JP2012248865A - アクティブマトリクス基板及びそれを備えた表示パネル - Google Patents
アクティブマトリクス基板及びそれを備えた表示パネル Download PDFInfo
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- 239000010408 film Substances 0.000 claims description 284
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 6
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- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
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Abstract
【解決手段】マトリクス状の複数の画素電極Pと、各画素電極Pに接続されたTFT5と、互いに平行に延びる複数のソース線15aとを備え、TFT5が、絶縁基板10上のゲート電極11aと、ゲート電極11aを覆うゲート絶縁膜12aと、ゲート絶縁膜12a上でゲート電極11aに重なる酸化物半導体層13aと、酸化物半導体層13aに接続されたソース電極17a及びドレイン電極17bとを備え、ソース電極17a及びドレイン電極17bと酸化物半導体層13aとの間には、酸化物半導体層13aを覆う保護絶縁膜14aが設けられ、各ソース線15aは、金属材料により形成され、ソース電極17a及びドレイン電極17bは、各画素電極Pと同一材料により形成されている。
【選択図】図6
Description
図1〜図9は、本発明に係るアクティブマトリクス基板及びそれを備えた表示パネル、並びにアクティブマトリクス基板の製造方法の実施形態1を示している。具体的に図1は、本実施形態の液晶表示パネル50の断面図である。また、図2は、液晶表示パネル50を構成するアクティブマトリクス20aの各画素を示す平面図であり、図3は、そのゲート端子17caが形成された部分の平面図であり、図4は、そのソース端子17cbが形成された部分の平面図であり、図5は、そのゲートソース接続部17dが形成された部分の平面図である。さらに、図6は、図2中のVI−VI線に沿ったアクティブマトリクス基板20aの画素部の断面図であり、図7は、図3及び図4のVII−VII線に沿ったアクティブマトリクス基板20aのゲート端子17ca及びソース端子17cbが形成された部分の断面図であり、図8は、図5中のVIII−VIII線に沿ったアクティブマトリクス20aのゲートソース接続部17dが形成された部分の断面図である。
まず、ガラス基板などの絶縁基板10の基板全体に、スパッタリング法により、例えば、チタン膜(厚さ50nm程度)、アルミニウム膜(厚さ200nm程度)及びチタン膜(厚さ100nm程度)などを順に積層した第1の金属膜を成膜し、その後、第1のフォトマスクを用いたフォトリソグラフィ、第1の金属膜のドライエッチング、レジストの剥離、及び洗浄を行うことにより、図9(a)に示すように、ゲート線(ゲート電極)11a、容量線11b及び中継配線11cを形成する(ゲート電極形成工程)。
まず、ガラス基板などの絶縁基板の基板全体に、スピンコート法により、例えば、カーボンなどの微粒子が分散されたアクリル系の感光性樹脂を塗布し、その塗布された感光性樹脂をフォトマスクを介して露光した後に、現像することにより、ブラックマトリクスを厚さ1.5μm程度に形成する。
まず、例えば、ディスペンサを用いて、上記対向基板作製工程で作製された対向基板30に、紫外線硬化及び熱硬化併用型樹脂などにより構成されたシール材35を枠状に描画する。
図10は、本実施形態の液晶表示パネルを構成するアクティブマトリクス基板20bの製造工程を示す説明図である。なお、以下の各実施形態において、図1〜図9と同じ部分については同じ符号を付して、その詳細な説明を省略する。
図11(a)は、本実施形態の液晶表示パネルを構成するアクティブマトリクス基板20cの断面図であり、図11(b)は、アクティブマトリクス基板20cの製造工程の一部を示す断面図である。
R 感光性樹脂膜
Ra,Rb レジストパターン
