Dab tsi yog Circuit Board conformal txheej?cov nyhuv yog dab tsi?
Yuav ua li cas kom cov khoom ruaj khov nyob rau hauv ib puag ncig hnyav kuj yog lub ntsiab lus tseem ceeb.Peb yuav ua li cas tiv thaiv peb cov khoom precision los ntawm cov teebmeem no puas tsuaj?Thaum xub thawj, cov khoom siv hluav taws xob tau tiv thaiv los ntawm txoj kev hu ua potting.Qhov no ua tiav los ntawm kev kaw cov khoom siv hluav taws xob hauv ib lub hnab yas kev cai uas qhib rau ntawm ib qho kawg, zoo li ib qho oddly zoo li tus planter.Tom qab ntawd sau nws nrog qee cov khoom siv tsis zoo xws li acrylic lossis silicone.Qhov no tiv thaiv cov cuab yeej los ntawm ib puag ncig sab nraud, tab sis siv sijhawm ntev, hnyav, hnyav thiab kim heev.Tsawg tus neeg sab nraud ntawm tub rog lossis cov neeg siv khoom lag luam tuaj yeem siv tau tiag tiag.Raws li cov khoom siv hluav taws xob ua me me thiab qhov chaw, qhov hnyav, lub sijhawm thiab tus nqi tseem ceeb dua, lwm txoj kev txhawb nqa tau dhau los ua ntau dua: txheej txheej txheej, tus qauv rau txheej txheej feem ntau yog txheej tuab tsawg dua 0.21mm.
Conformal txheej yog daim ntawv thov cov ntaub ntawv los pleev xim rau saum npoo ntawm cov khoom los tiv thaiv cov khoom siv hluav taws xob los ntawm qhov chaw hnyav.Feem ntau yog rau cov dej noo.Cov kev lag luam uas niaj hnub siv cov txheej txheem sib txawv kuj tseem nthuav dav, tab sis tshwj xeeb tshaj yog kev kho mob, tub rog, marine, automotive thiab industrial.Conformal coatings kuj tseem siv tau rau qee yam khoom tiav uas feem ntau raug dej lossis tshuaj lom neeg ib puag ncig, xws li tshuab ntxhua khaub ncaws, tshuab ntxhua khaub ncaws, lossis lwm yam khoom siv tsim los sab nraum zoov, xws li lub koob yees duab kev ruaj ntseg.Ntxiv nrog rau kev tiv thaiv cov khoom siv hluav taws xob, cov txheej txheem txheej txheem tuaj yeem siv rau hauv cov ntawv thov kom zoo nkauj xws li ntxiv khawb lossis oxidation tsis kam rau qhov chaw (cov tsho ntshiab ntawm lub tsheb), ntxiv cov glossy lossis slick zoo rau cov casings, ntxiv smudges / ntiv tes lossis txawm hloov cov khoom kho qhov muag ntawm lub lens.
Yuav ua li cas tswj lub Circuit Court board?
Muaj ntau txoj hauv kev ntawm txheej txheej Circuit Court boards, txhua tus yuav tsum muaj cov ntaub ntawv sib txawv kom ua tiav.Ua ntej, koj yuav tsum txiav txim siab seb lub hom phiaj ntawm txheej yog dab tsi.Puas yog koj tiv thaiv PCBA los ntawm huab cua, ntau yam roj, txhua yam kev co, pwm, thiab lwm yam?Cov ntaub ntawv sib txawv yog siv rau ntau lub hom phiaj, thiab chemistry siv rau txheej txheej txhais tau hais tias cov txheej tuaj yeem ua tiav.Piv txwv li, yog tias koj xav tiv thaiv koj lub PCBA los ntawm cov dej noo thiab ntsev tsuag, thiab xav ua kom muaj zog tiv thaiv ESD, parylene yuav yog qhov kev xaiv zoo.Txawm li cas los xij, yog hais tias cov ntsiab lus ntawm PCBA yog rhiab heev rau cov cua sov los yog lub tshuab nqus tsev, parylene tsis yog ib qho kev xaiv zoo vim tias ob qho tib si muaj nyob rau hauv cov txheej txheem parylene.Acrylic tsis tuaj yeem ua hluav taws xob ntau, tab sis nws yuav tiv thaiv koj lub PCBA los ntawm noo noo thiab ntsev tsuag.Nws kuj tuaj yeem siv rau ntau txoj hauv kev ntawm chav tsev kub.
