WO2012159424A1 - 一种基于湿法腐蚀制备硅纳米线场效应晶体管的方法 - Google Patents
一种基于湿法腐蚀制备硅纳米线场效应晶体管的方法 Download PDFInfo
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- WO2012159424A1 WO2012159424A1 PCT/CN2011/082447 CN2011082447W WO2012159424A1 WO 2012159424 A1 WO2012159424 A1 WO 2012159424A1 CN 2011082447 W CN2011082447 W CN 2011082447W WO 2012159424 A1 WO2012159424 A1 WO 2012159424A1
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- WO
- WIPO (PCT)
- Prior art keywords
- silicon
- silicon oxide
- source
- drain
- etching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/031—Manufacture or treatment of FETs having insulated gates [IGFET] of thin-film transistors [TFT]
- H10D30/0321—Manufacture or treatment of FETs having insulated gates [IGFET] of thin-film transistors [TFT] comprising silicon, e.g. amorphous silicon or polysilicon
- H10D30/0323—Manufacture or treatment of FETs having insulated gates [IGFET] of thin-film transistors [TFT] comprising silicon, e.g. amorphous silicon or polysilicon comprising monocrystalline silicon
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/67—Thin-film transistors [TFT]
- H10D30/6729—Thin-film transistors [TFT] characterised by the electrodes
- H10D30/673—Thin-film transistors [TFT] characterised by the electrodes characterised by the shapes, relative sizes or dispositions of the gate electrodes
- H10D30/6735—Thin-film transistors [TFT] characterised by the electrodes characterised by the shapes, relative sizes or dispositions of the gate electrodes having gates fully surrounding the channels, e.g. gate-all-around
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/67—Thin-film transistors [TFT]
- H10D30/6757—Thin-film transistors [TFT] characterised by the structure of the channel, e.g. transverse or longitudinal shape or doping profile
Definitions
- the invention relates to a method for preparing a silicon nanowire field effect transistor by wet etching, and belongs to the technical field of ultra large scale integrated circuit manufacturing. Background technique
- Double Gate FETs FinFETs, Tri-Gate FETs, Gate-all-around (GAA) Nanowire (NW) FETs, etc.
- GAA Gate-all-around
- NW Nanowire
- the channel region does not need to be heavily doped like a conventional planar field effect transistor to suppress the short channel effect.
- the advantage of the lightly doped channel region is that the scattering is reduced. The mobility is reduced, so that the mobility of the multi-gate structure device is greatly improved.
- the one-dimensional nanowire field effect transistor has a one-dimensional quasi-ballistic transport effect, which further increases the mobility of the device. Therefore, as a new structural device, GAANW FET will be a potential alternative to traditional planar field effect transistors.
- the core process is to form a thin strip structure of source and drain and connection source and drain on the thinned silicon film through the silicon film thinning technology on the SOI substrate, and use the subsequent hydrogen annealing process and sacrificial oxidation process to reduce the control.
- the diameter of the silicon nanowires is finally increased by the source-drain lift technique.
- the main defects are as follows: (1) The SOI substrate requires more cost than the silicon substrate; (2) The source-drain lift technology is relatively complicated.
- the present invention proposes a problem in the preparation of the silicon nanowire field effect transistor.
- a method for preparing a silicon nanowire field effect transistor by wet etching The silicon nanowire field effect transistor can be easily formed on the bulk silicon wafer by this method, and the whole process is completely compatible with the conventional silicon-based ultra-large scale integrated circuit manufacturing technology, and the preparation process is simple, convenient, and short in cycle.
- the silicon nanowire field effect transistor prepared by the process can have a silicon nanowire channel diameter of about ten nanometers, and the full surrounding gate structure can provide good gate control capability, and is very suitable for preparing ultrashort trench devices. Further shrink the device size.
