JP6078218B2 - 薄膜トランジスタ及びその製造方法 - Google Patents
薄膜トランジスタ及びその製造方法 Download PDFInfo
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- JP6078218B2 JP6078218B2 JP2011013856A JP2011013856A JP6078218B2 JP 6078218 B2 JP6078218 B2 JP 6078218B2 JP 2011013856 A JP2011013856 A JP 2011013856A JP 2011013856 A JP2011013856 A JP 2011013856A JP 6078218 B2 JP6078218 B2 JP 6078218B2
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- 238000004519 manufacturing process Methods 0.000 title description 13
- 239000010409 thin film Substances 0.000 title description 5
- 239000000758 substrate Substances 0.000 claims description 25
- 239000004065 semiconductor Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 16
- 239000004020 conductor Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 238000000059 patterning Methods 0.000 claims description 8
- 229910044991 metal oxide Inorganic materials 0.000 claims description 7
- 150000004706 metal oxides Chemical class 0.000 claims description 7
- 239000002041 carbon nanotube Substances 0.000 claims description 4
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 4
- 229910021389 graphene Inorganic materials 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 229920001940 conductive polymer Polymers 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 229910000765 intermetallic Inorganic materials 0.000 claims description 3
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 3
- 239000002800 charge carrier Substances 0.000 claims 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 238000004151 rapid thermal annealing Methods 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
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910002601 GaN Inorganic materials 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- WPYVAWXEWQSOGY-UHFFFAOYSA-N indium antimonide Chemical compound [Sb]#[In] WPYVAWXEWQSOGY-UHFFFAOYSA-N 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000307 polymer substrate Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L29/7869—Thin film transistors, i.e. transistors with a channel being at least partly a thin film having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L29/40—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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L29/78696—Thin film transistors, i.e. transistors with a channel being at least partly a thin film characterised by the structure of the channel, e.g. multichannel, transverse or longitudinal shape, length or width, doping structure, or the overlap or alignment between the channel and the gate, the source or the drain, or the contacting structure of the channel
Description
12、32 酸化層
13、33 ゲート
14、34 ゲート絶縁層
15、35 チャネル
16a、36a ソース
16b、36b ドレイン
17、37 フローティングチャネル
38 絶縁層
Claims (15)
- ソース及びドレインと、
前記ソースと前記ドレインとの間に形成されたチャネルと、
前記チャネル上部に、前記ソース及び前記ドレインと離隔して形成され、前記チャネルの長さよりも短い長さを有する、フローティングチャネルと、を備え、
前記フローティングチャネルの抵抗が前記チャネルのオン状態の抵抗よりも小さくなるように前記チャネルと前記フローティングチャネルとは互いに異なる物質から形成され、
前記フローティングチャネル上に形成された絶縁層をさらに備え、
前記ソースまたは前記ドレインのうち少なくとも一つは、前記絶縁層の端部及び前記チャネルの端部と接触する
ことを特徴とするTFT。 - 前記チャネルに対応するように基板上に形成されたゲートをさらに備える請求項1に記載のTFT。
- 前記ゲートと前記チャネルとの間に形成されたゲート絶縁層をさらに備える請求項2に記載のTFT。
- 前記フローティングチャネルと前記ソース及び前記ドレインとの間の離隔間隔は、前記絶縁層の厚さと同一である
ことを特徴とする請求項1に記載のTFT。 - ゲートと前記チャネルとの間に形成されたゲート絶縁層をさらに備える請求項1に記載のTFT。
- 前記チャネルは酸化物を含むことを特徴とする請求項1に記載のTFT。
