Delamination yog ib qho teeb meem tseem ceeb nyob rau hauv daim teb ntawm rigid-flex printed circuit boards (PCBs). Nws hais txog kev sib cais lossis kev tshem tawm ntawm cov txheej txheem hauv PCB, uas tuaj yeem cuam tshuam rau nws qhov kev ua tau zoo thiab kev ntseeg tau. Kev delamination tuaj yeem tshwm sim los ntawm ntau yam, suav nrog cov teeb meem thaum lub sijhawm tsim khoom PCB, cov txheej txheem sib dhos tsis raug, thiab kev tuav tsis raug ntawm PCB.
Hauv tsab xov xwm no, peb lub hom phiaj yog kom nkag siab tob rau hauv cov laj thawj tom qab delamination ntawm rigid-flex boards thiab tshawb nrhiav cov tswv yim zoo los tiv thaiv qhov teeb meem no. Los ntawm kev nkag siab txog cov hauv paus hauv paus thiab ua cov kev tiv thaiv tsim nyog, cov tuam txhab tsim khoom thiab cov neeg siv tuaj yeem txhim kho PCB kev ua tau zoo thiab txo qhov kev pheej hmoo ntawm delamination. Tsis tas li ntawd, peb yuav tham txog kev txo cov tswv yim los daws cov teeb meem delamination (yog tias nws tshwm sim) thiab xyuas kom PCB txuas ntxiv ua haujlwm tau zoo. Nrog rau txoj kev paub thiab kev mus kom ze, delamination tuaj yeem txo qis, ua rau kev ua haujlwm thiab kev ua neej nyobrigid-flex PCBs.
1. Nkag siab cov laj thawj rau stratification:
Delamination tuaj yeem raug ntaus nqi rau ntau yam, nrog rau kev xaiv cov khoom, txheej txheem tsim khoom, ib puag ncig
tej yam kev mob, thiab mechanical stress. Kev txheeb xyuas thiab nkag siab cov laj thawj no yog qhov tseem ceeb rau kev coj ua kom tsim nyog
kev tiv thaiv. Qee qhov ua rau delamination hauv cov rigid-flex boards suav nrog:
Kev kho deg tsis txaus yog ib qho laj thawj tseem ceeb rau kev delamination ntawm rigid-flex boards. Kev tu tsis zoo thiab kev tshem tawm cov kab mob tsis zoo tuaj yeem tiv thaiv kev sib raug zoo ntawm cov khaubncaws sab nraud povtseg, ua rau muaj kev sib khi tsis muaj zog thiab muaj peev xwm sib cais. Yog li ntawd, kev npaj txhij txhua, nrog rau kev tu thiab tshem tawm cov kab mob, yog ib qho tseem ceeb los xyuas kom meej kev sib raug zoo thiab tiv thaiv delamination.
Kev xaiv cov khoom tsis raug yog lwm qhov tseem ceeb uas ua rau delamination. Xaiv cov khoom siv tsis sib xws lossis cov khoom tsis zoo yuav ua rau muaj qhov sib txawv ntawm thermal expansion coefficients ntawm cov khaubncaws sab nraud povtseg thiab cov khoom siv tsis txaus. Cov khoom sib txawv no ua rau muaj kev ntxhov siab thiab kev nyuaj siab thaum lub sij hawm thermal cycling, ua rau cov khaubncaws sab nraud povtseg. Ua tib zoo saib xyuas cov ntaub ntawv thiab lawv cov khoom thaum lub sij hawm tsim qauv yog qhov tseem ceeb rau kev txo qis qhov kev pheej hmoo ntawm delamination.
