Nyob rau hauv BOM (Bill of Materials) tus nqi qauv ntawm cov ntxaij vab tshaus coj mus muag, hloov tau yooj yim luam tawm Circuit Court boards (FPCAs) yuav zoo li suav tias tsuas yog ib feem me me xwb, tab sis lawv yeej yog "tus tsav tsheb tsis pom" ntawm tus nqi hloov pauv.
Kev xaiv ntawm ib qho txuas lossis qhov sib txawv ntawm cov txheej txheem tsim khoom ntawm qhov chaw khoov tuaj yeem ua rau muaj kev hloov pauv ntawm cov nqi tsev. Rau LCD zaub module tuam ntxhab nrog cov khoom xa tuaj loj, cov txiaj ntsig zoo no tsis tuaj yeem kwv yees.
Raws li cov ntaub ntawv cov kab ntau lawm thiab cov lus tawm tswv yim, peb tau txheeb xyuas xya lub ntsiab lus tseem ceeb hauv FPCA tsim. Cov ntsiab lus no feem ntau raug saib tsis pom thaum lub sijhawm R&D tab sis tuaj yeem ua tau txiaj ntsig - noj khoom noj thaum lub sijhawm tsim khoom loj.
FPCA Flexible Circuit Board Loj thiab kam rau ua
Qhov loj ntawm FPCA ncaj qha cuam tshuam rau kev ua haujlwm ntawm pawg thawj coj saib. Nrog tib cov khoom siv raw cov ntsiab lus, qhov loj dua txhais tau tias tsawg dua cov laug cam tuaj yeem tso tawm, yog li nce tus nqi ib chav.
Piv txwv li, yog tias koj tus qauv tsim tso cai rau kev hloov kho me ntsis, txo qhov loj tuaj yeem txhim kho kev siv cov khoom siv.
Hais txog qhov kam rau ua, qhov loj me yog feem ntau tswj tsis pub dhau ± 0.05mm txog ± 0.15mm.
Ua kom tiav qhov siab tshaj plaws, xws li ± 0.05mm, yuav tsum siv qeeb -ceev xaim EDM machining rau pwm, uas ua rau cov nqi pwm nce ntxiv.
Hloov pauv, kev kam rau siab ntawm ± 0.1mm tsuas yog xav tau nruab nrab -ceev xaim EDM machining, uas ua rau muaj nqi ntau dua - kev daws teeb meem.
FPCA Flexible Circuit Board Connection Hom rau Mainboard
Txoj kev sib txuas ntawm FPCA lub rooj tsav xwm hloov tau yooj yim thiab cov khoom lag luam tseem ceeb yog lwm tus nqi sib txawv rau FPCA hloov tau yooj yim.
Tam sim no, TFT-LCD modules feem ntau siv snap-hauv lossis ntsaws- hauv kev sib txuas, thaum cov kev sib txuas ntawm cov khoom siv tsis tshua muaj vim lawv qhov ua tau zoo thiab tsis zoo.
Los ntawm qhov kev xav ntawm cov nqi vaj huam sib luag FPCA ntshiab, snap- hauv kev sib txuas yog qhov kim tshaj plaws, ua raws li ntsaws- hauv kev sib txuas, thiab kev sib txuas soldered yog qhov pheej yig tshaj.
Vim li cas snap- hauv kev sib txuas kim dua? Lawv koom nrog ntau precision Cheebtsam thiab cov kauj ruam los ua ke. Yog tias koj daim ntawv thov tso cai, hloov mus rau lub ntsaws - hauv kev sib txuas tuaj yeem txuag tau nqi ntau.
Peb tau pom nyob rau hauv ntau lawm tias, tshwj tsis yog tias muaj qhov tshwj xeeb yuav tsum tau ua kom ntev, lub ntsaws - hauv kev sib txuas yog tus nqi ntau tshaj - kev xaiv zoo, txo cov nqi tag nrho yam tsis muaj kev ntseeg siab.
FPCA Bending Area thiab Cheeb Tsam Cheeb Tsam Cov Txheej Txheem
Cov txheej txheem npog rau thaj tsam dabtsi yog khoov thiab cheeb tsam (cov khoom siv hauv cheeb tsam thiab thaj chaw txuas) ntawm FPCA feem ntau suav nrog: txheej txheem zaj duab xis thiab cov txheej txheem thermosetting ntsuab xim rau FPCA dabtsi yog khoov cheeb tsam, thiab npog zaj duab xis qhov rai qhib txheej txheem thiab cov txheej txheem photosensitive ink rau thaj tsam FPCA.
