Cov khoom tseem ceeb rau PCB Manufacturing

Cov khoom tseem ceeb rau PCB Manufacturing

Niaj hnub no, muaj ntau lub tuam txhab PCB, tus nqi tsis siab lossis qis, zoo thiab lwm yam teeb meem peb tsis paub dab tsi txog, yuav xaiv li casPCB kev tsim khoomcov ntaub ntawv?Ua cov ntaub ntawv, feem ntau tooj liab clad phaj, zaj duab xis qhuav, number case, thiab lwm yam., cov nram qab no ob peb cov ntaub ntawv rau ib tug luv luv qhia.

1. Copper clad

Hu ua ob-sided tooj liab clad phaj.Txawm hais tias cov ntawv ci tooj liab tuaj yeem ruaj khov rau ntawm lub substrate yog txiav txim siab los ntawm cov ntawv khi, thiab lub zog stripping ntawm tooj liab clad phaj feem ntau yog nyob ntawm kev ua haujlwm ntawm cov ntawv khi.Feem ntau siv tooj liab clad phaj thickness ntawm 1.0 hli, 1.5 hli thiab 2.0 hli peb.

(1) hom tooj liab clad daim hlau.

Muaj ntau ntau txoj kev faib rau tooj liab clad daim hlau.Feem ntau raws li cov khoom siv hlau nplaum sib txawv, tuaj yeem muab faib ua: ntawv puag, iav fiber ntau daim ntaub puag, sib xyaw puag (CEM series), ntau txheej phaj puag thiab cov khoom tshwj xeeb hauv paus (ceramic, hlau core puag, thiab lwm yam) tsib pawg.Raws li qhov sib txawv ntawm cov nplaum nplaum siv los ntawm lub rooj tsavxwm, cov ntawv siv raws li CCL yog: phenolic resin (XPC, XXXPC, FR-L, FR-2, thiab lwm yam), epoxy resin (FE-3), polyester resin thiab lwm yam. .Cov iav fiber ntau hauv CCL muaj epoxy resin (FR-4, FR-5), nws yog tam sim no siv ntau hom iav fiber ntau.Lwm cov khoom tshwj xeeb (nrog iav fiber ntau daim ntaub, nylon, tsis-woven, thiab lwm yam kom nce cov khoom): ob tug txiv neej imide hloov triazine resin (BT), polyimide (PI) resin, diphenylene zoo tagnrho resin (PPO), maleic acid obligation imine - styrene resin (MS), poly (oxygen acid ester resin, polyene embedded nyob rau hauv resin, thiab lwm yam. Raws li cov nplaim retardant cov khoom ntawm CCL, nws tuaj yeem muab faib ua cov nplaim hluav taws kub thiab tsis nplaim hluav taws. Nrog rau kev saib xyuas ntau dua rau kev tiv thaiv ib puag ncig, ib hom tshiab ntawm CCL yam tsis muaj cov ntaub ntawv suab puam tau tsim nyob rau hauv cov nplaim hluav taws kub CCL, uas tuaj yeem hu ua "ntsuab nplaim taws retardant CCL". , los ntawm kev faib tawm ntawm CCL, nws tuaj yeem muab faib ua kev ua haujlwm dav dav CCL, tsis tshua muaj hluav taws xob tas li CCL, siab kub tsis kam CCL, qis thermal expansion coefficient CCL (feem ntau siv rau ntim substrate) thiab lwm yam.

(2)kev ua tau zoo ntsuas ntawm tooj liab clad phaj.

iav hloov kub.Thaum qhov kub nce mus rau ib cheeb tsam, lub substrate yuav hloov ntawm "iav xeev" mus rau "lub xeev roj hmab", qhov kub no yog hu ua iav hloov kub (TG) ntawm phaj.Ntawd yog, TG yog qhov kub siab tshaj plaws (%) uas lub substrate tseem nruj.Uas yog hais tias, cov ntaub ntawv zoo tib yam substrate ntawm qhov kub thiab txias, tsis tsuas yog tsim softening, deformation, melting thiab lwm yam tshwm sim, tab sis kuj qhia ib tug ntse poob ntawm txhua yam thiab hluav taws xob yam ntxwv.

