1. 0.5mm phula la QFP pad kutalika ndi lalitali kwambiri, kuchititsa dera lalifupi.
2. PLCC socket pads ndi lalifupi kwambiri, zomwe zimapangitsa kuti pakhale soldering zabodza.
3. Pad kutalika kwa IC ndi yayitali kwambiri ndipo kuchuluka kwa phala la solder ndi lalikulu kumapangitsa kuti pakhale njira yayifupi pakubwereranso.
4. Mapiko a chip mapiko ndiatali kwambiri omwe amakhudza kudzaza chidendene ndi kunyowetsa chidendene.
5. Kutalika kwa pad kwa zigawo za chip ndi zazifupi kwambiri, zomwe zimapangitsa kuti pakhale zovuta zogulitsa monga kusuntha, kutseguka, komanso kulephera kugulitsa.
6. Kutalika kwambiri kwa mapepala a chigawo cha chip kumayambitsa mavuto a soldering monga chipilala choyima, mawonekedwe otseguka, ndi malata ochepa muzitsulo zogulitsira.
7. Kutalika kwa pad ndikotambasula kwambiri zomwe zimapangitsa kuti pakhale zolakwika monga kusamuka kwa gawo, solder yopanda kanthu komanso malata osakwanira pa pad.
8. Kutalika kwa pad ndikotambasula kwambiri ndipo kukula kwake sikufanana ndi pad.
9. Solder pad m'lifupi ndi yopapatiza, zimakhudza kukula kwa solder sungunuka pamodzi chigawo solder mapeto ndi ziyangoyango PCB pa osakaniza zitsulo pamwamba kunyowetsa kufalikira akhoza kufika, zimakhudza mawonekedwe a olowa solder, kuchepetsa kudalirika kwa olowa solder. .
10.Ma solder pads amalumikizidwa mwachindunji ndi madera akuluakulu a zojambula zamkuwa, zomwe zimapangitsa kuti pakhale zolakwika monga zipilala zoyimirira ndi kugulitsa zabodza.
11. Solder pad phula ndi lalikulu kwambiri kapena laling'ono kwambiri, chigawo solder mapeto sangakhoze zigwirizane ndi pad zikuphatikizana, zomwe zimatulutsa zilema monga kuyimirira chipilala, kusamuka, ndi soldering zabodza.
12. Mipata ya solder pad ndi yayikulu kwambiri zomwe zimapangitsa kulephera kupanga ma solder joints.
Nthawi yotumiza: Jan-14-2022