Cov xwm txheej cia rau PCBs (Printed Circuit Boards) cuam tshuam ncaj qha rau lawv cov kev ua tau zoo thiab kev ua haujlwm tom qab; Kev khaws cia tsis raug tuaj yeem ua rau muaj teeb meem xws li oxidation, noo noo nqus, thiab deformation. Cov hauv qab no yog cov lus qhia tseem ceeb txog kev khaws cia:
1. Ib puag ncig kub thiab av noo
Kub: Pom zoo ntau yam yog 10-25℃(tsis txhob kub siab lossis qis qis).
High temperatures (>30 degree) tuaj yeem ua kom oxidation lossis cov khoom laus.
Tsawg kub (<0°C) can cause material embrittlement.
Humidity: txheeb ze av noo yuav tsum yog 30-60% RH (kev tiv thaiv noo noo yog qhov tseem ceeb).
Excessive humidity (>60%) yooj yim ua rau kom noo noo nqus, oxidation ntawm cov ntaub qhwv, lossis deformation ntawm cov khoom laminate.
Kev khaws cia yuav tsum tau yooj yim siv cov dej noo- cov khoom pov thawj los yog cov khoom desiccants (xws li silica gel).
2. Kev tiv thaiv -Txoj Kev Ntsuas
Static -Sensitive PCBs:
Khaws rau hauv lub hnab los tiv thaiv- zoo li qub (piv txwv li, cov hnab nyiaj metalized shielding hnab ua raws li MIL-STD-883 tus qauv) lossis cov thawv ntim khoom tiv thaiv zoo li qub.
Tsis txhob sib cuag ncaj qha nrog cov khoom siv hluav taws xob lossis tuav yam tsis muaj av kom raug.
3. Cov txheej txheem ntim khoom
Nqus Sealing: Cov PCBs tsis siv tau raug pom zoo kom ua lub tshuab nqus tsev- kaw nrog cov khoom siv desiccant kaw.
Sib cais qhov chaw: Ntau- txheej PCBs yuav tsum tau sib cais los ntawm ua npuas ncauj lossis los tiv thaiv- daim ntawv zoo li qub los tiv thaiv kev khawb.
Zam Txim ntau dhau: Stacking qhov siab yuav tsum tau khaws cia rau hauv qhov kev txwv tsim nyog (xws li,<1 meter) to prevent deformation.
4. Kev tiv thaiv lub teeb thiab hmoov av
Kev Tiv Thaiv Lub Teeb: Rau lub sijhawm ntev - khaws cia, khaws PCBs kom deb ntawm lub teeb ultraviolet (xws li tshav ntuj ncaj qha) txhawm rau tiv thaiv kev laus ntawm txheej txheej ntawm daim npog ntsej muag.
Plua plav- Ib puag ncig pub dawb: Cov plua plav paug ntawm cov ntaub qhwv tuaj yeem cuam tshuam qhov zoo ntawm cov khoom siv.
