Ibhodi yePCB inomaleko omnye, iileya ezimbini kunye neengqimba ezininzi, phakathi kwazo akukho mda kwinani leengqimba zebhodi ye-multilayer. Okwangoku, kukho ngaphezu kwe-100 iileya ze-PCB, kwaye i-multilayer PCB eqhelekileyo inamaleko amane kunye nemigangatho emithandathu. Ke kutheni abantu besithi, "Kutheni iPCB ine-multilayers ubukhulu becala?" Umbuzo? Namaleko aneenzuzo ezininzi kuneeleya ezingaqhelekanga.
1. Iindleko eziphantsi
Ngenxa yomaleko omnye wemidiya kunye nefoil, iindleko zemathiriyeli ekrwada yeebhodi zePCB ezinamanani angaqhelekanga zingaphantsi kancinane kunezo zeebhodi zePCB ezinamanani. Nangona kunjalo, iindleko zokusetyenzwa kwe-Odd-layer ye-PCB iphezulu kakhulu kune-PCB ye- even-layer.
Odd-layer PCB kufuneka yongeze inkqubo yendibaniselwano engundoqo elaminated esisiseko ngokwesiseko senkqubo yesakhiwo senyukliya.Xa kuthelekiswa nolwakhiwo lwenyukliya, ukusebenza kakuhle kwemveliso yomzi-mveliso enefoyile yokugquma ngaphandle kwesakhiwo senyukliya kuya kuncipha. phambi kokuba i-laminating, eyandisa umngcipheko wokukrazula kunye neempazamo ze-etch kumaleko angaphandle.
2. Isakhiwo sokulinganisela ukuphepha ukugoba
Esona sizathu silungileyo sokuyila i-PCBS ngaphandle kweemaleko ezinamanani angaqhelekanga kukuba iileya ezinamanani anqabileyo kulula ukugoba.Xa i-PCB ipholile emva kwenkqubo yokudibanisa isekethe ye-multi-layer, i-laminating tension eyahlukeneyo phakathi kwesakhiwo esingundoqo kunye ne-foil-coated structure iya kubangela ukugoba kwe-PCB. Njengoko ubukhulu bebhodi bukhula, umngcipheko wokugoba i-PCB edibeneyo kunye nezakhiwo ezimbini ezahlukeneyo ziyanyuka.Isitshixo ekupheliseni ukugoba kwebhodi yesiphaluka kukusebenzisa i-layer elinganisiweyo.Nangona iqondo elithile lokugoba i-PCB lihlangabezana neemfuno ezichaziweyo, ukusebenza kakuhle kokucubungula okulandelayo iya kuncitshiswa, kubangele ukunyuka kweendleko.Ngenxa yokuba indibano idinga izixhobo ezikhethekileyo kunye nenkqubo, ukuchaneka kokubekwa kwamacandelo kuyancitshiswa, ngoko kuya kuwonakalisa umgangatho.
Guqula lula ukuqonda ngakumbi: kwinkqubo yeteknoloji PCB, ibhodi umaleko ezine kungcono kunolawulo lwebhodi umaleko ezintathu, ingakumbi ngokwemiqathango symmetry, isidanga warp yebhodi umaleko ezine zingalawulwa phantsi 0.7% (IPC600 standard), kodwa i ezintathu umaleko ibhodi ubukhulu, izidanga warp ziya kudlula umgangatho, oku kuya kuchaphazela SMT kunye nokuthembeka yonke imveliso, ngoko ke umyili jikelele, hayi inani elingaqhelekanga loyilo ibhodi umaleko, nokuba imisebenzi umaleko odd, iya kuba eyenzelwe inkohliso umaleko nkqu, i-5 uyilo 6 umaleko, umaleko 7 8 umaleko ibhodi.
Ngenxa yezi zizathu zingentla, uninzi lwe-PCB i-multilayers ziyilwe njengeeleya ezilinganayo, kunye neeleya ezingaqhelekanga zincinci.