1. Uyilo lwecandelo
Uyilo luhambelana neemfuno zeskimu sombane kunye nobukhulu bamacandelo, amacandelo alungelelaniswa kwaye acwangciswe ngokucocekileyo kwi-PCB, kwaye angakwazi ukuhlangabezana neemfuno zomatshini kunye nombane wokusebenza komatshini.Ubeko olufanelekileyo okanye aluchaphazeli kuphela ukusebenza kunye nokuthembeka kwendibano yePCB kunye nomatshini, kodwa ikwachaphazela iPCB kunye nokusetyenzwa kwayo kwendibano kunye nokugcinwa kweqondo lobunzima, ngoko zama ukwenza oku kulandelayo xa ubeko:
Ukuhanjiswa okulinganayo kwamacandelo, iyunithi efanayo yamacandelo esekethe kufuneka ilungelelaniswe ngokuthe ngqo, ukwenzela ukuba kube lula ukulungisa iimpazamo kunye nokugcinwa.
Izixhobo ezinonxibelelwano kufuneka zicwangciswe ngokusondeleleneyo ukuze zincede ukuphucula ukuxinana kweengcingo kunye nokuqinisekisa owona mgama umfutshane phakathi kolungelelwaniso.
Amacandelo angenawo ubushushu, ilungiselelo kufuneka libe kude kumacandelo avelisa ubushushu obuninzi.
Amacandelo anokuba nokuphazamiseka kwe-electromagnetic omnye komnye kufuneka athathe amanyathelo okukhusela okanye okuzahlula.
2. Imigaqo yocingo
I-wiring ihambelana nomzobo weskimu sombane, itafile yomqhubi kunye nesidingo sobubanzi kunye nesithuba socingo oluprintiweyo, i-wiring kufuneka ihambelane nale migaqo ilandelayo:
Kwisiseko sokuhlangabezana neemfuno zokusetyenziswa, i-wiring ingaba lula xa ingekho nzima ukukhetha ukulandelelana kweendlela zocingo kwi-single-layer layer double → i-multi-layer.
Iingcingo phakathi kwamacwecwe amabini okudibanisa zibekwe mfutshane kangangoko kunokwenzeka, kwaye iimpawu ezibucayi kunye neempawu ezincinci zihamba kuqala ukunciphisa ukulibaziseka kunye nokuphazamiseka kweempawu ezincinci.Umgca wegalelo lesekethe ye-analog kufuneka ibekwe ecaleni kwesikhuselo socingo lomhlaba;umgangatho ofanayo woyilo lwecingo kufuneka usasazwe ngokulinganayo;indawo conductive kumaleko ngamnye kufuneka ilungelelene ngokwentelekiso ukuthintela ibhodi ukusuka warping.
Imigca yesignali yokutshintsha indlela kufuneka ihambe ngediagonal okanye inguqu egudileyo, kwaye iradiyasi enkulu yegophe ilungile ukunqanda ugxininiso lwebala lombane, ukubonakalisa umqondiso kunye nokuvelisa i-impedance eyongezelelweyo.
Iisekethe zeDijithali kunye neesekethe ze-analog kwiingcingo kufuneka zohlulwe ukuthintela ukuphazamiseka okulinganayo, okufana kuluhlu olufanayo kufuneka kube yinkqubo yomhlaba yeesekethe ezimbini kwaye iingcingo zenkqubo yonikezelo lwamandla zibekwe ngokwahlukileyo, imigca yomqondiso yeefrikhwensi ezahlukeneyo kufuneka ibekwe. embindini wokwahlulwa kocingo lomhlaba ukuphepha ukuphambana.Ukuze kube lula ukuvavanya, uyilo kufuneka lusete iindawo zokuphumla eziyimfuneko kunye namanqaku ovavanyo.
Amacandelo esekethe asekelwe, axhunywe kumandla ombane xa ukulungelelaniswa kufuneka kube mfutshane kangangoko ukunciphisa ukuchasana kwangaphakathi.
Uluhlu oluphezulu kunye nezantsi kufuneka lube yi-perpendicular komnye nomnye ukunciphisa ukudibanisa, musa ukulungelelanisa iileyile eziphezulu kunye nezantsi okanye zihambelanayo.