Feem ntau, TG ntawm PCB boards yog siab tshaj 130 ℃, TG ntawm cov laug cam siab tshaj 170 ℃, thiab TG ntawm nruab nrab boards yog siab tshaj 150 ℃.Feem ntau TG tus nqi ntawm 170 luam ntawv board, hu ua lub siab TG luam ntawv board.Lub TG ntawm substrate yog txhim kho, thiab cov cua kub tsis kam, noo noo tsis kam, tshuaj tsis kam, stability thiab lwm yam ntxwv ntawm cov ntawv luam tawm yuav raug txhim kho thiab txhim kho.Qhov siab dua tus nqi TG, qhov zoo dua qhov kub ntawm cov phaj, tshwj xeeb tshaj yog nyob rau hauv cov txheej txheem tsis muaj txhuas,High TG PCByog siv ntau dua.

2. Dielectric tsis tu ncua.

Nrog rau txoj kev loj hlob sai ntawm kev siv tshuab hluav taws xob, kev ceev ntawm kev ua cov ntaub ntawv thiab cov ntaub ntawv xa mus tau zoo dua.Txhawm rau nthuav dav txoj kev sib txuas lus, kev siv zaus hloov mus rau qhov chaw siab zaus, uas yuav tsum muaj cov khoom siv substrate kom muaj qhov tsis tshua muaj dielectric tsis tu ncua E thiab tsis tshua muaj dielectric poob TG.Tsuas yog los ntawm kev txo E tuaj yeem tau txais cov teeb liab kis tau zoo, thiab tsuas yog los ntawm kev txo TG tuaj yeem txo qis kev sib kis.

3. Thermal expansion coefficient.

Nrog rau txoj kev loj hlob ntawm precision thiab multilayer ntawm cov ntawv luam tawm thiab BGA, CSP thiab lwm yam thev naus laus zis, PCB cov chaw tsim khoom tau muab tso rau hauv kev xav tau ntau dua rau kev ruaj ntseg ntawm tooj liab clad phaj loj.Txawm hais tias qhov kev ruaj ntseg ntawm cov tooj liab clad phaj muaj feem xyuam rau cov txheej txheem ntau lawm, nws tsuas yog nyob ntawm peb cov khoom siv raw ntawm tooj liab clad phaj: resin, cov khoom siv ntxiv thiab cov ntawv ci tooj liab.Txoj kev niaj zaus yog hloov kho cov resin, xws li hloov kho epoxy resin;Txo cov ntsiab lus resin piv, tab sis qhov no yuav txo tau cov hluav taws xob rwb thaiv tsev thiab cov khoom siv tshuaj lom neeg ntawm cov substrate;Copper foil muaj me ntsis cuam tshuam rau qhov seem stability ntawm tooj liab clad phaj. 

4.UV thaiv kev ua haujlwm.

Nyob rau hauv cov txheej txheem ntawm Circuit Court board tsim, nrog rau nrov ntawm photosensitive solder, nyob rau hauv thiaj li yuav zam tau ob tug duab ntxoov ntxoo tshwm sim los ntawm kev sib nrig sib cuam tshuam rau ob sab, tag nrho cov substrates yuav tsum muaj lub luag hauj lwm ntawm shielding UV.Muaj ntau txoj hauv kev los thaiv kev sib kis ntawm ULTRAVIOLET lub teeb.Feem ntau, ib lossis ob hom iav fiber ntau daim ntaub thiab epoxy resin tuaj yeem hloov kho, xws li siv epoxy resin nrog UV-thaiv thiab tsis siv neeg kho qhov muag pom muaj nuj nqi.

Huihe Circuits yog lub koom haum PCB kev tshaj lij, txhua txoj kev raug sim nruj heev.Los ntawm lub rooj tsav xwm hauv Circuit Court los ua thawj txheej txheem mus rau qhov kawg txheej txheem kev soj ntsuam zoo, txheej txheej yuav tsum tau kuaj xyuas nruj me ntsis.Kev xaiv ntawm cov laug cam, tus cwj mem siv, cov cuab yeej siv, thiab kev nruj ntawm cov neeg ua haujlwm tuaj yeem cuam tshuam rau qhov kawg ntawm lub rooj tsavxwm.Txij thaum pib mus rau kev soj ntsuam zoo, peb muaj kev saib xyuas kev ua haujlwm kom ntseeg tau tias txhua txoj kev ua tiav ib txwm ua tiav.Koom nrog peb!