Dab tsi yog Peb Qhov Kev Tiv Thaiv Ntawm Cov Txheej Txheem Txheej Txheem ntawm PCBA?

Qhov tseeb, nyob rau hauv ib puag ncig uas muaj cov tshuaj (xws li roj, coolant, thiab lwm yam), kev vibration, noo noo, ntsev tsuag, av noo thiab kub, Circuit Court boards tsis conformal txheej yuav corroded, pwm loj hlob thiab tsim teeb meem xws li luv luv circuits lead. rau Circuit Court tsis ua haujlwm. Kev siv cov txheej txheem txheej txheem tuaj yeem tiv thaiv Circuit Court los ntawm kev puas tsuaj, yog li txhim kho kev ntseeg siab ntawm lub rooj tsavxwm Circuit Court, ua rau nws muaj kev nyab xeeb, thiab ua kom nws lub neej ua haujlwm. Qhov no yog qhov tseem ceeb ntawm conformal txheej.

Tsis tas li ntawd, lwm qhov kom zoo dua ntawm Conformal Txheej yog tias nws tuaj yeem tiv thaiv kom tsis txhob muaj cov pa tawm, yog li tso cai rau lub zog ntau dua thiab ze dua cov ntawv luam tawm qhov sib txawv, yog li ua tau raws li lub hom phiaj ntawm kev tivthaiv miniaturization.

Conformal Txheej Khoom
Raws li kev xav tau sib txawv, muaj ntau hom Conformal Txheej ntawm kev ua lag luam xaiv los ntawm. Ntawm lawv, feem ntau hom yog epoxy resin conformal txheej, acrylic conformal txheej thiab polyurethane conformal txheej.
Epoxy resin conformal txheej muaj cov khoom siv hluav taws xob zoo thiab cov khoom siv hluav taws xob thiab siv dav hauv cov khoom siv hluav taws xob. Nws txheej txheem txheej muaj xws li kev kho deg, kev npaj xim, txheej, ziab thiab kho.
Ua ntej, PCB pawg thawj coj saib yuav tsum tau ua kom tiav kom tshem tawm cov impurities thiab roj kom ntseeg tau qhov adhesion ntawm cov xim zaj duab xis. Tom ntej no, sib tov cov xim epoxy resin thiab diluting hnyav nyob rau hauv ib qho kev faib ua feem kom cov xim, thiab do tusyees. Tom qab ntawd, siv cov tshuaj tsuag los yog dip txheej kom sib npaug ntawm cov xim ntawm PCB board. Tom qab txheej txheej tiav lawm, cov xim pleev xim rau zaj duab xis yuav tsum tau tso cai kom qhuav rau lub sijhawm tsim nyog kom tso cai rau nws tsim cov txheej txheem tiv thaiv zoo. Thaum kawg, nws yog qhuav los yog kho nrog ib tug curing neeg sawv cev los txhim kho lub hardness thiab corrosion kuj ntawm cov xim zaj duab xis.
Acrylic conformal txheej yog txheej txheej nrog zoo rwb thaiv tsev, noo noo tsis kam thiab tshuaj tiv thaiv. Cov txheej txheem txheej yog zoo ib yam li cov epoxy resin conformal txheej, uas tseem yuav tsum tau kho deg, pleev xim, txheej, ziab thiab kho.
Polyurethane Conformal Txheej yog txheej txheej txheej nrog siab rwb thaiv tsev lub zog thiab corrosion kuj. Cov txheej txheem txheej yog me ntsis txawv ntawm ob qho dhau los. Ua ntej txheej, cov xim yuav tsum tau hloov kho vim polyurethane xim muaj ntau yam xim xaiv. Thaum txheej txheej, tshuaj tsuag txheej lossis dip txheej tuaj yeem siv tau. Tom qab txheej txheej tiav, nws yuav tsum tau qhuav thiab kho.
Cov txheej txheem sib txawv ntawm cov txheej txheem sib txawv muaj qee qhov sib txawv hauv cov txheej txheem txheej, xws li kev kho deg, kev npaj xim, txheej, ziab thiab kho. Txawm li cas los xij, vim muaj cov ntaub ntawv sib txawv, qee cov ntsiab lus hauv txheej txheej txheej yuav txawv.

Conformal Txheej txheej txheem kev faib tawm
Thawj yog hnyav-raws li Conformal Txheej, uas tuaj yeem siv los ntawm kev txhuam hniav, tes txau lossis tshuab txau, thiab tom qab ntawd ziab hauv chav sov lossis kho los ntawm cua sov. Solvent-based conformal txheej muaj ntau cov kuab tshuaj, uas muaj qhov tsis zoo ntawm kev ua tsis taus pa, siab nyob rau hauv VOC (Volatile Organic Compounds), thiab qis hauv flash point. Yog li ntawd, nws muaj ntxhiab tsw, tsis tuaj yeem tawm ncaj qha, thiab yog nplaim taws thiab tawg. Nws yog qhov zoo tshaj plaws rau kev cob qhia ua haujlwm yog qhov chaw kaw thiab muab kev tiv thaiv tus kheej. Cov ntaub ntawv raw kuj yuav tsum tau tswj kom zoo dua los txo cov kev pheej hmoo ntawm kev siv. Nyob rau tib lub sijhawm, nws yog ib qho tsim nyog yuav tsum tau nce cov khoom siv kho mob kom tau raws li kev tiv thaiv ib puag ncig. Lub thickness ntawm zaj duab xis tom qab txheej yog feem ntau tswj ntawm txog 150um rau zaj duab xis ntub thiab 30um rau zaj duab xis qhuav. Yog tias nws tuab heev, nws yog qhov pov tseg, thiab yog tias nws nyias dhau, qhov kev tiv thaiv yuav tsis zoo.
Qhov thib ob yog UV (ultraviolet light) Conformal Coating, uas tuaj yeem siv los ntawm kev txhuam hniav, tes txau lossis tshuab txau, thiab tuaj yeem kho tau sai hauv UV teeb. Nws cov yam ntxwv yog tias nws yuav luag tsis muaj volatile, tsis muaj VOC, tsis yog-flammable thiab tsis tawg, ua tau raws li UL94 nplaim taws retardant, thiab nws muaj nws tus kheej fluorescence rau kev soj ntsuam yooj yim. Lub thickness ntawm zaj duab xis tom qab txheej yog feem ntau tswj ntawm txog 80-100um rau zaj duab xis ntub dej thiab 60-80um rau zaj duab xis qhuav.
Qhov thib peb yog Parylene lub tshuab nqus tsev conformal txheej, uas siv cov cuab yeej nqus vapor deposition rau dip-coat PCBA. Active me me molecules "loj" ib tug tag nrho conformal polymer zaj duab xis txheej nyob rau saum npoo ntawm substrate, yog li lub sij hawm kho yog ntev dua. Nws yog tus cwj pwm los ntawm tsis muaj qhov kawg ntawm txheej txheej, kev tiv thaiv kev ua haujlwm zoo tab sis tsis tshua muaj txheej txheej. Zaj duab xis thickness tom qab txheej yog hais txog 20um.
Conformal Txheej txheej txheem yuav tsum tau thiab txheej txheem specifications