① FPCA Bending Area:
Nrog rau txoj kab nqaim zuj zus thiab nyias nyias LCD vaj huam sib luag ntawm TFT tam sim no-LCD zaub modules, cov kev xav tau rau qhov kev ntxhov siab rov qab nyob rau hauv FPCA bending cheeb tsam tau dhau los ua nruj dua.
Qhov kev ntxhov siab rov qab nyob rau hauv FPCA bending cheeb tsam yog siab dua thaum siv cov txheej txheem npog zaj duab xis piv rau cov txheej txheem thermosetting ntsuab number case, uas ua rau muaj kev pheej hmoo ntawm hotspots ntawm BLU (Backlight Unit) teeb interface.
Tus nqi ntawm kev siv cov txheej txheem thermosetting ntsuab number case nyob rau hauv FPCA dabtsi yog khoov cheeb tsam yog siab dua li ntawm cov txheej txheem npog zaj duab xis, raws li nws muaj xws li ib tug ntxiv screen printing thiab thermosetting ntsuab number case txheej txheem.
Feem ntau, txiav txim siab tus nqi, yog tias cov duab module muaj qhov dav bezel thiab cov neeg siv khoom tsis muaj qhov tshwj xeeb, cov txheej txheem npog zaj duab xis tuaj yeem ua qhov tseem ceeb.
② FPCA Cheeb Tsam:
FPCA tivthaiv cheeb tsam tuaj yeem muab faib ua thaj chaw tiv thaiv thiab thaj chaw txuas. Cov txheej txheem npog tseem ceeb rau thaj chaw tiv thaiv yog tam sim no cov txheej txheem photosensitive number case npog.
Qhov no feem ntau yog vim hais tias cov khoom me me xws li 0201 thiab 01005 tau siv, thiab qhov tseeb ntawm cov ntaub thaiv npog tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua, thiab tsis tuaj yeem ua qhov tseeb ntawm SMT qhov chaw.
Cov txheej txheem npog rau thaj chaw txuas tuaj yeem xaiv tau yooj yim raws li qhov kev xav tau tshwj xeeb. Txawm li cas los xij, thaum siv cov txheej txheem npog zaj duab xis qhib, nws yuav tsum ua tib zoo xyuas seb qhov ntev ntawm qhov sib txuas ntawm thaj chaw, xws li cov ntaub thaiv npog qhov qhib qhov sib nrug, npog zaj duab xis qhib PAD dav, thiab cov ntaub npog zaj duab xis npog PAD dav, ua tau raws li cov txheej txheem muaj peev xwm ntawm txhua lub chaw tsim khoom FPCA.
Feem ntau, tus nqi ntawm kev siv lub npog zaj duab xis qhib txheej txheem yog qhov zoo dua piv rau cov txheej txheem photosensitive number case npog.
Yog tias qhov tsim ntawm FPCA connector cheeb tsam ua tau raws li cov txheej txheem muaj peev xwm ntawm FPCA cov chaw tsim khoom, cov txheej txheem qhib zaj duab xis npog tuaj yeem ua ntej.
FPCA Steel Reinforcement Grounding Requirements
Feem ntau muaj ob hom kev cai hauv av rau FPCA steel reinforcement: grounded thiab ungrounded. Txawm hais tias cov hlau reinforcement yog grounded thiab qhov loj ntawm cov av impedance yuav cuam tshuam tus nqi ntawm FPCA.
Yog hais tias lub steel reinforcement yuav tsum tau grounding, lub grounding impedance feem ntau yuav tsum tau tsawg tshaj li los yog sib npaug zos rau 5Ω; Yog hais tias lub steel reinforcement tsis grounded, tsis muaj kev tswj yuav tsum tau rau nws impedance.
Nyob rau tib lub sijhawm, qhov loj ntawm qhov impedance tom qab grounding steel reinforcement kuj tseem cuam tshuam tus nqi ntawm FPCA rau qee yam. Yog hais tias lub steel reinforcement grounding impedance yuav tsum tau me me (<2Ω), the steel sheet needs to be nickel-plated, and the exposed copper area and the number of exposed copper points where the FPCA and the steel sheet contact also need to be increased to ensure that the steel sheet grounding impedance meets the requirements.
Feem ntau, raws li kev txiav txim siab tus nqi, yog tias tus neeg siv khoom tsis muaj qhov yuav tsum tau hais txog seb lub steel reinforcement yog grounded, nws yog qhov tseem ceeb los tsim nws li ungrounded; Yog hais tias tus neeg siv yuav tsum tau cov steel reinforcement yuav tsum tau grounded tab sis tsis muaj qhov yuav tsum tau rau grounding impedance, nws raug nquahu kom tswj lub grounding impedance.<5Ω.
