Ndi zinthu ziti zomwe ziyenera kutsatiridwa PCB mapepala?

Pad ndi mtundu wa dzenje, mapangidwe a pad ayenera kulabadira zinthu zotsatirazi.

1. M’mimba mwake ndi kukula kwa dzenje lamkati la pedi: Dzenje lamkati la pedi nthawi zambiri silikhala lochepera 0.6mm, chifukwa sikophweka kukonza pomwe dzenje lili lochepera 0.6mm. Nthawi zambiri, kukula kwa chikhomo chachitsulo kuphatikiza 0.2mm chimagwiritsidwa ntchito ngati bowo lamkati la pediyo. Ngati chitsulo cholumikizira chitsulo ndi 0.5mm, mkatikati mwa bowo ndi 0.7mm, ndipo m’mimba mwake mumadalira bowo lamkati mwake. dzenje awiri / pedi awiri nthawi zambiri: 0.4 / 1.5; Zamgululi 0.5/1.5;Zamgululi 0.6/2; Zamgululi 0.8/2.5; Zamgululi 1.0/3.0; Zamgululi 1.2/3.5; 1.6/4. Pamene m’mimba mwake wa pedi ndi 1.5 mm, kuti muwonjezere mphamvu yovula ya pedi, kutalika kwa osachepera 1.5 mm, m’lifupi mwake 1.5 mm kutalika kozungulira kungagwiritsidwe ntchito, phala lamtunduwu ndilofala kwambiri. pin pad ya Integrated circuit. Pakuti awiri ziyangoyango kupitirira kukula kwa tebulo pamwamba, chilinganizo zotsatirazi angagwiritsidwe ntchito kusankha: dzenje ndi awiri osachepera 0.4mm: D/D = 1.5-3; Mabowo okhala ndi ma diameter akulu kuposa 2rran: D/ D =1.5-2 (pomwe: D ndi mainchesi a mapadi ndipo D ndi mainchesi a mabowo amkati)

2. Mtunda pakati pa m’mphepete mwa dzenje lamkati la pad ndi m’mphepete mwa bolodi losindikizidwa liyenera kukhala lalikulu kuposa 1 mm, kuti mupewe chilema cha pad panthawi yokonza.

3. Pamene waya wolumikizidwa ndi pad ndi wochepa thupi, kugwirizana pakati pa pad ndi waya kumapangidwa kukhala mawonekedwe a droplet, omwe si ophweka kupukuta pad, ndipo waya ndi pad sizovuta kutulutsa.

4. Mapadi oyandikana nawo kuti apewe kulowera pachimake kapena kudera lalikulu la zojambulazo zamkuwa. A pachimake Angle adzayambitsa mafunde ku soldering zovuta, ndipo pali chiwopsezo cha mlatho, malo aakulu zojambulazo zamkuwa chifukwa cha kutentha kwambiri kutayika kumabweretsa zovuta kuwotcherera.