Iingqwalasela zokuthotyelwa kwe-EMI/EMC kwiibhodi zesekethe eziguquguqukayo eziqinileyo

Kule post blog, siza kuxoxa EMI / EMC ukuthotyelwa iibhodi zesekethe rigid-flex kwaye kutheni kufuneka ziqwalaselwe.

Ukuqinisekisa ukuthotyelwa kokuphazamiseka kwe-electromagnetic interference (EMI) kunye nemigangatho yokuhambelana kwe-electromagnetic (EMC) kubalulekile kwizixhobo zombane kunye nokusebenza kwazo. Ngaphakathi kwishishini lePCB (iBhodi yeSekethe eShicileleyo), iibhodi zesekethe eziqinileyo ziyindawo ethile efuna uqwalaselo olucokisekileyo kunye nengqalelo kwiinkcukacha. Ezi bhodi zidibanisa iingenelo zeesekethe eziqinileyo kunye neziguquguqukayo, zizenza zibe lukhetho oludumileyo lwezicelo apho indawo iyancipha kwaye ukuqina kubalulekile.

Ingqwalasela ephambili ekufezekiseni ukuthotyelwa kwe-EMI/EMC kwiibhodi zesekethe eziguquguqukayo kumhlaba ofanelekileyo.Iinqwelomoya eziphantsi kunye nokukhusela kufuneka zenziwe ngononophelo kwaye zibekwe ukunciphisa i-EMI radiation kunye nokwandisa ukhuseleko lwe-EMC. Kubalulekile ukudala indlela ephantsi ye-impedance ye-EMI yangoku kunye nokunciphisa impembelelo yayo kwisekethe. Ngokuqinisekisa isistim esiqinileyo sokumisa kuyo yonke ibhodi yesekethe, umngcipheko weengxaki ezinxulumene ne-EMI unokunciphisa kakhulu.

Omnye umba omawuqwalaselwe kukubekwa kunye nokuhanjiswa kwemiqondiso enesantya esiphezulu. Iimpawu ezikhawulezayo zokunyuka nokuwa zichaphazeleka ngakumbi kwimitha ye-EMI kwaye zinokuphazamisana namanye amacandelo ebhodini.Ngokwahlula ngononophelo izibonakaliso zesantya esiphezulu kumacandelo abuthathaka afana neesekethe ze-analog, umngcipheko wokuphazamiseka unokuncitshiswa. Ukongeza, ukusetyenziswa kweendlela zokubonisa umahluko kunokuphucula ngakumbi ukusebenza kwe-EMI / EMC kuba zibonelela ngokhuseleko lwengxolo olungcono xa kuthelekiswa neempawu eziphelayo.

Ukukhethwa kwecandelo kukwabalulekile ekuthotyelweni kwe-EMI/EMC kwiibhodi zesekethe eziqinileyo.Ukukhetha amacandelo aneempawu ezifanelekileyo ze-EMI / EMC, ezifana nokukhutshwa kwe-EMI ephantsi kunye nokukhuseleka okulungileyo ekuphazamiseni kwangaphandle, kunokuphucula kakhulu ukusebenza kwebhodi. Amacandelo anezakhono ezakhelweyo ze-EMI/EMC, ezifana nezihluzi ezidibeneyo okanye izikhuselo, zinokwenza lula ngakumbi inkqubo yoyilo kunye nokuqinisekisa ukuthotyelwa kwemigangatho yolawulo.

Ukugquma okufanelekileyo kunye nokukhusela kukwangumbandela obalulekileyo. Kwiibhodi zesekethe eziqinileyo, iindawo eziguquguqukayo zichaphazeleka kuxinzelelo lomatshini kwaye zichaphazeleka ngakumbi kwimitha ye-EMI.Ukuqinisekisa ukuba iindawo eziguquguqukayo zikhuseleke ngokwaneleyo kwaye zikhuselwe kunokunceda ukuthintela imiba enxulumene ne-EMI. Ukongezelela, ukugquma okufanelekileyo phakathi kweengqimba ze-conductive kunye nezibonakaliso kunciphisa umngcipheko we-crosstalk kunye nokuphazamiseka komqondiso.

Abaqulunqi kufuneka banikele ingqalelo kwi-layout jikelele kunye ne-stackup yeebhodi eziqinileyo-flex. Ngokucwangcisa ngononophelo iileya ezahlukeneyo kunye namacandelo, ukusebenza kwe-EMI/EMC kunokulawulwa ngcono.Imigangatho yemiqondiso kufuneka ifakwe phakathi komhlaba okanye iileya zamandla ukunciphisa ukudibanisa umqondiso kunye nokunciphisa umngcipheko wokuphazamiseka. Ukongeza, ukusebenzisa i-EMI/EMC izikhokelo zoyilo kunye nemithetho kunokuncedisa ekuqinisekiseni ukuba uyilo lwakho luyahlangabezana neemfuno zokuthotyelwa.

Uvavanyo kunye nokuqinisekiswa kudlala indima ebalulekileyo ekufezekiseni ukuthotyelwa kwe-EMI / EMC kwiibhodi zesekethe eziqinileyo.Emva kokuba uyilo lokuqala lugqityiwe, uvavanyo olucokisekileyo kufuneka lwenziwe ukuze kuqinisekiswe ukusebenza kwebhodi. Uvavanyo lokukhutshwa kwe-EMI lulinganisa ubungakanani bemitha ye-electromagnetic ekhutshwa yibhodi yesekethe, ngelixa uvavanyo lwe-EMC luvavanya ukungakhuseleki kwayo ekuphazamisekeni kwangaphandle. Ezi mvavanyo zinokunceda ukuchonga nayiphi na imiba kwaye zivumele uhlengahlengiso oluyimfuneko ukuba lwenziwe ukufezekisa ukuthotyelwa.

Isishwankathelo, Ukuqinisekisa ukuthotyelwa kwe-EMI / EMC kwiibhodi zesekethe eziqinileyo zifuna ukuqwalaselwa ngokucophelela kwizinto ezahlukeneyo. Ukusuka kwisiseko esifanelekileyo kunye nokukhethwa kwecandelo ukuya kumqondiso wendlela kunye novavanyo, inyathelo ngalinye lidlala indima ebalulekileyo ekuphumezeni ibhodi ehlangabezana nemigangatho yokulawula. Ngokujongana nale ngqwalasela kunye nokulandela iindlela ezifanelekileyo, abaqulunqi banokwenza iibhodi zesekethe eziqinileyo nezithembekileyo ezisebenza kakuhle kwiindawo ezinoxinzelelo oluphezulu ngelixa zidibana neemfuno ze-EMI / EMC.