Painting xav tau:
1. Thickness: Cov xim zaj duab xis thickness yog tswj ntawm 0.05mm-0.15mm. Qhuav zaj duab xis thickness 25um-40um.
2. Cov txheej txheem thib ob: txhawm rau ua kom cov khoom tuab nrog kev tiv thaiv siab, koj tuaj yeem tos rau cov xim pleev xim rau kom ruaj khov ua ntej ua cov txheej txheem thib ob (txiav txim siab seb puas yuav ua cov txheej txheem thib ob raws li qhov xav tau).
3. Kev tshuaj xyuas thiab kev kho: Pom pom seb lub rooj tsav xwm txheej txheej puas ua tau raws li qhov yuav tsum tau ua, thiab kho cov teeb meem. Piv txwv li, yog cov pins thiab lwm qhov chaw tiv thaiv yog stained nrog conformal txheej, koj tuaj yeem siv cov tweezers los tuav cov paj rwb uas nqus tau los yog ntxuav cov paj rwb dipped hauv dej ntxhua kom huv si. Thaum txhuam, ceev faj tsis txhob ntxuav cov xim pleev xim ib txwm.
4. Kev hloov cov khoom siv: Tom qab cov xim pleev xim tau kho, yog tias koj xav hloov cov khoom, ua raws li hauv qab no:
(1) Siv hluav taws xob ferrochrome ncaj qha rau cov khoom siv, thiab tom qab ntawd siv cov ntaub paj rwb dipped hauv cov dej ntxuav dej los ntxuav cov khoom nyob ib ncig ntawm cov ntaub qhwv.
(2) Soldering hloov Cheebtsam
(3) Siv cov txhuam dipped nyob rau hauv conformal anti-paint pleev xim rau cov welded qhov chaw, thiab cia cov xim zaj duab xis kom qhuav thiab solidify.
Cov kev cai ua haujlwm:
1. Qhov chaw ua haujlwm Conformal Coating yuav tsum tsis muaj plua plav thiab huv si, tsis muaj plua plav ya. Kev ntsuas cua zoo yuav tsum tau muab, thiab cov neeg ua haujlwm tsis cuam tshuam raug txwv tsis pub nkag mus.
2. Hnav cov khoom siv tiv thaiv xws li lub qhov ncauj qhov ntswg lossis lub qhov ncauj qhov ntswg, hnab looj tes roj hmab, tsom iav tshuaj tiv thaiv, thiab lwm yam thaum lub sijhawm ua haujlwm kom tsis txhob muaj kev puas tsuaj rau lub cev.
3. Tom qab ua haujlwm tiav lawm, cov cuab yeej siv yuav tsum tau muab ntxuav kom huv si raws sijhawm, thiab lub thawv uas muaj Cov Txheej Txheem Txheej Txheem yuav tsum raug kaw thiab kaw kom nruj.
4. Kev ntsuas tiv thaiv zoo li qub yuav tsum tau coj los siv rau cov khoom siv hluav taws xob. Circuit boards yuav tsum tsis txhob muab tso rau saum ib leeg. Thaum lub sij hawm txheej txheej, Circuit Court boards yuav tsum tau muab tso rau kab rov tav.
Cov kev xav tau zoo:
1. Yuav tsum tsis muaj cov xim ntws los yog poob rau ntawm qhov chaw ntawm lub rooj tsavxwm. Thaum siv cov xim pleev xim nrog txhuam, ceev faj kom tsis txhob poob rau ntawm qhov chaw sib cais.
2. Cov txheej txheej Conformal yuav tsum du, ci, thiab tsis sib xws nyob rau hauv tuab los tiv thaiv qhov chaw ntawm cov ntaub qhwv, cov khoom siv los yog cov khoom siv.
3. Yuav tsum tsis muaj npuas, pinholes, ripples, shrinkage qhov, plua plav thiab lwm yam tsis xws luag thiab txawv teb chaws cov khoom nyob rau saum npoo ntawm cov xim txheej thiab cov khoom. Yuav tsum tsis muaj hmoov los yog tev. Lus Cim: Tsis txhob kov cov xim ntawm lub siab ua ntej cov xim zaj duab xis yuav qhuav. daim nyias nyias.
4. Ib feem ntawm cov khoom sib cais lossis thaj chaw tsis tuaj yeem coated nrog Conformal Txheej.