Copper foil yog cov khoom siv tooj liab nyias nyias. Nws tuaj yeem muab faib ua ob hom: dov (RA) tooj liab ntawv ci thiab electrolytic (ED) tooj liab ntawv ci. Copper foil muaj cov khoom siv hluav taws xob zoo thiab thermal conductivity, thiab muaj cov cuab yeej tiv thaiv hluav taws xob thiab cov teeb liab sib nqus. Copper foil yog siv ntau hauv kev tsim cov khoom siv hluav taws xob precision. Nrog rau kev nce qib ntawm kev tsim khoom niaj hnub no, qhov kev thov rau nyias, sib dua, me dua thiab ntau cov khoom siv hluav taws xob tau coj mus rau ntau yam kev siv rau tooj liab ntawv nyiaj.
Rolled copper foil yog hu ua RA copper foil. Nws yog cov khoom siv tooj liab uas yog tsim los ntawm lub cev dov. Vim nws cov txheej txheem tsim khoom, RA copper foil muaj cov qauv kheej kheej sab hauv. Thiab nws tuaj yeem hloov kho rau qhov muag muag thiab tawv nqaij los ntawm kev siv cov txheej txheem annealing. RA tooj liab ntawv ci yog siv los tsim cov khoom siv hluav taws xob high-end, tshwj xeeb tshaj yog cov uas xav tau qee qhov kev hloov pauv hauv cov khoom siv.
Electrolytic copper foil yog hu ua ED copper foil. Nws yog cov khoom siv tooj liab uas yog tsim los ntawm cov txheej txheem chemical deposition. Vim yog qhov xwm txheej ntawm cov txheej txheem tsim khoom, electrolytic tooj liab ntawv ci muaj cov qauv columnar sab hauv. Cov txheej txheem ntau lawm ntawm electrolytic tooj liab ntawv ci yog qhov yooj yim thiab siv rau hauv cov khoom uas yuav tsum tau muaj ntau cov txheej txheem yooj yim, xws li Circuit Court boards thiab lithium roj teeb tsis zoo electrodes.
RA copper foil thiab electrolytic tooj liab ntawv ci muaj lawv qhov zoo thiab qhov tsis zoo ntawm cov hauv qab no:
RA tooj liab ntawv ci yog purer nyob rau hauv cov nqe lus ntawm cov ntsiab lus tooj liab;
RA copper foil muaj kev ua tau zoo tag nrho tshaj li electrolytic tooj liab ntawv ci ntawm lub cev;
Tsis muaj qhov sib txawv me ntsis ntawm ob hom ntawv ci tooj liab raws li cov khoom siv tshuaj lom neeg;
Nyob rau hauv cov nqe lus ntawm tus nqi, ED tooj liab ntawv ci yog yooj yim rau loj tsim vim hais tias ntawm nws kuj yooj yim tsim txheej txheem thiab yog tsis tshua kim tshaj calendered tooj liab ntawv ci.
Feem ntau, RA copper foil yog siv nyob rau hauv cov theem pib ntawm kev tsim khoom, tab sis raws li cov txheej txheem tsim ua kom paub tab, ED tooj liab ntawv ci yuav siv sij hawm los txo cov nqi.
Copper foil muaj cov hluav taws xob zoo thiab thermal conductivity, thiab nws kuj muaj cov khoom tiv thaiv zoo rau cov hluav taws xob thiab cov teeb liab sib nqus. Yog li ntawd, nws feem ntau yog siv los ua qhov nruab nrab rau hluav taws xob lossis thermal conduction hauv cov khoom siv hluav taws xob thiab hluav taws xob, lossis ua cov khoom siv tiv thaiv rau qee yam khoom siv hluav taws xob. Vim tias qhov pom tseeb thiab lub cev muaj zog ntawm tooj liab thiab tooj liab alloys, lawv kuj tau siv rau hauv kev kho kom zoo nkauj architectural thiab lwm yam lag luam.
Cov khoom siv raw rau cov ntawv ci tooj liab yog tooj liab ntshiab, tab sis cov khoom siv raw yog nyob rau hauv ntau lub xeev vim muaj ntau yam txheej txheem. Rolled tooj liab ntawv nyiaj feem ntau yog tsim los ntawm electrolytic cathode tooj liab ntawv uas yog yaj thiab ces dov; Electrolytic tooj liab ntawv ci yuav tsum tau muab cov ntaub ntawv raw rau hauv sulfuric acid tov rau dissolving li tooj liab da dej, ces nws yog ntau inclined siv raw cov ntaub ntawv xws li tooj liab txhaj tshuaj los yog tooj liab xaim kom zoo dissolution nrog sulfuric acid.
