JP6416128B2 - 薄膜トランジスターの製作方法 - Google Patents
薄膜トランジスターの製作方法 Download PDFInfo
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- JP6416128B2 JP6416128B2 JP2015557319A JP2015557319A JP6416128B2 JP 6416128 B2 JP6416128 B2 JP 6416128B2 JP 2015557319 A JP2015557319 A JP 2015557319A JP 2015557319 A JP2015557319 A JP 2015557319A JP 6416128 B2 JP6416128 B2 JP 6416128B2
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- 229910052782 aluminium Inorganic materials 0.000 description 6
- 230000009977 dual effect Effects 0.000 description 6
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- UBSJOWMHLJZVDJ-UHFFFAOYSA-N aluminum neodymium Chemical compound [Al].[Nd] UBSJOWMHLJZVDJ-UHFFFAOYSA-N 0.000 description 1
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- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- NJWNEWQMQCGRDO-UHFFFAOYSA-N indium zinc Chemical compound [Zn].[In] NJWNEWQMQCGRDO-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/34—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies not provided for in groups H01L21/0405, H01L21/0445, H01L21/06, H01L21/16 and H01L21/18 with or without impurities, e.g. doping materials
- H01L21/44—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/38 - H01L21/428
- H01L21/441—Deposition of conductive or insulating materials for electrodes
- H01L21/445—Deposition of conductive or insulating materials for electrodes from a liquid, e.g. electrolytic deposition
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- 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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- H01L29/41725—Source or drain electrodes for field effect devices
- H01L29/41758—Source or drain electrodes for field effect devices for lateral devices with structured layout for source or drain region, i.e. the source or drain region having cellular, interdigitated or ring structure or being curved or angular
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- H01L29/41725—Source or drain electrodes for field effect devices
- H01L29/41775—Source or drain electrodes for field effect devices characterised by the proximity or the relative position of the source or drain electrode and the gate electrode, e.g. the source or drain electrode separated from the gate electrode by side-walls or spreading around or above the gate electrode
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- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
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- H01L29/78621—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 characterised by the drain or the source properties, e.g. the doping structure, the composition, the sectional shape or the contact structure with LDD structure or an extension or an offset region or characterised by the doping profile
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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 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
