Chifukwa chiyani ma board a PCB amachita zosokoneza?
Impedans - Ndipotu, amatanthauza kukana ndi magawo a awiriwa anachita, chifukwa PCB mzere kuganizira pulagi-mu unsembe wa zipangizo zamagetsi, pulagi-mu pambuyo kuganizira madutsidwe ndi chizindikiro kufala ntchito ndi nkhani zina, kotero ndizosapeŵeka kuti m'munsi mwa impedance bwino, resistivity ayenera kukhala otsika kuposa lalikulu centimita 1 × 10 wa kuchotsera 6 nthawi zotsatirazi.
Komano, PCB bolodi mu ndondomeko kupanga kudutsa mkuwa kumira, malata plating (kapena mankhwala plating, kapena matenthedwe kutsitsi malata), zolumikizira ndi mbali zina za kugwirizana ndi zipangizo ntchito ulalo ayenera kuonetsetsa kuti pansi. za resistivity, pofuna kuonetsetsa kuti impedans wonse wa bolodi PCB ndi otsika kuti agwirizane ndi zofunikira za khalidwe mankhwala, kapena gulu dera si ntchito bwinobwino.
The zamagetsi makampani lonse, PCB dera bolodi fakitale mu malata plating ulalo ndi vuto kwambiri, ndi zotsatira za impedance ya maulalo kiyi, chifukwa dera bolodi malata plating ulalo, tsopano wotchuka kukwaniritsa cholinga cha malata-plating pogwiritsa ntchito luso latin-plating luso, koma ife monga makampani zamagetsi monga wolandira makampani amagetsi, kapena PCB bolodi kupanga ndi processing makampani kwa zaka zoposa 10 kukhudzana ndi kuonerera.
Kwa makampani opanga zamagetsi, malinga ndi mzere wofufuzira, kufooka koopsa kwambiri kwa chitsulo chosanjikiza cha mankhwala ndikosavuta kutulutsa mtundu (zonse zokhala ndi oxidation yosavuta kapena deliquescence), kuyaka koyipa kumabweretsa zovuta kuwotcherera, kutsekeka ndikokwera kwambiri komwe kumayambitsa kusayenda bwino kapena Kusakhazikika kwa bolodi lonse, kukulitsa ndevu za malata mosavuta kumatsogolera ku mzere wa PCB wozungulira pang'ono kapena ngakhale kuwotchedwa kapena pazochitika zamoto.
Mzere waukulu wa bolodi PCB dera ndi mkuwa zojambulazo, mkuwa zojambulazo mu zimfundo solder ndi wosanjikiza malata, ndi zipangizo zamagetsi ndi kudzera solder phala (kapena solder mzere) welded pamwamba pa malata wosanjikiza, kwenikweni, solder phala mu Kusungunuka kwa soldering ku zigawo zamagetsi ndi malata plating wosanjikiza pakati pa malata zitsulo (ie, conductive zitsulo monomers), kotero izo zikhoza kukhala zosavuta ndi mwachidule kunena kuti zigawo zikuluzikulu pakompyuta ndi yokutidwa ndi malata plating wosanjikiza ndi pansi pa PCB. bolodi ndiyeno mkuwa zojambulazo Connection.
Choncho chiyero cha plating wosanjikiza ndi kutsekereza kwake ndiye chinsinsi;koma osati pamaso kugwirizana zigawo zikuluzikulu zamagetsi, mwachindunji ndi chida kuti azindikire impedance, kwenikweni, kafukufuku chida (kapena chotchedwa mita cholembera) malekezero amakhalanso kudzera kukhudzana koyamba ndi bolodi bwalo pansi pa nthaka. wa zojambulazo mkuwa wa malata plating wosanjikiza ndiyeno ndi pansi pa PCB bolodi mkuwa zojambulazo kulumikiza panopa.Choncho malata ❖ kuyanika ndi chinsinsi, ndi chinsinsi zimakhudza impedance ndi kukhudza ntchito ya bolodi dera bolodi, komanso zosavuta kunyalanyazidwa kiyi.
Kuwonjezera zitsulo monomers, mankhwala awo ndi kondakitala osauka magetsi kapena ngakhale sanali conductive (chomwe chimayambanso ndi kukhalapo kwa kugawa mphamvu mu mzere kapena kufala mphamvu fungulo), kotero malata plating wosanjikiza pamaso pa izi. mtundu wa zinthu zowoneka ngati zochititsa chidwi komanso zosapangitsa kapena zosakaniza za malata, zopangira zokonzeka zopangidwa kapena makutidwe ndi okosijeni am'tsogolo, momwe ma electrolytic amachitira chinyezi komanso kusagwirizana kwake ndi kutsekeka kwake ndizokwera kwambiri (zokwanira kukhudza kuchuluka kapena kufalikira kwa ma siginecha a mabwalo a digito. ).mlingo kapena kufalikira kwa ma siginecha mumayendedwe a digito), ndipo mawonekedwe ake sasintha.Izi zimakhudza magwiridwe antchito a board board ndi makina onse.
Pankhani ya zochitika zamakono kupanga chikhalidwe, pcb bolodi pansi pa plating zakuthupi ndi ntchito ndi zimakhudza PCB bolodi makhalidwe a impedance chifukwa chofunika kwambiri ndi chifukwa kwambiri mwachindunji, komanso chifukwa cha plating ndi ukalamba. ndi chinyezi electrolysis ya kusinthasintha kwa impedance kuti impedance ake kutulutsa nkhawa za zotsatira za zotsatira zobisika kwambiri ndi kusintha, ndipo chifukwa chachikulu chobisala chake chagona zotsatirazi: woyamba sangakhoze kuwonedwa ndi wamaliseche diso, ndipo wachiwiri sangakhale muyeso nthawi zonse, chifukwa ali ndi nthawi ndi chinyezi yozungulira ndi kusintha kwa impedance wa bolodi ndi ntchito makina.Chifukwa chimakhala ndi kusinthasintha ndi kusintha kwa nthawi komanso chinyezi cha chilengedwe, choncho nthawi zonse zimakhala zosavuta kunyalanyazidwa.
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Nthawi yotumiza: Sep-08-2023