Kodi Solder Balls ndi chiyani?

Ngati mipira ya solder ikuwoneka, imatha kukhudza magwiridwe antchito onse a derabolodi.Mipira yaing'ono yogulitsira imakhala yosawoneka bwino ndipo imatha kusuntha zinthu zina pang'ono.Pazovuta kwambiri, mipira yayikulu yogulitsira imatha kugwa pamwamba ndikuchotsa mtundu wamaguluwo.Choipa kwambiri, mipira ina imatha kugudubuzapazigawo zina za bolodi, zomwe zimatsogolera ku akabudula ndi kuyaka.

Zifukwa zingapo zomwe mipira ya solder imachitika ndi izi:

Echinyezi chochulukirapo m'malo omanga
Chinyezi kapena chinyezi pa PCB
Kuthamanga kwambiri mu solder phala
Kutentha kapena kupanikizika kumakwera kwambiri panthawi yobwezeretsanso
Kupukuta kosakwanira ndi kuyeretsa pambuyo pobwezeretsanso
Phala la solder silinakonzekere bwino
Njira Zopewera Mipira ya Solder
Ndi zomwe zimayambitsa mipira ya solder mu malingaliro, mungagwiritse ntchito njira zosiyanasiyana ndi miyeso panthawi yopanga kuti muteteze.Njira zina zothandiza ndi:

1. Chepetsani chinyezi cha PCB
Zinthu zoyambira za PCB zimatha kusunga chinyezi mukangopanga kupanga.Ngati bolodi liri lonyowa mukayamba kugwiritsa ntchito solder, mipira ya solder idzachitika.Poonetsetsa kuti bolodi ilibe chinyezi ngatizotheka, wopanga akhoza kuwalepheretsa kuchitika.

Sungani ma PCB onse pamalo owuma, opanda chinyezi chapafupi.Asanapange, yang'anani pa bolodi lililonse kuti muwone ngati pali chinyontho, ndipo yanikani ndi nsalu zothirira madzi.Kumbukirani kuti chinyontho chikhoza kumangirizidwa mu mapepala a solder.Kuphika matabwa pa madigiri 120 Celsius kwa maola anayi nthawi iliyonse yopanga isanasanduke chinyezi chochulukirapo.

2. Sankhani Zoyenera Zogulitsa Zogulitsa
Zinthu zomwe zimagwiritsidwa ntchito popanga solder zimatha kupanganso mipira ya solder.zitsulo zapamwamba komanso kutsika kwa okosijeni mkati mwa phala kumachepetsa mwayi woti mipira ipangidwe, chifukwa kukhuthala kwa solder kumalepheretsa.kuti isagwe pamene yatenthedwa.

Mutha kugwiritsa ntchito flux kuti muteteze makutidwe ndi okosijeni ndikuchepetsa kuyeretsedwa kwa matabwa mutatha kugulitsa, koma kuchulukira kungayambitse kugwa kwadongosolo.Sankhani phala la solder lomwe limakwaniritsa zofunikira kuti bolodi lipangidwe, ndipo mwayi wopanga mipira ya solder udzatsika kwambiri.

3. Yatsani kutentha kwa PCB
Pamene dongosolo la reflow likuyamba, kutentha kwakukulu kungayambitse kusungunuka msanga ndi kutuluka kwa nthunziya solder m'njira yoti ipangitse kuwira ndi mpira.Izi zimachitika chifukwa cha kusiyana kwakukulu pakati pa zinthu za board ndi uvuni.

Pofuna kupewa izi, tenthetsani matabwa kuti akhale pafupi ndi kutentha kwa uvuni.Izi zimachepetsa kuchuluka kwa kusintha kukayamba kutentha mkati, kulola kuti solder isungunuke mofanana popanda kutenthedwa.

4. Musaphonye Maski a Solder
Masks a solder ndi gawo laling'ono la polima lomwe limagwiritsidwa ntchito pamayendedwe amkuwa, ndipo mipira yogulitsira imatha kupanga popanda iwo.Onetsetsani kuti mumagwiritsa ntchito bwino phala la solder kuti mupewe mipata pakati pa zotsalira ndi mapepala, ndipo onetsetsani kuti chigoba cha solder chilipo.

Mutha kukonza izi pogwiritsa ntchito zida zapamwamba komanso kuchepetsa kuchuluka komwe matabwa amatenthedwa.Kutentha kwapang'onopang'ono kumapangitsa kuti solder ifalikire mofanana popanda kusiya mipata kuti mipira ipangidwe.

5. Chepetsani kupsinjika kwa PCB
Kupsyinjika komwe kumayikidwa pa bolodi ikakwera kungathe kutambasula kapena kusokoneza mayendedwe ndi mapepala.Kupanikizika kwambiri kwamkati ndi mapepala adzakankhidwa kutsekedwa;kupsinjika kwambiri kwakunja ndipo adzakokedwa.

Zikakhala zotseguka kwambiri, solder idzakankhidwira kunja, ndipo sipadzakhala okwanira pamene iwo atsekedwa.Onetsetsani kuti bolodi silinatambasulidwe kapena kuphwanyidwa musanapange, ndipo kuchuluka kolakwika kwa solder sikungapitirire.

6. Yang'anani Pawiri Pad Spacing
Ngati mapepala pa bolodi ali m'malo olakwika kapena pafupi kwambiri kapena motalikirana, izi zingayambitse kusanja kwa solder molakwika.Ngati mipira ya solder imapanga pamene mapepala aikidwa molakwika, izi zimawonjezera mwayi woti zidzagwa ndi kuyambitsa zazifupi.

Onetsetsani kuti mapulani onse ali ndi mapepala omwe ali pamalo abwino kwambiri komanso kuti bolodi lililonse lasindikizidwa molondola.Malingana ngati akulowa bwino, pasakhale zovuta kuti atuluke.

7. Yang'anirani Kuyeretsa Stencil
Pambuyo pa chiphaso chilichonse, muyenera kuyeretsa bwino phala la solder kapena kutulutsa stencil.Ngati simusunga zochulukirapo, zidzaperekedwa kumagulu amtsogolo panthawi yopanga.Zowonjezereka izi zidzamanga pamwamba kapena mapepala osefukira ndikupanga mipira.

Ndi bwino kuyeretsa mafuta ochulukirapo ndi solder kuchokera ku stencil pambuyo pa kuzungulira kulikonse kuti muteteze ma buildups.Zedi, zitha kutenga nthawi, koma ndikwabwino kuyimitsa nkhaniyi isanakule.

Mipira ya solder ndiye vuto la mzere uliwonse wopanga msonkhano wa EMS.Mavuto awo ndi osavuta, koma zoyambitsa zake ndi zochuluka kwambiri.Mwamwayi, gawo lililonse la kupanga limapereka njira yatsopano yopewera kuti zisachitike.

Yang'anani ndondomeko yanu yopanga ndikuwona komwe mungagwiritse ntchito njira zomwe zili pamwambazi kuti mupewekupanga mipira yogulitsira popanga SMT.