Tam sim no, kev siv cov hmoov txhuas uas tsis muaj cov tshuaj txhuas hauvSMT tshuabua cov khoom lag luam tau dhau los ua cov cuab yeej ua lag luam muab tshuaj. Thaum siv cov hmoov txhuas-dawb ham muab tshuaj, nws yooj yim kom pom tias cov pob qij txuas tsis muaj ci txaus, uas tsis tau ua tiav qhov ci ci ntawm cov neeg yuav khoom. Yuav ua li cas peb thiaj txhim kho solder ob leeg teeb meem teeb meem?
Nov yog qee txoj hauv kev los txhim kho qhov ci ci ntawm cov pob qij:
I.Choose solder paste nrog zoo oxidation tsis kam thiab cov ntsiab lus nyiaj siab
Lead-free sold paste muab tso rau hauv huab cua, yooj yim rau qhov hloov pauv tsis xeb, txo qhov kev ua tau zoo ntawm cov ntawv ci ham, tom qab ntawd qhov ci ci ntawm cov ntawv ci ham ua kom sib koom tes tsis zoo, yog li peb yuav tsum xaiv cov oxidation zoo tsis kam solder muab tshuaj txhuam, thaum zam kev kev siv cov hmoov txhuas uas tsis muaj cov hmoov txhuas tso rau hauv cov huab cua rau ntau tshaj 24 teev. Xaiv cov hmoov txhuas-dawb ham muab tshuaj nrog cov ntsiab lus nyiaj ntau, thiab tuaj yeem nce qhov ci ci ntawm cov hmoov txhuas tsis muaj cov hmoov txhuas ua kom zoo siab sib koom ua ke, tab sis nce cov ntsiab lus ntawm cov nyiaj, tus nqi yuav nce siab, uas yuav yog cov peev xwm ntawm txhua qhov chaw tsim khoom.
II.Improve reflow vuam txheej txheem
Ua ntej, ntxiv cov nitrogen thaum reflow ua rau lub ci ci kev sib koom ua ke ntawm cov hmoov txhuas uas tsis muaj cov tshuaj nplaum. Muaj lwm qhov laj thawj yog vim li cas qhov ci ntawm kev sib koom nrog cov cam ua ke tsis txaus, uas yog, seem flux. Lub sijhawm no, qhov kub lub ntsuas cua ntawm reflow soldering tuaj yeem hloov kho, thiab qhov tsis tu ncua qhov kub ntawm lub sijhawm ntawm reflow soldering tuaj yeem tsim nyog, thiaj li hais tias flux tuaj yeem hloov mus rau ntau qhov, thiab nws tuaj yeem pab ua kom lub teeb ci ua ke.
III.Qhov xaiv tseeb ntawm flux
Qee zaum solder pob qij txha yuav nyob twj ywm daj khoom, qhov no yog vim muaj cov seem flux, yog li txhawm rau txhim kho qhov ci ci ntawm cov pob qij txuas, tab sis kuj xaiv qhov tseeb ntawm flux, kev xaiv ntawm tu flux yuav muaj qee yam kev pab rau qhov ci ntawm ham koom.
Yog tias koj xav siv cov hmoov txhuas-dawb ham muab tshuaj txhuam, qhov ci ci ntxiv rau kev sib koom tes, txoj hauv kev zoo yog txhawm rau nce cov ntsiab lus ntawm cov nyiaj, tab sis tus nqi yuav ib txwm nce, uas feem ntau txwv rau ntau tus neeg.
Yog li no, txoj kev ua hauj lwm zoo dua yog kev txhim kho reflow vuam txheej txheem, xaiv zoo muab tshuaj txhuam thiab flux.
Kuv vam tias kuv tuaj yeem pab koj.