Cov txheej txheem tseem ceeb ntawm kev hloov pauv OLED vaj huam sib luag
1. ITO substrate pretreatment
ITO yog siv los ua cov anode, thiab cov yeeb yaj kiab feem ntau yog tsim nyob rau hauv cov txheej txheem ntawm kev ua TFT backplane. Lub tiaj tus thiab huv ntawm lub substrate nto yuav cuam tshuam rau kev loj hlob ntawm cov organic nyias-zaj duab xis cov ntaub ntawv thiab kev ua tau zoo ntawm OLED, yog li ITO nto yuav tsum tau nruj me ntsis ntxuav.
2. EL zaj duab xis tsim
Tom qab pretreatment ntawm ITO substrate, OLED cov ntaub ntawv npaj muaj xws li me me organic molecules, siab molecular polymers, hlau thiab alloys. Feem ntau cov organic me me molecule films yog npaj los ntawm lub tshuab nqus tsev thermal evaporation. Soluble organic me me molecules thiab cov yeeb yaj kiab polymer tuaj yeem npaj los ntawm cov txheej txheem yooj yim dua, sai dua thiab siv cov nqi qis. Spin txheej, inkjet luam ntawv, thiab laser tau tsim ua tiav. Technology xws li hloov luam ntawv. Hlau thiab alloy films feem ntau yog npaj los ntawm lub tshuab nqus tsev thermal evaporation. Cov hauv qab no tsom mus rau ob txheej txheem ntawm lub tshuab nqus tsev thermal evaporation thiab inkjet luam ntawv.
(1) Lub tshuab nqus tsev thermal evaporation: yog hais txog evaporation ntawm cov khoom vaporized rau hauv atom lossis molecules los ntawm kev siv hluav taws xob tam sim no cua sov, hluav taws xob beam bombardment thiab laser cua sov hauv lub tshuab nqus tsev. Qhov saum npoo ntawm daim ntawv yog condensed los ua ib zaj duab xis nyias. Qhov chaw tshwj xeeb ntawm vapor deposition zaj duab xis yog tswj los ntawm Fine Metal Mask (FMM, uas yog, lub ntsej muag zoo nkauj hlau).
Cov txheej txheem evaporation muaj qhov yuav tsum tau nruj me ntsis ntawm lub tshuab nqus tsev, lub thickness ntawm zaj duab xis, FMM kev sib raug zoo, thiab kev tswj impurity thaum thauj khoom. Tam sim no, cov txheej txheem vapor deposition muaj cov cuab yeej siv siab tshaj plaws thiab thev naus laus zis kom loj hlob ntawm ntau yam EL zaj duab xis txoj hauv kev, thiab nws tuaj yeem siv los npaj cov txheej txheem txhaj tshuaj, thauj cov khaubncaws sab nraud povtseg, lub teeb-emitting txheej thiab cov ntaub ntawv cathode. Nws qhov tsis zoo yog qhov kev ua yeeb yaj kiab qeeb qeeb, tsis siv cov khoom siv organic, thiab tsis zoo ib yam ntawm cov yeeb yaj kiab loj loj. Yog li, cov txheej txheem evaporation feem ntau yog siv rau kev npaj cov khoom siv me me thiab nruab nrab OLED.
(2) Inkjet luam ntawv: hais txog ua ntej sau ntau yam khoom siv hauv cov txheej txheem ua haujlwm rau hauv number case cartridges, siv lub khoos phis tawj los hloov cov ntaub ntawv duab rau hauv cov teeb liab digital, thiab tswj kev txav ntawm nozzles thiab extrusion ntawm number case droplets. Txau mus rau qhov chaw sib xws los tsim cov qauv uas yuav tsum tau ua, kom ua tiav qhov tseeb, ntau thiab qhov chaw tso nyiaj, thiab ua kom tiav cov khoom luam tawm kawg. Inkjet luam ntawv tuaj yeem siv los npaj lub qhov thauj cov khaubncaws sab nraud povtseg, lub teeb-emitting txheej, thiab cov ntaub ntawv cathode. Lwm cov txheej txheem tseem yuav tsum tau ua kom tiav nrog kev pab los ntawm cov txheej txheem evaporation. Tag nrho-txheej inkjet luam ntawv thev naus laus zis tab tom txhim kho. Piv nrog rau evaporation, cov txheej txheem luam ntawv inkjet yog qhov yooj yim, txhim kho cov khoom siv tau zoo, thiab tsim nyog rau kev npaj cov khoom siv loj OLED. Nyob rau hauv lub neej yav tom ntej, nrog rau kev loj hlob thiab loj-scale daim ntawv thov ntawm cov tshuab luam ntawv, kev tsim cov nqi ntawm OLED tuaj yeem txo qis heev.
