Precise thiab meej installation ntawm nto-sib tshooj Cheebtsam mus rau lub taag txoj hauj lwm ntawm lub PCB yog lub hom phiaj tseem ceeb ntawm SMT patch processing. Txawm li cas los xij, nyob rau hauv cov txheej txheem ntawm kev ua, yuav muaj qee qhov teeb meem, uas yuav cuam tshuam rau qhov zoo ntawm thaj chaw, ntawm cov uas ntau dua yog qhov teeb meem ntawm cov khoom tawg.
Kev ntim khoom sib txawv ua rau txawv ntawm cov laj thawj
(1) Lub reflow vuam rauv cua kub ceev yog loj heev (feem ntau tshwm sim ntawm BTU rauv, me me thiab siab Cheebtsam yog yooj yim rau hloov).
(2) Kev vibration ntawm cov lus qhia kev tsheb ciav hlau, thiab kev sib kis ntawm lub mounter (cov khoom hnyav dua)
(3) Lub ncoo tsim yog asymmetrical.
(4) Loj-loj nqa nqa (SOT143).
(5) Cheebtsam nrog tsawg tus pins thiab loj spans yog ib qho yooj yim rau rub tawm sab los ntawm lub solder nto nro. Lub siab ntev rau cov khoom xws li SIM phaib, pads lossis steel mesh Windows yuav tsum tsawg dua tus pin dav ntawm cov khoom ntxiv rau 0.3mm.
(6) Qhov ntev ntawm ob qhov kawg ntawm cov khoom sib txawv.
(7) Lub zog tsis sib xws ntawm cov khoom siv, xws li pob los tiv thaiv kev ntub dej, qhov chaw tso lub qhov lossis daim npav teeb tsa.
(8) Tom ntej no mus rau cov khoom uas nquag tso pa tawm, xws li tantalum capacitors.
(9) Feem ntau, cov tshuaj txhuam hniav uas muaj zog ua haujlwm tsis yooj yim rau kev hloov.
(10) Txhua yam uas tuaj yeem ua rau daim npav sawv cev yuav ua rau kev hloov pauv.
Rau cov laj thawj tshwj xeeb:
Vim yog reflow welding, cov khoom qhia txog lub xeev ntab. Yog tias xav tau qhov chaw kom raug, cov haujlwm hauv qab no yuav tsum tau ua:
(1) Lub tshuab luam ntawv muab tshuaj txhuam yuav tsum yog qhov tseeb thiab cov hlau mesh qhov rais loj yuav tsum tsis txhob ntau tshaj 0.1mm wider tshaj li tus pin tivthaiv.
(2) Tsim nyog tsim lub ncoo thiab kev teeb tsa txoj haujlwm kom cov khoom tuaj yeem hloov kho tau.
(3) Thaum tsim, qhov sib txawv ntawm cov khoom siv thiab nws yuav tsum tau nthuav dav kom tsim nyog.
Post lub sij hawm: Mar-08-2024
