OLED, , , ĵ
OLED ڸ ݼ̳ Ѳ кϴ Դϴ. ݼ ĵ(can), (lid) ǥϱ . ݼ̳ (desiccant Ȥ getter) ϰ, к(sealant) ѷ OLED ǰ ϴ Ͽϴ. к Ͽ ݾ Ե ִ ҿ ӱݵ ϱ ؼ. ķ ߴϸ鼭 (glass frit, glass paste) ĵ ڸ θ ̿, κ , 簡 ¦ ¿ OLED ǰ ǾԽϴ. Ͽ , Ƿ ʿ䰡 .
, ۵ OLED кϴ 캸ڽϴ. OLED 迭 . , , ʿ ȭ ũ ڸ г ̰ Ʈ ϱ ũ ڸ Դϴ. ϸ 5ġ Ʈ ϴ , 5ġ ߶ г ϳ ǹմϴ. ʿϰ, Ŀٶ ¿ մϴ. ũ 4 ܰ . к к(seal line) , к(seal) , ǰ OLED , ̿ к ȭ Դϴ. , մϴ. , , . ̾ ϱ ؼ ö ʿմϴ. ϷǸ к ѷ մϴ. к μ(cell seal printing) մϴ. е ߿. , OLED к ϰ ؾ ϹǷ, β Ȯ ġ μⰡ Ǿ մϴ.
μⰡ ϷǸ . ŷκ к Ͽ մϴ. ó Դϴ. , ִ , δ ߰ ϰ к ϵ к Ư¡ ȭŰ ϴ . ſ δ к ֿ и ִ . ġ øƮ ξ ֵ, и ˰ Ư ġ Ƿ ̸ δ ʿմϴ. δ ü ̹Ƿ δ 쿩 ŵ Բ ʿ. ̵ к (paste) . ó ǿ ö ߰ν ġ鼭 ̳ ǥ Ͽ Ű Ų ǥ ϴ. ̻ ù ° ܰ к Դϴ. ܰ к ڸ к μմϴ. ̶ μǴ к ʹ ٸ Ϲ ڿܼ ȭ մϴ. ǰ OLED Ѿ. غ ǰ OLED ڰ Ʒ ̴ Դϴ. μ ִ ǵ ϳ . ڿܼ(UltraViolet, UV) ؾ к . к ܺ ħ , ϴ մϴ. ̿ к ȭԴϴ. , к ֻϸ鼭 Ͼ . ̷ ġ鼭 к OLED г ϼ˴ϴ. ܰ 뵵 ´ ũ ڸ ̾. ߷ ̵ϰ ˴ϴ.
OLED, , , ̺긮
̺긮 ⺻ OLED , ȣ ϰ, к ٸ (cover plate) ̿, ϴ Ư¡ մϴ. ְ, 쿡 ݼǵ , ַ öƽ ϰ .
̷ ̺긮 پѵ, ũԴ dam & fill İ ʸ ̳(film laminating) մϴ. Dam & fill ̸ ״ ȣ õ OLED װ ȿ ȭ (curable resin) ä , ǰ . ʸ ̳ ȣ õ ̴ Դϴ. ̴ Ư, ڸ · ϴ, Ȥ ʸ · Ͽ ϴ .
̺긮 ĵ ̿ OLED, TV OLED Ͽ , ǰ ȿ ǰ ֽϴ. Ư ٽ δ , , öƽ(transparent gas barrier), ݼ ȣ . , 鵵 پϰ ߵǾ Ͽ , ִ OLED Դϴ. ٸ, ־ (bezelless) äϱ غϿ ϸ, 踮 ʸ , ڸ Ŀ ؼ β β, ü ġϿ Ѵٴ Բ, öƽ ʸ ̺긮 ̷ (scribing) ǰ öƽ ʸ ٸ ʿ ִٴ Ͽ ڸ üǾ ɼ ϴ.
OLED, , ڸ
OLED ڸ ĵ ̳ ̺긮 İ ʿ ʽϴ.
, ر , ̾ Ͽ ڸ ϴ . , ο δ Ʈ Ÿ ª, ڸ OLED ߱ ϸ, β ּȭǸ, Ư öƽ ǿ 鿡 մϴ.
̷ ڸ ⺻ Ƽ , Ǵµ ҳ ִ Դϴ. ҿ (leakage) ũ Ȧ ϸ, ħ(permeation) ̷ ҿ п ص Ȯ ƾ . , 縦 Ͽ Ͽ մϴ. Ư, Ŀ Ȧ ⸷ ϱⰡ Ƿ, ̻ Ƽ Ȧ ϴ ġ ҳ ̵ θ ϴ մϴ.