I-High-speed circuit ye-I / O imigca emininzi kunye ne-amplifier yokwahlukana, i-balanced amplifier circuit IO ubude bomgca kufuneka bulingane nokuphepha ukulibaziseka okungadingekile okanye ukutshintshwa kwesigaba.
Xa i-solder pad idibaniswe kwindawo enkulu yendawo yokuqhubela phambili, ucingo oluncinci lobude obungekho ngaphantsi kwe-0.5mm kufuneka lusetyenziswe ukuhlukaniswa kwe-thermal, kwaye ububanzi bocingo oluncinci akufanele lube ngaphantsi kwe-0.13mm.
Ucingo olusondeleyo kumda webhodi, umgama ukusuka kumda webhodi eprintiweyo kufuneka ube mkhulu kune-5mm, kwaye ucingo lomhlaba lunokusondela kumda webhodi xa kufuneka.Ukuba ukusetyenzwa kwebhodi eprintiweyo ukuba ifakwe kwisikhokelo, ucingo oluvela emphethweni webhodi kufuneka lube lukhulu ubuncinane kunomgama wesikhokelo sobunzulu be-slot.
Ibhodi enamacala amabini kwiintambo zombane zoluntu kunye neengcingo zokumisa, kangangoko kunokwenzeka, zibekwe kufutshane nomphetho webhodi, kwaye zisasazwe ebusweni bebhodi.Ibhodi ye-Multilayer inokusekwa kuluhlu lwangaphakathi lomgangatho wonikezelo lwamandla kunye nomgangatho womhlaba, ngokusebenzisa umngxuma owenziwe ngesinyithi kunye nomgca wamandla kunye nokudibanisa ucingo lomhlaba kwinqanaba ngalinye, umaleko wangaphakathi wendawo enkulu yocingo kunye nomgca wombane, umhlaba. ucingo kufuneka lwenziwe njengomnatha, lunokuphucula amandla okudibanisa phakathi kweengqimba zebhodi ye-multilayer.
3. Ububanzi bocingo
Ububanzi bocingo oluprintiweyo luchongwa ngumthwalo wangoku wocingo, ukunyuka kweqondo lokushisa elivumelekileyo kunye nokunamathela kwi-foil yobhedu.Ububanzi bocingo lwebhodi eprintiweyo ngokubanzi olungekho ngaphantsi kwe-0.2mm, ubukhulu be-18μm okanye ngaphezulu.I-wire thinner, kunzima ngakumbi ukuyiqhuba, ngoko kwindawo yocingo ivumela iimeko, kufuneka zifaneleke ukukhetha ucingo olubanzi, imigaqo yoyilo eqhelekileyo ilandelayo:
Imigca yemiqondiso kufuneka ibe nobukhulu obufanayo, obulungele ukuhambelana kwe-impedance, ububanzi bomgca ocetyiswayo ngokubanzi we-0.2 ukuya kwi-0.3mm (812mil), kunye nomhlaba wamandla, indawo enkulu yokulungelelanisa ingcono ukunciphisa ukuphazamiseka.Kwiimpawu ze-high-frequency, kukulungele ukukhusela umgca womhlaba, onokuphucula umphumo wokuhambisa.
Kwiisekethe zesantya esiphezulu kunye neesekethe ze-microwave, i-impedance yeempawu ezichaziweyo zomgca wothumelo, xa ububanzi kunye nobukhulu bocingo kufuneka buhlangabezane neemfuno ze-impedance yeempawu.
Kuyilo lwesekethe yamandla aphezulu, ukuxinana kwamandla kufuneka kwakhona kuthathelwe ingqalelo ngeli xesha kufuneka kuthathelwe ingqalelo ububanzi bomgca, ubukhulu kunye neempawu ze-insulation phakathi kwemigca.Ukuba umqhubi wangaphakathi, ukuxinana kwangoku okuvunyelweyo malunga nesiqingatha somqhubi wangaphandle.
4. Izithuba zocingo eziprintiweyo
Ukumelana nokugquma phakathi kweebhodi eziprintiweyo zomphezulu webhodi kumiselwa yisithuba socingo, ubude bamacandelo anxuseneyo eingcingo ezikufutshane, i-insulation media (kubandakanywa i-substrate kunye nomoya), kwindawo yokubiyela ivumela iimeko, kufuneka zifaneleke ukunyusa isithuba socingo. .
Ixesha lokuposa: Feb-18-2022