Iindidi zePCB yeCopper yeFoil yoYilo oluQhelekileyo oluPhezulu

Ishishini lemathiriyeli yePCB lichithe ixesha elininzi lokuphuhlisa izixhobo ezibonelela ngelahleko yophawu olusezantsi kunokwenzeka.Kwisantya esiphezulu kunye noyilo oluphezulu lwefrikhwensi, ilahleko iya kunciphisa umgama wokusasazwa komqondiso kunye nemiqondiso egqwethekileyo, kwaye iya kudala ukutenxa kwe-impedance okunokubonwa kwimilinganiselo ye-TDR.Njengoko siyila nayiphi na ibhodi yesekethe eprintiweyo kwaye siphuhlisa iisekethe ezisebenza kumaza aphezulu, kunokuhenda ukukhetha ubhedu olugudileyo kulo lonke uyilo olwenzayo.

PCB COPPER FOIL (2)

Ngelixa kuyinyani ukuba uburhabaxa bobhedu budala ukutenxa okongeziweyo kunye nelahleko, ingaba ifoyile yakho yobhedu ifuna ukuba lula kangakanani?Ngaba zikhona iindlela ezilula onokuzisebenzisa ukoyisa ilahleko ngaphandle kokukhetha ubhedu olugudileyo kuyilo ngalunye?Siza kujonga la manqaku kweli nqaku, kwakunye nento onokuyijonga xa uqala ukuthengela izixhobo zokupakisha zePCB.

Iintlobo zeI-PCB ye-Copper Foil

Ngokuqhelekileyo xa sithetha ngobhedu kwizinto zePCB, asithethi ngohlobo oluthile lobhedu, sithetha kuphela ngoburhabaxa balo.Iindlela ezahlukeneyo zokubeka ubhedu zivelisa iifilimu ezinamaxabiso ahlukeneyo okurhabaxa, anokwahlulwa ngokucacileyo kumfanekiso we-electron microscope (SEM) wokuskena.Ukuba uza kusebenza kumaza aphezulu (aqhele ukuba yi-5GHz WiFi okanye ngaphezulu) okanye ngesantya esiphezulu, ngoko ke qwalasela uhlobo lobhedu oluxelwe kwidatha yedatha yakho.

Kwakhona, qiniseka ukuba uyayiqonda intsingiselo yamaxabiso kaDkt kwidatha yedatha.Bukela le ngxoxo yepodcast kunye noJohn Coonrod ovela kuRogers ukufunda ngakumbi malunga nokucaciswa kukaDkt.Unaloo nto engqondweni, makhe sijonge ezinye iintlobo ezahlukeneyo PCB ifoyile yobhedu.

Electrodeposited

Kule nkqubo, i-drum iphonswa ngesisombululo se-electrolytic, kwaye i-electrodeposition reaction isetyenziselwa "ukukhulisa" i-foil yobhedu kwi-drum.Njengoko igubu lijikeleza, ifilimu yobhedu ephumayo isongela ngokucothayo kwirola, inika icwecwe lobhedu eliqhubekayo elinokuthi kamva liqengqeleke kwi-laminate.Icala legubu lobhedu liya kuhambelana noburhabaxa begubu, ngelixa icala eliveziweyo liya kuba rhabaxa kakhulu.

Electrodeposited PCB ifoyile yobhedu

Electrodeposited copper production.
Ukuze isetyenziswe kwinkqubo yokwenziwa kwe-PCB eqhelekileyo, icala elirhabaxa lobhedu liya kuqala lidityaniswe kwi-glass-resin dielectric.Ubhedu olushiyekileyo (icala legubu) luya kufuna ukwenziwa rhabaxa ngabom ngokwekhemikhali (umz., ngokukrolwa kweplasma) phambi kokuba isetyenziswe kwinkqubo yokwalamisa ngentsimbi yobhedu.Oku kuya kuqinisekisa ukuba inokudityaniswa kumaleko olandelayo kugcino lwePCB.

ICopper ene-Electrodeposited phezu komhlaba

Andazi elona gama lifanelekileyo elibandakanya zonke iintlobo ezahlukeneyo zokunyangwa komphezuluiifoyile zobhedu, ngaloo ndlela isihloko singasentla.Ezi zixhobo zobhedu zaziwa kakhulu njengeefoyile eziphathwayo, nangona ezinye iinguqulelo ezimbini zikhoyo (jonga ngezantsi).