- the method produces a silicon nanowire field effect transistor with a small source-drain series resistance, which can achieve a higher turn-on current without additional source-drain lift process. Summary of the invention
- a method of fabricating a silicon nanowire field effect transistor includes the following steps: a) Thin strip-shaped graphic structure for preparing source and drain and connecting source and drain
- the main purpose of this step is to form a thin strip-like pattern structure of source and drain and connection source and drain on the hard mask by electron beam lithography.
- the width of the formed thin strip structure can be about 100 nm by electron beam lithography.
- the suspended fine lines are optimal.
- the addition of a hard mask layer is mainly to prevent the top from being corroded when wet etching silicon.
- V transferring the pattern structure on the hard mask to the silicon material by etching the silicon process
- the bottom tube suppresses ion implantation
- the main purpose of this step is to accurately control the corrosion rate of silicon by wet etching, and use different etching times according to different thin line widths to make the fine lines of silicon float and reach a small initial line width as much as possible. Subsequent sacrificial oxidation allows the silicon nanowires to have a diameter of about 10 nanometers.
- the main purpose of this step is to form a gate structure, in which the gate structure needs to be defined by electron beam lithography, mainly because electron beam lithography can easily control the gate line width to about 32 nm, which is the channel length we need. .
- the back wall process is completed before the source and drain ion implantation, and the thickness of the sidewall is controlled at about 20 nm.
- This design is mainly for the three problems of series resistance, parasitic capacitance and source-drain impurities due to lateral diffusion of annealing.
- the thickness of the smaller sidewalls makes the source-drain extension under the sidewalls smaller in series resistance, but increases the parasitic capacitance between the source and drain and the gate, and also makes the source-drain impurities more easily diffuse into the channel region, causing The risk of source and drain through.
- the main purpose of this step is to lead the source and drain terminals and the gate terminal to facilitate testing and formation of large-scale circuit structures.
- a silicon nanowire field effect transistor can be easily formed on a bulk silicon wafer, and the entire process flow is completely compatible with conventional silicon-based VLSI manufacturing technology, and the preparation process has the characteristics of simplicity, convenience, and short cycle.
- the silicon nanowire field effect transistor prepared by the process can have a silicon nanowire channel diameter of about ten nanometers, and the full surrounding gate structure can provide good gate control capability, and is very suitable for preparing ultrashort trench devices. Further shrink the device size.
- the silicon nanowire field effect transistor formed by the method has a small source-drain series resistance, and a high on-current can be obtained without additional source-drain lifting process.
- FIGS. 1-6 are schematic diagrams showing a process flow for preparing a silicon nanowire field effect transistor based on wet etching according to an embodiment of the present invention.
- a brief description of the process flow is as follows:
- Figure 1 defines the active region to form LOCOS isolation;
- Figure 2 shows the deposition of a silicon oxide film on the active region substrate as a hard mask;
- Figure 3A shows the electron beam lithography source and drain connections Thin strip-like graphic structure of source and drain, And the top view of the above pattern is transferred to the silicon substrate by the same-sex dry etching of the silicon oxide and the silicon substrate;
- FIG. 3B-3D is a cross-sectional view in the direction of AA, BB, CC in the structure of FIG.
- FIG. 3A; -3G is a cross-sectional view of the structure of Fig. 3 after wet etching of silicon in the direction of AA, BB, CC;
- Fig. 4A is a method of removing the silicon oxide film by wet etching, sacrificing oxidation, and removing the silicon oxide film by wet etching again.
- 4B-4D is a cross-sectional view in the AA, BB, CC direction of the structure of FIG. 4A;
- FIG. 5A is an electron beam lithography, after etching polysilicon, thereby forming a polysilicon gate thin line;
- FIG. 5B-5E is FIG. 5A A cross-sectional view in the AA, BB, CC, and DD directions of the structure;
- Fig. 6 is a structure in which a silicon oxide sidewall structure is formed.