- 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
- 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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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Thin Film Transistor (AREA)
- Electrodes Of Semiconductors (AREA)
Description
本発明の実施例1は、ゲート電極、ゲート絶縁層、エッチングストップ層及びソースドレイン電極を形成するステップと、活性層およびオーミックコンタクト層を形成するステップとを含む薄膜トランジスターの製作方法を提供する。活性層およびオーミックコンタクト層を形成するステップは、パターニング工程を行ってゲート絶縁層にお互いに連通する第1溝部と第2溝部を形成し、第1溝部は活性層を形成すべき領域に対応し、且つ、形成すべき活性層と一致する形状を有し、第2溝部はオーミックコンタクト層を形成すべき領域に対応し、且つ、形成すべきオーミックコンタクト層と一致する形状を有するステップと、第1溝部中に活性層を、第2溝部中にオーミックコンタクト層を形成するステップと、を含む。
本発明の実施例2は他の薄膜トランジスターの製作方法を提供するが、デュアルトーンマスクによってゲート絶縁層をパターニングする点において、実施例1と差異が存在する。
まず、ゲート絶縁層上にフォトレジスト層を形成し、デュアルトーンマスクによってフォトレジスト層を対して露光と現像を行うことで、フォトレジスト完全除去領域、フォトレジスト部分保留領域およびフォトレジスト完全保留領域を形成する。ここで、フォトレジスト完全除去領域は活性層を形成すべき領域に対応し、フォトレジスト部分保留領域はオーミックコンタクト層を形成すべき領域に対応し、フォトレジスト完全保留領域はほかの領域に対応する。
フォトレジスト完全除去領域のゲート絶縁層をエッチングして、第1溝部を形成し、その後、注入法により第1溝部内に活性層を形成する。
フォトレジスト部分保留領域のフォトレジスト除去し、且つ、当該領域のゲート絶縁層をエッチングして、第2溝部を形成し、その後、注入法により第2溝部内にオーミックコンタクト層を形成する。
最後に、フォトレジスト完全保留領域のフォトレジストを除去する。
本実施例は、さらに他の薄膜トランジスターの製作方法を提供するが、オーミックコンタクト層の導電性が均一ではなく、活性層からソースドレイン電極への方向において徐々に高まるという点において、実施例1と差異が存在する。
マルチトーンマスクによってフォトレジスト層に対して露光及び現像を行って、フォトレジスト完全除去領域、第1〜第nフォトレジスト部分保留領域およびフォトレジスト完全保留領域を形成し、ここで、nは2以上であり、第1フォトレジスト部分保留領域から第nフォトレジスト部分保留領域までフォトレジストの厚さは順次に増加し、フォトレジスト完全除去領域は活性層を形成すべき領域に対応し、第1〜第nフォトレジスト部分保留領域はオーミックコンタクト層を形成すべき領域に対応し、フォトレジスト完全保留領域は他の領域に対応し、
フォトレジスト完全除去領域のゲート絶縁層をエッチングして第1溝部を形成し、その後、注入法によって第1溝部内に活性層を形成し、
第1フォトレジスト部分保留領域のフォトレジストを除去し、且つ、当該領域に対応するゲート絶縁層をエッチングして第2溝部の第1部分を形成し、その後、注入法によって当該第2溝部の第1部分内に第1サブオーミックコンタクト層を形成し、
第2フォトレジスト部分保留領域のフォトレジストを除去し、且つ、当該領域に対応するゲート絶縁層をエッチングして第2溝部の第2部分を形成し、その後、注入法によって当該第2溝部の第2部分内に第2サブオーミックコンタクト層を形成し、
このように、第nフォトレジスト部分保留領域までのフォトレジストを除去し、且つ、当該領域に対応するゲート絶縁層をエッチングして第2溝部の第n部分を形成し、その後、注入法によって当該第2溝部の第n部分内に第nサブオーミックコンタクト層を形成し、
フォトレジスト完全保留領域のフォトレジストを除去する。
本実施例は、前記実施例の製作方法によって製作された薄膜トランジスターを提供する。当該酸化物薄膜トランジスターは、ゲート電極、ゲート絶縁層、活性層、オーミックコンタクト層、エッチングストップ層およびソースドレイン電極を備える。ゲート絶縁層は、活性層の形状と一致する形状を有する第1溝部と、オーミックコンタクト層の形状と一致する形状を有する第2溝部とを備える。第1溝部と第2溝部はお互いに連通する。活性層は第1溝部に形成され、オーミックコンタクト層は第2溝部に形成される。
本実施例は、前記薄膜トランジスターを備える表示装置を提供する。例えば、当該表示装置は、アレイ基板、液晶パネル、電子ペーパー、OLEDパネル、液晶テレビ、液晶ディスプレイ、ディジタルフォトフレーム、携帯電話、タブレットコンピュータ等の表示機能を有するいかなる製品または部品であってもよい。
2 ゲート電極
3 ゲート絶縁層
4 活性層
5a,5b オーミックコンタクト層
6 エッチングストップ層
7a ソース電極
7b ドレイン電極
301 基板
302 ゲート電極
303 ゲート絶縁層
304 活性層
305a オーミックコンタクト層
306 エッチングストップ層
307a ソース電極
307b ドレイン電極
308 パシベーション層
308a ビアホール
309 画素電極
310 フォトレジスト層
311 第1溝部
312 マスク
312a 透光領域
321 第2溝部
330 フォトレジスト完全保留領域
331 フォトレジスト完全除去領域
401 基板
402 ゲート電極
403 ゲート絶縁層
404 活性層
405a オーミックコンタクト層
406 エッチングストップ層
407a ソース電極
407b ドレイン電極
408 パシベーション層
408a ビアホール
409 画素電極
410 フォトレジスト層
411 第1溝部
412 デュアルトーンマスク
412a 透光領域
412b 部分透光領域
421 第2溝部
430 フォトレジスト完全保留領域
431 フォトレジスト完全除去領域
432 フォトレジスト部分保留領域
501 基板
502 ゲート電極
503 ゲート絶縁層
