JP2008218495A - 薄膜トランジスタおよびその製造方法 - Google Patents
薄膜トランジスタおよびその製造方法 Download PDFInfo
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- JP2008218495A JP2008218495A JP2007050004A JP2007050004A JP2008218495A JP 2008218495 A JP2008218495 A JP 2008218495A JP 2007050004 A JP2007050004 A JP 2007050004A JP 2007050004 A JP2007050004 A JP 2007050004A JP 2008218495 A JP2008218495 A JP 2008218495A
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- 239000010409 thin film Substances 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000010408 film Substances 0.000 claims abstract description 124
- 239000004065 semiconductor Substances 0.000 claims abstract description 61
- 230000001681 protective effect Effects 0.000 claims abstract description 44
- 239000000758 substrate Substances 0.000 claims description 40
- 239000007789 gas Substances 0.000 claims description 28
- 229910052760 oxygen Inorganic materials 0.000 claims description 18
- 238000004544 sputter deposition Methods 0.000 claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 15
- 239000001301 oxygen Substances 0.000 claims description 15
- 229910052733 gallium Inorganic materials 0.000 claims description 7
- 229910052725 zinc Inorganic materials 0.000 claims description 7
- 229910052738 indium Inorganic materials 0.000 claims description 6
- 230000005669 field effect Effects 0.000 abstract description 5
- 230000001590 oxidative effect Effects 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract 2
- 239000012212 insulator Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 60
- 238000000034 method Methods 0.000 description 37
- 230000015572 biosynthetic process Effects 0.000 description 20
- 238000000206 photolithography Methods 0.000 description 10
- 229910004298 SiO 2 Inorganic materials 0.000 description 8
- 229910007541 Zn O Inorganic materials 0.000 description 7
- 238000005401 electroluminescence Methods 0.000 description 7
- 238000005530 etching Methods 0.000 description 7
- 239000004973 liquid crystal related substance Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 230000036961 partial effect Effects 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- 239000010931 gold Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 238000001552 radio frequency sputter deposition Methods 0.000 description 5
- 210000002858 crystal cell Anatomy 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000007740 vapor deposition Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000002775 capsule Substances 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 3
- 229910021419 crystalline silicon Inorganic materials 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 108091006149 Electron carriers Proteins 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 239000012808 vapor phase Substances 0.000 description 2
- 229910005191 Ga 2 O 3 Inorganic materials 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 1
- 229910018068 Li 2 O Inorganic materials 0.000 description 1
- 229910017493 Nd 2 O 3 Inorganic materials 0.000 description 1
- 239000004988 Nematic liquid crystal Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005566 electron beam evaporation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical group [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/10—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions with semiconductor regions connected to an electrode not carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
- H01L29/1025—Channel region of field-effect devices
- H01L29/1029—Channel region of field-effect devices of field-effect transistors
- H01L29/1033—Channel region of field-effect devices of field-effect transistors with insulated gate, e.g. characterised by the length, the width, the geometric contour or the doping structure
- H01L29/105—Channel region of field-effect devices of field-effect transistors with insulated gate, e.g. characterised by the length, the width, the geometric contour or the doping structure with vertical doping variation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a 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
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Thin Film Transistor (AREA)
- Liquid Crystal (AREA)
Abstract
【解決手段】酸化物半導体層上に保護膜として酸化物絶縁体を形成する際に、酸化性ガスが含まれる雰囲気で成膜し、酸化物半導体の界面付近のキャリア密度を絶縁層側のキャリア密度より小さくする。また、酸化物半導体膜の設計膜厚を30nm±15nmにすることにより、電界効果移動度μ、On/Off比、S値を最適化する。
【選択図】図4
Description
本実施例では、図1に示すボトムゲート型(逆スタガ型)のTFTを作製した。図1は低抵抗n型結晶シリコンを基板101兼ゲート電極102、熱酸化シリコンをゲート絶縁膜103として用い、酸化物半導体104、保護膜105、ソース電極106、ドレイン電極107から構成されている。
本比較例では、実施例1において保護膜を形成する時の雰囲気がArガスの場合とガス流量比をAr:O2=90:10の場合でTFTを製作し、その特性を評価した。
