JP2013228668A - 液晶ディスプレイ装置とその製造方法 - Google Patents
液晶ディスプレイ装置とその製造方法 Download PDFInfo
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- JP2013228668A JP2013228668A JP2012258332A JP2012258332A JP2013228668A JP 2013228668 A JP2013228668 A JP 2013228668A JP 2012258332 A JP2012258332 A JP 2012258332A JP 2012258332 A JP2012258332 A JP 2012258332A JP 2013228668 A JP2013228668 A JP 2013228668A
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- 239000000758 substrate Substances 0.000 claims description 30
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- 239000012535 impurity Substances 0.000 claims description 20
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- 230000003071 parasitic effect Effects 0.000 claims description 9
- 239000004065 semiconductor Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
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- 229910021417 amorphous silicon Inorganic materials 0.000 description 6
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 5
- 229910052750 molybdenum Inorganic materials 0.000 description 5
- 239000011733 molybdenum Substances 0.000 description 5
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- 229910052779 Neodymium Inorganic materials 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
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- 239000011159 matrix material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 208000022010 Lhermitte-Duclos disease Diseases 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
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- TYHJXGDMRRJCRY-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) tin(4+) Chemical compound [O-2].[Zn+2].[Sn+4].[In+3] TYHJXGDMRRJCRY-UHFFFAOYSA-N 0.000 description 1
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- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
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- H01L27/1222—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or crystalline structure of the active layer
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- H—ELECTRICITY
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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Abstract
【解決手段】表示領域に形成されたピクセルTFT(Thin Film Transistor)と、非表示領域に形成されたゲートドライバのバッファTFTと、を含み、前記ピクセルTFTと前記バッファTFTは、LDD(Lightly Doped Drain)長さが互いに異なることを特徴とする。
【選択図】図12
Description
111 バッファ層
112 ゲート
113 ゲート絶縁層
114 アクティブ
115 ソース
116 ドレイン
117 高濃度のドーピング層
118 LDD(Lightly Doped Drain)
119 遮光層
CNT コンタクト
M1,M2 マスク
140 ゲートライン
150 データライン
160 駆動ライン
170 受信ライン
G ゲート
D ドレイン
S ソース
A アクティブ
PR フォトレジスト(photoresist)
200 GIP(gate in panel)
220 テールTFT(tail TFT)
300 パッド部
Claims (15)
- タッチ機能が内蔵された液晶ディスプレイ装置において、
表示領域に形成されたピクセルTFT(Thin Film Transistor)と、
非表示領域に形成されたゲートドライバのバッファTFTと、
を含み、
前記ピクセルTFTのLDD(Lightly Doped Drain)長さよりも前記バッファTFTのLDD長さが短く形成された
ことを特徴とする、液晶ディスプレイ装置。 - 前記ピクセルTFTのLDD長さと前記バッファTFTのLDD長さとの比率は、1:0.7〜1:0.9である
ことを特徴とする、請求項1に記載の液晶ディスプレイ装置。 - 前記バッファTFTとピクセルTFTとの間に接続されたテールTFTをさらに含み、
前記ピクセルTFTのLDD長さよりも前記テールTFTのLDD長さが短く形成された
ことを特徴とする、請求項1に記載の液晶ディスプレイ装置。 - 前記バッファTFTのLDD長さと前記テールTFTのLDD長さは同一である
ことを特徴とする、請求項3に記載の液晶ディスプレイ装置。 - 前記バッファTFTのLDD長さよりも前記テールTFTのLDD長さが短く形成された
ことを特徴とする、請求項3に記載の液晶ディスプレイ装置。 - 前記ピクセルTFTのLDD長さと前記バッファTFTのLDD長さとの比率は、1:0.7〜1:0.9であり、
前記ピクセルTFTのLDD長さと前記テールTFTのLDD長さとの比率は、1:0.5〜1:0.9である
ことを特徴とする、請求項3に記載の液晶ディスプレイ装置。 - 前記ピクセルTFT、前記バッファTFT及び前記テールTFTのLDD長さを互いに異なるように形成して、液晶パネルの内部の寄生キャパシタンスを均一化させ、TFTのRon特性を調節した
ことを特徴とする、請求項3に記載の液晶ディスプレイ装置。 - 前記ゲートドライバは、ゲートインパネル(gate in panel)方式でTFTアレイ基板に形成され、
タッチ検出のためのタッチセンサがインセルタッチパネル方式で前記TFTアレイ基板に形成された
ことを特徴とする、請求項1に記載の液晶ディスプレイ装置。 - タッチ機能が内蔵された液晶ディスプレイ装置の製造方法において、
第1長さのLDD(Lightly Doped Drain)を有するピクセルTFT(Thin Film Transistor)を表示領域に形成するステップと、
第2長さのLDDを有するゲートドライバのバッファTFTを非表示領域に形成するステップと、
を含み、
前記ピクセルTFTのLDD長さよりも前記バッファTFTのLDD長さを短く形成する
ことを特徴とする、液晶ディスプレイ装置の製造方法。 - 前記バッファTFTと前記ピクセルTFTとの間の非表示領域にテールTFTをさらに形成し、
前記ピクセルTFTのLDD長さよりも前記テールTFTのLDD長さを短く形成することを特徴とする、請求項9に記載の液晶ディスプレイ装置の製造方法。 - 前記バッファTFTのLDD長さと前記テールTFTのLDD長さを同一に形成する
ことを特徴とする、請求項10に記載の液晶ディスプレイ装置の製造方法。 - ガラス基板上にバッファ層を形成し、前記バッファ層上の一部領域に半導体物質でアクティブを形成するステップと、
前記バッファ層及びアクティブを覆うようにゲート絶縁層を形成するステップと、
前記ゲート絶縁層上にゲートメタルを形成するステップと、
前記ゲートメタル上に第1フォトレジストマスクを形成した後、エッチング工程により前記ゲートメタルをパターニングして、前記アクティブと重なる領域にゲートを形成するステップと、
前記ゲートをマスクとして用いて、前記アクティブの外郭に低濃度のNタイプまたはPタイプの不純物をドーピングするステップと、
を含み、
前記表示領域のピクセルTFTに第1長さのLDDを形成し、前記非表示領域のバッファTFTに第2長さのLDDを形成する
ことを特徴とする、請求項11に記載の液晶ディスプレイ装置の製造方法。 - 前記ゲート、及び低濃度の不純物がドーピングされた領域の一部を覆うように第2フォトレジストマスクを形成するステップと、
前記低濃度の不純物がドーピングされた領域の外郭に高濃度のNタイプまたはPタイプの不純物をドーピングするステップと、
を含んで、前記LDDの外郭にソースとドレインを形成する
ことを特徴とする、請求項12に記載の液晶ディスプレイ装置の製造方法。 - ゲートを形成するとき、ゲートの最小線幅を調節して前記ピクセルTFT、前記テールTFT及び前記バッファTFTのLDD長さを調節する
ことを特徴とする、請求項12に記載の液晶ディスプレイ装置の製造方法。 - 前記ソース及びドレインを形成するとき、高濃度の不純物のドーピングを遮断する第2フォトレジストマスクの最小線幅を調節して前記ピクセルTFT、前記テールTFT及び前記バッファTFTのLDD長さを調節する
ことを特徴とする、請求項13に記載の液晶ディスプレイ装置の製造方法。
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