JP5503996B2 - Tft−lcdアレイ基板及びその製造方法 - Google Patents
Tft−lcdアレイ基板及びその製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 20
- 239000010409 thin film Substances 0.000 claims description 118
- 238000000034 method Methods 0.000 claims description 111
- 229920002120 photoresistant polymer Polymers 0.000 claims description 104
- 238000000059 patterning Methods 0.000 claims description 71
- 229910052751 metal Inorganic materials 0.000 claims description 67
- 239000002184 metal Substances 0.000 claims description 67
- 239000004065 semiconductor Substances 0.000 claims description 54
- 238000003860 storage Methods 0.000 claims description 54
- 238000005530 etching Methods 0.000 claims description 20
- 239000003990 capacitor Substances 0.000 claims description 19
- 238000004544 sputter deposition Methods 0.000 claims description 12
- 238000007740 vapor deposition Methods 0.000 claims description 12
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 claims description 10
- 238000004380 ashing Methods 0.000 claims description 9
- 238000000151 deposition Methods 0.000 claims description 9
- 238000011161 development Methods 0.000 claims description 7
- JAONJTDQXUSBGG-UHFFFAOYSA-N dialuminum;dizinc;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Zn+2].[Zn+2] JAONJTDQXUSBGG-UHFFFAOYSA-N 0.000 claims description 4
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 4
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 claims description 4
- 230000014759 maintenance of location Effects 0.000 claims 5
- 239000010408 film Substances 0.000 claims 2
- 239000010410 layer Substances 0.000 description 89
- 239000007789 gas Substances 0.000 description 12
- 150000004767 nitrides Chemical class 0.000 description 10
- 239000012495 reaction gas Substances 0.000 description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000003071 parasitic effect Effects 0.000 description 4
- 239000002356 single layer Substances 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 229910052715 tantalum Inorganic materials 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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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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- 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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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
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- 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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
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- 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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
- H01L27/124—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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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 layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
