Koj paub ntau npaum li cas txog qhov kev paub ntawm qhov chaw plating ntawm FPC hloov tau yooj yim circuit boards

Electroplating yog txheej txheem uas cov hlau los yog alloy tso rau ntawm qhov chaw ntawm lub workpiece los ntawm kev siv lub hauv paus ntsiab lus ntawm electrolysis los tsim ib txheej txheej, ntom thiab zoo-bonded hlau txheej. Thaum lub sij hawm electroplating, cov hlau plated yog siv los ua cov anode, uas yog oxidized rau hauv cations thiab nkag mus rau hauv cov tshuaj electroplating; cov khoom hlau yuav tsum tau plated yog siv los ua cov cathode, thiab cov cations ntawm cov hlau plated raug txo rau ntawm cov hlau nto los ua ib txheej plated.

Txhawm rau tshem tawm qhov cuam tshuam ntawm lwm cov cations thiab ua kom cov txheej txheej tsis sib xws thiab ruaj khov, cov tshuaj uas muaj hlau cations hauv txheej yuav tsum tau siv los ua cov tshuaj electroplating kom cov concentration ntawm cov hlau cations hauv txheej tsis hloov. Lub hom phiaj ntawm electroplating yog txheej txheej hlau ntawm lub substrate los hloov cov khoom nto lossis qhov ntev ntawm cov substrate. Electroplating tuaj yeem txhim kho corrosion kuj ntawm cov hlau (cov hlau plated feem ntau yog cov hlau tsis muaj zog), ua kom tawv tawv, tiv thaiv kev hnav, txhim kho hluav taws xob conductivity, lubrication, tshav kub tsis kam, thiab kev zoo nkauj saum npoo.

Kab lus no feem ntau tham txog qee qhov kev paub txog FPC nto electroplating.

1. Pretreatment ntawm FPC electroplating

Qhov saum npoo ntawm tus neeg xyuas pib raug nthuav tawm los ntawm FPC txheej txheej txheej txheem ntawm lub rooj tsavxwm hloov tau yooj yim tuaj yeem muaj cov nplaum nplaum los yog number case, nrog rau oxidation thiab discoloration los ntawm cov txheej txheem kub. Txhawm rau kom tau txais cov txheej txheem nruj nrog cov adhesion zoo, tus neeg xyuas pib yuav tsum muaj cov kab mob sib kis thiab cov oxide txheej raug tshem tawm, tawm hauv cov neeg xyuas pib kom huv si. Txawm li cas los xij, qee qhov ntawm cov kab mob no tau sib xyaw ua ke nrog tooj liab thiab tsis tuaj yeem raug tshem tawm tag nrho nrog cov tshuaj ntxuav. Yog li ntawd, feem ntau ntawm lawv yog feem ntau kho nrog alkaline abrasives nrog ib tug tej yam lub zog thiab polishing txhuam. Feem ntau ntawm cov nplaum nplaum yog epoxy resins. hom, nws cov alkali tsis kam yog cov tsis zoo, uas yuav ua rau txo qis hauv kev sib raug zoo zog. Txawm hais tias nws yuav tsis pom meej meej, nyob rau hauv cov txheej txheem FPC electroplating, cov txheej txheem plating tuaj yeem nkag mus los ntawm ntug ntawm txheej txheej, thiab hauv qhov xwm txheej hnyav, txheej txheej yuav raug tev tawm. Qhov tshwm sim ntawm solder drilling nyob rau hauv lub overlay tshwm sim thaum kawg soldering. Nws tuaj yeem hais tau tias cov txheej txheem ntxuav ua ntej yuav muaj kev cuam tshuam loj rau cov yam ntxwv ntawm cov ntawv luam tawm yooj yim FPC, thiab kev saib xyuas tag nrho yuav tsum tau them rau cov txheej txheem ua haujlwm.

2. Thickness ntawm FPC electroplating

Thaum lub sij hawm electroplating, tus nqi deposition ntawm cov hlau electroplated yog ncaj qha ntsig txog lub zog hluav taws xob, thiab lub zog hluav taws xob sib txawv nrog cov duab ntawm cov qauv Circuit Court thiab kev sib raug zoo ntawm cov electrodes. Feem ntau, qhov nyias nyias ntawm txoj kab dav ntawm cov hlau, qhov ntse dua lub davhlau ya nyob twg ntawm lub davhlau ya nyob twg, thiab qhov kev ncua deb ntawm electrode. Qhov ze ntawm lub zog hluav taws xob yog, qhov tuab ntawm txheej yuav yog. Hauv cov ntawv thov cuam tshuam nrog cov ntawv luam tawm yooj yim, muaj ntau qhov xwm txheej uas qhov dav ntawm ntau cov xov hlau nyob hauv tib lub voj voog sib txawv heev, uas ua rau nws yooj yim dua los tsim cov thickness tsis sib xws. Txhawm rau tiv thaiv qhov no los ntawm qhov tshwm sim, tus qauv shunt cathode tuaj yeem txuas nrog ib ncig ntawm lub voj voog. , nqus cov tsis sib xws tam sim no faib rau ntawm cov qauv electroplating, thiab xyuas kom meej tias lub thickness ntawm txheej ntawm txhua qhov chaw yog sib xws rau qhov loj tshaj plaws. Yog li ntawd, kev siv zog yuav tsum tau ua nyob rau hauv cov qauv ntawm cov electrodes. Ib qho kev daws teeb meem sib haum xeeb tau thov ntawm no. Cov qauv rau cov khoom uas muaj kev xav tau siab ntawm qhov sib xws ntawm cov txheej txheej yog nruj, thiab cov qauv rau lwm qhov chaw muaj kev sib haum xeeb, xws li cov hlau lead-tin plating rau fusion vuam, kub-plating rau hlau hlau ncej (welding), thiab lwm yam. . Siab, thiab dav dav los tiv thaiv corrosion lead-tin plating, plating thickness yuav tsum tau so.

