JP4994014B2 - フラットパネルディスプレイに使用される薄膜トランジスタの製造方法 - Google Patents
フラットパネルディスプレイに使用される薄膜トランジスタの製造方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 50
- 239000010409 thin film Substances 0.000 title claims description 34
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 229920002120 photoresistant polymer Polymers 0.000 claims description 107
- 239000000758 substrate Substances 0.000 claims description 54
- 229910052751 metal Inorganic materials 0.000 claims description 40
- 239000002184 metal Substances 0.000 claims description 40
- 239000004973 liquid crystal related substance Substances 0.000 claims description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 238000000059 patterning Methods 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 238000004380 ashing Methods 0.000 claims description 6
- 238000001039 wet etching Methods 0.000 claims 1
- 239000010408 film Substances 0.000 description 68
- 238000005530 etching Methods 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910021417 amorphous silicon Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009125 cardiac resynchronization therapy Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
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- 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 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
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
- H01L29/4908—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET for thin film semiconductor, e.g. gate of TFT
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- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66742—Thin film unipolar transistors
- H01L29/6675—Amorphous silicon or polysilicon transistors
- H01L29/66765—Lateral single gate single channel transistors with inverted structure, i.e. the channel layer is formed after the gate
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- G—PHYSICS
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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
- 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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- G02F1/136231—Active matrix addressed cells for reducing the number of lithographic steps
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- 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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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
従って、マスク数を節減して工程を単純化し得る新しい液晶表示素子の製造工程が求められている。
ここで、前記第1金属膜53はスパッタリング方法で形成することができる。
その後、前記回折マスク90を利用して光を選択的に前記フォトレジスト膜83に照射する。
53 第1金属膜
53P ゲート配線
53P1 ゲートパッド
53P2 ゲート電極
54 ゲート酸化膜
55 シリコン層
57 絶縁膜
81 第1フォトレジストパターン
83 フォトレジスト膜
Claims (7)
- 基板上に第1金属層を形成し、前記第1金属層上に第1マスクを用いて第1フォトレジストパターンを形成する段階と、
前記第1フォトレジストパターンを用いて前記第1金属層をパターニングして前記基板上にゲート電極を形成する段階と、
前記基板上に絶縁層、シリコン層及びエッチストッパー層を形成する段階と、
第2マスクを用いて前記エッチストッパー層上に異なる厚さを有する第2フォトレジストパターンを形成する段階と、
前記第2フォトレジストパターンを用いて前記絶縁層、シリコン層及びエッチストッパー層をパターニングしてアクティブパターン及び予備エッチストッパーを形成する段階と、
前記第2フォトレジストパターンをアッシングして第3フォトレジストパターンを形成する段階と、
前記第3フォトレジストパターンを用いて前記予備エッチストッパーをパターニングしてエッチストッパーを形成する段階と、
前記第3フォトレジストパターン及び前記エッチストッパーを含む前記基板上にオーミックコンタクト層及び第2金属層を形成する段階と、
前記第3フォトレジストパターン並びに該第3フォトレジストパターン上の前記オーミックコンタクト層及び前記第2金属層を選択的に除去する段階と、
第3マスクを用いて前記基板上に第4フォトレジストパターンを形成する段階と、
前記第4フォトレジストパターンを用いて残りの第2金属層をパターニングしてソース電極及びドレイン電極を形成する段階と、