Classification thiab Raw Materials ntawm Conformal Coatings
Acrylics yog feem ntau siv cov xim niaj hnub no.Nws kuj yog cov khoom siv pheej yig tshaj plaws hauv kev siv.Nws lub ntsiab zoo yog tus nqi thiab yooj yim ntawm kev tuav, tab sis nws kuj muaj qee qhov tsis zoo.Lub tshav kub softens nws, thiab nws yog flammable, txhais tau tias nws yuav ua nkig nyob rau hauv tej yam kev mob thiab, zoo li ib co pwm, raug rau cov tshuaj puas thiab lom lom.Yog tias yuav tsum tau ua dua tshiab, nws tuaj yeem raug tshem tawm siv cov kuab tshuaj los yog cua sov.
Polyurethane yog lwm txheej txheej.Muab nws cov nplua nuj hydrophobic thiab oleophobic, nws yog ib qho khoom siv zoo heev.Txawm li cas los xij, cov khoom qub no txhais tau tias nws tsis tshua muaj feem cuam tshuam rau lwm qhov chaw, thiab delamination yuav tsum tau txo qis.Rework xav tau cov kuab tshuaj tshwj xeeb kom tshem tawm.
Silicones muaj cov khoom tshwj xeeb uas ua rau lawv muaj txiaj ntsig zoo nyob rau hauv qhov chaw uas lwm tus tsis yog.Nws yog resistant rau kub kub, biologically thiab chemically inert, thiab ib txhij hydrophobic thiab oleophobic.Cov khoom no kuj txhais tau hais tias nws nyuaj rau kev sib xyaw nrog lwm cov ntaub ntawv, thiab kev txo qis yuav tsum tau coj los tiv thaiv delamination.Nws cov roj hmab zoo nkauj thiab tshuaj lom neeg kuj txhais tau tias nws yuav tsum tau muab tshem tawm mechanically rau rework.
Epoxy resin yog cov khoom siv tawv heev uas kuj muaj qee qhov tshwj xeeb siv.Nws rigidity txhais tau tias nws yuav siv tau raws li ib tug neeg kho tshuab reinforcement, tab sis ntau nthuav nws yuav siv tau raws li ib tug kev ruaj ntseg ntaus ntawv.Kev sib xyaw epoxy nrog rau lwm cov ntaub ntawv, xws li crossbars, tsim cov qauv nruj uas yuav rhuav tshem nws tus kheej thiab cov khoom siv uas nyob ib sab yog sim ua kom sib cais ntawm PCBA.Epoxies kuj yog kub thiab tshuaj tiv thaiv.Nws hardness thiab teem sij hawm kuj tsis zoo raws li nws nce lub sij hawm ua thiab ua rework yuav luag tsis yooj yim sua.
Nanocoatings yog ib qho kev daws teeb meem.Raws li cov thev naus laus zis no loj tuaj, cov khoom thiab kev ua haujlwm ntawm nanocoatings tau hloov zuj zus sai.Ib qho hnyav uas muaj cov nanoparticles raug tshem tawm yog siv rau lub phaj, thiab lub phaj yog tom qab cua qhuav los yog ci hauv qhov cub.Lub qhov cub kuj melts cov nanoparticles rau hauv ib lub khob zoo li substrate.Lub ultra-thin xwm ntawm nanocoatings txhais tau hais tias lawv raug hnav tab sis yooj yim rau rework.
Post lub sij hawm: Jun-19-2023