Tsis tas li ntawd, kev kho tsis txaus lossis kev sib koom ua ke thaum tsim khoom tuaj yeem ua rau delamination. Qhov no tuaj yeem tshwm sim thaum cov nplaum siv hauv txheej txheem lamination tsis kho txaus lossis siv cov txheej txheem sib khi tsis raug. Kev kho tsis tiav lossis tsis muaj zog interlayer adhesion tuaj yeem ua rau kev sib txuas tsis ruaj khov, uas tuaj yeem ua rau delamination. Yog li ntawd, kev tswj xyuas qhov kub thiab txias, siab thiab lub sij hawm thaum lub sij hawm lamination yog ib qho tseem ceeb kom ntseeg tau tias muaj zog thiab ruaj khov daim ntawv cog lus.
Kev hloov pauv kub thiab av noo thaum tsim khoom, sib dhos, thiab kev ua haujlwm kuj tseem tuaj yeem ua qhov tseem ceeb rau kev delamination. Kev hloov pauv loj hauv qhov kub thiab av noo tuaj yeem ua rau PCB thermally nthuav dav lossis nqus dej noo, uas ua rau muaj kev ntxhov siab thiab tuaj yeem ua rau delamination. Yuav kom txo tau qhov no, ib puag ncig tej yam kev mob yuav tsum tau tswj thiab optimized kom txo tau qhov kub thiab humidity hloov.
Thaum kawg, txhua yam kev ntxhov siab thaum tuav lossis sib dhos tuaj yeem ua rau tsis muaj zog ntawm cov txheej txheem thiab ua rau delamination. Kev tuav tsis raug, khoov, lossis dhau qhov kev txwv ntawm PCB tuaj yeem ua rau PCB rau cov neeg kho tshuab kev ntxhov siab uas ntau tshaj qhov sib npaug ntawm cov nyiaj sib txuas. Txhawm rau tiv thaiv kev delamination, cov txheej txheem tuav kom zoo yuav tsum ua raws thiab PCB yuav tsum tsis txhob raug khoov ntau dhau los yog kev ntxhov siab dhau ntawm nws qhov kev txwv.
kev nkag siab txog cov laj thawj ntawm kev delamination lossis delamination ntawm rigid-flex boards yog qhov tseem ceeb rau kev siv cov kev tiv thaiv kom raug. Kev npaj deg tsis txaus, xaiv cov khoom siv tsis zoo, kev kho tsis txaus lossis kev sib txuas, kev hloov pauv kub thiab av noo, thiab kev ntxhov siab thaum tuav lossis sib dhos yog qee yam ua rau delamination. Los ntawm kev hais txog cov laj thawj no thiab siv cov txheej txheem tsim nyog thaum lub sijhawm tsim khoom, sib dhos thiab tuav, qhov kev pheej hmoo ntawm delamination tuaj yeem txo qis, yog li txhim kho kev ua tau zoo thiab kev ntseeg siab ntawm rigid-flex PCBs.
2.Txoj kev tiv thaiv txheej txheem:
Kev tiv thaiv delamination ntawm rigid-flex boards yuav tsum tau ib tug multifaceted mus kom ze, nrog rau kev xav txog kev tsim, khoom siv
xaiv,cov txheej txheem tsim khoom, thiab tuav kom raug. Qee yam kev tiv thaiv zoo suav nrog
Kev txiav txim siab tsim qauv ua lub luag haujlwm tseem ceeb hauv kev tiv thaiv delamination. Ib qho kev tsim qauv PCB zoo txo qis kev ntxhov siab ntawm thaj chaw rhiab thiab txhawb kev khoov radii, txo qhov muaj peev xwm ntawm delamination. Nws yog ib qho tseem ceeb uas yuav tau xav txog qhov kev ntxhov siab ntawm cov neeg kho tshuab thiab thermal stresses PCB tej zaum yuav tshwm sim thaum nws lub neej. Siv staggered los yog staggered vias ntawm cov khaubncaws sab nraud povtseg tuaj yeem muab kev ruaj ntseg ntxiv thiab txo cov ntsiab lus kev ntxhov siab. Cov txheej txheem no faib kev ntxhov siab ntau sib npaug thoob plaws PCB, txo qhov kev pheej hmoo ntawm delamination. Tsis tas li ntawd, siv cov dav hlau tooj liab hauv kev tsim qauv tuaj yeem pab txhim kho adhesion thiab tshav kub dissipation, zoo txo lub sij hawm ntawm delamination.