- 前記フローティングチャネル、前記ソースと前記ドレインとは同じ伝導性物質で形成されたことを特徴とする請求項1に記載のTFT。
- 前記フローティングチャネルは、金属、金属合金、金属酸化物、金属間化合物、伝導性高分子、不純物がドーピングされた半導体、炭素ナノチューブ及びグラフェンからなるグループから選択されたいずれか一つまたは二つ以上の組み合わせで形成される物質で形成されたことを特徴とする請求項1に記載のTFT。
- ソース及びドレインと、
前記ソースと前記ドレインとの間に形成されたチャネルと、
前記チャネルに対応するように基板上に形成されたゲートと、
前記ゲートと前記チャネルとの間に形成されたゲート絶縁層と、
前記チャネルの上部に、前記ソース及び前記ドレインと離隔して形成され、前記チャネルの長さよりも短い長さを有する、フローティングチャネルと、を備え、
前記フローティングチャネル中の荷電キャリア移動度は前記チャネルのそれよりも大きく、
前記フローティングチャネル上に形成された絶縁層をさらに備え、
前記ソースまたは前記ドレインのうち少なくとも一つは、前記絶縁層の端部及び前記チャネルの端部と接触する
ことを特徴とするTFT。 - 前記フローティングチャネルと前記ソース及び前記ドレインとの間の離隔間隔は、前記絶縁層の厚さと同一である
ことを特徴とする請求項9に記載のTFT。 - 前記チャネルは酸化物を含むことを特徴とする請求項9に記載のTFT。
- 前記フローティングチャネル、前記ソースと前記ドレインとは同じ伝導性物質で形成されたことを特徴とする請求項9に記載のTFT。
- 前記フローティングチャネルの抵抗が前記チャネルのオン状態の抵抗より小さいことを特徴とする請求項9に記載のTFT。
- 基板上にゲート及びゲート絶縁層を形成する段階と、
前記ゲート絶縁層上にチャネルを形成する段階と、
前記ゲート絶縁層と前記チャネルとを覆うように導電層を形成する段階と、
前記チャネルの両側部とそれぞれ接触して形成されたソース及びドレインを形成し、
前記ソース及び前記ドレインと離隔して形成され、前記チャネルの長さよりも短い長さを有する、フローティングチャネルを形成する段階と、を含み、
前記フローティングチャネルの抵抗が前記チャネルのオン状態の抵抗よりも小さくなるように前記チャネルと前記フローティングチャネルとは互いに異なる物質から形成され、
前記ソース及びドレインと前記フローティングチャネルとの間に形成される絶縁層を形成する段階をさらに含み、
前記ソースまたは前記ドレインのうち少なくとも一つは、前記絶縁層の端部と接触する
ことを特徴とするTFTの製造方法。 - 前記フローティングチャネル、前記ソースと前記ドレインとは同じ伝導性物質で形成されて、同じパターニングプロセスを通じて形成されることを特徴とする請求項14に記載のTFTの製造方法。
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KR20100007078 | 2010-01-26 | ||
KR10-2010-0007078 | 2010-01-26 | ||
KR10-2011-0004535 | 2011-01-17 | ||
KR1020110004535A KR20110088390A (ko) | 2010-01-26 | 2011-01-17 | 박막 트랜지스터 및 그 제조 방법 |
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JP2011155263A JP2011155263A (ja) | 2011-08-11 |
JP6078218B2 true JP6078218B2 (ja) | 2017-02-08 |
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US (1) | US8395155B2 (ja) |
EP (1) | EP2348531B1 (ja) |
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CN (1) | CN102136499B (ja) |
Cited By (1)
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KR20190040804A (ko) * | 2017-10-11 | 2019-04-19 | 주식회사 엘지화학 | 산화물 반도체 조성물 및 이를 사용하여 제조한 산화물 박막 트랜지스터 |
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US8039842B2 (en) * | 2008-05-22 | 2011-10-18 | Semiconductor Energy Laboratory Co., Ltd. | Thin film transistor and display device including thin film transistor |
KR101643204B1 (ko) * | 2008-12-01 | 2016-07-27 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 반도체 장치 및 그 제작 방법 |
EP2445011B1 (en) * | 2009-06-18 | 2018-01-10 | Sharp Kabushiki Kaisha | Semiconductor device |
-
2011
- 2011-01-25 EP EP11152094.6A patent/EP2348531B1/en active Active
- 2011-01-26 CN CN201110031440.XA patent/CN102136499B/zh active Active
- 2011-01-26 JP JP2011013856A patent/JP6078218B2/ja active Active
- 2011-01-26 US US12/929,453 patent/US8395155B2/en active Active
Cited By (2)
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KR20190040804A (ko) * | 2017-10-11 | 2019-04-19 | 주식회사 엘지화학 | 산화물 반도체 조성물 및 이를 사용하여 제조한 산화물 박막 트랜지스터 |
KR102288336B1 (ko) | 2017-10-11 | 2021-08-09 | 주식회사 엘지화학 | 산화물 반도체 조성물 및 이를 사용하여 제조한 산화물 박막 트랜지스터 |
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EP2348531A2 (en) | 2011-07-27 |
CN102136499A (zh) | 2011-07-27 |
US20110180803A1 (en) | 2011-07-28 |
JP2011155263A (ja) | 2011-08-11 |
EP2348531A3 (en) | 2013-07-31 |
CN102136499B (zh) | 2016-02-10 |
EP2348531B1 (en) | 2021-05-26 |
US8395155B2 (en) | 2013-03-12 |
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