ҵ ֽϴ. , ̾ 鰣 ϴ (stress)ȭ(relaxation)Ѽ ƴ(crack) ʵ . ǥ鿡 ö , 帧(reflow) Ư ̿Ͽ ǥ źȭ(planarization) Ѽ ļ ݴϴ. Ư, ũ ̿ , β 1ũ ̻ Ͽ ǥ ۿ , ʹ ϰ, ȿ ٴ ֽϴ. öƽ OLED Ӱ ϴ ҵ . ̷ ڸ Ǵ ȣϸ, ñδ ‘ – – ’ ߰ Ե 3 ȭ Դϴ. ϼϷ õ , ɰ 꼺 Ű ϰ ֽϴ.
, ũ ð Բ ȭ(flash evaporation) پ ǰ , ַ Ǵ , ö ȭ (Plasma Enhancement Chemical Vapor Deposition, PECVD), (Atomic Layer Deposition, ALD)Դϴ.
, ̰ PE-CVD CVD ߿ µ ڸ ִٴ . Ư ALD , ν ϰ Ǻ(step coverage) Ͽ ⸷ . ٸ, ð µ ٴ Ѱ谡 ־µ, Ͽ OLED ϵ ª ð, Ư¡ ϴ ALD ϰ ֽϴ.
OLED ڸ ҿ 10-5 ~ 10-6 ( cm3(STP)/m2-day g/m2-day) Ͽ ϴ Ͽ, 꼺, ÷ Ư 䱸˴ϴ. , µ 100 ϰ ̸̻, 250 nm/min ̻ ӵ, ο , 90% ̻ ñ , , ʿ .
̷ 䱸 ǵ , ĵ , OLED Ͽ ̾߱⸦ ̾ ϴ.
OLED, , ĵ
OLED ڸ ν ִ ÷ гη ڸű Ͽϴ. öƽ , 0.1mm β г . ÷̰ ִ ôԴϴ. , öƽ ÷̸ , 꼺 ݱ Ű ʽϴ. ϰ 꼺 η縶(Roll-to-Roll, R2R) ̸, ̵̹ (polyimide varnish) ƴ öƽ ̰, ÷ TFT, ȭ OLED, ڸ̳ ĸ ̻̰. ڸ Ѿ ǰ ñ , Ͽ ߵǰ ִ 캾ϴ.
κ OLED ڸ ȣϴµ ʿ ݼ ĵ 带 Ű ĵ/ Ͽ ݼ̳ öƽ Ʈ Ű ̺긮 , 踮(Multi-Layer Barrier, MLB) , Ȥ ⸷ Ͽ Խϴ. ɰ ǥ ϰ Ǹ 踮 ⸷ ʼ . 踮 ɰ Բ źȭ, Ʈ ȭ, ɵ ߿մϴ. ũ ϸ β 1 ũ ̻ ϰ Ǿ ڵ Ŀϴ ȿ . ⺻ , ɰ Բ , , , ɵ ̻ Ѿ ϸ, 翬 Ǿ . OLED 䱸ϴ ݰ ŷڼ ϵ ִ ǥȭ Ǿ մϴ.
ο Ű öƽ , , ϸ, ĸ Դϴ. , öƽ ǵ ΰ ҳ ħ ſ Ͽ ü Ͱ ʼ. , OLED ڱ, ᱹ г ü ġ ܿ Ե ־ մϴ. ٶ ߰ ٱ ʰ Ͽ Ұ 100 1 ٿ . , ⸷ ״ ֽϴٸ, Բ Ʈ ŸӰ , ̿ ĸ ߵǰ ֽϴ.
, ALD ַ Ͽ ǰ , ؿ OLED ϴ ֽϴ. ٸ, ߿ ϴ η ũ ʰ ð ߽õǸ, ־ ۾ Ϸ ϴ ۾ڷκ͵ ߰ ʿϰ. ̳ ȭ ؼ(Boron Nitride, BN) ǻ Ŀ ſ Ͽ , 迭 ϴ 鵵 ֽϴ. OLED 䱸Ǵ ̸, ߰ ϸ ǿȭ ɼ ˴ϴ. Ư OLED ٽ è ־ ڸ Ͽ߸ ϴ ذ ְ. ܿ, ö ̿ ALD , ̳, ڵ л Ű ̵, , ڸ ݻ縦 ̱ ؼ, ڿܼ LED ̿ ȭ ǰ ֽϴ.