504 活性層
505a−1 第1サブオーミックコンタクト層
505a−2 第2サブオーミックコンタクト層
505a−3 第3サブオーミックコンタクト層
507a ソース電極
507b ドレイン電極
510 フォトレジスト層
511 第1溝部
512 マスク
512a 完全露光領域
512c 露光領域
512c−1 5分の一の露光領域
512c−2 3分の一の露光領域
512c−3 2分の一の露光領域
521−1 第2溝部の第1部分
521−2 第2溝部の第2部分
521−3 第2溝部の第3部分
530 フォトレジスト完全保留領域
531 フォトレジスト完全除去領域
532 第1フォトレジスト部分保留領域
533 第2フォトレジスト部分保留領域
534 第3フォトレジスト部分保留領域
Claims (8)
- ゲート電極、ゲート絶縁層、活性層、オーミックコンタクト層、ソース電極およびドレイン電極を備える薄膜トランジスターの製作方法であって、
前記ゲート絶縁層上にお互いに連通する第1溝部と第2溝部とを形成し、前記第1溝部と前記活性層との形状が一致し、前記第2溝部と前記オーミックコンタクト層との形状が一致し、
前記活性層を前記第1溝部内に形成し、
インクジェットプリント法によって前記オーミックコンタクト層を前記第2溝部内に形成することを特徴とする薄膜トランジスターの製作方法。 - 前記オーミックコンタクト層が単一の導電性を有する請求項1に記載の薄膜トランジスターの製作方法。
- 前記オーミックコンタクト層の導電性が非単一であり、前記薄膜トランジスターの製作方法が、
ゲート絶縁層上にフォトレジスト層を形成し、
前記フォトレジスト層に対して露光および現像を行って、フォトレジスト完全除去領域、第1〜第nフォトレジスト部分保留領域およびフォトレジスト完全保留領域を形成し、ここで、nは2以上であり、第1フォトレジスト部分保留領域から第nフォトレジスト部分保留領域までフォトレジストの厚さが順次に増加し、フォトレジスト完全除去領域が活性層を形成すべき領域に対応し、第1〜第nフォトレジスト部分保留領域がオーミックコンタクト層を形成すべき領域に対応し、フォトレジスト完全保留領域が他の領域に対応し、
フォトレジスト完全除去領域のゲート絶縁層をエッチングして第1溝部を形成し、その後、第1溝部内に活性層を形成し、
第1フォトレジスト部分保留領域のフォトレジストを除去し、且つ、当該領域に対応するゲート絶縁層をエッチングして第2溝部の第1部分を形成し、その後、インクジェットプリント法によって当該第2溝部の第1部分内に第1サブオーミックコンタクト層を形成し、
第2フォトレジスト部分保留領域のフォトレジストを除去し、且つ、当該領域に対応するゲート絶縁層をエッチングして第2溝部の第2部分を形成し、その後、インクジェットプリント法によって当該第2溝部の第2部分内に第2サブオーミックコンタクト層を形成し、
前記第1サブオーミックコンタクト層および前記第2サブオーミックコンタクト層の形成と同じように他のサブオーミックコンタクト層を形成していき、最後に、第nフォトレジスト部分保留領域までのフォトレジストを除去し、且つ、当該領域に対応するゲート絶縁層をエッチングして第2溝部の第n部分を形成し、その後、インクジェットプリント法によって当該第2溝部の第n部分内に第nサブオーミックコンタクト層を形成し、
フォトレジスト完全保留領域のフォトレジストを除去す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ーの製作方法。 - 前記第1サブオーミックコンタクト層、第2サブオーミックコンタクト層、…、第nサブオーミックコンタクト層が同一層に位置す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ーの製作方法。
- 前記第2溝部が前記第1溝部の外側に位置す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ーの製作方法。
- 前記第1溝部と前記第2溝部とが同じ深さを有す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ーの製作方法。
- 前記活性層と前記オーミックコンタクト層とが同一層に位置す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ーの製作方法。
- 前記活性層がインクジェットプリント法によって形成されることを特徴とする請求項1〜3のいずれの1項に記載の薄膜トランジスターの製作方法。
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CN103119699B (zh) * | 2010-09-22 | 2016-08-17 | 凸版印刷株式会社 | 薄膜晶体管及其制造方法和图像显示装置 |
JP5700291B2 (ja) * | 2011-03-24 | 2015-04-15 | 凸版印刷株式会社 | 薄膜トランジスタとその製造方法、および当該薄膜トランジスタを用いた画像表示装置 |
JP2013016611A (ja) * | 2011-07-04 | 2013-01-24 | Sony Corp | 半導体装置及びその製造方法、並びに、画像表示装置の製造方法 |
CN103165471A (zh) * | 2013-02-19 | 2013-06-19 | 京东方科技集团股份有限公司 | 薄膜晶体管及其制作方法和显示装置 |
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US9312146B2 (en) | 2016-04-12 |
EP2960942A4 (en) | 2016-10-05 |
EP2960942A1 (en) | 2015-12-30 |
KR20140113902A (ko) | 2014-09-25 |
CN103325841B (zh) | 2016-01-27 |
CN103165471A (zh) | 2013-06-19 |
CN103325841A (zh) | 2013-09-25 |
JP2016507905A (ja) | 2016-03-10 |
EP2960942B1 (en) | 2019-12-04 |
KR101613029B1 (ko) | 2016-04-15 |
US20150102338A1 (en) | 2015-04-16 |
WO2014127645A1 (zh) | 2014-08-28 |
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