OSP process of PCB pawg thawj coj saib

1. Ntxiv rau cov roj

Cov nyhuv ntawm kev tshem tawm cov roj ncaj qha cuam tshuam rau zaj duab xis tsim ua tau zoo. Cov roj tshem tawm tsis zoo, cov yeeb yaj kiab thickness tsis sib xws. Ntawm qhov tod tes, qhov concentration tuaj yeem tswj tau nyob rau hauv cov txheej txheem ntau los ntawm kev tshuaj xyuas cov tshuaj. Ntawm qhov tod tes, tseem yuav tsum tau txheeb xyuas ntau zaus seb cov txiaj ntsig ntawm kev tshem tawm cov roj yog qhov zoo, yog tias cov txiaj ntsig ntawm kev tshem tawm cov roj tsis zoo, nws yuav tsum tau hloov pauv nyob rau lub sijhawm ntxiv rau cov roj.

2. Micro yaig

Lub hom phiaj ntawm microetching yog tsim kom muaj qhov ntxhib tooj liab kom yooj yim tsim zaj duab xis. Lub thickness ntawm micro-etching ncaj qha cuam tshuam rau cov zaj duab xis tsim tus nqi, yog li nws yog ib qho tseem ceeb heev uas yuav tsum tau ua kom ruaj khov ntawm micro-etching thickness los ua ib tug ruaj khov zaj duab xis thickness. Feem ntau, nws tsim nyog los tswj cov microetching thickness ntawm 1.0-1.5um. Ua ntej txhua qhov kev hloov pauv, tus nqi micro-erosion tuaj yeem ntsuas tau, thiab lub sijhawm micro-erosion tuaj yeem txiav txim siab raws li tus nqi micro-erosion.

3. Ua yeeb yaj kiab

DI dej yuav tsum tau siv rau kev ntxuav ua ntej tsim cov yeeb yaj kiab kom tsis txhob muaj kab mob ntawm cov yeeb yaj kiab ua kua. DI dej kuj tseem yuav tsum tau siv rau kev ntxuav tom qab tsim cov yeeb yaj kiab, thiab PH tus nqi yuav tsum tau tswj ntawm 4.0 thiab 7.0 kom tsis txhob muaj cov yeeb yaj kiab tsis zoo thiab puas. Tus yuam sij ntawm OSP txheej txheem yog tswj cov tuab ntawm cov yeeb yaj kiab los tiv thaiv oxidation. Cov yeeb yaj kiab yog nyias dhau thiab muaj peev xwm cuam tshuam thermal tsis zoo. Hauv kev xa rov qab rov qab, zaj duab xis tsis tuaj yeem tiv taus qhov kub siab (190-200 ° C), uas thaum kawg cuam tshuam rau kev ua haujlwm vuam. Hauv cov kab sib txuas hauv hluav taws xob, cov yeeb yaj kiab tsis tuaj yeem yaj tau zoo los ntawm flux, uas cuam tshuam rau kev ua haujlwm vuam. Kev tswj hwm zaj duab xis tuab yog qhov tsim nyog ntawm 0.2-0.5um.