3. Smudges thiab av ntawm FPC electroplating

Tsis muaj teeb meem nrog lub xeev ntawm cov txheej txheem uas nyuam qhuav tau plated, tshwj xeeb tshaj yog cov tsos, tab sis qee qhov chaw yuav tshwm sim stains, av, discoloration thiab lwm yam tshwm sim sai sai tom qab, tshwj xeeb tshaj yog tsis muaj qhov txawv txav thaum lub Hoobkas tshuaj xyuas, tab sis thaum tus neeg siv. tau txais kev tshuaj xyuas, pom tias muaj teeb meem tshuaj pleev ib ce. Qhov no yog tshwm sim los ntawm tsis txaus drifting thiab residual plating tov nyob rau saum npoo ntawm lub plating txheej, uas maj mam undergoes tshuaj tiv thaiv nyob rau hauv ib lub sij hawm ntawm lub sij hawm. Tshwj xeeb tshaj yog lub rooj tsav xwm hloov tau yooj yim, vim tias nws yog mos thiab tsis tiaj tus, nws yooj yim rau ntau yam kev daws teeb meem rau hauv qhov chaw so? Tom qab ntawd nws yuav hnov ​​​​mob hauv ntu no thiab hloov xim. Txhawm rau tiv thaiv qhov no los ntawm qhov tshwm sim, nws yog ib qho tsim nyog tsis yog tsuas yog ua kom ntab puv nkaus xwb, tab sis kuj yuav tsum nqa tawm kom qhuav. Seb puas los yog tsis yog qhov drift txaus tuaj yeem lees paub los ntawm qhov ntsuas kub ntawm thermal aging test.

Plaub, FPC kub cua leveling

Cov cua kub theem yog ib qho cuab yeej tsim los rau cov txheej txheem ntawm cov hlau lead thiab tin ntawm cov ntawv luam tawm nruj (PCBs). Cua kub leveling yog ncaj qha mus rau hauv lub rooj tsavxwm nyob rau hauv lub molten lead thiab tin da dej vertically, thiab cov tshaj solder yog tshuab nrog cua kub.

Qhov xwm txheej no hnyav heev rau cov ntawv luam tawm yooj yim FPC. Yog tias cov ntawv luam tawm yooj yim FPC tsis tuaj yeem muab tso rau hauv cov khoom siv yam tsis muaj kev ntsuas, cov ntawv luam tawm yooj yim FPC yuav tsum tau muab sib xyaw ntawm cov tshuaj pleev ib ce ua los ntawm cov hlau titanium, thiab tom qab ntawd muab tso rau hauv cov molten solder. Tau kawg, qhov chaw ntawm cov ntawv luam tawm yooj yim FPC yuav tsum tau ntxuav thiab ua ntej. Vim yog qhov hnyav ntawm cov txheej txheem huab cua kub, nws yog ib qho yooj yim rau lub solder laum los ntawm qhov kawg ntawm lub npog txheej mus rau hauv qab ntawm lub npog txheej, tshwj xeeb tshaj yog thaum lub zog sib txuas ntawm lub hau txheej thiab qhov chaw ntawm cov tooj liab. ntawv ci yog tsawg, qhov tshwm sim no feem ntau tshwm sim ntau zaus. Txij li cov zaj duab xis polyimide yog ib qho yooj yim los nqus dej noo, thaum siv cov cua kub theem txheej txheem, cov dej noo absorbed los ntawm cov dej noo yuav ua rau lub hau npog ua npuas ncauj lossis txawm tias tev tawm vim yog thermal evaporation sai. Yog li ntawd, ua ntej FPC cua kub leveling, nws yuav tsum tau qhuav thiab noo-pov thawj. tswj.

Tsib, FPC tshuaj plating

Thaum cov kab hluav taws xob yuav tsum tau plated raug rho tawm thiab tsis tuaj yeem siv los ua electrode, tsuas yog electroless plating tuaj yeem ua tau. Feem ntau, cov txheej txheem plating siv hauv electroless kub plating muaj cov tshuaj muaj zog, thiab cov txheej txheem electroless kub plating yog ib qho piv txwv. Cov tshuaj kub plating tshuaj yog cov tshuaj alkaline aqueous nrog tus nqi pH siab heev, yog li yog tias FPC hloov tau yooj yim muaj txheej txheem kub plating, kub-resistant solder tiv thaiv insulating number case yuav tsum tau tshuaj ntsuam luam ntawv. Thaum siv cov txheej txheem electroplating no, nws yooj yim rau cov txheej txheem plating kom nkag mus rau hauv qab txheej txheej, tshwj xeeb tshaj yog tias kev tswj xyuas zoo ntawm cov txheej txheem npog zaj duab xis lamination tsis nruj thiab daim ntawv cog lus muaj zog tsawg, qhov teeb meem no yuav tshwm sim.

Vim yog cov yam ntxwv ntawm cov tshuaj plating, electroless plating ntawm cov tshuaj tiv thaiv kev hloov pauv ntau dua rau qhov tshwm sim uas cov tshuaj plating nkag mus rau hauv txheej txheej. Nws yog qhov nyuaj kom tau txais cov txheej txheem plating zoo los ntawm cov txheej txheem no.