Kev tswj cov txheej txheem ntawm tooj liab tog yuav cuam tshuam rau qee qhov tshwj xeeb boards, xws li high-frequency circuit boards, soft hard bonding boards, thick copper boards, impedance boards, hole plates, thick gold boards, and coil boards. Ntawm chav kawm, nws muaj feem xyuam rau cov teeb meem zoo ntawm Circuit Court board manufacturers, yog li txhua tus txheej txheem yog nruj me ntsis tswj.
Decomposition ntawm tooj liab los nag txheej txheem: alkaline degreasing → thib ob los yog thib peb theem countercurrent rinsing → roughening (micro etching) → thib ob theem countercurrent rinsing → pre leaching → activation → thib ob theem countercurrent rinsing → degumming → thib ob theem countercurrent rinsing theem → yaug → acid leaching
Lub hom phiaj tseem ceeb ntawm tooj liab deposition yog mus txuas circuits. Cov txheej txheem tshuaj yog siv rau cov tshuaj tooj liab rau ntawm lub substrate ntawm cov phab ntsa uas tsis yog-conductive borehole. Raws li tseem muaj electroplated tooj liab, tooj liab deposition yog siv los ua lub substrate rau tom ntej electroplated tooj liab. Cov txheej txheem tsim khoom ntawm txhua lub rooj tsav xwm PCB hauv Uniwell circuits yog ua tib zoo ua, thiab txhua kauj ruam ua tib zoo ua.
1. Alkaline degreasing
Alkaline degreasing yog hais txog kev tshem tawm cov roj stains, ntiv tes, oxides, thiab plua plav hauv cov qhov ntawm lub rooj tsavxwm; Hloov cov nqi tsis zoo rau ntawm phab ntsa pore mus rau hauv qhov txiaj ntsig zoo pab txhawb cov adsorption ntawm colloidal palladium hauv cov txheej txheem tom ntej; Feem ntau, kev tshem tawm cov roj thiab ntxuav yuav tsum tau ua raws li cov cai, thiab kev kuaj xyuas yuav tsum tau ua los ntawm kev siv cov tooj liab deposition backlight test.
2. Micro erosion
Micro etching yog hais txog kev tshem tawm cov oxides ntawm qhov chaw ntawm lub rooj tsavxwm, thickening ntawm lub rooj tsavxwm nto, thiab ua kom muaj kev sib raug zoo ntawm cov txheej txheem tooj liab thiab cov substrate tooj liab; Cov tooj liab tsim tshiab muaj qhov yooj yooj yim thiab tuaj yeem ua tau zoo adsorb colloidal palladium.
3. Ua ntej impregnation
Pre impregnation feem ntau yog siv los tiv thaiv lub tank palladium los ntawm kev sib kis, raws li cov kua tank yav dhau los yuav paug lub palladium tank. Tom qab ua ntej impregnation, lub neej kev pab cuam ntawm lub tank palladium tuaj yeem txuas ntxiv kom ntseeg tau qhov zoo ntawm PCB pawg thawj coj saib.
Tom qab alkaline degreasing, lub phab ntsa pore zoo tuaj yeem nqus cov colloidal palladium hais nrog cov nqi tsis zoo, txhawm rau kom ntseeg tau tias qhov txuas ntxiv, sib xws, thiab qhov ceev ntawm cov tooj liab tom ntej; Yog li alkaline roj tshem tawm thiab ua kom muaj zog yog qhov tseem ceeb heev rau qhov zoo ntawm cov tooj liab tom ntej.
4. Gel tso tawm
Lub hom phiaj ntawm degumming yog tshem tawm cov tin ions qhwv ib ncig ntawm cov colloidal palladium hais, nthuav tawm cov palladium core hauv cov khoom colloidal. Qhov no tuaj yeem ua rau qhov pib ntawm cov tshuaj tiv thaiv tooj liab deposition. Kev paub tau pom tias siv fluoroboric acid ua tus neeg sawv cev degumming yog qhov kev xaiv zoo.
5. tooj liab tog
Tom qab cov txheej txheem saum toj no, cov kauj ruam kawg ntawm chemical tooj liab deposition tuaj yeem ua tiav. Los ntawm cov tshuaj tiv thaiv, cov txheej txheem tooj liab deposition tseem ceeb heev thiab yuav cuam tshuam rau cov khoom zoo. Thaum muaj teeb meem tshwm sim, lawv yuav ua rau muaj teeb meem batch, thiab txawm tias kev sim tsis tuaj yeem ua tiav kom tshem tawm lawv. Thaum kawg, PCB qauv ua cov khoom ua rau muaj kev phom sij zoo thiab tuaj yeem tsuas yog muab pov tseg hauv cov khoom siv. Yog li ntawd, raws li cov kev paub ntawm Circuit Board manufacturers, tooj liab deposition yuav tsum nruj me ntsis ua raws li cov tsis nyob rau hauv lub lag luam phau ntawv, thiab txhua kauj ruam ua hauj lwm yuav tsum nruj me ntsis tswj.