JP4527615B2 - 薄膜トランジスタアレイ基板及びその製造方法 - Google Patents
薄膜トランジスタアレイ基板及びその製造方法 Download PDFInfo
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- 239000000758 substrate Substances 0.000 title claims abstract description 84
- 239000010409 thin film Substances 0.000 title claims abstract description 77
- 238000004519 manufacturing process Methods 0.000 title claims description 37
- 239000010408 film Substances 0.000 claims abstract description 106
- 230000001681 protective effect Effects 0.000 claims abstract description 55
- 239000004065 semiconductor Substances 0.000 claims abstract description 54
- 239000010410 layer Substances 0.000 claims description 116
- 238000000034 method Methods 0.000 claims description 83
- 238000003860 storage Methods 0.000 claims description 30
- 229920002120 photoresistant polymer Polymers 0.000 claims description 26
- 229910052751 metal Inorganic materials 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 25
- 239000003990 capacitor Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000000059 patterning Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000011241 protective layer Substances 0.000 claims description 5
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000004380 ashing Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 17
- 238000005530 etching Methods 0.000 description 8
- 238000000206 photolithography Methods 0.000 description 8
- 229910021417 amorphous silicon Inorganic materials 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 6
- 230000005684 electric field Effects 0.000 description 6
- 239000011810 insulating material Substances 0.000 description 6
- 238000004544 sputter deposition Methods 0.000 description 6
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 5
- 238000007740 vapor deposition Methods 0.000 description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 238000001312 dry etching Methods 0.000 description 4
- 229910052750 molybdenum Inorganic materials 0.000 description 4
- 239000011733 molybdenum Substances 0.000 description 4
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 4
- 229910001887 tin oxide Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 2
- 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 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- -1 acrylic organic compound Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 238000000427 thin-film deposition Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/417—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions carrying the current to be rectified, amplified or switched
- H01L29/41725—Source or drain electrodes for field effect devices
- H01L29/41733—Source or drain electrodes for field effect devices for thin film transistors with insulated gate
