Xaiv thiab tso tshuabthiab lwm yam khoom siv SMT hauv kev tsim khoom thiab kev ua haujlwm yuav tshwm sim ntau yam tsis zoo, xws li monument, choj, virtual vuam, fake vuam, txiv hmab txiv ntoo pob, tin hlaws thiab lwm yam.SMT SMT ua luv luv Circuit Court yog ntau dua nyob rau hauv qhov zoo sib nrug ntawm IC pins, ntau dua nyob rau hauv 0.5mm thiab hauv qab ntawm qhov sib nrug ntawm IC pins, vim nws qhov me me, tsis tsim qauv tsim los yog luam ntawv yog ib qho yooj yim los tsim me ntsis omission.
Ua rau thiab kev daws teeb meem:
Ua rau 1:Stencil template
Kev daws:
Lub qhov phab ntsa ntawm cov hlau mesh yog du, thiab kev kho electropolishing yuav tsum tau ua nyob rau hauv cov txheej txheem ntau lawm.Qhov qhib ntawm lub mesh yuav tsum yog 0.01mm los yog 0.02mm wider tshaj qhov qhib ntawm lub mesh.Qhov qhib yog inverted conical, uas yog conducive rau qhov zoo tso tawm tin paste nyob rau hauv lub tin, thiab yuav txo tau lub sij hawm ntxuav ntawm lub mesh phaj.
Ua rau 2: solder muab tshuaj txhuam
Kev daws:
0.5 hli thiab hauv qab lub suab ntawm IC solder paste yuav tsum tau xaiv nyob rau hauv qhov loj ntawm 20 ~ 45um, viscosity nyob rau hauv 800 ~ 1200pa.S
Ua rau 3: Solder paste tshuab luam ntawvluam ntawv
Kev daws:
1. Hom scraper: lub scraper muaj ob hom yas scraper thiab steel scraper.Lub 0.5 IC luam ntawv yuav tsum xaiv cov hlau scraper, uas yog qhov tsim nyog rau kev sib sau ua ke tom qab luam ntawv.
2. Printing ceev: lub solder paste yuav dov rau pem hauv ntej ntawm lub template nyob rau hauv lub laub ntawm lub scraper.Kev luam ntawv ceev ceev yog qhov tsim nyog rau lub caij nplooj ntoos hlav ntawm lub template, tab sis nws yuav cuam tshuam rau cov khoom siv tshuaj tua kab;Tab sis qhov ceev yog qeeb heev, solder paste yuav tsis yob ntawm lub template, uas ua rau cov kev daws teeb meem tsis zoo ntawm solder paste luam tawm ntawm cov ntaub qhwv.Feem ntau, kev luam ntawv nrawm ntawm qhov sib txawv yog 10 ~ 20mm / s
3 hom kev luam ntawv: tam sim no feem ntau hom luam ntawv tau muab faib ua "kev sib cuag luam ntawv" thiab "tsis tiv tauj luam ntawv".
Muaj qhov sib txawv ntawm cov qauv thiab PCB luam ntawv hom yog "tsis yog-kev sib cuag luam ntawv", qhov sib txawv ntawm tus nqi yog 0.5 ~ 1.0mm, nws qhov zoo dua yog tsim rau cov viscosity sib txawv.
Tsis muaj qhov sib txawv ntawm tus qauv thiab PCB luam ntawv yog hu ua "hu rau luam ntawv".Nws yuav tsum muaj kev ruaj ntseg ntawm tag nrho cov qauv, haum rau kev luam ntawv siab precision tin template thiab PCB kom ib tug heev tiaj tus sib cuag, tom qab luam ntawv thiab PCB sib cais, yog li no txoj kev mus cuag high printing raug, tshwj xeeb tshaj yog haum rau zoo spacing, ultra-fine. sib nrug ntawm solder paste printing.
Ua rau 4: SMT tshuabMount qhov siab
Kev daws:
Rau 0.5 hli IC nyob rau hauv lub mounting yuav tsum tau siv 0 nrug los yog 0 ~ 0.1 hli mounting qhov siab, nyob rau hauv thiaj li yuav zam vim lub mounting qhov siab yog tsawg heev thiaj li hais tias solder muab tshuaj txhuam txoj kev sib tsoo, ua rau reflux luv luv Circuit Court.
Post lub sij hawm: Aug-06-2021