin qaybaha elektiroonigga ah, si toos ah qalabka si loo ogaado impedance, dhab ahaantii, qalabka baaritaanka (ama loo yaqaan qalinka mitirka) ayaa sidoo kale loo marayo xiriirka ugu horreeya ee guddiga wareegga hoose ee dusha sare. ee xaashida naxaasta ah ee lakabka daasadda daasadda ka dibna la hoose ee guddiga PCB bireed copper si ay ugu xidhmaan hadda.Markaa dahaadhka tiintu waa furaha, waa furaha si uu u saameeyo xannibaadda oo saameeya waxqabadka guddiga wareegga wareegga, laakiin sidoo kale waa sahlan tahay in la iska indhatiro furaha.
Waxa intaa dheer in monomers biraha, xeryahooda waa kirishbooyada liidata ee korantada ama xitaa non-conductive (taas oo sidoo kale ay sabab u tahay jiritaanka awoodda qaybinta ee xariiqda ama awoodda gudbinta ee furaha), sidaas lakabka dahaadhaysa tin in joogitaanka this nooc ka mid ah xeryahooda u muuqda conductive iyo non-conductive ama isku dhafka ah ee daasadda, ay resistivity diyaar u ah ama oksaydhation mustaqbalka, falcelinta electrolytic ee qoyaan iyo ay iska caabin u dhiganta iyo impedance waa mid aad u sarreeya (ku filan si ay u saameeyaan heerka ama gudbinta signal of wareegyada digital. ).heerka ama gudbinta signalka ee wareegyada dhijitaalka ah), iyo caqabadaheedu sifo ma aha mid joogto ah.Tani waxay saamaysaa waxqabadka guddiga wareegga iyo mashiinka guud ahaan.
Marka la eego ifafaale wax soo saarka bulshada ee hadda, guddiga pcb ee hoose ee alaabta dahaadhka iyo waxqabadka waa in ay saameeyaan sifooyinka guddiga PCB ee impedance ee sababta ugu muhiimsan iyo sababta ugu toos ah, laakiin sidoo kale sababtoo ah dahaadhay la gabow. iyo electrolysis qoyaan ee kala duwanaansho ee impedance si ay impedance si ay u soo saaraan walaac ku saabsan saamaynta saamaynta ka badan oo qarsoon iyo isbedel, iyo sababta ugu weyn ee ay u qariyaan been in kuwan soo socda: marka hore aan la arki karin by indhaha qaawan, iyo labaad ma noqon karaan cabbir joogto ah, sababtoo ah waxa ay leedahay waqti iyo qoyaan deegaanka iyo isbedelka impedance ee guddiga iyo waxqabadka mashiinka.Sababtoo ah waxay leedahay kala duwanaansho leh isbeddelka wakhtiga iyo qoyaanka deegaanka, sidaas darteed mar walba way fududahay in la iska indhatiro.
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Waqtiga post: Seb-08-2023