JP2010050434A - 薄膜トランジスタ及びその製造方法 - Google Patents
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- 239000010409 thin film Substances 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 230000000087 stabilizing effect Effects 0.000 claims description 19
- 239000010408 film Substances 0.000 claims description 17
- 238000005530 etching Methods 0.000 claims description 13
- 239000004065 semiconductor Substances 0.000 claims description 11
- 238000000059 patterning Methods 0.000 claims description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910052738 indium Inorganic materials 0.000 claims description 4
- 239000011572 manganese Substances 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 108091006149 Electron carriers Proteins 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 238000005240 physical vapour deposition Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 229910052793 cadmium Inorganic materials 0.000 claims description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- 229910052733 gallium Inorganic materials 0.000 claims description 2
- 229910052732 germanium Inorganic materials 0.000 claims description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 2
- 229910052735 hafnium Inorganic materials 0.000 claims description 2
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 229910052763 palladium Inorganic materials 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 239000011574 phosphorus Substances 0.000 claims description 2
- 229910052707 ruthenium Inorganic materials 0.000 claims description 2
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 2
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 claims 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- -1 GdOx Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910017107 AlOx Inorganic materials 0.000 description 1
- 229910005535 GaOx Inorganic materials 0.000 description 1
- 229910002616 GeOx Inorganic materials 0.000 description 1
- 229910019092 Mg-O Inorganic materials 0.000 description 1
- 229910017947 MgOx Inorganic materials 0.000 description 1
- 229910019395 Mg—O Inorganic materials 0.000 description 1
- 229910004541 SiN Inorganic materials 0.000 description 1
- 229910020286 SiOxNy Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910002347 SrOx Inorganic materials 0.000 description 1
- 229910003070 TaOx Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910007541 Zn O Inorganic materials 0.000 description 1
- 229910003134 ZrOx Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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- 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
-
- G—PHYSICS
- G02—OPTICS
- 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
-
- 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
- H01L29/40—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 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
- H01L29/78606—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
- H01L29/78618—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
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- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Thin Film Transistor (AREA)
- Liquid Crystal (AREA)
- Electrodes Of Semiconductors (AREA)
Abstract
【解決手段】本発明の薄膜トランジスタは、ゲート電極と、活性層と、ソース及びドレイン電極とを備え、前記活性層は、一領域が前記ソース及びドレイン電極と接触し、前記ソース及びドレイン電極と接触する一領域の厚さが残りの領域の厚さより小さく形成される。
【選択図】図1
Description