FPCA Component Dispensing Requirements
Txhawm rau tiv thaiv qhov tsis xws luag xws li cov ntaub qhwv ntsej muag xoob thiab tev tawm thaum lub sij hawm FPCA tivthaiv dabtsi yog khoov, uas tuaj yeem cuam tshuam rau kev ua haujlwm thiab kev siv ib txwm siv ntawm TFT-LCD kua siv lead ua zaub module, feem ntau yuav tsum tau muab faib rau hauv thaj chaw tiv thaiv los tiv thaiv cov khoom siv thiab txhim kho lawv lub zog.
FPCA kev faib tawm feem ntau tuaj yeem muab faib ua ob hom, tseem paub hauv kev lag luam xws li: tag nrho cov txheej txheem encapsulation thiab cov txheej txheem encapsulation ib nrab.
Tag nrho cov txheej txheem encapsulation npog tag nrho cov cheeb tsam, muab kev tiv thaiv zoo tab sis tus nqi siab dua; cov txheej txheem encapsulation ib nrab tsuas yog npog thaj tsam ntawm cov khoom siv solder pad, uas yog qhov ua tau zoo dua thiab tsis tshua muaj nqi, tshwj tsis yog tias kev xa tawm tsis tuaj yeem zam rau cov khoom me me.
Raws li peb cov kev paub dhau los nrog TFT-LCD modules, cov txheej txheem encapsulation ib nrab yog qhov kev xaiv tshwj tsis yog tus neeg siv khoom muaj kev ntseeg tau tshwj xeeb.
FPCA Exposed Copper Area thiab naj npawb
Lub vaj huam sib luag hloov tau FPCA siv tus qauv tsim tooj liab kom ua tiav hauv av los ntawm cov khoom siv hluav taws xob, txhim kho ESD tsis kam.
Txawm li cas los xij, txhua qhov chaw tooj liab raug rau ntawm txhua lub vaj huam sib luag hloov tau yuav tsum tau electroless nickel immersion kub (ENIG) nto kho. Raws li cheeb tsam thiab tus naj npawb ntawm thaj chaw tooj liab nthuav dav ntxiv, kev siv kub thiab npib tsib xee kuj nce ntxiv.
Peb cov lus pom zoo yog: thaum ua tau raws li cov qauv kev sim, txo qhov tsawg kawg nkaus ntawm thaj chaw thiab cov chaw tooj liab raug rau ntawm FPCA vaj huam sib luag. Qhov no yuav tsis tsuas yog tswj cov nqi FPCA nkaus xwb tab sis kuj ua kom yooj yim rau cov txheej txheem sib dhos ntawm TFT-LCD module.
FPCA EMI Electromagnetic Shielding Zaj duab xis tsim yuav tsum muaj
Txhawm rau txo qhov kev pheej hmoo ntawm kev cuam tshuam hauv xov tooj cua hauv txhua lub cuab yeej, EMI electromagnetic shielding zaj duab xis yog feem ntau ntxiv rau FPCA lub vaj huam sib luag hloov tau. Tus naj npawb ntawm cov khaubncaws sab nraud povtseg thiab thaj tsam ntawm electromagnetic shielding zaj duab xis ntawm FPCA ncaj qha cuam tshuam tus nqi ntawm FPCA.
Xav txog tus nqi, peb pom zoo kom tsis txhob ntxiv EMI electromagnetic shielding zaj duab xis thaum twg los tau. Yog tias tsim nyog ntxiv nws, ua qhov tseem ceeb ntawm ib qho - ib sab kev pab them nqi nrog thaj tsam tsawg tshaj plaws, vim tias ob npaug - ib sab kev pab them nqi kim dua ib qho - ib sab, thiab tag nrho cov kev pab them nqi kim tshaj qhov kev pab them nqi ib nrab.
Tsis tas li ntawd, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias qhov ntxiv electromagnetic shielding zaj duab xis yuav tsum yog ib qho txuas ntxiv. Qhov no yog kom tsis txhob segmented designs thiab cais daim ntawv thov txheej txheem, uas yuav ua rau kom cov kauj ruam ntawm daim ntawv thov thiab cov nqi.
Xaus
Cov qauv tsim ntawm FPCA hloov pauv vaj huam sib luag tau hais los saum toj no tsis muaj nyob hauv kev sib cais; lawv cuam tshuam ib leeg thiab cuam tshuam rau tag nrho cov nqi ntawm TFT-LCD zaub module.
Kev lag luam tsim nyog-offs thiab optimization tuaj yeem txo tus nqi tag nrho thaum tswj kev ua haujlwm.