前記第4フォトレジストパターンをアッシングして第5フォトレジストパターンを形成する段階と、
前記基板上に透明導電層を形成する段階と、
前記第5フォトレジストパターン及び該第5フォトレジストパターン上の前記透明導電層を選択的に除去して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の製造方法。
- チャネル形成部分に対応する前記第2フォトレジストパターンが、前記ソース及びドレイン電極に対応する前記第2フォトレジストパターンよりも相対的に厚いことを特徴とする請求項1に記載の製造方法。
- 前記エッチストッパーが前記アクティブパターンのチャネル形成部分を覆うことを特徴とする請求項2に記載の製造方法。
- 薄膜トランジスタ部、データライン部、ゲートパッド部、及びデータパッド部が定義された絶縁基板を準備する段階と、
前記基板上に第1金属層を形成し、前記第1金属層上に第1マスクを利用して第1フォトレジストパターンを形成する段階と、
前記第1フォトレジストパターンを用いて前記第1金属層をパターニングして、該薄膜トランジスタ部に形成されたゲート電極及び該ゲートパッド部に形成されたゲートパッドを含むように前記絶縁基板上にゲートラインを形成する段階と、
前記第1フォトレジスタパターンが除去される前記絶縁基板上に絶縁層、シリコン層及びエッチストッパー層を形成する段階と、
第2マスクを利用して前記エッチストッパー層上に異なる厚さを有する第2フォトレジストパターンを形成する段階と、
前記第2フォトレジストパターンを用いて前記絶縁層、シリコン層及びエッチストッパー層をパターニングしてアクティブパターン及び予備エッチストッパーを形成する段階と、
前記第2フォトレジストパターンをアッシングして第3フォトレジストパターンを形成する段階と、
前記第3フォトレジストパターンを用いて前記予備エッチストッパーをパターニングしてエッチストッパーを形成する段階と、
第3マスクを利用して前記薄膜トランジスタ部にソース電極及びドレイン電極を含むデータラインを形成し、前記データパッド部にデータパッドを形成する段階と、
前記ドレイン電極に接続される画素電極を形成する段階と
を含み、
チャネル形成部分に対応する前記第2フォトレジストパターンが、前記ソース及びドレイン電極に対応する前記第2フォトレジストパターンよりも相対的に厚く、
前記ゲートパッド部に対応する前記第2フォトレジストパターンが、前記データライン部及び前記データパッド部に対応する前記第2フォトレジストパターンよりも相対的に厚く、
前記ソース及びドレイン電極を形成する段階が、
前記第3フォトレジストパターン及び前記エッチスストッパーを含む前記絶縁基板上に第2金属層を形成する段階と、
前記第3フォトレジストパターン上に位置する前記第2金属層とともに前記第3フォトレジストパターンを選択的に除去する段階と、
前記第3マスクを利用して前記絶縁基板上に第4フォトレジストパターンを形成する段階であって、前記第4フォトレジストパターンは前記ドレイン電極に対応する相対的に薄い部分を有する、段階と、
前記第4フォトレジストパターンを利用して残りの第2金属層をパターニングして、前記薄膜トランジスタ部に形成されたソース及びドレイン電極並びに前記データパッド部に形成されたデータパッドを含むデータラインを形成する段階と
を含み、
前記画素電極を形成する段階が、
前記第4フォトレジストパターンをアッシングすることによって第5フォトレジストパターンを形成する段階であって、該第5フォトレジストパターンは前記第4フォトレジストパターンの相対的に薄い部分を除去することによって形成される、段階と、
前記第5フォトレジストパターンを含む前記絶縁基板上に透明導電層を形成する段階と、
前記第5フォトレジストパターン上に位置する前記透明導電層とともに前記第5フォトレジストパターンを選択的に除去して画素電極を形成する段階と
を含むことを特徴とする液晶表示装置の製造方法。
- 前記残りの第2金属層をウエットエッチング処理でパターニングする段階をさらに備える請求項4に記載の製造方法。
- 前記第2金属層を形成する段階の前に、前記第3フォトレジストパターン及び前記エッチストッパーを含む前記絶縁基板上にオーミックコンタクト層を形成する段階をさらに備える請求項4に記載の製造方法。
- 前記第5フォトレジストパターン及び前記透明導電層をリフトオフする段階をさらに備える請求項4に記載の製造方法。
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KR1020060059975A KR101277218B1 (ko) | 2006-06-29 | 2006-06-29 | 박막 트랜지스터 제조방법 및 액정표시소자의 제조방법 |
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FR (1) | FR2903201B1 (ja) |
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KR101226444B1 (ko) | 2005-12-21 | 2013-01-28 | 삼성디스플레이 주식회사 | 표시 기판의 제조 방법 및 표시 기판 |
KR101240652B1 (ko) * | 2006-04-24 | 2013-03-08 | 삼성디스플레이 주식회사 | 표시 장치용 박막 트랜지스터 표시판 및 그 제조 방법 |
CN100463193C (zh) * | 2006-11-03 | 2009-02-18 | 北京京东方光电科技有限公司 | 一种tft阵列结构及其制造方法 |
KR100917654B1 (ko) * | 2006-11-10 | 2009-09-17 | 베이징 보에 옵토일렉트로닉스 테크놀로지 컴퍼니 리미티드 | 박막트랜지스터 액정 디스플레이 화소 구조 및 그 제조방법 |
KR20080060861A (ko) * | 2006-12-27 | 2008-07-02 | 엘지디스플레이 주식회사 | 박막 트랜지스터 기판 및 이의 제조 방법 |
KR101326129B1 (ko) * | 2007-07-24 | 2013-11-06 | 삼성디스플레이 주식회사 | 유기 박막 트랜지스터 표시판 및 그 제조 방법 |
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- 2006-12-22 FR FR0611254A patent/FR2903201B1/fr not_active Expired - Fee Related
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CN101097371A (zh) | 2008-01-02 |
CN101097371B (zh) | 2013-07-10 |
JP2008010810A (ja) | 2008-01-17 |
FR2903201A1 (fr) | 2008-01-04 |
US7553711B2 (en) | 2009-06-30 |
FR2903201B1 (fr) | 2012-07-20 |
KR101277218B1 (ko) | 2013-06-24 |
US20080003726A1 (en) | 2008-01-03 |
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