Kuyika kolondola kwa zigawo zapamsonkhano pamalo okhazikika a PCB ndicho cholinga chachikulu cha SMT patch processing, pokonza zigamba zidzawonekera mosakayikira zovuta zina zomwe zimakhudza mtundu wa chigamba, monga kusamuka kwa zigawo.
Kawirikawiri, ngati pakupanga chigamba, ngati pali kusintha kwa zigawozo, ndi vuto lomwe likufunika chisamaliro, ndipo maonekedwe ake angatanthauze kuti pali mavuto ena angapo mu ndondomeko yowotcherera. Ndiye chifukwa chiyani kusamuka kwa zigawo mu processing chip?
Zifukwa zofala zamitundu yosiyanasiyana yosinthira phukusi
(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.
Yankhani zifukwa zenizeni
Chifukwa cha kuwotcherera reflow, gawoli likuwonetsa kuyandama. Ngati pakufunika kuyika bwino, ntchito zotsatirazi ziyenera kuchitika:
(1) The solder phala kusindikiza kuyenera kukhala zolondola ndi zitsulo mauna zenera kukula sikuyenera kupitirira 0.1mm m'lifupi kuposa pini chigawo.
(2) Pangani moyenerera pad ndi malo oyikapo kuti zigawozo zitha kusinthidwa zokha.
(1) Popanga, kusiyana pakati pa zigawozo ndikuyenera kukulitsidwa moyenera.
Zomwe zili pamwambazi ndizomwe zimayambitsa kusuntha kwazinthu zomwe zimapangidwira patch, ndipo ndikuyembekeza kukupatsani zofotokozera ~
Nthawi yotumiza: Nov-24-2023