Iifoyile eziphathwayo ezibuyiselwe umva zisebenzisa unyango olungaphezulu oluthi lusetyenziswe kwicala eligudileyo (icala legubu) lephepha le-electrodeposited copper sheet.Umaleko wonyango yityabeka nje ebhityileyo erhabaxa ngabom ubhedu, ngoko iya kuba nokuncamathela okukhulu kwisixhobo se-dielectric.Olu nyango lukwasebenza njengesithintelo se-oxidation esithintela ukubola.Xa olu bhedu lusetyenziselwa ukwenza iipaneli ze-laminate, icala eliphathwayo libophelelwe kwi-dielectric, kwaye icala eliseleyo lihlala libonakaliswe.Icala eliveziweyo aliyi kufuna nayiphi na i-roughening eyongezelelweyo phambi kokukrolwa;iya kuba sele inamandla awoneleyo okubophelela kumaleko olandelayo kugcino lwePCB.

PCB COPPER FOIL (4)

Izahluko ezintathu kwifoyile yobhedu enyangweni ibandakanya:

Ubude obuphezulu beqondo lokushisa (HTE) ifoyile yobhedu: Le yifoyile yobhedu ene-electrodeposited ehambelana ne-IPC-4562 yeBanga lesi-3.Ubuso obuvezwayo bukwaphathwa ngesithintelo se-oxidation ukuthintela ukubola ngexesha lokugcinwa.
I-foil ephindwe kabini: Kulo mfanekiso wobhedu, unyango lusetyenziswa kumacala omabini efilimu.Le nto ngamanye amaxesha ibizwa ngokuba yi-drum-side foil ephathwayo.
Ubhedu oluxhathisayo: Oku akuqhelekanga ukuhlelwa njengobhedu olucociwe phezulu.Le foyile yobhedu isebenzisa i-metallic coating phezu kwecala le-matte lobhedu, elithi ke libe rhabaxa ukuya kwinqanaba elifunekayo.
Ukusetyenziswa kwonyango lwangaphezulu kwezi zixhobo zobhedu zichanekile: i-foil iqengqeleka ngeebhafu ezongezelelweyo ze-electrolyte ezisebenzisa i-plating yobhedu yesibini, ilandelwa ngumqobo wembewu yesithintelo, kwaye ekugqibeleni i-anti-tarnish layer.

PCB ifoyile yobhedu

Iinkqubo zokunyanga ubuso kwiifoyile zobhedu.[Umthombo: uPytel, uSteven G., et al."Uhlalutyo lwezonyango zobhedu kunye nemiphumo ekusasazeni umqondiso."Kwi-2008 i-58 ye-Electronic Components kunye neNkomfa yeTekhnoloji, iphepha 1144-1149.IEEE, 2008.]
Ngezi nkqubo, unezinto eziphathekayo ezinokusetyenziswa ngokulula kwinkqubo yokwenziwa kwebhodi eqhelekileyo kunye nokulungiswa okuncinci okongeziweyo.

Ubhedu Oluqengqelelweyo

Iifoyile zobhedu ezigoqiweyo ziya kudlula umqulu wefoyile yethusi ngokusebenzisa i-roller, eya kubanda i-copper-roll sheet ukuya kubukhulu obufunwayo.Ubunzima bephepha le-foil elibangelwayo liya kuhluka ngokuxhomekeke kwiiparamitha ezijikelezayo (isantya, uxinzelelo, njl.).

 

PCB COPPER FOIL (1)

Iphepha eliphumelayo linokuba lula kakhulu, kwaye i-striations ibonakala kumphezulu wephepha le-copper edibeneyo.Imifanekiso engezantsi ibonisa uthelekiso phakathi kwe-electrodeposited copper foil kunye ne-rolled-annealed foil.

PCB ifoyile yobhedu uthelekiso

Ukuthelekiswa kwe-electrodeposited vs.
ICopper eneProfayile ephantsi
Oku akunyanzelekanga ukuba luhlobo lwefoyile yobhedu onokuthi uyenze ngenye inkqubo.Ubhedu olusezantsi luyi-electrodeposited copper ephathwayo kwaye iguqulwe ngenkqubo ye-micro-roughening ukubonelela uburhabaxa obusezantsi kakhulu obunoburhabaxa obaneleyo bokuncamathelisa kwi-substrate.Iinkqubo zokwenza ezi foyile zobhedu zikholisa ukuba zezabantu.Ezi foil zihlala zihlelwa njenge-ultra-low profile (ULP), iprofayili ephantsi kakhulu (VLP), kunye neprofayile ephantsi (LP, malunga ne-1 micron eyi-avareji yoburhabaxa).

 

Amanqaku ayeleleneyo:

Kutheni iFoil yobhedu isetyenziswa kwiPCB Manufacturing?

Ifoyile yobhedu esetyenziswa kwiBhodi yeSekethe eprintiweyo


Ixesha lokuposa: Jun-16-2022