Tooj liab ions muaj zog heev nyob rau hauv cov huab cua thiab tuaj yeem yooj yim hnov mob nrog oxygen ions hauv huab cua los ua tooj liab oxide. Peb kho qhov chaw ntawm cov ntawv ci tooj liab nrog rau chav sov los tiv thaiv oxidation thaum lub sij hawm tsim khoom, tab sis qhov no tsuas yog ncua sij hawm thaum cov ntawv ci tooj liab yog oxidized. Yog li ntawd, nws raug pom zoo kom siv cov ntawv ci tooj liab kom sai li sai tau tom qab tshem tawm. Thiab khaws cov ntawv ci tooj liab uas tsis siv rau hauv qhov chaw qhuav, lub teeb-pov thawj kom deb ntawm cov pa hluav taws xob tsis zoo. Qhov ntsuas kub tau pom zoo rau cov ntawv ci tooj liab yog li 25 degrees Celsius thiab cov av noo yuav tsum tsis pub tshaj 70%.
Copper foil tsis yog tsuas yog cov khoom siv hluav taws xob xwb, tab sis kuj yog cov khoom lag luam muaj txiaj ntsig zoo tshaj plaws. Copper foil muaj hluav taws xob zoo dua thiab thermal conductivity dua li cov khoom siv hlau zoo tib yam.
Copper foil daim kab xev yog feem ntau conductive ntawm tooj liab sab, thiab sab nplaum kuj tuaj yeem ua conductive los ntawm kev muab cov hmoov conductive rau hauv cov nplaum. Yog li ntawd, koj yuav tsum paub meej tias koj xav tau ib leeg-ib sab conductive tooj liab ntawv ci daim kab xev los yog ob-sided conductive tooj liab ntawv ci daim kab xev thaum lub sij hawm ntawm kev yuav khoom.
Copper foil nrog me ntsis saum npoo oxidation tuaj yeem raug tshem tawm nrog ib daim txhuam cev cawv. Yog tias nws yog lub sijhawm ntev oxidation lossis thaj tsam loj oxidation, nws yuav tsum tau muab tshem tawm los ntawm kev ntxuav nrog sulfuric acid tov.
CIVEN Hlau muaj ib daim kab xev tooj liab tshwj xeeb rau cov iav uas siv tau yooj yim heev.
Hauv kev xav, yog; Txawm li cas los xij, txij li cov khoom siv melting tsis tau ua nyob rau hauv ib puag ncig lub tshuab nqus tsev thiab cov chaw tsim khoom sib txawv siv qhov sib txawv ntawm qhov kub thiab txias thiab kev tsim cov txheej txheem, ua ke nrog qhov sib txawv ntawm qhov chaw tsim khoom, nws muaj peev xwm ua rau cov kab sib txawv sib xyaw rau hauv cov khoom thaum tsim. Yog li ntawd, txawm tias cov khoom muaj pes tsawg leeg zoo ib yam, tuaj yeem muaj xim sib txawv ntawm cov khoom los ntawm cov tuam txhab sib txawv.
Qee lub sij hawm, txawm tias cov ntaub ntawv muaj txiaj ntsig zoo ntawm cov ntaub ntawv tooj liab, cov xim ntawm cov ntawv ci tooj liab ua los ntawm cov tuam txhab sib txawv tuaj yeem sib txawv hauv qhov tsaus ntuj. Qee cov neeg ntseeg tias cov ntawv ci liab liab muaj qhov purity ntau dua. Txawm li cas los xij, qhov no tsis yog qhov tseeb vim tias, ntxiv rau cov ntsiab lus tooj liab, qhov smoothness ntawm daim ntawv tooj liab tuaj yeem ua rau cov xim sib txawv pom los ntawm tib neeg lub qhov muag. Piv txwv li, cov ntawv ci tooj liab nrog lub ntsej muag zoo nkauj yuav muaj qhov cuam tshuam zoo dua, ua rau cov xim saum npoo pom sib dua, thiab qee zaum txawm tias dawb. Nyob rau hauv kev muaj tiag, qhov no yog ib txwm tshwm sim rau tooj liab ntawv ci nrog zoo smoothness, qhia hais tias lub nto yog du thiab muaj tsawg roughness.
Electrolytic copper foil yog tsim los ntawm kev siv tshuaj, yog li cov khoom tiav tiav tsis muaj roj. Nyob rau hauv sib piv, dov tooj liab ntawv ci yog tsim los ntawm lub cev dov txoj kev, thiab thaum lub sij hawm ntau lawm, mechanical lubricating roj los ntawm cov chais yuav nyob twj ywm rau saum npoo thiab hauv cov khoom tiav. Yog li ntawd, cov txheej txheem tom qab ntxuav thiab degreasing yog tsim nyog los tshem tawm cov roj seem. Yog tias cov residues tsis raug tshem tawm, lawv tuaj yeem cuam tshuam lub tev tsis kam ntawm cov khoom tiav lawm. Tshwj xeeb tshaj yog thaum lub sij hawm kub-kub lamination, sab hauv roj residues tuaj yeem nkag mus rau saum npoo.
