SMT ndi imodzi mwazinthu zofunika kwambiri pazigawo zamagetsi, zomwe zimatchedwa njira zolumikizirana zakunja, zogawika popanda pini kapena kutsogolera kwaufupi, ndi kudzera munjira ya reflow soldering kapena kuviika kusungunula ku msonkhano wowotcherera wa njira za msonkhano wadera. Electronic Assembly industry ndi njira.Kupyolera mu ndondomeko ya teknoloji ya SMT kukweza zigawo zing'onozing'ono komanso zopepuka, kuti gulu lozungulira likwaniritse zozungulira zazikulu, zofunikira za miniaturization, zomwe zilinso pa SMT popempha luso lokonzekera.
I. SMT processing solder phala zofunika kulabadira
1. Kutentha kosalekeza: zoyambira mufiriji kutentha kutentha kwa 5 ℃ -10 ℃, chonde musapitirire 0 ℃.
2. Kuchokera posungira: ayenera kutsatira malangizo a m'badwo woyamba kunja, musapange solder phala mu mufiriji yosungirako nthawi yaitali kwambiri.
3. Kuzizira: Mangitsani phala la solder mwachibadwa kwa maola osachepera 4 mutatulutsa mufiriji, musatseke chipewa pamene mukuzizira.
4. Mkhalidwe: Kutentha kwa msonkhano ndi 25±2℃ ndi chinyezi chachifupi ndi 45% -65%RH.
5. Phula lakale la solder: Mukatsegula chivundikiro cha solder paste pasanathe maola 12 kuti mugwiritse ntchito, ngati mukufuna kusunga, chonde gwiritsani ntchito botolo lopanda kanthu kuti mudzaze, ndikumangiriranso mufiriji kuti musunge.
6. pa kuchuluka kwa phala pa stencil: nthawi yoyamba pa kuchuluka kwa solder phala pa stencil, kuti kusindikiza kasinthasintha musawoloke scraper kutalika kwa 1/2 ngati zabwino, kuchita khama anayendera, khama Kuwonjezera nthawi kuwonjezera ndalama zochepa.
II.SMT Chip processing kusindikiza ntchito zofunika kulabadira
1. scraper: scraper material ndi bwino kutengera zitsulo scraper, zothandiza kusindikiza pa PAD solder phala akamaumba ndi kuchotsa filimu.
Ngodya yopukutira: kusindikiza pamanja kwa madigiri 45-60;makina osindikizira kwa madigiri 60.
Liwiro losindikiza: Buku la 30-45mm / min;makina 40mm-80mm/min.
Kusindikiza zinthu: kutentha pa 23 ± 3 ℃, chinyezi wachibale 45% -65% RH.
2. Stencil: Kutsegula kwa stencil kumachokera ku makulidwe a stencil ndi mawonekedwe ndi gawo la kutsegula malinga ndi pempho la mankhwala.
3. QFP / CHIP: malo apakati ndi osachepera 0.5mm ndipo 0402 CHIP amafunika kutsegulidwa ndi laser.
Stencil yoyesera: kuti muyimitse kuyesa kwamphamvu kwa stencil kamodzi pa sabata, kuchuluka kwamphamvu kumafunsidwa kukhala pamwamba pa 35N/cm.
Kuyeretsa stencil: Mukamasindikiza ma PCB 5-10 mosalekeza, pukutani pensulo kamodzi ndi pepala lopukuta lopanda fumbi.Musagwiritse ntchito nsanza.
4. Ntchito yoyeretsa: IPA
Zosungunulira: Njira yabwino yoyeretsera stencil ndi kugwiritsa ntchito IPA ndi zosungunulira za mowa, osagwiritsa ntchito zosungunulira zomwe zili ndi chlorine, chifukwa zidzawononga mapangidwe a solder phala ndikukhudza khalidwe.
Nthawi yotumiza: Jul-05-2023