OLED, ,
OLED Ŀ ɰ Ư Ͽ մϴ. , ҿ ߿ ǥ̰, ÷̿ Ȱϱ ؼ ñ , ȥŹ(haze) ߿մϴ. , ÷̸ Ͽ ̺긮 ڸ 쿡 ݰ ݺ ڿ Բ ʸ , ʿϸ, 꼺 ݿ ҵ ϴ.
߿ ҿ Դϴ. ̴ Ȥ (Oxygen or Water Vapor Transmission Ratio, OTR or WVTR) ǥõ. cm3(STP)/m2-day g/m2-day ǥǴµ, ڴ dz , и ð(day) شմϴ. , ð Ŀ dz Ÿ. Ǵ ǥ µ з(Standard Temperature and Pressure, STP) Դϴ. Ϲ ڿ ũⰡ Ƿ ڿ شϴ WVTR OTR 1/10 شѴٰ ϸ, WVTR ַ ϰ ˴ϴ.
OLED TV 䱸ϴ 5 ð ؼ WVTR 10-6g/m2-day ϰ Ǿ մϴ. OTR 10-5cm3(STP)/m2-day ϰ 䱸ǰ. Ϲ öƽ ʸ WVTR 101~100g/m2-day ̸, Ĺ ų 忡 ʿ öƽ , Ȥ ʸ 10-1~10-2g/m2-day ϴ. ڵ 䱸Ǵ WVTR µ, (Electro-Chromic Device, ECD) 10-2~10-3g /m2-day, ¾ (Organic Photo-Voltaics, OPV) 10-3~10-5g /m2-day 䱸. μ OLED 10-6 ٷο WVTR 䱸ϰ ֽϴ.
WVTR ǰ ǥغ. ౸ 50, 100(δ 64~75, 100~110) õ öƽ ʸ ä Ŀ Ʒ غڽϴ. õ öƽ ʸ ũ Ʈ Ѵ볪 巳 ŭ , Ĺ Ű¡ Ǵ 10-2g /m2-day Ƿ, Ʈ ߸ մϴ. ư OPV 䱸Ǵ 10-4g /m2-day ̷ Ǭ , OLED 䱸ϴ ̵ ϴ.
̷ WVTR 10-3g/m2-day Ĺ Ű¡ ʸ 뵵 õǾ, 10-3g/m2-day Դϴ. , ǥȭ ε ٴ Դϴ. ұϰ پ WVTR , ǥǾ Խϴ.
, Į Ʈ ֽϴ. Į ȭ Ǹ 鼭 . ̸ ̿Ͽ ȿ Į ڸ Ȥ Į ġϰ ܺηκ Ե Į ȭǴ ȭ . WVTR մϴ. ð Ȥ Ʈ ϴµ, ܺ 100%, µ 60 ̻ . 10-6g/m2-day ر WVTR , Į Ʈ ַ ̷Ƿ ŷڵ ʽϴ.
WVTR 3 ƮԴϴ. ״ 3 ҷ ̷ ڵ ̿ϴµ, Ͽ 3 ҿ Ǵ 缱 , ϴ . WVTR 10-7g/m2-day ر , 缱 ̹Ƿ ̿ ɸ ȯ Ǿ մϴ.
, Mocon WVTR Ʈ Ĺ Ű¡ ȭ ǰ õǾ ֽϴ. ֱٿ м ȭн Ͽ 10-5g/m2-day ϴٰ ˷ . ̷κ ܻ , ̻ ϱ մϴ. ܿ м̳ ̿ , (dark spot) ǵ ȵǰ ־ ο õǰ ִ Դϴ.
WVTR Ͽ ñ ν OLED ݻ糪 Ǿ մϴ. ּ 90% ̻ 䱸ϰ . ȥŹ(haze) Ǹ鼭 þ߸ ǹϸ ̴ 1% ϰ ʿմϴ.
ʸ ״ ʸ Ǿ ִ ε, ̴ (cross-hatch tape test)̳ ܾ鼭 ϴ (scrape adhesion test) ϸ, κ 100% Ǿ մϴ.
ݰ ݺ ڿ ݰ(Radius of Curvature, ROC) ٿ鼭 Ǵ ݺ Ͽ Ǵµ (foldable) Ϸ RoC 1 mm Ȥ ϱ մϴ.
, ȯ̳ 뵵 䱸 ٸ ⺻δ 150 µ 1 Ͽ ջ . ̷ ȮǾ 뵵 µ , ġ մϴ. ǰ ⺻ 꼺 ʿϰ . , Ʈ ŸӰ Ȯ强 , , ǰ м ʿ մϴ.
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