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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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- 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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- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- 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
- H01L27/1248—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 or shape of the interlayer dielectric specially adapted to the circuit arrangement
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- 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 at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- 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
- H01L27/1259—Multistep manufacturing methods
- H01L27/1288—Multistep manufacturing methods employing particular masking sequences or specially adapted masks, e.g. half-tone mask
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- G—PHYSICS
- G02—OPTICS
- 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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
-
- G—PHYSICS
- G02—OPTICS
- 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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136231—Active matrix addressed cells for reducing the number of lithographic steps
- G02F1/136236—Active matrix addressed cells for reducing the number of lithographic steps using a grey or half tone lithographic process
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- G—PHYSICS
- G02—OPTICS
- 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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
- G02F1/13629—Multilayer wirings
Description
4、104 データライン
6、106 ゲート電極
8、108 ソース電極
10、110 ドレーン電極
12、112 ゲート絶縁膜
14、114 活性層
16、116 オーミック接触層
18、118 保護膜
20、42、56、66、154 コンタクトホール
22、122 画素電極
50、150 ゲートパッド
52、152 ゲートパッド下部電極
54、156 ゲートパッド上部電極
60、160 データパッド
62、162 データパッド下部電極
64、166 データパッド上部電極
118 透明導電パターン
120 チャンネル保護膜
Claims (18)
- ゲートラインに接続されたゲート電極と、
前記ゲート電極上及び前記ゲートライン上のゲート絶縁膜と、
前記ゲート絶縁膜上の半導体層と、
前記半導体層上のソース電極及びドレーン電極と、
前記ソース電極と接続され、前記ゲートラインと交差して画素領域を定義するデータラインと、
前記画素領域に位置し、前記ドレーン電極の側面全体及び上面全体を覆い、そして前記ドレーン電極の側面全体及び上面全体と直接接触している画素電極と、
前記ソース電極及びドレーン電極間の半導体層上に形成され、前記半導体層のチャンネル部を保護するためのチャンネル保護膜と、
を備え、
前記チャンネル保護膜は、前記ソース電極及びドレーン電極間の半導体層の表面をOx及びNxの少なくとも1つと反応させることにより形成されていることを特徴とする薄膜トランジスタアレイ基板。
- 前記チャンネル保護膜は、窒化シリコン又は酸化シリコンの少なくとも一つを含むことを特徴とする請求項1に記載の薄膜トランジスタアレイ基板。
- 前記半導体層は、活性層と、前記活性層上に位置し、前記ソース電極及びドレーン電極間の前記活性層を露出させるオーミック接触層と、を含むことを特徴とする請求項1に記載の薄膜トランジスタアレイ基板。
- 前記チャンネル保護膜は、前記オーミック接触層により露出された前記活性層上に形成されることを特徴とする請求項3に記載の薄膜トランジスタアレイ基板。
- 前記ソース電極の側面全体及び上面全体を覆い、前記画素電極と同じ物質で形成される透明導電パターンをさらに含むことを特徴とする請求項1に記載の薄膜トランジスタアレイ基板。
