Eyona mathiriyeli ingundoqo esetyenziswa kwiiPCBs yiifoyile yobhedu, esetyenziselwa ukuhambisa imiqondiso kunye nemisinga. Kwangaxeshanye, ifoyile yobhedu kwi-PCBs inokusetyenziswa njengenqwelomoya yokukhangela ukulawula uthintelo lomgca wothumelo, okanye njengekhaka lokucinezela ukuphazamiseka kwe-electromagnetic (EMI). Ngexesha elifanayo, kwinkqubo yokuvelisa i-PCB, amandla e-peel, ukusebenza kwe-etching kunye nezinye iimpawu ze-foil yobhedu ziya kuchaphazela umgangatho kunye nokuthembeka kokuveliswa kwe-PCB. Iinjineli zoLuhlu lwePCB kufuneka ziqonde ezi mpawu ukuze kuqinisekiswe ukuba inkqubo yokwenziwa kwePCB inokuqhutywa ngempumelelo.
Ifoyile yobhedu yeebhodi zesekethe eziprintiweyo zinefoyile yobhedu ye-electrolytic (i-electrodeposited ED copper foil) kunye nefoyile yobhedu enealeded (rolled annealed RA ifoyile yobheduIindidi ezimbini, eyokuqala ngendlela yokwenziwa kwe-electroplating, eyokugqibela ngokusebenzisa indlela yokuvelisa. KwiiPCB eziqinileyo, iifoyile zobhedu ze-electrolytic zisetyenziswa ikakhulu, ngelixa iifoyile zobhedu eziqengqelekisiweyo zisetyenziswa ikakhulu kwiibhodi zesekethe eziguquguqukayo.
Ukusetyenziswa kwiibhodi zeesekethe eziprintiweyo, kukho umehluko omkhulu phakathi kwe-electrolytic kunye ne-calendered copper foil. Iifoyile zobhedu ze-Electrolytic zineempawu ezahlukileyo kwiindawo zazo zombini, oko kukuthi, uburhabaxa beendawo ezimbini zefoyile azifani. Njengoko ii-frequencies zesiphaluka kunye namazinga anyuka, iimpawu ezithile zeefoyile zobhedu zinokuchaphazela ukusebenza kwe-millimeter wave (mm Wave) frequency kunye ne-high speed digital (HSD) iisekethe. Uburhabaxa bomphezulu wefoyile yobhedu bunokuchaphazela ilahleko yokufaka iPCB, ukufana kwesigaba, kunye nokulibaziseka kokusasazwa. Uburhabaxa bomphezulu wefoyile yobhedu kunokubangela iiyantlukwano ekusebenzeni ukusuka kwiPCB ukuya kwenye kunye nokwahluka ekusebenzeni kombane ukusuka kwiPCB ukuya kwenye. Ukuqonda indima yeefoyile zobhedu ekusebenzeni okuphezulu, iisekethe ezihamba ngesantya esiphezulu zinokunceda ukulungelelanisa kunye nokulinganisa ngokuchanekileyo inkqubo yokuyila ukusuka kwimodeli ukuya kwisekethe yangempela.
Uburhabaxa bomphezulu befoyile yobhedu bubalulekile kwimveliso yePCB
Iprofayili yomhlaba erhabaxa inceda ukuqinisa ukunamathela kwefoyile yobhedu kwinkqubo yeresin. Nangona kunjalo, inkangeleko yomphezulu erhabaxa inokufuna amaxesha amade wokukrolwa, nto leyo enokuchaphazela imveliso yebhodi kunye nokuchaneka kwepateni yomgca. Ukonyuka kwexesha lokurhweba kuthetha ukonyuka kwamacala okubamba umqhubi kunye necala elibi kakhulu le-conductor. Oku kwenza ukwenziwa komgca ocolekileyo kunye nolawulo lwe-impedance lube nzima ngakumbi. Ukongeza, isiphumo soburhabaxa befoyile yobhedu ekunciphiseni umqondiso kuya kubonakala njengoko i-frequency yokusebenza yesekethe ikhula. Kwiifrikhwensi eziphezulu, imiqondiso emininzi yombane ihanjiswa kumphezulu we-conductor, kwaye indawo erhabaxa ibangela ukuba umqondiso uhambe umgama omde, okukhokelela ekunciphiseni okanye ekulahlekeni okukhulu. Ke ngoko, ii-substrates ezisebenza ngokuphezulu zifuna iifoyile zobhedu ezinoburhabaxa obuphantsi kunye nokubambelela okwaneleyo ukuze zihambelane neenkqubo eziphezulu ze-resin.
Nangona izicelo ezininzi kwi-PCBs namhlanje zineengqimba zobhedu ze-1/2oz (malunga ne-18μm), i-1oz (malunga ne-35μm) kunye ne-2oz (malunga ne-70μm), izixhobo eziphathwayo ngomnye wemiba yokuqhubela phambili ukutyeba kobhedu kwe-PCB ukuba kubhitye njenge. 1μm, ngelixa kwelinye icala ubukhulu bobhedu be-100μm okanye ngaphezulu buya kubaluleka kwakhona ngenxa yezicelo ezitsha (umzekelo, i-elektroniki yemoto, ukukhanya kwe-LED, njl.). .
Kwaye kunye nokuphuhliswa kwamaza e-5G millimeter kunye ne-high-speed serial links, imfuno yeefoyile zobhedu ezineeprofayili ezisezantsi ezinqabileyo zikhula ngokucacileyo.
Ixesha lokuposa: Apr-10-2024