Kupopera mbewu mankhwalawa malata ndi sitepe ndi ndondomeko mu PCB proofing process. TheChithunzi cha PCBimamizidwa mu dziwe losungunuka la solder, kotero kuti zonse zowonekera zamkuwa zidzakutidwa ndi solder, ndiyeno solder yowonjezera pa bolodi imachotsedwa ndi chodulira mpweya wotentha. chotsani. Mphamvu ya soldering ndi kudalirika kwa bolodi la dera pambuyo popopera tini ndi bwino. Komabe, chifukwa cha makhalidwe ake ndondomeko, pamwamba flatness mankhwala malata kutsitsi si zabwino, makamaka pazigawo zing'onozing'ono zamagetsi monga phukusi BGA, chifukwa cha dera laling'ono kuwotcherera, ngati flatness si zabwino, zingayambitse mavuto monga zozungulira zazifupi.

ubwino:

1. Kunyowa kwa zigawozi panthawi ya soldering ndi bwino, ndipo kutsekemera kumakhala kosavuta.

2. Ikhoza kuteteza pamwamba pa mkuwa kuti zisawonongeke kapena kuti zikhale ndi okosijeni.

zoperewera:

Sikoyenera kulumikiza zikhomo zokhala ndi mipata yabwino ndi zigawo zazing'ono kwambiri, chifukwa kutsetsereka kwapamwamba kwa bolodi lopopera ndi tin ndi kosauka. Ndiosavuta kupanga mikanda ya malata pakutsimikizira kwa PCB, ndipo ndikosavuta kuyambitsa gawo lalifupi lazigawo zokhala ndi zikhomo zabwino. Mukagwiritsidwa ntchito munjira ya SMT yokhala ndi mbali ziwiri, chifukwa mbali yachiwiri yadutsa kutentha kwambiri kwa reflow soldering, ndikosavuta kusungunulanso utsi wa malata ndikupanga mikanda ya malata kapena madontho amadzi ofanana omwe amakhudzidwa ndi mphamvu yokoka m'malo ozungulira a malata. kutsika, kupangitsa kuti pamwamba pakhale posawoneka bwino. Kuwotcherera kumakhudzanso zovuta zowotcherera.

Pakali pano, ena PCB proofing ntchito njira OSP ndi kumiza golide ndondomeko m'malo malata kupopera mbewu mankhwalawa; Kutukuka kwaukadaulo kwapangitsanso mafakitale ena kutengera malata omiza ndi ndondomeko ya siliva yomiza, kuphatikizidwa ndi chizolowezi chopanda lead m'zaka zaposachedwa, kugwiritsa ntchito kupopera mbewu kwa malata kwakhala malire.