SMT Short Circuit Zoyambitsa ndi Mayankho

Sankhani ndi kuika makinandi zida zina za SMT pakupanga ndi kukonza zidzawoneka zinthu zambiri zoyipa, monga chipilala, mlatho, kuwotcherera pafupifupi, kuwotcherera zabodza, mpira wamphesa, mkanda wa malata ndi zina zotero.SMT SMT pokonza dera lalifupi ndilofala kwambiri pakulekanitsa bwino pakati pa mapini a IC, omwe amapezeka kwambiri mu 0.5mm ndi pansi pa malo pakati pa mapini a IC, chifukwa cha malo ake ang'onoang'ono, mapangidwe olakwika a template kapena kusindikiza ndikosavuta kutulutsa pang'ono.

Zoyambitsa ndi zothetsera:

Chifukwa 1:Stencil template

Yankho:

Khoma la dzenje la ma mesh achitsulo ndi losalala, ndipo chithandizo cha electropolishing chimafunika popanga.Kutsegula kwa mauna kuyenera kukhala 0.01mm kapena 0.02mm m'lifupi kuposa kutsegula kwa mauna.Kutsegulako kumakhala kopindika, komwe kumathandizira kutulutsa bwino kwa phala la malata pansi pa malata, ndipo kumatha kuchepetsa nthawi yoyeretsa ya mbale ya mauna.

Chifukwa 2: solder phala

Yankho:

0.5mm ndi pansi pa phula la IC solder phala ayenera kusankhidwa mu kukula kwa 20 ~ 45um, mamasukidwe akayendedwe mu 800 ~ 1200pa.S

Chifukwa 3: Chosindikiza cha solder pastekusindikiza

Yankho:

1. Mtundu wa scraper: scraper ili ndi mitundu iwiri ya pulasitiki yowonongeka ndi zitsulo zachitsulo.Kusindikiza kwa 0.5 IC kuyenera kusankha scraper yachitsulo, yomwe imathandizira kuti solder phala ipangidwe pambuyo posindikiza.

2. Kuthamanga kosindikiza: phala la solder lidzapitirira patsogolo pa template pansi pa kukankhira kwa scraper.Kuthamanga kusindikiza kofulumira kumathandizira kuyambika kwa template, koma kudzalepheretsa kutayikira kwa solder phala;Koma liwiro ndilochedwa kwambiri, phala la solder silingagubuduze pa template, zomwe zimabweretsa kusamvana kwa phala la solder losindikizidwa pa solder pad.Nthawi zambiri, liwiro losindikiza la masitayilo abwino ndi 10 ~ 20mm/s

3 makina osindikizira: pakali pano njira yosindikizira yofala kwambiri imagawidwa kukhala "kusindikiza kukhudzana" ndi "kusindikiza kosalumikizana".
Pali kusiyana pakati pa Chinsinsi ndi PCB kusindikiza akafuna ndi "non-kukhudzana yosindikiza", ambiri kusiyana mtengo ndi 0.5 ~ 1.0mm, ubwino wake ndi oyenera osiyana mamasukidwe akayendedwe solder phala.

Palibe kusiyana pakati pa template ndi PCB yosindikiza imatchedwa "kusindikiza kusindikiza".Pamafunika bata la dongosolo lonse, oyenera kusindikiza mkulu mwatsatanetsatane malata Chinsinsi ndi PCB kusunga kukhudzana kwambiri lathyathyathya, pambuyo kusindikiza ndi PCB kulekana, kotero njira iyi kukwaniritsa mkulu kusindikiza molondola, makamaka oyenera katayanitsidwe zabwino, kopitilira muyeso-chabwino. kutalikirana kwa solder phala kusindikiza.

Chifukwa 4: makina a SMTkutalika kwa phiri

Yankho:

Pakuti 0.5mm IC mu okwera ayenera kugwiritsidwa ntchito 0 mtunda kapena 0 ~ 0.1mm okwera kutalika, pofuna kupewa chifukwa cha okwera kutalika ndi otsika kwambiri kuti solder phala kupanga kugwa, chifukwa reflux yochepa dera.