Qhov siab dua qhov smoothness ntawm daim ntawv tooj liab, qhov siab dua qhov kev xav, uas yuav tshwm sim dawb rau ntawm qhov muag liab qab. Ntau dua nto smoothness kuj me ntsis txhim kho cov khoom siv hluav taws xob thiab thermal conductivity. Yog tias yuav tsum muaj txheej txheem txheej tom qab, nws raug nquahu kom xaiv cov txheej txheem dej kom ntau li ntau tau. Roj-raws li txheej, vim lawv cov qauv molecular loj dua, feem ntau yuav tev tawm.
Tom qab cov txheej txheem annealing, zuag qhia tag nrho saj zawg zog thiab plasticity ntawm cov ntaub ntawv tooj liab yog txhim kho, thaum nws resistivity yog txo, txhim kho nws cov hluav taws xob conductivity. Txawm li cas los xij, cov khoom siv annealed yog qhov cuam tshuam rau khawb thiab dents thaum nws los rau hauv kev sib cuag nrog cov khoom tawv. Tsis tas li ntawd, kev vibrations me ntsis thaum lub sij hawm tsim khoom thiab kev xa khoom tuaj yeem ua rau cov khoom deform thiab tsim embossing. Yog li ntawd, kev saib xyuas ntxiv yog xav tau thaum lub sijhawm tsim khoom thiab ua tiav tom ntej.
Vim tias cov qauv thoob ntiaj teb tam sim no tsis muaj qhov tseeb thiab cov qauv kev sim thiab cov qauv rau cov khoom siv nrog lub thickness tsawg tshaj li 0.2 hli, nws yog ib qho nyuaj rau siv cov tsoos hardness qhov tseem ceeb los txhais cov mos los yog tawv lub xeev ntawm tooj liab ntawv ci. Vim qhov teeb meem no, cov tuam txhab kev lag luam tooj liab siv lub zog tensile thiab elongation kom muaj kev cuam tshuam cov khoom muag los yog lub xeev nyuaj, es tsis yog cov nqi hardness.
Annealed Copper Foil (Soft State):
- Tsawg hardness thiab siab dua ductility: Yooj yim rau txheej txheem thiab daim ntawv.
- Cov hluav taws xob conductivity zoo dua: Cov txheej txheem annealing txo cov ciam teb thiab qhov tsis xws luag.
- Zoo nto zoo: Tsim nyog ua substrate rau cov ntawv luam tawm Circuit Board (PCBs).
Semi-Hard Copper Ntawv Nyiaj:
- Nruab nrab hardness: Nws muaj peev xwm tuav tau qee yam.
- Haum rau cov ntawv thov uas xav tau qee lub zog thiab rigidity: Siv rau hauv qee yam khoom siv hluav taws xob.
Hard Copper Ntawv Nyiaj:
- Siab hardness: Tsis yooj yim deformed, haum rau cov ntawv thov uas xav tau qhov ntev.
- Tsawg ductility: Yuav tsum muaj kev saib xyuas ntau dua thaum ua tiav.
Lub zog tensile thiab elongation ntawm cov ntawv ci tooj liab yog ob qho tseem ceeb ntawm lub cev kev ua tau zoo uas muaj kev sib raug zoo thiab cuam tshuam ncaj qha rau qhov zoo thiab kev ntseeg siab ntawm cov ntawv ci tooj liab. Lub zog tensile hais txog lub peev xwm ntawm cov ntawv ci tooj liab los tiv thaiv kev tawg hauv lub zog tensile, feem ntau hais hauv megapascals (MPa). Elongation yog hais txog lub peev xwm ntawm cov khoom siv los ua cov yas deformation thaum lub sij hawm ncab, qhia raws li feem pua.
Lub zog tensile thiab elongation ntawm tooj liab ntawv ci yog cuam tshuam los ntawm ob qho tib si thickness thiab grain loj. Txhawm rau piav qhia txog qhov loj me no, qhov dimensionless thickness-rau-grain loj piv (T / D) yuav tsum tau qhia ua qhov sib piv. Lub zog tensile sib txawv nyob rau hauv txawv thickness-rau-grain loj piv, thaum elongation txo qis raws li thickness txo thaum lub thickness-rau-grain loj piv yog tas li.