Ntawm cov technologies ntawm inkjet luam ntawv, txoj kev loj hlob ntawm high molecular polymer number case yog qhov tseem ceeb tshaj plaws, vim hais tias cov uniformity ntawm ejected droplets mas nyob ntawm lub cev khoom ntawm tus number case. Tam sim no, vim tsis muaj kev ruaj ntseg ntawm tus number case formulation thiab luam ntawv txheej txheem, nws yog ib qho yooj yim ua rau tsis zoo EL kev ua tau zoo, uniformity thiab kev ntseeg tau. Qhov no yog ib qho teeb meem kev lag luam uas inkjet luam ntawv yuav tsum tau daws sai.
3. Ntim txheej txheem
Txhawm rau tiv thaiv dej, oxygen thiab plua plav nkag mus rau sab hauv ntawm OLED cov khoom siv thiab ua rau nws lub neej thiab kev ua haujlwm poob qis, nws yog qhov tsim nyog los tsim cov txheej txheem ntim OLED. Tam sim no, cov txheej txheem ntim khoom siv yog iav lossis hlau npog ntim, thiab ntim cov zaj duab xis nyias.
(1) Ib txwm npog npog encapsulation: Nyob rau hauv ib puag ncig uas muaj cov roj inert, OLED iav yog khi rau lub iav npog los yog hlau npog nrog ultraviolet curing kua nplaum, yog li sandwiching cov organic txheej thiab npog ntawm lub hau thiab substrate. Cov electrode yog kaw kom cais cov dej, oxygen thiab plua plav tawm ntawm sab nraud. Qhov tsis zoo ntawm lub hau npog yog tias cov hlau npog yog yooj yim rau warp thiab deform, thaum lub khob npog tsis yooj yim thiab tsis haum rau kev txhim kho OLED thev naus laus zis.
(2) Ntim zaj duab xis nyias: hloov lub npog phaj ntim los ntawm kev tso cov yeeb yaj kiab tiv thaiv txheej txheej ntawm qee qhov tuab yog cov txheej txheem ntim OLED tam sim no. Nyias-film ntim muaj xws li inorganic nyias-zaj duab xis ntim, organic nyias-film ntim, thiab cov ntim ntim nrog sib tshooj organic / inorganic txheej. Cov ntim zaj duab xis nyias feem ntau yog nyob ntawm PECVD (Ion Enhanced Chemical Vapor Deposition, uas yog, siv microwave lossis xov tooj cua zaus los ionize cov roj uas muaj cov khoom siv atoms los tsim cov ntshav hauv zos. xav tau nyias zaj duab xis yog deposited), tab sis nrog nce ntawm saj zawg zog OLEDs thiab cov yuav tsum tau rau lightness thiab thinness, lub thickness ntawm lub encapsulation txheej kuj yuav tsum tau nyias thiab nyias. Ua tiav qhov ceev ceev hauv qhov tuab me me, yog li kom tau txais cov dej zoo thiab cov pa oxygen cov khoom siv, uas yuav tsum tau cov txheej txheem siab thev naus laus zis. Tam sim no, kev lag luam tab tom tshuaj xyuas kev siv ALD (Atomic Layer Deposition, ib txoj hauv kev uas tuaj yeem tso cov tshuaj nyob rau saum npoo ntawm txheej substrate los ntawm txheej hauv daim ntawv ntawm cov yeeb yaj kiab monoatomic, zoo ib yam li cov tshuaj lom neeg tso tawm) kom ua tiav cov teebmeem saum toj no. .
