JP2013055080A - 表示装置および表示装置の製造方法 - Google Patents
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- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000010408 film Substances 0.000 claims abstract description 118
- 239000004065 semiconductor Substances 0.000 claims abstract description 96
- 239000010409 thin film Substances 0.000 claims abstract description 43
- 239000010410 layer Substances 0.000 claims description 52
- 230000001681 protective effect Effects 0.000 claims description 38
- 239000000758 substrate Substances 0.000 claims description 31
- 239000011810 insulating material Substances 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000011241 protective layer Substances 0.000 claims description 6
- 238000006392 deoxygenation reaction Methods 0.000 claims description 5
- 238000005530 etching Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 abstract 2
- 239000012774 insulation material Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 description 15
- 239000004973 liquid crystal related substance Substances 0.000 description 7
- 239000011521 glass Substances 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000206 photolithography Methods 0.000 description 4
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 3
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910017767 Cu—Al Inorganic materials 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 229910001080 W alloy Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- -1 moisture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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- 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
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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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- H01L27/1225—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 with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
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Abstract
【解決手段】表示装置は、薄膜トランジスタを含む。薄膜トランジスタは、ゲート電極と、ゲート電極を覆い絶縁物質を含むゲート絶縁層と、前記ゲート絶縁層の上面に接する酸化物半導体膜と、前記酸化物半導体膜の上面にあり互いに離間する第1の領域と第2の領域にそれぞれ接するソース電極およびドレイン電極と、前記第1の領域と前記第2の領域の間の第3の領域に接し、前記絶縁物質を含むチャネル保護膜と、を含む。平面的にみて前記ゲート電極に重なる前記酸化物半導体膜の上面の領域は第3の領域に含まれかつ小さく、前記酸化物半導体膜のうち前記ゲート電極に重なる部分の一部を除く部分は、前記ゲート電極に重なる部分の前記一部より抵抗が低い。
【選択図】図3
Description
の通りである。
Claims (6)
- 絶縁基板と、前記絶縁基板の上に形成された薄膜トランジスタを有する表示装置であって、
前記薄膜トランジスタは、
ゲート電極が設けられた導電層と、
前記導電層の上に設けられ、絶縁物質を含むゲート絶縁層と、
前記ゲート絶縁層の上面に接するとともに前記ゲート電極の上方に設けられた酸化物半導体膜と、
前記酸化物半導体膜の上面にある第1の領域と接するソース電極と、
前記酸化物半導体膜の上面にあり前記第1の領域と離間する第2の領域と接するドレイン電極と、
前記酸化物半導体の上面の前記第1の領域と前記第2の領域の間の第3の領域に接し、前記絶縁物質を含むチャネル保護膜と、
を含み、
平面的にみて前記ゲート電極に重なる前記酸化物半導体膜の部分は、前記チャネル保護膜に重なる前記酸化物半導体膜の部分の一部であり、
前記酸化物半導体膜のうち前記ゲート電極に重なる部分の一部を除く部分は、前記ゲート電極に重なる部分の前記一部より抵抗が低い、
ことを特徴とする表示装置。 - 前記絶縁物質はシリコン酸化物である、
ことを特徴とする請求項1に記載の表示装置。 - 前記酸化物半導体膜は、平面的にみて前記ゲート電極に重なる部分と前記第1の領域に重なる部分との間に前記第3の領域に重なる部分を有し、
前記酸化物半導体膜は、平面的にみて前記ゲート電極に重なる部分と前記第2の領域に重なる部分との間に前記第3の領域に重なる部分を有する、
ことを特徴とする請求項1または2に記載の表示装置。 - 前記第3の領域は、前記第1の領域と前記第2の領域とに接する、
ことを特徴とする請求項1から3のいずれかに記載の表示装置。 - 前記半導体膜のうち前記ゲート電極に重なる部分の一部を除く部分は、前記ゲート電極に重なる部分の前記一部より酸素含有量が低い、
ことを特徴とする請求項1から4のいずれかに記載の表示装置。 - 絶縁基板上にゲート電極が設けられた導電層を形成する工程と、
前記導電層の上に絶縁物質を含むゲート絶縁層を形成する工程と、
前記ゲート絶縁層の上に酸化物半導体層を形成する工程と、
前記酸化物半導体層のうち前記ゲート電極と平面的に重なる部分の一部を除く部分の酸素を除く脱酸素工程と、
前記ゲート電極の上方にある前記酸化物半導体膜を残すように前記酸化物半導体層をエッチングする工程と、
前記絶縁物質を含むチャネル保護層を形成する工程と、
平面的にみて前記酸化物半導体膜の上面のうち前記ゲート電極と重なる領域を含みかつ当該領域より大きい領域に接するチャネル保護膜を残すように前記チャネル保護層をエッチングする工程と、
前記酸化物半導体膜の上面のうち前記チャネル保護膜に接する領域と異なる第1の領域に接するソース電極および前記チャネル保護膜に接する領域および前記第1の領域と異なる第2の領域に接するドレイン電極を形成する電極形成工程と、を含み、
前記電極形成工程は、前記第1の領域と前記第2の領域の間に前記チャネル保護膜に接する領域が存在するように前記ソース電極および前記ドレイン電極を形成する、
ことを特徴とする表示装置の製造方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2011190006A JP2013055080A (ja) | 2011-08-31 | 2011-08-31 | 表示装置および表示装置の製造方法 |
TW101130310A TWI474093B (zh) | 2011-08-31 | 2012-08-21 | 顯示裝置及顯示裝置的製造方法 |
US13/596,089 US8803150B2 (en) | 2011-08-31 | 2012-08-28 | Display device and manufacturing process of display device |
KR1020120095478A KR101364361B1 (ko) | 2011-08-31 | 2012-08-30 | 표시 장치 및 표시 장치의 제조 방법 |
CN201210322625.0A CN102969338B (zh) | 2011-08-31 | 2012-08-30 | 显示装置及显示装置的制造方法 |
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JP2011190006A JP2013055080A (ja) | 2011-08-31 | 2011-08-31 | 表示装置および表示装置の製造方法 |
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JP (1) | JP2013055080A (ja) |
KR (1) | KR101364361B1 (ja) |
CN (1) | CN102969338B (ja) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2017228752A (ja) * | 2015-08-19 | 2017-12-28 | 株式会社半導体エネルギー研究所 | 半導体装置の作製方法 |
CN110660866A (zh) * | 2018-06-28 | 2020-01-07 | 堺显示器制品株式会社 | 薄膜晶体管、显示装置和薄膜晶体管的制造方法 |
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KR20130024851A (ko) | 2013-03-08 |
US8803150B2 (en) | 2014-08-12 |
CN102969338A (zh) | 2013-03-13 |
TW201312241A (zh) | 2013-03-16 |
TWI474093B (zh) | 2015-02-21 |
CN102969338B (zh) | 2015-09-30 |
US20130048996A1 (en) | 2013-02-28 |
KR101364361B1 (ko) | 2014-02-18 |
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