1. Qhov sib nrug ntawm thaj ua rau thaj
Qhov sib nrug ntawm SMD cov khoom yog ib qho teeb meem uas cov engineers yuav tsum tau them sai sai rau thaum lub sij hawm teeb tsa.Yog tias qhov sib nrug me dhau, nws yog qhov nyuaj heev los luam cov tshuaj txhuam hniav thiab tsis txhob muab tshuaj txhuam thiab tinning.
Cov lus pom zoo nyob deb yog raws li nram no
Cov khoom siv nrug deb ntawm thaj ua rau thaj:
Tib yam khoom siv: ≥0.3mm
Cov khoom siv sib txawv: ≥0.13 * h + 0.3mm (h yog qhov siab tshaj plaws qhov sib txawv ntawm cov khoom nyob sib ze)
Qhov kev ncua deb ntawm cov khoom uas tuaj yeem tsuas yog manually patched: ≥1.5mm.
Cov lus qhia saum toj no yog siv rau kev siv nkaus xwb, thiab tuaj yeem ua raws li cov txheej txheem PCB tsim tshwj xeeb ntawm cov tuam txhab uas muag.
2. Qhov kev ncua deb ntawm cov khoom siv hauv kab thiab thaj
Yuav tsum muaj qhov deb txaus ntawm cov cuab yeej hauv-kab tiv thaiv thiab thaj, thiab nws raug pom zoo kom nyob nruab nrab ntawm 1-3 hli.Vim muaj kev ua haujlwm nyuaj, kev siv cov plug-ins ncaj nraim tam sim no tsis tshua muaj.
3. Rau kev tso kawm ntawm IC decoupling capacitor
Lub decoupling capacitor yuav tsum tau muab tso rau ze ntawm lub hwj chim chaw nres nkoj ntawm txhua IC, thiab qhov chaw yuav tsum nyob ze li sai tau rau lub hwj chim chaw nres nkoj ntawm IC.Thaum ib lub nti muaj ntau lub hwj chim chaw nres nkoj, lub decoupling capacitor yuav tsum muab tso rau ntawm txhua qhov chaw nres nkoj.
4. Ua tib zoo saib xyuas qhov kev tso kawm thiab kev ncua deb ntawm cov khoom ntawm ntug ntawm lub rooj tsavxwm PCB.
Txij li thaum PCB feem ntau yog ua los ntawm jigsaw, cov khoom siv ze ntawm ntug yuav tsum tau ua raws li ob qho xwm txheej.
Thawj qhov yuav tsum tau ua tib zoo sib xws rau kev txiav cov kev taw qhia (ua kom lub zog ntawm cov cuab yeej sib xws. Piv txwv li, yog tias lub cuab yeej muab tso rau hauv txoj kev ntawm sab laug ntawm daim duab saum toj no, qhov sib txawv quab yuam cov lus qhia ntawm ob lub ncoo ntawm lub thaj yuav ua rau cov khoom siv thiab cov vuam sib cais tawm.
Qhov thib ob yog tias cov khoom tsis tuaj yeem teem caij nyob rau hauv ib qho kev ncua deb (kom tiv thaiv kev puas tsuaj rau cov khoom thaum lub rooj tsavxwm raug txiav)
5. Ua tib zoo saib xyuas cov xwm txheej uas yuav tsum tau txuas nrog cov ntaub qhwv uas nyob ib sab
Yog tias cov ntaub qhwv uas nyob ib sab yuav tsum tau txuas nrog, thawj zaug paub tseeb tias qhov kev sib txuas yog ua rau sab nraud los tiv thaiv kev sib txuas los ntawm kev sib txuas, thiab xyuam xim rau qhov dav ntawm cov hlau tooj liab nyob rau lub sijhawm no.
6. Yog hais tias lub ncoo ntog nyob rau hauv ib qho chaw ib txwm, cov cua kub dissipation yuav tsum tau xav txog
Yog tias lub ncoo poob rau ntawm qhov chaw pavement, txoj kev yog yuav tsum tau siv los txuas lub ncoo thiab pavement.Tsis tas li, txiav txim siab seb puas yuav txuas 1 kab lossis 4 kab raws li qhov tam sim no.
Yog hais tias txoj kev ntawm sab laug yog saws, nws yog qhov nyuaj dua rau welding los yog kho thiab disassemble lub Cheebtsam, vim hais tias qhov kub yog tag nrho dispersed los ntawm tooj liab nteg, uas ua rau lub vuam tsis yooj yim sua.
7. Yog hais tias cov hlau lead me dua lub plug-in ncoo, yuav tsum tau ib tug teardrop
Yog hais tias cov hlau me dua lub ncoo ntawm cov khoom siv hauv kab, koj yuav tsum tau ntxiv cov teardrops raws li qhia nyob rau sab xis ntawm daim duab.
Ntxiv teardrops muaj cov txiaj ntsig hauv qab no:
(1) Tsis txhob txo qis ntawm cov teeb liab kab dav thiab ua rau muaj kev cuam tshuam, uas tuaj yeem ua rau kev sib txuas ntawm cov kab thiab cov khoom siv hauv ncoo zoo li du thiab hloov pauv.
(2) Qhov teeb meem uas kev sib txuas ntawm lub ncoo thiab cov kab yog yooj yim tawg vim muaj kev cuam tshuam yog daws.
(3) Kev teeb tsa ntawm teardrops tuaj yeem ua rau lub rooj tsav xwm PCB zoo nkauj dua.