Kev xaiv cov khoom siv yog lwm qhov tseem ceeb hauv kev tiv thaiv delamination. Nws yog ib qho tseem ceeb uas yuav tau xaiv cov khoom uas zoo sib xws coefficients ntawm thermal expansion (CTE) rau cov tub ntxhais thiab flex txheej. Cov ntaub ntawv nrog CTEs tsis sib haum tuaj yeem muaj kev ntxhov siab loj thaum hloov pauv kub, ua rau delamination. Yog li ntawd, xaiv cov ntaub ntawv uas qhia tau hais tias compatibility nyob rau hauv cov nqe lus ntawm thermal expansion cov yam ntxwv yuav pab txo kom txhob muaj kev ntxhov siab thiab txo qhov kev pheej hmoo ntawm delamination. Tsis tas li ntawd, xaiv cov nplaum nplaum zoo thiab cov laminates tsim tshwj xeeb rau cov rooj sib dhos nruj-flex ua kom muaj kev ruaj khov thiab ruaj khov uas tiv thaiv delamination dhau sijhawm.
Cov txheej txheem tsim khoom ua lub luag haujlwm tseem ceeb hauv kev tiv thaiv delamination. Kev tuav tswj qhov kub thiab txias siab thaum lub sij hawm lamination yog qhov tseem ceeb rau kev ua kom muaj kev sib raug zoo ntawm cov khaubncaws sab nraud povtseg. Kev sib txawv ntawm lub sijhawm kho thiab cov xwm txheej tau pom zoo tuaj yeem cuam tshuam PCB daim ntawv cog lus lub zog thiab kev ncaj ncees, ua rau muaj feem cuam tshuam ntawm delamination. Yog li ntawd, kev ua raws li cov txheej txheem kho kom zoo yog qhov tseem ceeb. Manufacturing automation pab txhim kho qhov sib xws thiab txo qhov kev pheej hmoo ntawm tib neeg kev ua yuam kev, kom ntseeg tau tias cov txheej txheem lamination tau ua tiav.
Kev tswj ib puag ncig yog lwm qhov tseem ceeb hauv kev tiv thaiv delamination. Tsim kom muaj kev tswj hwm ib puag ncig thaum lub sij hawm nruj-flex manufacturing, cia thiab tuav tuaj yeem txo qhov kub thiab av noo hloov pauv uas tuaj yeem ua rau delamination. PCBs yog rhiab heev rau ib puag ncig tej yam kev mob, thiab kev hloov pauv ntawm qhov kub thiab av noo ua rau muaj kev ntxhov siab thiab kev nyuaj siab uas tuaj yeem ua rau delamination. Kev tuav tswj thiab ruaj khov ib puag ncig thaum lub sij hawm PCB ntau lawm thiab cia yuav txo tau qhov kev pheej hmoo ntawm delamination. Kev khaws cia kom zoo, xws li kev tswj qhov kub thiab av noo, kuj tseem ceeb heev rau kev tswj xyuas kev ncaj ncees ntawm PCB.
Kev tuav kom raug thiab tswj kev ntxhov siab yog qhov tseem ceeb los tiv thaiv delamination. Cov neeg ua haujlwm koom nrog hauv PCB tuav yuav tsum tau txais kev cob qhia kom raug thiab ua raws li cov txheej txheem tsim nyog kom txo qis kev pheej hmoo ntawm delamination vim kev ntxhov siab ntawm cov tshuab. Tsis txhob khoov ntau dhau los yog khoov thaum sib dhos, teeb tsa lossis kho. Mechanical kev nyuaj siab dhau qhov txwv ntawm PCB tsim tuaj yeem ua rau tsis muaj zog ntawm kev sib raug zoo ntawm cov khaubncaws sab nraud povtseg, ua rau delamination. Kev ua raws li kev tiv thaiv kev tiv thaiv, xws li siv cov hnab los tiv thaiv zoo li qub lossis cov pallets padded thaum khaws cia thiab thauj, tuaj yeem txo qhov kev pheej hmoo ntawm kev puas tsuaj thiab delamination.