- n-type silicon nanowire field effect transistor having a channel diameter of about 10 nm and a channel length of about 32 nm was prepared according to the following procedure:
- Optical lithography defines an active region
- Electron beam lithography defines a thin strip-like pattern structure of source and drain and connection source and drain, wherein the strip-shaped pattern structure has a width of 50 nm and a length of 300 nm;
- Thermal oxidation growth 500 A silicon oxide, as sacrificial oxidation, shrinks the suspended silicon thin lines connecting the source and drain to nanometer size to form silicon nanowires;
- Thermal oxidation growth 15 A silicon oxide, as a gate oxide layer;
- Electron beam lithography defines a fine line of gates with a width of 32 nm
- Source and sink ion implantation Note As, the implantation energy is 50keV, and the implantation dose is 4el5cm- 2 ;
Landscapes
- Thin Film Transistor (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112011104045T DE112011104045T5 (de) | 2011-05-26 | 2011-11-18 | Auf Nassätzen beruhendes Verfahren zur Herstellung von Silizium-Nanodraht-Feldeffekttransistoren |
| US13/511,123 US9034702B2 (en) | 2011-05-26 | 2011-11-18 | Method for fabricating silicon nanowire field effect transistor based on wet etching |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110138735.7A CN102315170B (zh) | 2011-05-26 | 2011-05-26 | 一种基于湿法腐蚀制备硅纳米线场效应晶体管的方法 |
| CN201110138735.7 | 2011-05-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012159424A1 true WO2012159424A1 (zh) | 2012-11-29 |
Family
ID=45428191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2011/082447 Ceased WO2012159424A1 (zh) | 2011-05-26 | 2011-11-18 | 一种基于湿法腐蚀制备硅纳米线场效应晶体管的方法 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9034702B2 (zh) |
| CN (1) | CN102315170B (zh) |
| DE (1) | DE112011104045T5 (zh) |
| WO (1) | WO2012159424A1 (zh) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2968776B1 (fr) * | 2010-12-13 | 2012-12-28 | Commissariat Energie Atomique | Procédé pour réaliser un guide optique a fente sur silicium |
| CN103258738B (zh) * | 2012-02-20 | 2016-02-17 | 中芯国际集成电路制造(上海)有限公司 | 超晶格纳米线场效应晶体管及其形成方法 |
| US8575009B2 (en) * | 2012-03-08 | 2013-11-05 | International Business Machines Corporation | Two-step hydrogen annealing process for creating uniform non-planar semiconductor devices at aggressive pitch |
| CN102623347B (zh) * | 2012-03-31 | 2014-10-22 | 上海华力微电子有限公司 | 基于体硅的三维阵列式SiNWFET制备方法 |
| CN102623321B (zh) * | 2012-03-31 | 2015-01-28 | 上海华力微电子有限公司 | 基于体硅的纵向堆叠式后栅型SiNWFET制备方法 |
| CN103378148B (zh) * | 2012-04-13 | 2016-02-03 | 中芯国际集成电路制造(上海)有限公司 | 半导体器件及其制造方法 |
| CN103377928B (zh) * | 2012-04-17 | 2015-12-16 | 中芯国际集成电路制造(上海)有限公司 | 半导体结构的形成方法、晶体管的形成方法 |
| CN103779182B (zh) * | 2012-10-25 | 2016-08-24 | 中芯国际集成电路制造(上海)有限公司 | 纳米线的制造方法 |
| CN103824759B (zh) * | 2014-03-17 | 2016-07-06 | 北京大学 | 一种制备多层超细硅线条的方法 |
| CN105185823A (zh) * | 2015-08-11 | 2015-12-23 | 中国科学院半导体研究所 | 一种围栅无结纳米线晶体管的制备方法 |
| CN106531630B (zh) * | 2015-09-09 | 2022-02-01 | 联华电子股份有限公司 | 半导体制作工艺、平面场效晶体管及鳍状场效晶体管 |