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- 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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
- H01L27/1255—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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier 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 integrated with passive devices, e.g. auxiliary capacitors
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- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78606—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device
- H01L29/78633—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device with a light shield
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/13—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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body combined with thin-film or thick-film passive components
Description
本例示は、複数のステップのエッチングプロセスを利用して、1回のパターニングプロセスにより、同時にデータライン、ソース電極、ドレイン電極、TFTチャンネル領域、及び画素電極のパターンを形成する技術案であり、その製造工程に関して、すでに上記の図6から図12に示した技術案において詳しく説明したので、ここで重複な説明を略する。
2 遮光金属層
3 第1の絶縁層
4 半導体層
5 ドーピング半導体層
6 ソース電極
7 ドレイン電極
8 第2の絶縁層
9 ゲート電極
10 第3の絶縁層
11 ゲートライン
12 データライン
13 画素電極
14 蓄積容量
15 ゲートラインパッドホール
16 データラインパッドホール
21 透明導電薄膜
22 ドレイン金属薄膜
30 フォトレジスト
Claims (10)
- 画素領域を画成するゲートラインとデータラインを含むTFT−LCDアレイ基板であって、前記画素領域内には、薄膜トランジスタ、基板に形成された画素電極、及び前記画素電極と重なって蓄積容量を構成する透明構造である蓄積電極が設けられ、
前記薄膜トランジスタには、
前記基板に形成された遮光金属層と、
前記遮光金属層に形成された第1の絶縁層と、
前記第1の絶縁層に形成された半導体層と、
前記半導体層に形成されたドーピング半導体層と、
一端が透明導電層を介して前記ドーピング半導体層に形成され、他の一端がデータラインに接続されたソース電極と、
一端が透明導電層を介して前記ドーピング半導体層に形成され、その下方の透明導電層は前記画素電極に連続して形成されることにより、その他の一端が前記画素電極と直接に接続されるドレイン電極と、
ソース電極とドレイン電極との間に形成され、その中の透明導電層とドーピング半導体層が完全にエッチングされるとともに、半導体層の厚さ方向の一部がエッチングされたことにより、その半導体層を露出させるTFTチャンネル領域と、
基板の全体を覆うように形成された第2の絶縁層と、
第2の絶縁層に形成され、TFTチャンネル領域の上方に位置するとともに、ゲートラインに接続されるゲート電極と、
ゲート電極とゲートラインに形成されて、基板の全体を覆う第3の絶縁層と、を含むことを特徴とするTFT−LCDアレイ基板。 - 前記蓄積電極は、酸化インジウムスズ、酸化インジウム亜鉛、又は、酸化アルミウム亜鉛であり、前記第3の絶縁層に形成されたことを特徴とする請求項1に記載のTFT−LCDアレイ基板。
- 前記蓄積電極は、ゲートラインパッドホール及びデータラインパッドホールとともに、同一のパターニングプロセスにおいて形成されたことを特徴とする請求項2に記載のTFT−LCDアレイ基板。
- 前記遮光金属層は、第1の絶縁層、半導体層、及びドーピング半導体層とともに、同一のパターニングプロセスにおいて形成されたことを特徴とする請求項1に記載のTFT−LCDアレイ基板。
- 前記データラインは画素電極とともに、同一のパターニングプロセスにおいて形成されたことを特徴とする請求項1から4のいずれか一項に記載のTFT−LCDアレイ基板。
- 基板に、遮光金属薄膜、第1の絶縁層、半導体薄膜、及びドーピング半導体薄膜を順次堆積し、パターニングプロセスにより、遮光金属層と活性層を含むパターンが形成されるステップ1と、
ステップ1を完成した基板に、透明導電薄膜とソース・ドレイン金属薄膜を順次堆積し、パターニングプロセスにより、データライン、ドレイン電極、ソース電極、TFTチャンネル領域、及び画素電極を含むパターンが形成されて、前記ドレイン電極はその下面において前記画素電極に連続して形成された透明導電層を介して前記画素電極と直接に接続するステップ2と、
ステップ2を完成した基板に、第2の絶縁層とゲート金属薄膜を順次堆積し、パターニングプロセスにより、ゲートラインとTFTチャンネル領域の上方に位置するゲート電極を含むパターンを形成するステップ3と、
ステップ3を完成した基板に、第3の絶縁層と透明導電薄膜を順次堆積し、パターニングプロセスにより、蓄積電極、ゲートラインパッドホール、及びデータラインパッドホールを含むパターンを形成し、前記蓄積電極と前記画素電極が重なって蓄積容量を形成するステップ4と、
を含むTFT−LCDアレイ基板の製造方法。 - 前記ステップ1は、
スッパタリング法又は蒸着法を利用して、基板に遮光金属薄膜を堆積することと、
プラズマ強化化学的気相蒸着法を利用して、第1の絶縁層、半導体薄膜、及びドーピング半導体薄膜を順次堆積することと、
