Kodi ndondomeko yeniyeni ya PCBA ndi yotani?

Njira ya PCBA: PCBA=Msonkhano wa Board Circuit Board, ndiye kuti, bolodi yopanda kanthu ya PCB imadutsa kumtunda kwa SMT, kenako imadutsa njira yonse ya DIP plug-in, yotchedwa PCBA.

Njira ndi Technology
Kujowina Jigsaw:
1. V-CUT kugwirizana: pogwiritsa ntchito splitter kuti agawike, njira yogawanitsa iyi imakhala ndi gawo losalala ndipo ilibe zotsatira zoyipa pazotsatira.
2. Gwiritsani ntchito kugwirizana kwa pinhole (bowo la sitampu): Ndikoyenera kuganizira za burr pambuyo pa kusweka, komanso ngati zingakhudze ntchito yokhazikika yazitsulo pa makina a Bonding mu ndondomeko ya COB.Iyeneranso kuganiziridwa ngati idzakhudza pulogalamu ya pulagi komanso ngati idzakhudza msonkhano.

Zinthu za PCB:
1. Ma PCB a makatoni monga XXXP, FR2, ndi FR3 amakhudzidwa kwambiri ndi kutentha.Chifukwa cha ma coefficients osiyanasiyana okulitsa kutentha, ndikosavuta kuyambitsa matuza, mapindikidwe, kuthyoka, ndi kukhetsa kwa khungu lamkuwa pa PCB.
2. Ma PCB a glass fiber board monga G10, G11, FR4, ndi FR5 sakhudzidwa kwambiri ndi kutentha kwa SMT ndi kutentha kwa COB ndi THT.
Ngati oposa COB awiri.Zithunzi za SMT.Njira zopangira THT zimafunikira pa PCB imodzi, kutengera mtundu ndi mtengo wake, FR4 ndiyoyenera pazinthu zambiri.

Chikoka cha mawaya a chingwe cholumikizira pad ndi malo abowo pakupanga kwa SMT:

Mawaya a mizere yolumikizira pad ndi malo odutsa mabowo amakhudza kwambiri zokolola za SMT, chifukwa mizere yolumikizana ndi pad yosayenera komanso mabowo amatha kukhala ndi gawo la "kuba" solder, kuyamwa solder yamadzi mu ng'anjo ya reflow Go. siphon ndi capillary zochita mu madzimadzi).Zinthu zotsatirazi ndi zabwino kupanga mtundu:
1. Chepetsani kukula kwa mzere wolumikizira pad:
Ngati palibe malire a kunyamula panopa ndi PCB kukula kukula, pazipita m'lifupi padi kugwirizana mzere ndi 0.4mm kapena 1/2 pad m'lifupi, amene angakhale ang'onoang'ono.
2. Ndikwabwino kugwiritsa ntchito mizere yopapatiza yolumikizana ndi utali wosachepera 0.5mm (m'lifupi osaposa 0.4mm kapena m'lifupi osaposa 1/2 ya m'lifupi mwake) pakati pa mapepala olumikizidwa ndi zingwe zazikulu zowongolera ( monga ndege zapansi, ndege zamagetsi).
3. Pewani kulumikiza mawaya kuchokera kumbali kapena ngodya mu pad.Makamaka, waya wolumikizira amalowa pakati pa kumbuyo kwa pad.
4. Kupyolera mu mabowo ayenera kupeŵedwa momwe angathere mu mapepala a zigawo za SMT kapena moyandikana ndi mapepala.

Chifukwa chake ndi: kupyolera mu dzenje la pad kudzakopa solder mu dzenje ndikupangitsa solder kusiya olowa;dzenje lomwe lili pafupi ndi pad, ngakhale pali chitetezo chabwino chamafuta obiriwira (pakupanga kwenikweni, kusindikiza kwamafuta obiriwira muzinthu zomwe zikubwera za PCB sizolondola Nthawi zambiri), kungayambitsenso kutentha, komwe kungasinthe kulowetsedwa liwiro la olowa m`malo olumikizirana mafupa, chifukwa tombstoneing chodabwitsa mu zigawo chip, ndi kulepheretsa yachibadwa mapangidwe solder olowa mu milandu kwambiri.
Kulumikizana pakati pa dzenje ndi pad ndikwabwino kwambiri chingwe cholumikizira chocheperako chokhala ndi utali wosachepera 0.5mm (m'lifupi osapitilira 0.4mm kapena m'lifupi osapitilira 1/2 ya m'lifupi mwake).