本比較例では、実施例1において酸化物半導体の膜厚を10nm、30nm、50nmとし、それ以外の条件は実施例1と同じであるTFTを作製し、その伝達特性を評価した。
本実施例では、図4に示すボトムゲート型のTFTを作製した。
本実施例では、図4のTFTを用いた表示装置について説明する。
102 ゲート電極
103 ゲート絶縁膜
104 酸化物半導体
105 保護膜
106 ソース電極
107 ドレイン電極
201 基板
202 ゲート電極
203 ゲート絶縁膜
204 酸化物半導体A
205 酸化物半導体B
206 保護膜
207 ソース電極
208 ドレイン電極
401 基板
402 ゲート電極
403 ゲート絶縁層
404 チャネル層
405 保護膜
406 ソース電極
407 ドレイン電極
611 基体
612 ゲート電極
613 ゲート絶縁層
614 酸化物半導体膜
615 保護膜
616 ソース(ドレイン)電極
617 ドレイン(ソース)電極
618 電極
619 層間絶縁膜
620 発光層
621 電極
711 基体
712 ゲート電極
713 ゲート絶縁膜
714 酸化物半導体膜
715 保護膜
716 ソース(ドレイン)電極
717 ドレイン(ソース)電極
718 電極
719 層間絶縁膜
720 高抵抗層
721 液晶セルまたは電気泳動型粒子セル
722 高抵抗層
723 電極
Claims (6)
- 基板と、ゲート電極と、ゲート絶縁層と、酸化物半導体層と、ソース電極と、ドレイン電極と、保護膜とを、少なくとも有する薄膜トランジスタであって、
該酸化物半導体層は、InとGaとZnのうち少なくとも一つの元素を含むアモルファス酸化物であり、該酸化物半導体層のゲート電極側のキャリア密度は保護膜側のキャリア密度より大きく、かつ該酸化物半導体層の膜厚は30nm±15nmであることを特徴とする薄膜トランジスタ。 - 前記薄膜トランジスタは、ボトムゲート型であ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。
- 基板上にゲート電極を形成する工程と、ゲート絶縁層を形成する工程と、酸化物半導体層を形成する工程と、ソース電極およびドレイン電極を形成する工程と、保護膜を形成する工程と、を少なくとも有する薄膜トランジスタの製造方法であって、
該保護膜を形成する工程は、酸素含有雰囲気においてスパッタ法によってなされることを特徴とする薄膜トランジスタの製造方法。 - 前記酸素含有雰囲気とは、O2とArの混合ガスであ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の製造方法。
- 前記O2とArの混合ガスにおけるO2/Arの混合比は、20%以上50%以下であることを特徴とする請求項4に記載の薄膜トランジスタの製造方法。
- 薄膜トランジスタと、該薄膜トランジスタに電極を介して接続された表示素子と、から少なくともなる表示装置であって、
該薄膜トランジスタとして、請求項1または2に記載の薄膜トランジスタが用いられていることを特徴とする表示装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007050004A JP5121254B2 (ja) | 2007-02-28 | 2007-02-28 | 薄膜トランジスタおよび表示装置 |
PCT/JP2008/052597 WO2008105250A1 (en) | 2007-02-28 | 2008-02-08 | Thin-film transistor and method of manufacturing same |
US12/527,622 US9153703B2 (en) | 2007-02-28 | 2008-02-08 | Thin-film transistor and method of manufacturing same |
TW097105911A TWI377678B (en) | 2007-02-28 | 2008-02-20 | Thin-film transistor and method of manufacturing same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007050004A JP5121254B2 (ja) | 2007-02-28 | 2007-02-28 | 薄膜トランジスタおよび表示装置 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2012187567A Division JP5562384B2 (ja) | 2012-08-28 | 2012-08-28 | 薄膜トランジスタおよびその製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008218495A true JP2008218495A (ja) | 2008-09-18 |
JP5121254B2 JP5121254B2 (ja) | 2013-01-16 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007050004A Expired - Fee Related JP5121254B2 (ja) | 2007-02-28 | 2007-02-28 | 薄膜トランジスタおよび表示装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US9153703B2 (ja) |
JP (1) | JP5121254B2 (ja) |
TW (1) | TWI377678B (ja) |
WO (1) | WO2008105250A1 (ja) |
Cited By (56)
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JP2010021555A (ja) * | 2008-07-14 | 2010-01-28 | Samsung Electronics Co Ltd | トランジスタ |
JP2010161373A (ja) * | 2009-01-12 | 2010-07-22 | Samsung Mobile Display Co Ltd | 薄膜トランジスタ及びその製造方法、並びに薄膜トランジスタを備える平板表示装置 |
JP2010170108A (ja) * | 2008-12-25 | 2010-08-05 | Semiconductor Energy Lab Co Ltd | 半導体装置、およびその作製方法 |
JP2010170110A (ja) * | 2008-12-25 | 2010-08-05 | Semiconductor Energy Lab Co Ltd | 表示装置及びその作製方法 |
JP2010183027A (ja) * | 2009-02-09 | 2010-08-19 | Sony Corp | 薄膜トランジスタおよび表示装置 |
JP2010186860A (ja) * | 2009-02-12 | 2010-08-26 | Fujifilm Corp | 電界効果型トランジスタ及び電界効果型トランジスタの製造方法 |
JP2010226101A (ja) * | 2009-02-27 | 2010-10-07 | Semiconductor Energy Lab Co Ltd | 半導体装置及びその作製方法 |
JP2010239131A (ja) * | 2009-03-13 | 2010-10-21 | Semiconductor Energy Lab Co Ltd | 半導体装置およびその作製方法 |
WO2010125986A1 (en) * | 2009-05-01 | 2010-11-04 | Semiconductor Energy Laboratory Co., Ltd. | Method for manufacturing semiconductor device |
JP2010272715A (ja) * | 2009-05-22 | 2010-12-02 | Fujifilm Corp | 電界効果型トランジスタの製造方法、電界効果型トランジスタ、及び表示装置の製造方法 |
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WO2011036981A1 (en) * | 2009-09-24 | 2011-03-31 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device |
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US9865746B2 (en) | 2012-11-30 | 2018-01-09 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device |
US9324810B2 (en) | 2012-11-30 | 2016-04-26 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device including oxide semiconductor film |
US9224871B2 (en) | 2013-09-24 | 2015-12-29 | Kabushiki Kaisha Toshiba | Thin film transistor and method for manufacturing same |
JP2020077884A (ja) * | 2015-01-16 | 2020-05-21 | 株式会社半導体エネルギー研究所 | 記憶装置 |
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US9153703B2 (en) | 2015-10-06 |
US20100051937A1 (en) | 2010-03-04 |
WO2008105250A1 (en) | 2008-09-04 |
TW200845397A (en) | 2008-11-16 |
JP5121254B2 (ja) | 2013-01-16 |
TWI377678B (en) | 2012-11-21 |
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