Feem ntau ntawm cov pcba ua lub Hoobkas yuav ntsib qhov tshwm sim tsis zoo, SMT chip Cheebtsam nyob rau hauv cov txheej txheem ntawm nti ua tiav nqa.Qhov teeb meem no tau tshwm sim nyob rau hauv me me nti capacitive Cheebtsam, tshwj xeeb tshaj yog 0402 nti capacitors, nti resistors, qhov tshwm sim no feem ntau hu ua "monolithic phenomenon".
Yog vim li cas rau tsim
(1) Cheebtsam ntawm ob qhov kawg ntawm solder paste melting lub sij hawm yog tsis synchronized los yog nto nro yog txawv, xws li tsis zoo luam ntawv ntawm solder paste (ib kawg muaj ib tug tsis xws luag), paste bias, Cheebtsam solder kawg loj yog txawv.Feem ntau ib txwm solder paste tom qab lub melting kawg yog rub.
(2) Pad tsim: pad nthuav dav ntev muaj qhov tsim nyog, luv luv lossis ntev dhau los ua rau muaj qhov tshwm sim ntawm kev sawv monument.
(3) Cov tshuaj txhuam hniav yog txhuam ntau dhau thiab cov khoom yog ntab tom qab cov tshuaj txhuam tau yaj lawm.Nyob rau hauv cov ntaub ntawv no, lub Cheebtsam yuav yooj yim raug cua tshuab los ntawm cov cua kub kom tshwm sim phenomenon ntawm sawv monument.
(4) Qhov kub thiab txias qhov chaw: monoliths feem ntau tshwm sim thaum lub sij hawm sib koom ua ke pib yaj.Tus nqi ntawm qhov kub nce nyob ze ntawm lub melting point yog ib qho tseem ceeb heev, qhov qeeb qeeb nws yog qhov zoo dua los tshem tawm qhov tshwm sim ntawm monolith.
(5) Ib qho ntawm cov khoom siv qhov kawg yog oxidized los yog paug thiab tsis tuaj yeem ntub.Ua tib zoo saib xyuas cov khoom nrog ib txheej ntawm cov nyiaj ntawm qhov kawg solder.
(6) Lub ncoo yog paug (nrog silkscreen, solder tiv thaiv number case, adhered nrog txawv teb chaws teeb meem, oxidised).
Mechanism ntawm formation:
Thaum reflow soldering, lub tshav kub yog siv rau sab saum toj thiab hauv qab ntawm lub nti tivthaiv tib lub sijhawm.Feem ntau, nws yog ib txwm lub ncoo nrog qhov loj tshaj plaws nthuav qhov chaw uas yog rhuab ua ntej mus rau ib tug kub ntawm lub melting point ntawm solder paste.Nyob rau hauv txoj kev no, qhov kawg ntawm cov khoom uas yog tom qab wetted los ntawm lub solder nyhav yuav raug rub los ntawm qhov nro ntawm lub solder ntawm lwm kawg.
Kev daws:
(1) kev tsim qauv
Tsim nyog tsim ntawm lub ncoo - kev nthuav dav loj yuav tsum tsim nyog, kom deb li deb tau kom tsis txhob muaj qhov ntev ntawm qhov kev nthuav tawm ua rau sab nrauv ntawm lub ncoo (ncaj) lub kaum sab xis ntawm lub kaum sab xis siab dua 45 °.
(2) Chaw tsim khoom
1. rau siab ntso so lub vas kom paub meej tias cov solder paste qhab nia cov duab tag.
2. qhov tseeb qhov chaw tso kawm.
3. Siv cov tshuaj uas tsis yog-eutectic solder paste thiab txo qhov kub thiab txias thaum lub sij hawm reflow soldering (tswj nyob rau hauv 2.2 ℃ / s).
4. Nyias lub thickness ntawm solder muab tshuaj txhuam.
(3) Cov khoom xa tuaj
nruj me ntsis tswj qhov zoo ntawm cov khoom siv los xyuas kom meej tias thaj chaw zoo ntawm cov khoom siv yog qhov loj tib yam ntawm ob qho kawg (lub hauv paus rau kev tsim qhov nro).
Nta ntawm NeoDen IN12C Reflow Cub
1. Ua-nyob rau hauv vuam fume filtration system, zoo filtration ntawm teeb meem gases, zoo nkauj tsos thiab ib puag ncig tiv thaiv, ntau nyob rau hauv txoj kab nrog kev siv high-end ib puag ncig.
2.Qhov kev tswj hwm muaj cov yam ntxwv ntawm kev sib koom ua ke siab, cov lus teb raws sij hawm, tsis tshua muaj nqi, kev saib xyuas yooj yim, thiab lwm yam.
3. Kev txawj ntse, kev koom ua ke nrog PID tswj algorithm ntawm kev cai-tsim ntse tswj system, siv tau yooj yim, muaj zog.
4. kev tshaj lij, tshwj xeeb 4-txoj kev board nto qhov ntsuas kub ntsuas qhov system, kom lub sijhawm ua haujlwm tiag tiag hauv cov ntaub ntawv tawm tswv yim raws sijhawm thiab cov lus qhia dav dav, txawm tias cov khoom siv hluav taws xob nyuaj tuaj yeem ua haujlwm tau zoo.
5. Kev cai-tsim stainless hlau B-hom mesh siv, ruaj thiab hnav-resistant.Kev siv lub sij hawm ntev tsis yooj yim rau deformation
6. Zoo nkauj thiab muaj lub tswb liab, daj thiab ntsuab ua haujlwm ntawm qhov taw qhia tsim.
Post lub sij hawm: May-11-2023