"OLED, , , ÷ ʹ"
Ϲ, OLED г ù ° ÷ Դϴ. ÷ OLED ڰ ö ̷. ÷ TFT δ , ⺻δ ʹ, İ ݺ ̷ϴ. , OLED LTPS-TFT, ߴ OLED ȭ TFT ַ ǰ . LTPS-TFT ÷ Ⱓ Ȯ Ǿ ֽϴ. ⺻δ Ǹ ϰ, ȭ ٰ Ǹ , ʹ , ̿ Ͽ LTPS-TFT ϼմϴ.
ȭ TFT , ǥؿ Ǿ ʽϴٸ پ Ͽ ȭǰ ֽϴ. Ư Ȱ(channel layer) ߽ Ŀ İ (Etch Stopper, ES) Ĺ Ȱ İ(Back Channel Etch, BCE), ڱ (Self-Align, SA) ĵ е.
ES , ҽ 巹 Ĺ Ȱ ջǴ İ (Etch Stop Layer, ESL) ݵü մϴ. ̴ ESL ũ ߰ǰ Ʈ ذ ҽ/巹 ذ ħ(overlap) ũٴ . BCE Ǹ TFT μ, Ȱ ϰ Ʈ ذ ҽ/巹 ذ ħ(overlap) RC ϸ, ũⰡ ֽϴ. ٸ, Ϻ ϰ ҽ 巹 ʹ Ĺ Ȱ Ǿ İ ú Ȯ, ջ ʿմϴ. ڱ LTPS-TFT ϳ µ ȭ, Ȱȭ ݵü ʿ ʴ´ٴ ٸϴ. ٸ, ҽ 巹 ݼ Ȯ Ǿ ʾ Ȱ ̷ .
OLED, , >>
TFT ÷ ġǰ, ITO ʹ OLED ڿ ϴ. Ǵ Ư ҿ ,ذ ̿ ȭ, Ŀų ذ (dark spot) , ˴ϴ. , Ե , ر ġ ¿ ҿ ⸦ ִ ȣ ǰ . ̷ ȣ ϴ ̶ ϸ, , , κб ̾ ŬͰ ζ(in-line) ¸ ϰ ֽϴ.
ϱ Ե ÷ ģ , , ߱, , , ݼ ̷ϴ. Ư, ߱ ÷ , ʷ, Ķ ߱ ̼ ݼ ũ(Fine Metal Mask, FMM) ȭҿ Ȧ Ͽ ˴ϴ. Ư FMM RGB ʹװ ÷ .
OLED ÷ ϴ ĵ پϰ ߵǾ, ǰ ǰ ְų, з˴ϴ. , ʷ, Ķ ȭҵ ϴ (RGB OLED), OLED RGB ÷ ġϴ (White OLED+Color Filter, WOLED+CF), û OLED ʷϿ ȯ ġϴ (Blue OLED+Color Conversion Layer, BOLED+CCL) е. ̵ ߿ RGB OLED , WOLED+CF TV ַ ǰ .
BOLED+CCL Ư ȯ Ͽ , ߴ TV ġ ̸ 2~3 ̳ 꿡 Դϴ.
̵ ߿ ʹ Ȱ ǰ ִ RGB OLEDμ, ȭǰ ϴ İ (photolithography) ƴ϶ ũ(shadow mask) Ҹ FMM , , ʷ, Ķ ȭҵ ʹϰ .
, κ ȭ ߱ ̾ ǿ ǵ ϴ ٸ ϴ ̵, ȭ ġŭ FMM ¿ ٸ Ͽ Դϴ.
FMM 뷫 50ũ β ݼ ε ǰ ǵ ϱ Ͽ ƮĪ Ų Ŀ ӿ ϴ ϴ.
FMM ַ ο ġϴ ڼ ̿Ͽ ǿ Ǹ, 糪 е, ȭ, ȭ ߰ ʿ о. , ̷лδ 4K ̻ ػ ؼ FMM β 15ũ ϰ Ǿ մϴ. δ ʹ, İ, , Ǹ, ʿ մϴ.
(electroforming), (laser machining) õǰ . , ITO ǿ (PhotoResist, PR) , ϴ ʹ -ö ħϿ ϴ βŭ ݼ ϰ , FMM ϴ Դϴ.
, ݼǿ Ͽ ϴ ̼ϸ پ ϵ ϴٴ ֽϴ.
̿ Ͽ ũ ⺻ Ѱ赵 ֽϴ. , ߿κ ũ ̸ ȭ, , ũ β Ͽ ũ Ȧ ȭҵ ũ Ȧ Ȯ ġDZⰡ ġ . ̷ ũ ȿ(shadow effect) մϴ.
ũ ũⰡ ϸ鼭 ǰ Ǵ ó Ͼ, ũ β ̻ Ⱑ 鼭 Ѱ迡 ̸ ֽϴ. ̿ Ͽ ũ Ȧ ϴ ս ũ, ũ ü ̵ ϰ . ο , ư ʹ ʿ Դϴ.
ʹ ʿ ũ OLED TV Ȱ ǰ , ߿(plane source) , , μ ǰ ֽϴ. Ư, ߿(linear source) ߿(plane source) ٲٰ Ǹ ȭ Ի簢 ִٴ Ư¡ .
OLED, , >>
OLED ־ Ư 꼺 ū Ĩϴ. , ҿ Ⱑ ħϰ Ǹ, ҿ ݼӰ ǥ ȭ, ü ݼ , ַ ذ и Ͽ ϴ (dark spot) . ̷ ð Ҽ Ŀ鼭 ߱ ٿ OLED ŵϴ. , OLED η ҿ Ⱑ ħϴ ʿϰ .
̷ ҿ ߰ų ϸ鼭 OLED ɿ ʵ پ Ͽ Խϴ. ̵ ũ зϸ ݼ̳ Ѳ(can, lid) ĵ , ϴ ̺긮 , , Ȥ ̻ ڸ ϴ ڸ . ݼ ϴ ĵ Ϲ (getter) ϰ ְ, Ͽ ǰ մϴ. ҳ ߱, ȭ, , β Ѱ踦 ֽϴ. ϴ Ͽ ǰ ϸ Ư , ȭ, , β մϴ.
̺긮 ̸ŭ̳ پѵ, ȭ 꼺 鿡 ̹ Ǿ, ϹǷ β, Ư ־ ־ ݰ(Radius of Curvature, RoC) ̴µ Ѱ谡 , ʿ Ͽ ħ ִ а Ҹ ̴ ʿϰ . öƽ ϼ ¶ ߱ ֽϴ.
ڸ Ŀ OLED ڿ ر Ŀ ̾ ̷ ϴµ, ϼ , ҿ ȭ, , ߱, β , 꼺 Ϻ . ̸ ũ Ȧ(pin hole) ڸ , õǴ ̷ µ ̷ ֽϴ.
ĵ , OLED, ̺긮 TV , ڸ , öƽ OLED ǰ . ķδ Ⱑ Ұϸ, β Կ Ҹ ĵ پ ̸, ̺긮 İ ڸ Ȱ ˴ϴ. , ϼ , ڸ ַ ڸ.
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