Tiv thaiv kom tsis txhob delamination ntawm rigid-flex boards yuav tsum muaj kev qhia dav dav uas suav nrog kev xav txog kev tsim, kev xaiv cov khoom, kev tsim khoom, thiab kev tuav kom zoo. Kev tsim qauv PCB kom txo qis kev ntxhov siab, xaiv cov khoom siv sib xws nrog CTEs zoo sib xws, tswj xyuas qhov kub thiab txias tswj thaum lub sijhawm tsim khoom, tsim kom muaj kev tswj hwm ib puag ncig, thiab siv cov txheej txheem tswj kom zoo thiab tswj kev ntxhov siab yog txhua yam kev tiv thaiv zoo. Los ntawm kev siv cov tswv yim no, qhov kev pheej hmoo ntawm delamination tuaj yeem txo qis, ua kom muaj kev ntseeg siab thiab ua haujlwm ntev ntawm PCBs nruj-flex.
3.Layered Mitigation Strategy:
Txawm hais tias muaj kev tiv thaiv ua ntej, PCBs qee zaum muaj kev delamination. Txawm li cas los xij, muaj ntau lub tswv yim txo qis
uas tuaj yeem siv los daws qhov teeb meem thiab txo nws qhov cuam tshuam. Cov tswv yim no suav nrog kev txheeb xyuas thiab tshuaj xyuas,
delamination kho cov txheej txheem, tsim kev hloov kho, thiab kev koom tes nrog PCB manufacturers.
Kev txheeb xyuas thiab tshuaj xyuas ua lub luag haujlwm tseem ceeb hauv kev txo qis delamination. Kev tshuaj xyuas tsis tu ncua thiab kev ntsuam xyuas tuaj yeem pab txheeb xyuas qhov delamination ntxov kom thiaj li ua tau raws sijhawm. Cov kev kuaj tsis zoo xws li x-ray lossis thermography tuaj yeem muab cov ncauj lus kom ntxaws ntawm cov cheeb tsam ntawm qhov muaj peev xwm delamination, ua kom yooj yim kho cov teeb meem ua ntej lawv dhau los ua teeb meem. Los ntawm kev txheeb xyuas qhov delamination ntxov, cov kauj ruam tuaj yeem ua los tiv thaiv kev puas tsuaj ntxiv thiab ua kom muaj kev ncaj ncees PCB.
Nyob ntawm qhov degree ntawm delamination, kev kho delamination tuaj yeem siv tau. Cov tswv yim no yog tsim los txhawb cov cheeb tsam uas tsis muaj zog thiab rov ua dua PCB kev ncaj ncees. Kev xaiv rov ua haujlwm yuav tsum ua tib zoo tshem tawm thiab hloov cov khoom puas ntawm PCB kom tshem tawm cov delamination. Adhesive txhaj yog lwm cov txheej txheem uas cov nplaum tshwj xeeb raug txhaj rau hauv qhov chaw delaminated los txhim kho kev sib raug zoo thiab rov ua kom muaj kev ncaj ncees. Nto soldering kuj tseem siv tau los txuas rov qab delaminations, yog li ntxiv dag zog rau PCB. Cov txheej txheem kho no muaj txiaj ntsig zoo hauv kev hais daws delamination thiab tiv thaiv kev puas tsuaj ntxiv.
Yog tias delamination dhau los ua qhov teeb meem rov tshwm sim, kev tsim kho tuaj yeem tsim los daws qhov teeb meem. Hloov kho tus qauv PCB yog ib txoj hauv kev zoo los tiv thaiv delamination los ntawm qhov tshwm sim thawj zaug. Qhov no tuaj yeem hloov kho cov txheej txheem los ntawm kev siv cov ntaub ntawv sib txawv lossis cov khoom sib xyaw, kho cov txheej thicknesses kom txo tau qhov kev ntxhov siab thiab kev nyuaj siab, los yog siv cov khoom siv ntxiv rau hauv cov chaw tseem ceeb uas ua rau delamination. Kev hloov kho kev tsim qauv yuav tsum tau ua nrog kev sib koom tes nrog cov kws tshaj lij kom ntseeg tau tias qhov kev daws teeb meem zoo tshaj plaws los tiv thaiv delamination.
