ORGANIC EL DISPLAY DEVICE

To provide an organic EL display device achieving a reduced resistance in a contact region of a TFT substrate and also enhancing moisture barrier properties furthermore.SOLUTION: An organic EL display device includes an organic EL display layer which is formed above a TFT substrate 1 that is obtaine...

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1. Verfasser: KANEGAE ARINOBU
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide an organic EL display device achieving a reduced resistance in a contact region of a TFT substrate and also enhancing moisture barrier properties furthermore.SOLUTION: An organic EL display device includes an organic EL display layer which is formed above a TFT substrate 1 that is obtained by forming a TFT on a substrate 2. In the TFT substrate 1, a first moisture barrier layer 6 is formed so as to cover: a gate insulating layer 4 and a gate electrode 5; a contact region of an oxide semiconductor layer 3 other than a connecting portion of the contact region connected to a source electrode 8 and a connecting portion of the contact region connected to a drain electrode 9; and a region on the substrate 2 where the oxide semiconductor layer 3 is not disposed. In the substrate 2, a second moisture barrier layer 22 is formed above a resin substrate 21, the second moisture barrier layer 22 being in contact with the oxide semiconductor layer 3 and the first moisture barrier layer 6. A cathode of the organic EL display layer is located on the inner side than the outer periphery of a region where the first moisture barrier layer 6 and the second moisture barrier layer 22 are in contact with each other.SELECTED DRAWING: Figure 1 【課題】TFT基板におけるコンタクト領域の低抵抗化を実現するとともに、水分のバリア性をさらに高めた有機EL表示装置を提供する。【解決手段】基板2上にTFTを形成してなるTFT基板1の上方に有機EL表示層が形成された有機EL表示装置であって、TFT基板1には、ゲート絶縁層4及びゲート電極5と、酸化物半導体層3のコンタクト領域のソース電極8、ドレイン電極9との接合部分を除いた領域と、基板2上の酸化物半導体層3が存在しない領域とを覆うように第1の水分バリア層6が形成される。基板2は、樹脂基板21上に第2の水分バリア層22を形成してなり、第2の水分バリア層22は、酸化物半導体層3及び第1の水分バリア層6と接している。有機EL表示層の陰極は、第1の水分バリア層6と第2の水分バリア層22とが接する領域の外周よりも内側に位置する。【選択図】図1