RT=RCh+RC(単位はいずれも[Ohm])・・・(1)
RT=(RCh'/W)×L+RC・・・(2)
(但し、RCh及びRCの単位は[Ohm]、RCh'の単位は[Ohm/sq])
10 薄膜トランジスタ
12 ゲート電極
14 ゲート絶縁膜
16 活性層
18 ソース及びドレイン電極
Claims (16)
- ゲート電極と、
活性層と、
ソース及びドレイン電極とを備え、
前記活性層は、一領域が前記ソース及びドレイン電極と接触し、前記ソース及びドレイン電極と接触する一領域の厚さが残りの領域の厚さより小さく形成されることを特徴とする薄膜トランジスタ。 - 前記活性層の一領域の厚さは、残りの領域の厚さの10%〜90%に設定され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。
- 前記活性層は、酸化物半導体からな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。
- 前記活性層は、電子キャリア濃度が1018/cm3未満である非晶質酸化物からな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。
- 前記非晶質酸化物は、インジウム(In)、亜鉛(Zn)及び錫(Sn)のうちの少なくとも1つを含有した酸化物、又は、インジウム(In)、亜鉛(Zn)及びガリウム(Ga)を含有した酸化物、又は、リチウム(Li)、ナトリウム(Na)、マンガン(Mn)、ニッケル(Ni)、パラジウム(Pd)、銅(Cu)、カドミウム(Cd)、炭素(C)、窒素(N)、リン(P)、チタン(Ti)、ジルコニウム(Zr)、ハフニウム(Hf)、バナジウム(V)、ルテニウム(Ru)、ゲルマニウム(Ge)、錫(Sn)及びフッ素(F)のうちの少なくとも1つを含有した酸化物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。
- 前記薄膜トランジスタは、ボトムゲート構造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。
- 前記ソース及びドレイン電極は、前記活性層の一領域の上部に直接接触するように形成されたことを特徴とする請求項6に記載の薄膜トランジスタ。
- 前記ソース及びドレイン電極と接触する一領域を除いた前記活性層の残りの領域上に形成されたエッチング停止層を更に備え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。
- 前記活性層の下部面に形成され、前記活性層と同一であるか、或いは前記活性層より大きいバンドギャップを有する酸化物からなる界面安定化層を更に備え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段階と、
前記ゲート電極上にゲート絶縁膜を形成する段階と、
前記ゲート絶縁膜上に活性層を形成する段階と、
前記活性層上にそれぞれ前記活性層の一領域と接触するソース及びドレイン電極を形成する段階とを含み、
前記ソース及びドレイン電極と接触する前記活性層の一領域の厚さが残りの領域の厚さより小さくなるようにパターニングすることを特徴とする薄膜トランジスタの製造方法。 - 前記活性層を形成する段階は、前記ゲート絶縁膜上に酸化物半導体を成膜した後、ハーフトーンマスクを用いて前記活性層の一領域と残りの領域の厚さが異なるようにパターニングする段階を含むことを特徴とする請求項10に記載の薄膜トランジスタの製造方法。
- 前記活性層を形成する段階と前記ソース及びドレイン電極を形成する段階との間に、前記ソース及びドレイン電極と接触する一領域を除いた前記活性層の残りの領域上にエッチング停止層を形成する段階を更に含むことを特徴とする請求項10に記載の薄膜トランジスタの製造方法。
- 前記活性層を形成する段階では前記活性層を均一な厚さで形成し、
前記エッチング停止層を形成する段階で、前記エッチング停止層のパターニング時にオーバーエッチングを通じて前記活性層の一領域の上部を共にエッチングすることを特徴とする請求項12に記載の薄膜トランジスタの製造方法。 - 前記活性層の一領域の厚さが残りの領域の厚さより10%〜90%小さくなるようにパターニングすることを特徴とする請求項10に記載の薄膜トランジスタの製造方法。
- 前記ゲート絶縁膜を形成する段階と前記活性層を形成する段階との間に、前記活性層の下部面に備えられ、前記活性層と同一であるか、或いは前記活性層より大きいバンドギャップを有する酸化物からなる界面安定化層を形成する段階を更に含むことを特徴とする請求項10に記載の薄膜トランジスタの製造方法。
- 前記界面安定化層を物理蒸着方法で形成することを特徴とする請求項15に記載の薄膜トランジスタの製造方法。
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Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011114866A1 (en) * | 2010-03-17 | 2011-09-22 | Semiconductor Energy Laboratory Co., Ltd. | Memory device and semiconductor device |
JP2011187626A (ja) * | 2010-03-08 | 2011-09-22 | Sony Corp | 薄膜トランジスタおよび電子機器 |
JP2011228691A (ja) * | 2010-04-02 | 2011-11-10 | Semiconductor Energy Lab Co Ltd | 半導体装置 |
WO2011142467A1 (en) * | 2010-05-14 | 2011-11-17 | Semiconductor Energy Laboratory Co., Ltd. | Method for manufacturing semiconductor device |
JP2012038924A (ja) * | 2010-08-06 | 2012-02-23 | Sony Corp | 半導体装置、表示装置、および電子機器 |
JP2012038923A (ja) * | 2010-08-06 | 2012-02-23 | Sony Corp | 半導体装置、表示装置、および電子機器 |
KR20120064626A (ko) * | 2010-12-09 | 2012-06-19 | 엘지디스플레이 주식회사 | 산화물 절연막, 산화물 반도체 박막트랜지스터 소자 및 그 제조방법 |
JP2013033944A (ja) * | 2011-06-29 | 2013-02-14 | Semiconductor Energy Lab Co Ltd | 駆動回路、当該駆動回路の作製方法および当該駆動回路を用いた表示装置 |
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Also Published As
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CN101656270A (zh) | 2010-02-24 |
EP2157616A1 (en) | 2010-02-24 |
US8466462B2 (en) | 2013-06-18 |
JP2014013913A (ja) | 2014-01-23 |
KR20100023151A (ko) | 2010-03-04 |
US20100044699A1 (en) | 2010-02-25 |
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