| US10236362B2 (en) | 2016-06-30 | 2019-03-19 | International Business Machines Corporation | Nanowire FET including nanowire channel spacers |
| CN106555207B (zh) * | 2016-11-16 | 2018-09-18 | 武汉理工大学 | 场效应电催化产氢器件的制备方法 |
| CN107039242B (zh) * | 2017-03-10 | 2019-12-31 | 武汉拓晶光电科技有限公司 | 一种核壳异质结构锗硅纳米线及其可控制备方法和应用 |
| CN111380929B (zh) * | 2018-12-27 | 2023-01-06 | 有研工程技术研究院有限公司 | 一种基于FinFET制造工艺的硅纳米线细胞传感器 |
| CN111435649B (zh) * | 2019-01-11 | 2023-12-01 | 中国科学院上海微系统与信息技术研究所 | 基于图形化soi衬底的半导体纳米线结构及其制备方法 |
| CN114620675B (zh) * | 2022-03-18 | 2024-06-04 | 北京航空航天大学 | 一种多维度图案化硅基纳米草制备方法及其应用 |
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| US6855606B2 (en) * | 2003-02-20 | 2005-02-15 | Taiwan Semiconductor Manufacturing Company, Ltd. | Semiconductor nano-rod devices |
| CN1801478A (zh) * | 2004-06-10 | 2006-07-12 | 台湾积体电路制造股份有限公司 | 半导体元件、半导体纳米线元件及其制作方法 |
| CN1855390A (zh) * | 2005-03-24 | 2006-11-01 | 三星电子株式会社 | 具有圆形形状的纳米线晶体管沟道的半导体器件及其制造方法 |
| US20080128760A1 (en) * | 2006-12-04 | 2008-06-05 | Electronics And Telecommunications Research Institute | Schottky barrier nanowire field effect transistor and method for fabricating the same |
| US20080246021A1 (en) * | 2006-10-04 | 2008-10-09 | Samsung Electronic Co., Ltd., | Single electron transistor and method of manufacturing the same |
| WO2009108173A2 (en) * | 2007-12-14 | 2009-09-03 | Nanosys, Inc. | Methods for formation of substrate elements |
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| JP3355083B2 (ja) * | 1996-03-13 | 2002-12-09 | シャープ株式会社 | 半導体装置の製造方法 |
| US20050048409A1 (en) * | 2003-08-29 | 2005-03-03 | Elqaq Deirdre H. | Method of making an optical device in silicon |
| CN100536113C (zh) * | 2007-04-27 | 2009-09-02 | 北京大学 | 一种体硅纳米线晶体管器件的制备方法 |
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2011
- 2011-05-26 CN CN201110138735.7A patent/CN102315170B/zh active Active
- 2011-11-18 US US13/511,123 patent/US9034702B2/en not_active Expired - Fee Related
- 2011-11-18 DE DE112011104045T patent/DE112011104045T5/de not_active Withdrawn
- 2011-11-18 WO PCT/CN2011/082447 patent/WO2012159424A1/zh not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6855606B2 (en) * | 2003-02-20 | 2005-02-15 | Taiwan Semiconductor Manufacturing Company, Ltd. | Semiconductor nano-rod devices |
| CN1801478A (zh) * | 2004-06-10 | 2006-07-12 | 台湾积体电路制造股份有限公司 | 半导体元件、半导体纳米线元件及其制作方法 |
| CN1855390A (zh) * | 2005-03-24 | 2006-11-01 | 三星电子株式会社 | 具有圆形形状的纳米线晶体管沟道的半导体器件及其制造方法 |
| US20080246021A1 (en) * | 2006-10-04 | 2008-10-09 | Samsung Electronic Co., Ltd., | Single electron transistor and method of manufacturing the same |
| US20080128760A1 (en) * | 2006-12-04 | 2008-06-05 | Electronics And Telecommunications Research Institute | Schottky barrier nanowire field effect transistor and method for fabricating the same |
| WO2009108173A2 (en) * | 2007-12-14 | 2009-09-03 | Nanosys, Inc. | Methods for formation of substrate elements |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102315170A (zh) | 2012-01-11 |
| US9034702B2 (en) | 2015-05-19 |
| CN102315170B (zh) | 2013-07-31 |
| US20120302027A1 (en) | 2012-11-29 |
| DE112011104045T5 (de) | 2013-09-12 |
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