5 TFT
10 絶縁基板
11a ゲート線(ゲート電極)
12a ゲート絶縁膜
13a 酸化物半導体層
14 第1の無機絶縁膜(絶縁材料膜)
14a,14b,14c 保護絶縁膜
15 金属膜
15a ソース線
16 第2の無機絶縁膜(他の絶縁材料膜)
16a 層間絶縁膜
17 透明導電膜
17a ソース電極
17b ドレイン電極
20a,20b,20c アクティブマトリクス基板
30 対向基板
40 液晶層(表示媒体層)
50 液晶表示パネル
Claims (7)
- マトリクス状に設けられた複数の画素電極と、
上記各画素電極にそれぞれ接続された複数の薄膜トランジスタと、
互いに平行に延びるように設けられた複数のソース線とを備え、
上記各薄膜トランジスタが、絶縁基板に設けられたゲート電極と、該ゲート電極を覆うように設けられたゲート絶縁膜と、該ゲート絶縁膜上に上記ゲート電極に重なるように設けられた酸化物半導体層と、互いに対峙するように設けられ、該酸化物半導体層にそれぞれ接続されたソース電極及びドレイン電極とを備えたアクティブマトリクス基板であって、
上記ソース電極及びドレイン電極と上記酸化物半導体層との間には、該酸化物半導体層を覆うように保護絶縁膜が設けられ、
上記各ソース線は、金属材料により形成され、
上記ソース電極及びドレイン電極は、上記各画素電極と同一材料により形成されていることを特徴とするアクティブマトリクス基板。 - 請求項1に記載されたアクティブマトリクス基板において、
上記ドレイン電極は、上記各画素電極と一体に形成され、
上記ソース電極は、上記各画素電極と同一層に形成されていることを特徴とするアクティブマトリクス基板。 - 請求項1又は2に記載されたアクティブマトリクス基板において、
上記各ソース線と交差する方向に互いに平行に延びるように設けられた複数のゲート線を備え、
上記各ゲート線と上記各ソース線との交差部分には、上記ゲート絶縁膜及び保護絶縁膜が配置されていることを特徴とするアクティブマトリクス基板。 - 請求項3に記載されたアクティブマトリクス基板において、
上記保護絶縁膜は、塗布型の絶縁膜であることを特徴とするアクティブマトリクス基板。 - 請求項1乃至4の何れか1つに記載されたアクティブマトリクス基板において、
上記各画素電極と上記保護絶縁膜との間には、層間絶縁膜が設けられていることを特徴とするアクティブマトリクス基板。 - 請求項1乃至5の何れか1つに記載されたアクティブマトリクス基板において、
上記酸化物半導体層は、In-Ga-Zn-O系であることを特徴とするアクティブマトリクス基板。 - 互いに対向するように設けられたアクティブマトリクス基板及び対向基板と、
上記アクティブマトリクス基板及び対向基板の間に設けられた表示媒体層とを備えた表示パネルであって、
上記アクティブマトリクス基板は、
マトリクス状に設けられた複数の画素電極と、
上記各画素電極にそれぞれ接続された複数の薄膜トランジスタと、
互いに平行に延びるように設けられた複数のソース線とを備え、
上記各薄膜トランジスタが、絶縁基板に設けられたゲート電極と、該ゲート電極を覆うように設けられたゲート絶縁膜と、該ゲート絶縁膜上に上記ゲート電極に重なるように設けられた酸化物半導体層と、互いに対峙するように設けられ、該酸化物半導体層にそれぞれ接続されたソース電極及びドレイン電極とを備え、
上記ソース電極及びドレイン電極と上記酸化物半導体層との間には、該酸化物半導体層を覆うように保護絶縁膜が設けられ、
上記各ソース線は、金属材料により形成され、
上記ソース電極及びドレイン電極は、上記各画素電極と同一材料により形成されていることを特徴とする表示パネル。
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JPWO2011077607A1 (ja) | 2013-05-02 |
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EP2518772A4 (en) | 2016-09-07 |
JP5095865B2 (ja) | 2012-12-12 |
US20130023086A1 (en) | 2013-01-24 |
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