Kuyika kolondola komanso kolondola kwa zida zosonkhanitsidwa pamwamba pamalo okhazikika a PCB ndicho cholinga chachikulu cha SMT patch processing. Komabe, pokonzekera, padzakhala mavuto ena, omwe adzakhudza ubwino wa chigambacho, chomwe chimakhala chofala kwambiri ndi vuto la kusamuka kwa chigawocho.
Zifukwa zosiyanasiyana zosinthira ma phukusi zimasiyana ndi zomwe zimachitika nthawi zambiri
(1) The reflow kuwotcherera ng'anjo liwiro mphepo ndi lalikulu kwambiri (makamaka amapezeka pa BTU ng'anjo, ang'onoang'ono ndi mkulu zigawo zikuluzikulu n'zosavuta kuloza).
(2) Kugwedezeka kwa njanji yowongolera njira, ndi kufalikira kwa chokwera (zigawo zolemera)
(3) Mapangidwe a pad ndi asymmetrical.
(4) Kukweza kwapadi yokulirapo (SOT143).
(5) Zigawo zokhala ndi zikhomo zocheperako ndi zipata zazikuluzikulu ndizosavuta kukokedwa cham'mbali ndi kupsinjika kwa solder. Kulekerera kwa zigawo zotere, monga SIM makadi, mapepala kapena zitsulo mauna Windows ayenera kukhala osachepera pini m'lifupi mwa chigawo chimodzi kuphatikiza 0.3mm.
(6) Miyeso ya mbali zonse ziwiri za zigawozo ndi zosiyana.
(7) Mphamvu yosagwirizana pazigawo, monga phukusi loletsa kunyowetsa, dzenje loyika kapena khadi yoyika slot.
(8) Pafupi ndi zigawo zomwe zimakhala zosavuta kutulutsa mpweya, monga tantalum capacitors.
(9) Nthawi zambiri, phala la solder ndi ntchito yamphamvu sikophweka kusuntha.
(10) Chilichonse chomwe chingayambitse khadi yoyimilira chimayambitsa kusamuka.
Pazifukwa zenizeni:
Chifukwa cha kuwotcherera reflow, gawoli likuwonetsa kuyandama. Ngati pakufunika kuyika bwino, ntchito zotsatirazi ziyenera kuchitika:
(1) Kusindikiza kwa solder phala kuyenera kukhala kolondola ndipo kukula kwa zenera la mesh kuyenera kukhala kokulirapo kwa 0.1mm kuposa pini yachigawo.
(2) Pangani moyenerera pad ndi malo oyikapo kuti zigawozo zitha kusinthidwa zokha.
(3) Popanga, kusiyana pakati pa zigawozo ndikuyenera kukulitsidwa moyenera.
Nthawi yotumiza: Mar-08-2024