普通のマスクを採用して、パターニングプロセスにより、ドーピング半導体薄膜、半導体薄膜、第1の絶縁層、及び遮光金属薄膜に対してパターニングを行って、遮光金属層と活性層を含むパターンが形成されることと、を含むことを特徴とする請求項6に記載のTFT−LCDアレイ基板の製造方法。 - 前記ステップ2は、
スッパタリング法又は蒸着法を利用して、透明導電薄膜とソース・ドレイン金属薄膜を順次堆積することと、
前記ソース・ドレイン金属薄膜に一層のフォトレジストを塗布することと、
ハーフトーン又はグレートーンのマスクを利用して露光することによって、フォトレジストをフォトレジスト完全除去領域、フォトレジスト完全保留領域、及びフォトレジスト半分保留領域に形成させ、フォトレジスト完全保留領域はデータライン、ソース電極、及びドレイン電極のパターンが形成された領域に対応し、フォトレジスト半分保留域は画素電極のパターンが形成された領域に対応し、フォトレジスト完全除去領域は上記パターン以外の領域に対応し、現像処理した後、フォトレジスト完全保留領域のフォトレジストの厚さに変化がなく、フォトレジスト完全除去領域のフォトレジストが完全に除去され、フォトレジスト半分保留領域のフォトレジストの厚さが薄くなれることと、
第1回目のエッチングプロセスにより、フォトレジスト完全除去領域のソース・ドレイン金属薄膜と透明導電薄膜を完全にエッチングして、データライン、ソース電極、ドレイン電極、及びTFTチャンネル領域のパターンが形成され、ソース電極の一端は前記透明導電膜からなる透明導電層を介して活性層に位置し、他の一端はデータラインに接続し、ドレイン電極の一端は前記透明導電膜からなる透明導電層を介して活性層に位置し、ソース電極と対向して配置され、ソース電極とドレイン電極との間にTFTチャンネル領域が形成され、TFTチャンネル領域のソース・ドレイン金属薄膜、透明導電薄膜、及びドーピング半導体層が完全にエッチングされるとともに、半導体層の厚さ方向の一部がエッチングされて、TFTチャンネル領域の半導体層を露出させることと、
アッシングプロセスにより、フォトレジスト半分保留領域のフォトレジストを除去して、該領域のソース・ドレイン金属薄膜を露出させることと、
第2回目のエッチングプロセスにより、フォトレジスト半分保留領域のソース・ドレイン金属薄膜を完全にエッチングして、画素電極のパターンが形成され、画素電極と前記ドレイン電極とが直接に接続されることと、及び
残されたフォトレジストを剥離することと、
を含むことを特徴とする請求項6に記載のTFT−LCDアレイ基板の製造方法。 - 前記ステップ3は、
プラズマ強化化学的気相蒸着法を利用して第2の絶縁層を堆積することと、
スッパタリング法又は蒸着法を利用してゲート金属薄膜を堆積することと、
普通のマスクを採用して、パターニングプロセスにより、ゲート金属薄膜に対してパターニングを行って、ゲートラインとTFTチャンネル領域の上方に位置するゲート電極を含むパターンが形成されることと、を含むことを特徴とする請求項6に記載のTFT−LCDアレイ基板の製造方法。 - 前記ステップ4は、
プラズマ強化化学的気相蒸着法を利用して第3の絶縁層を堆積することと、
スッパタリング法又は蒸着法を利用して透明導電薄膜を堆積することと、
前記透明導電薄膜に一層のフォトレジストを塗布することと、
ハーフトーン又はグレートーンのマスクを利用して露光することによって、フォトレジストをフォトレジスト完全除去領域、フォトレジスト完全保留領域、及びフォトレジスト半分保留領域に形成させ、フォトレジスト完全除去領域はゲートラインパッドホールとデータラインパッドホールのパターンが形成された領域に対応し、フォトレジスト完全保留領域は蓄積電極のパターンが形成された領域に対応し、フォトレジスト半分保留領域は上記パターン以外の領域に対応し、現像処理を行った後、フォトレジスト完全保留領域のフォトレジストの厚さに変化なく、フォトレジスト完全除去領域のフォトレジストが完全に除去され、フォトレジスト半分保留領域のフォトレジストの厚さが薄くなれることと、
第1回目のエッチングプロセスにより、フォトレジスト完全除去領域の透明導電薄膜と相応する絶縁層を完全にエッチングして、ゲートラインパッドホールとデータラインパッドホールのパターンが形成されることと、
アッシングプロセスにより、フォトレジスト半分保留領域のフォトレジストを除去して、該領域の透明導電薄膜が露出されることと、
第2回目のエッチングプロセスにより、フォトレジスト半分保留領域の透明導電薄膜を完全にエッチングして、蓄積電極のパターンが形成されることと、及び
残されたフォトレジストを剥離することと、を含むことを特徴とする請求項6に記載のTFT−LCDアレイ基板の製造方法。
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CN102779942B (zh) * | 2011-05-24 | 2015-11-25 | 京东方科技集团股份有限公司 | 一种有机薄膜晶体管阵列基板及其制作方法 |
CN102629018B (zh) * | 2011-11-16 | 2016-02-17 | 北京京东方光电科技有限公司 | 彩膜基板、tft阵列基板及其制造方法和液晶显示面板 |
CN102651341B (zh) * | 2012-01-13 | 2014-06-11 | 京东方科技集团股份有限公司 | 一种tft阵列基板的制造方法 |
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CN102800630A (zh) * | 2012-07-26 | 2012-11-28 | 京东方科技集团股份有限公司 | 一种阵列基板及其制备方法和显示装置 |
CN102929061B (zh) * | 2012-11-19 | 2016-01-20 | 深圳市华星光电技术有限公司 | 一种液晶显示装置及其制造方法 |
CN104716091B (zh) * | 2013-12-13 | 2018-07-24 | 昆山国显光电有限公司 | 阵列基板的制备方法、阵列基板和有机发光显示器件 |
CN103700708B (zh) * | 2013-12-19 | 2017-03-15 | 合肥京东方光电科技有限公司 | 一种薄膜晶体管、其制作方法、阵列基板及显示装置 |
CN103928472A (zh) * | 2014-03-26 | 2014-07-16 | 京东方科技集团股份有限公司 | 一种阵列基板及其制作方法和显示装置 |
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