- 前記ゲートライン及び画素電極と、これらの間に介在されたゲート絶縁膜との重複部分を含むストレージキャパシタをさらに含むことを特徴とする請求項1に記載の薄膜トランジスタアレイ基板。
- 前記ゲートラインから伸張されたゲートパッドをさらに含み、前記ゲートパッドは、前記ゲートラインと接続されたゲートパッド下部電極と、前記ゲート絶縁膜を貫通して前記ゲートパッド下部電極を露出させるコンタクトホールと、前記コンタクトホールを介して前記ゲートパッド下部電極と接続されたゲートパッド上部電極とを備えることを特徴とする請求項1に記載の薄膜トランジスタアレイ基板。
- 前記データラインから伸張されたデータパッドをさらに含み、前記データパッドは、前記データラインと接続され、前記半導体層上に形成されるデータパッド下部電極と、前記データパッド下部電極の側面全体及び上面全体を覆い、前記データパッド下部電極と接触するデータパッド上部電極とを含むことを特徴とする請求項1に記載の薄膜トランジスタアレイ基板。
- 基板上にゲート電極を形成する段階と、
前記ゲート電極上にゲート絶縁膜を形成する段階と、
前記ゲート絶縁膜上に半導体層を形成し、前記半導体層上にソース電極及びドレーン電極を形成する段階と、
前記ソース電極とドレーン電極との間の半導体層の表面をOx及びNxの少なくとも一つと反応させることによりチャンネル保護膜を形成して前記半導体層のチャンネル部を保護する段階と、
前記ドレーン電極の側面全体及び上面全体を覆い、前記ドレーン電極の側面全体及び上面全体と直接接触する画素電極を形成する段階と、を含むことを特徴とする薄膜トランジスタアレイ基板の製造方法。
- 前記ソース電極及びドレーン電極、半導体層及びチャンネル保護膜を形成する段階は、
前記ゲート絶縁膜上に第1及び第2半導体層、ソース/ドレーン金属層を順次形成する段階と、
前記ソース/ドレーン金属層上に、部分露光マスクを用いて段差を持つフォトレジストパターンを形成する段階と、
前記フォトレジストパターンを用いて、前記第1及び第2半導体層、ソース/ドレーン金属層をパターニングして活性層、オーミック接触層、ソース電極及びドレーン電極を形成する段階と、
前記フォトレジストパターンをアッシングする段階と、
前記アッシングされたフォトレジストパターンを用いて、前記チャンネル部に対応するソース/ドレーン金属層及びオーミック接触層をパターニングして、活性層を露出させる段階と、
前記露出された活性層の表面をOx及びNxの少なくとも一つと反応させることにより、前記露出された活性層上にチャンネル保護膜を形成する段階と、
前記アッシングされたフォトレジストパターンを除去する段階と、を含むことを特徴とする請求項9に記載の薄膜トランジスタアレイ基板の製造方法。
- 前記チャンネル保護膜を形成する段階は、前記活性層をなすシリコンと前記Ox及びNxの何れか一つとを反応させることにより、前記活性層上にチャンネル保護膜を形成する段階を含むことを特徴とする請求項10に記載の薄膜トランジスタアレイ基板の製造方法。
- 前記画素電極を形成する段階と同時に、前記ソース電極の側面全体及び上面全体を覆う透明導電パターンを形成する段階をさらに含むことを特徴とする請求項9に記載の薄膜トランジスタアレイ基板の製造方法。
- 前記ゲート電極に接続されたゲートライン、前記ゲートラインに重畳される画素電極及びこれらの間に介在されたゲート絶縁膜を含むストレージキャパシタを形成する段階をさらに含むことを特徴とする請求項9に記載の薄膜トランジスタアレイ基板の製造方法。
- 前記ゲート電極に接続されたゲートラインから伸張されたゲートパッド下部電極を形成する段階と、
前記ゲートパッド下部電極を露出させるために、前記ゲート絶縁膜を貫通するコンタクトホールを形成する段階と、
前記コンタクトホールを介して前記ゲートパッド下部電極に接続されたゲートパッド上部電極を形成する段階と、を含むことを特徴とする請求項9に記載の薄膜トランジスタアレイ基板の製造方法。
- 前記半導体層上に、前記ソース電極に接続されたデータラインから伸張されたデータパッド下部電極を形成する段階と、前記データパッド下部電極の側面全体及び上面全体を覆い、前記データパッド下部電極と接触する前記データパッド上部電極を形成する段階とをさらに含むことを特徴とする請求項9に記載の薄膜トランジスタアレイ基板の製造方法。
- 基板上に、ゲートライン、前記ゲートラインと接続されたゲート電極及び前記ゲートラインから伸張されたゲートパッド下部電極を含む第1導電パターン群を形成する段階と、
前記第1導電パターン群を覆うようにゲート絶縁膜を形成する段階と、
前記ゲート絶縁膜上に半導体層を形成し、前記半導体層上に第2導電パターンを形成する段階であって、前記第2導電パターンは、前記ゲートラインと交差するデータライン、前記データラインに接続されるソース電極、前記ソース電極と対向するドレーン電極、及び前記データラインから伸長するデータパッド下部電極を含む、段階と、
前記ソース電極及びドレーン電極間の前記半導体層の表面をOx及びNxの少なくとも一つと反応させることによりチャンネル保護膜を形成する段階と、
前記ゲート絶縁膜を貫通して前記ゲートパッド下部電極を露出させるコンタクトホールを形成する段階と、
前記第2導電パターン上に、第3導電パターンを形成する段階とを含み、
前記第3導電パターンは、
前記ドレーン電極の側面全体及び上面全体を覆い、前記ドレーン電極の側面全体及び上面全体と直接接触する画素電極、前記データパッド下部電極の側面全体及び上面全体を覆うデータパッド上部電極、及び、前記コンタクトホールを介して、前記ゲートパッド下部電極へ接続するゲートパッド上部電極を含むことを特徴とする薄膜トランジスタアレイ基板の製造方法。
- 前記チャンネル保護膜を形成する段階は、前記半導体層のシリコンと、Ox又はNxの少なくとも一つとを結合させて、前記半導体層上にチャンネル保護膜を形成する段階を含むことを特徴とする請求項16に記載の薄膜トランジスタアレイ基板の製造方法。
- 前記第3導電パターンは、前記ソース電極の側面全体及び上面全体を覆い、前記ソース電極の側面全体及び上面全体と直接接触する透明導電パターンを含むことを特徴とする請求項16に記載の薄膜トランジスタアレイ基板の製造方法。
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