Cov Circuit Court Board yuav qhia cov tinning tsis zoo thaum SMT ntau lawm. Feem ntau, cov tinning tsis muaj feem cuam tshuam nrog kev nyiam huv ntawm cov liab pcb nto. Yog tias tsis muaj av, yuav tsis muaj tinning. Thib ob, Tinning thaum flux nws tus kheej yog qhov tsis zoo, qhov kub thiab lwm yam. Yog li dab tsi yog qhov tseem ceeb ntawm cov hluav taws xob tin discoms hauv Circuit Court Board ntau lawm thiab ua? Yuav daws cov teeb meem no li cas tom qab nthuav tawm nws?
1. Lub tin saum npoo av lossis ntu yog oxidized thiab tooj liab nto yog npub.
2. Muaj flakes nyob rau saum npoo ntawm cov Circuit Board tsis muaj tin, thiab txheej txheej plating ntawm lub rooj tsavxwm muaj qhov cuam tshuam tsis zoo.
3. Lub siab-muaj txheej txheej yog ntxhib, muaj qhov tshwm sim hlawv, thiab muaj flakes nyob rau saum npoo ntawm lub rooj tswj hwm tsis muaj tin.
4. Cov nplaim ntawm Circuit Court Board tau txuas nrog roj, impurities thiab lwm yam sundries, lossis muaj cov roj silicone.
5. Muaj qhov pom tseeb ci ntsa rau ntawm cov npoo ntawm cov qhov muaj peev xwm tsawg, thiab cov txheej txheem siab yog ntxhib yog ntxhib thiab hlawv.
6. Cov txheej ntawm ib sab ua tiav, thiab cov txheej ntawm sab tod yog neeg pluag, thiab muaj qhov pom tseeb ci ntsa iab ntawm ntug ntawm lub qhov muaj peev xwm qis.
7. Tus PCB pawg thawj tswj hwm tsis tuaj yeem lav tau qhov ntsuas kub lossis lub sijhawm thaum lub sijhawm ua kom cov txheej txheem soldering, lossis flux tsis yog siv.
8. Muaj cov ntsiab lus impurities nyob rau hauv lub plating nyob rau saum npoo ntawm cov chaw board, lossis sib tsoo xau yog sab laug rau saum npoo ntawm cov txheej txheem ntau lawm ntawm substrate.
9. Ib thaj chaw loj ntawm cov peev xwm tsawg tsis tuaj yeem plated nrog tin, thiab saum npoo ntawm cov chaw tsaus nti liab lossis xim liab ntawm ib sab thiab ib qho tsis zoo ntawm lwm yam.