I-PCB licandelo elibalulekileyo lombane kunye nemvelaphi yawo onke amacandelo e-elektroniki.Iye yantsonkotha ngakumbi ukususela oko yavela kwihlabathi lokugqibela.Ukusuka kwi-single-layer ukuya kwi-double-layer, i-four-layer, kwaye emva koko ukuya kwi-multi-layer, ubunzima bokuyila buyanda.inkulu.Kukho i-wiring kumacala omabini ephaneli ephindwe kabini, eluncedo kakhulu ukuba siqonde kwaye siqonde umgaqo wayo wocingo.Makhe sijonge umgaqo wocingo wePCB kabini ibhodi.
I-PCB yomhlaba ibhodi ephindwe kabini iyilwe ngohlobo locingo olujikeleze imilo yebhokisi, oko kukuthi, icala le-PCB lihambelana ngakumbi emhlabeni, kwaye elinye icala yibhodi yokukopisha ucingo oluthe nkqo, kwaye ke badityanisiwe. nge-metalized vias (ukumelana nomngxuma kuncinci).
Ukuqwalasela ukuba kufuneka kubekho ucingo oluphantsi kufuphi ne-IC chip nganye, ngokuqhelekileyo ucingo oluphantsi lwenziwa rhoqo nge-1 ~ 115cm, eya kwenza indawo ye-loop yesignali ibencinci kwaye incede ukunciphisa imitha.Indlela yoyilo lwenethiwekhi kufuneka ibe phambi komgca wesignali, ngaphandle koko kunzima ukuphumeza.
Umgaqo wocingo womgca wophawu:
Emva kokuba ubeko olufanelekileyo lwamacandelo lugqitywe, lulandelwa yibhodi ephindwe kabini, emva koko ukuyilwa kocingo lokukhusela umhlaba, kwaye emva koko iingcingo ezibalulekileyo (ucingo olubuthathaka, ucingo oluphezulu kunye nocingo oluqhelekileyo ngasemva).Iingcingo ezibalulekileyo kufuneka zibe namandla ahlukeneyo, imbuyekezo yomhlaba, iingcingo kwaye ibe mfutshane kakhulu, ngoko ngamanye amaxesha umhlaba okufutshane nocingo olubalulekileyo usondele kucingo lomqondiso ukwenzela ukuba i-loop encinci yokusebenza ingenziwa.
Ibhodi enemigangatho emine inomphezulu ophindwe kabini, kwaye i-bottom yebhodi yocingo ngumgca wesignali.Okokuqala, i-crystal cloth ye-key, i-crystal circuit, i-clock circuit, umgca wesignali kunye nezinye ii-CPU kufuneka zihambelane nomgaqo wendawo encinci yokuhamba ngokusemandleni.
Xa ipleyiti yoshicilelo wesekethe IC isebenza, indawo yojikelezo ukhankanywa amaxesha amaninzi, nto leyo eneneni ingqiqo umahluko kwimo yemitha.Okufana nenkcazo yendlela yokwahlukana kwemitha: ukuhamba kwesekethe esebenzayo ngoku kwisekethe yomqondiso, kunye nelophu yomqondiso iya kuvelisa imitha ye-electromagnetic radiation, ebangelwa yimowudi yokwahluka kwangoku, ngoko ke imowudi yokwahlukana komqondiso kuthiwa yenziwe yimitha. imitha yemitha, kunye nobunzulu bendawo yokusasazeka Ifomula yokubala yile: E1 = K1, f2, ia/gamma
Uhlobo: I-E1 - ibhodi yokukopa yemodi yokwahlula, amandla ebala legesi ye-gamma yendawo yesekethe ye-PCB inokubonwa ngefomula yokukhanya kwemo yokwahlukana, amandla ebala lemitha alingana nef2 yokusebenza, indawo yokujikeleza, kunye nokusebenza ngoku, njengexesha lokumisela umsebenzi I-frequency f kunye nobungakanani bendawo yokuhamba zizinto eziphambili esinokuzilawula ngokuthe ngqo kuyilo.Kwangaxeshanye, okoko nje umsebenzi wokuqukuqela udibana nokuthembeka, isantya, kunye nekhoyo ngoku, kokukhona kusiba ngcono, ukubetha kancinci kumda wesiginali, kokukhona icandelo le-harmonic, ngokukhona libanzi, liphezulu i-electromagnetic. imitha, kufuneka iboniswe (ngasentla) amandla amakhulu ombane wayo, esingafuniyo.
Ukuba kunokwenzeka, rhangqa imidibaniso ebalulekileyo ngocingo oluphantsi.Xa uhambisa ibhodi yekopi ye-PCB enye emva kwenye, iingcingo zomhlaba ezikhoyo zigubungela zonke izikhewu, kodwa kufuneka kuthathelwe ingqalelo kuzo zonke ezi ngcingo zomhlaba, imihlaba iya kwenza ukudibanisa okufutshane kunye nobukhulu obuphantsi be-impedance, obunokufumana iziphumo ezilungileyo (Qaphela: Kukho imfuno yendawo ekufuneka ihlangatyezwane neemeko, ezinje nge-creepage distances).
Ixesha lokuposa: Jun-09-2022