PCB Base Khoom - Copper Foil

Cov khoom tseem ceeb ntawm cov khoom siv hauv PCBs yogtooj liab ntawv ci, uas yog siv los xa cov teeb liab thiab tam sim no.Nyob rau tib lub sijhawm, cov ntawv ci tooj liab ntawm PCBs kuj tuaj yeem siv los ua lub dav hlau siv los tswj cov impedance ntawm cov kab sib kis, lossis ua ib daim ntaub thaiv kom tsis txhob cuam tshuam electromagnetic cuam tshuam (EMI).Nyob rau tib lub sijhawm, hauv cov txheej txheem tsim khoom ntawm PCB, lub tev lub zog, etching kev ua tau zoo thiab lwm yam ntawm cov ntawv ci tooj liab tseem yuav cuam tshuam rau qhov zoo thiab kev ntseeg siab ntawm PCB manufacturing.PCB Layout engineers yuav tsum nkag siab cov yam ntxwv no kom paub meej tias cov txheej txheem tsim khoom PCB tuaj yeem ua tiav.

Copper foil rau cov ntawv luam tawm Circuit Court boards muaj electrolytic tooj liab ntawv ci (electrodeposited ED tooj liab ntawv ci) thiab calendered annealed tooj liab ntawv ci (dov annealed RA tooj liab ntawv ci) ob hom, yav dhau los los ntawm txoj kev electroplating ntawm kev tsim, tom kawg los ntawm txoj kev dov ntawm kev tsim khoom.Nyob rau hauv nruj PCBs, electrolytic tooj liab foils yog tsuas yog siv, thaum dov annealed tooj liab foils yog tsuas yog siv rau cov yooj yim Circuit Court boards.

Rau cov ntawv thov hauv cov ntawv luam tawm, muaj qhov sib txawv tseem ceeb ntawm electrolytic thiab calendered tooj liab foils.Electrolytic copper foils muaj cov yam ntxwv sib txawv ntawm lawv ob qhov chaw, piv txwv li, qhov roughness ntawm ob qhov chaw ntawm cov ntawv ci tsis zoo ib yam.Raws li Circuit Court zaus thiab cov nqi nce, cov yam ntxwv tshwj xeeb ntawm cov ntawv ci tooj liab yuav cuam tshuam rau kev ua haujlwm ntawm millimeter yoj (mm Wave) zaus thiab kev kub ceev digital (HSD) circuits.Copper foil deg roughness tuaj yeem cuam tshuam rau PCB qhov poob, theem tsis sib xws, thiab kev nthuav tawm qeeb.Copper foil nto roughness tuaj yeem ua rau muaj kev hloov pauv hauv kev ua tau zoo ntawm ib qho PCB mus rau lwm qhov nrog rau kev hloov pauv hauv hluav taws xob ua haujlwm ntawm ib qho PCB mus rau lwm qhov.Kev nkag siab txog lub luag haujlwm ntawm tooj liab foils hauv kev ua haujlwm siab, kev kub ceev circuits tuaj yeem pab txhim kho thiab ua kom raug ntau dua simulate cov txheej txheem tsim los ntawm cov qauv mus rau qhov tseeb Circuit Court.

Nto roughness ntawm tooj liab ntawv ci yog ib qho tseem ceeb rau PCB manufacturing

Ib qho kev ntxhib ntxhib ntawm qhov profile yuav pab ntxiv dag zog rau qhov adhesion ntawm cov ntawv ci tooj liab mus rau qhov system resin.Txawm li cas los xij, qhov rougher deg profile yuav xav tau lub sij hawm etching ntev dua, uas tuaj yeem cuam tshuam rau cov khoom lag luam thiab cov kab qauv raug.Lub sij hawm ntxiv etching txhais tau hais tias muaj zog ntxiv rau sab etching ntawm tus neeg xyuas pib thiab qhov hnyav dua sab etching ntawm tus neeg xyuas pib.Qhov no ua rau cov kab zoo fabrication thiab impedance tswj nyuaj dua.Tsis tas li ntawd, cov nyhuv ntawm tooj liab ntawv roughness ntawm lub teeb liab attenuation yuav tshwm sim raws li lub Circuit Court ua hauj lwm zaus nce.Ntawm cov zaus ntau dua, cov teeb liab hluav taws xob ntau dua raug xa mus los ntawm qhov chaw ntawm tus neeg xyuas pib, thiab qhov rougher nto ua rau lub teeb liab mus ntev dua, ua rau muaj kev cuam tshuam ntau dua lossis poob.Yog li ntawd, high-performance substrates yuav tsum tsis tshua muaj roughness tooj liab foils nrog txaus adhesion kom phim high-performance resin systems.

Txawm hais tias feem ntau cov ntawv thov ntawm PCBs niaj hnub no muaj tooj liab tuab ntawm 1/2oz (kwv yees 18μm), 1oz (kwv yees 35μm) thiab 2oz (kwv yees 70μm), cov khoom siv txawb yog ib qho ntawm cov tsav tsheb rau PCB tooj liab thicknesses kom nyias li nyias. 1μm, thaum ntawm qhov tod tes, tooj liab thicknesses ntawm 100μm los yog ntau dua yuav tseem ceeb dua vim cov ntawv thov tshiab (xws li automotive electronics, LED teeb pom kev zoo, thiab lwm yam)..

Thiab nrog rau txoj kev loj hlob ntawm 5G millimeter nthwv dej nrog rau kev sib txuas ceev ceev, qhov kev thov rau tooj liab foils nrog qis roughness profiles yog kom meej meej nce.