Kev koom tes nrog PCB cov chaw tsim khoom yog qhov tseem ceeb los txo qis delamination. Tsim kom muaj kev sib txuas lus qhib thiab sib qhia cov ntsiab lus ntawm cov ntawv thov tshwj xeeb, ib puag ncig thiab kev ua tau zoo tuaj yeem pab cov tuam txhab tsim kho lawv cov txheej txheem thiab cov ntaub ntawv kom haum. Ua haujlwm nrog cov tuam txhab lag luam uas muaj kev paub tob thiab kev txawj ntse hauv PCB ntau lawm, cov teeb meem delamination tuaj yeem daws tau zoo. Lawv tuaj yeem muab kev nkag siab zoo, qhia txog kev hloov kho, pom zoo cov ntaub ntawv tsim nyog, thiab siv cov txheej txheem tsim tshwj xeeb los tiv thaiv delamination.
Cov tswv yim txo kev delamination tuaj yeem pab daws teeb meem delamination hauv PCBs. Kev txheeb xyuas thiab tshuaj xyuas los ntawm kev sim tsis tu ncua thiab tsis muaj kev puas tsuaj yog qhov tseem ceeb rau kev tshawb pom ntxov. Cov txheej txheem kho delamination xws li kev xaiv rov ua dua tshiab, kev txhaj tshuaj nplaum, thiab cov nplaum saum npoo tuaj yeem siv los ntxiv dag zog rau thaj chaw tsis muaj zog thiab rov ua dua PCB kev ncaj ncees. Kev hloov kho kev tsim qauv kuj tuaj yeem ua nrog kev koom tes nrog cov kws tshaj lij los tiv thaiv kev delamination los ntawm qhov tshwm sim. Thaum kawg, ua haujlwm nrog PCB cov chaw tsim khoom tuaj yeem muab cov tswv yim muaj txiaj ntsig thiab txhim kho cov txheej txheem thiab cov khoom siv los daws cov teeb meem delamination zoo. Los ntawm kev siv cov tswv yim no, cov teebmeem ntawm delamination tuaj yeem txo qis, ua kom muaj kev ntseeg siab thiab ua haujlwm ntawm PCB.
Delamination ntawm rigid-flex boards tuaj yeem muaj qhov tshwm sim loj rau kev ua haujlwm thiab kev ntseeg siab ntawm cov khoom siv hluav taws xob. Kev nkag siab txog qhov laj thawj thiab kev siv cov txheej txheem tiv thaiv zoo yog qhov tseem ceeb rau kev tswj xyuas PCB kev ncaj ncees.Cov yam ntxwv xws li kev xaiv cov khoom siv, kev tsim khoom, kev tswj hwm ib puag ncig thiab kev tuav tau zoo txhua tus ua lub luag haujlwm tseem ceeb hauv kev txo cov kev pheej hmoo cuam tshuam nrog delamination. Qhov kev pheej hmoo ntawm delamination tuaj yeem txo qis los ntawm kev xav txog cov txheej txheem tsim, xaiv cov khoom tsim nyog, thiab siv cov txheej txheem tsim khoom. Tsis tas li ntawd, kev tshuaj xyuas zoo, kev kho kom raws sijhawm, thiab kev sib koom tes nrog cov kws tshaj lij tuaj yeem pab daws cov teeb meem delamination thiab ua kom ntseeg tau tias kev ua haujlwm ruaj khov-flex PCBs hauv ntau yam kev siv hluav taws xob.
Post lub sij hawm: Aug-31-2023
Rov qab
