KR101759255B1 - Method for inclined angle-controlled growth of nanostructure without catalyst - Google Patents
Method for inclined angle-controlled growth of nanostructure without catalyst Download PDFInfo
- Publication number
- KR101759255B1 KR101759255B1 KR1020150132182A KR20150132182A KR101759255B1 KR 101759255 B1 KR101759255 B1 KR 101759255B1 KR 1020150132182 A KR1020150132182 A KR 1020150132182A KR 20150132182 A KR20150132182 A KR 20150132182A KR 101759255 B1 KR101759255 B1 KR 101759255B1
- Authority
- KR
- South Korea
- Prior art keywords
- sapphire substrate
- thin film
- nanostructure
- film layer
- forming
- Prior art date
Links
- 239000002086 nanomaterial Substances 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims abstract description 92
- 239000003054 catalyst Substances 0.000 title claims description 19
- 239000000758 substrate Substances 0.000 claims abstract description 107
- 229910052594 sapphire Inorganic materials 0.000 claims abstract description 99
- 239000010980 sapphire Substances 0.000 claims abstract description 99
- 239000010409 thin film Substances 0.000 claims abstract description 64
- 150000001875 compounds Chemical class 0.000 claims abstract description 54
- 230000008569 process Effects 0.000 claims abstract description 35
- 238000005530 etching Methods 0.000 claims abstract description 23
- 238000000059 patterning Methods 0.000 claims abstract description 19
- 238000005121 nitriding Methods 0.000 claims abstract description 16
- 239000002073 nanorod Substances 0.000 claims description 3
- 230000003197 catalytic effect Effects 0.000 claims 1
- 239000002070 nanowire Substances 0.000 description 15
- 239000002184 metal Substances 0.000 description 12
- 239000013078 crystal Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 10
- 229920002120 photoresistant polymer Polymers 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 238000000151 deposition Methods 0.000 description 4
- -1 nanoneedles Substances 0.000 description 4
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- YBNMDCCMCLUHBL-UHFFFAOYSA-N (2,5-dioxopyrrolidin-1-yl) 4-pyren-1-ylbutanoate Chemical compound C=1C=C(C2=C34)C=CC3=CC=CC4=CC=C2C=1CCCC(=O)ON1C(=O)CCC1=O YBNMDCCMCLUHBL-UHFFFAOYSA-N 0.000 description 1
- 229910004613 CdTe Inorganic materials 0.000 description 1
- 229910005191 Ga 2 O 3 Inorganic materials 0.000 description 1
- 229910002601 GaN Inorganic materials 0.000 description 1
- 229910005540 GaP Inorganic materials 0.000 description 1
- 229910005542 GaSb Inorganic materials 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 229910000673 Indium arsenide Inorganic materials 0.000 description 1
- GPXJNWSHGFTCBW-UHFFFAOYSA-N Indium phosphide Chemical compound [In]#P GPXJNWSHGFTCBW-UHFFFAOYSA-N 0.000 description 1
- 229910010093 LiAlO Inorganic materials 0.000 description 1
- 229910020068 MgAl Inorganic materials 0.000 description 1
- 229910002665 PbTe Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910007709 ZnTe Inorganic materials 0.000 description 1
- 229910006501 ZrSiO Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- WPYVAWXEWQSOGY-UHFFFAOYSA-N indium antimonide Chemical compound [Sb]#[In] WPYVAWXEWQSOGY-UHFFFAOYSA-N 0.000 description 1
- RPQDHPTXJYYUPQ-UHFFFAOYSA-N indium arsenide Chemical compound [In]#[As] RPQDHPTXJYYUPQ-UHFFFAOYSA-N 0.000 description 1
- 238000007737 ion beam deposition Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002048 multi walled nanotube Substances 0.000 description 1
- 239000002127 nanobelt Substances 0.000 description 1
- 239000002121 nanofiber Substances 0.000 description 1
- 239000002061 nanopillar Substances 0.000 description 1
- 239000002074 nanoribbon Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002109 single walled nanotube Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- OCGWQDWYSQAFTO-UHFFFAOYSA-N tellanylidenelead Chemical compound [Pb]=[Te] OCGWQDWYSQAFTO-UHFFFAOYSA-N 0.000 description 1
- 238000007736 thin film deposition technique Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/02587—Structure
- H01L21/0259—Microstructure
- H01L21/02603—Nanowires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/033—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers
- H01L21/0334—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/0337—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane characterised by the process involved to create the mask, e.g. lift-off masks, sidewalls, or to modify the mask, e.g. pre-treatment, post-treatment
-
- 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
- H01L29/02—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
- H01L29/0657—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 characterised by the shape of the body
- H01L29/0665—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 characterised by the shape of the body the shape of the body defining a nanostructure
- H01L29/0669—Nanowires or nanotubes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Nanotechnology (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The present invention relates to a nanostructure growth method having an inclination angle in an uncatalyzed manner, and more particularly, to a nanostructure growth method in which a nanostructure is grown in a horizontal or inclined structure in a horizontal or inclined structure on an upper surface of a sapphire substrate or a compound thin film through a patterning and etching process, To a method of growing a structure.
The method for growing a nanostructure having an inclination angle according to the present invention includes forming a nanomask layer on an M-plane sapphire substrate; Selectively etching the M-plane sapphire substrate by etching the nanomask layer through a patterning process; Forming a multi-faceted structure of compound nuclei in the exposed portions of the M-plane sapphire substrate; And forming a nanostructure having a predetermined angle in the vertical direction from the surface of the M-plane sapphire substrate from the compound nucleus. Further, the method may further include nitriding the surface of the M-plane sapphire substrate with NH 3 gas to form an R-plane concavo-convex structure on the surface of the M-plane sapphire substrate before forming the nanomask layer, Discloses a structure growth method.
Description
The present invention relates to a method of growing a nanostructure having a variable inclination angle without catalyst, and more particularly, to a method of growing nanostructures having a variable or inclined structure in which the nanostructures are selectively and positively positioned on a sapphire substrate or a compound thin film by patterning and etching without using a metal catalyst. To a method for growing the same.
Nanotechnology is a field of nanomaterials, nanomaterials such as nanowires, nanobelt, nanoribbons and nanorods have been of greatest interest to researchers in recent years. Since these nanomaterials have excellent electrical, optical, mechanical and thermal properties, they can be used as a field effect transistor (FET), a light emitting diode (LED), a logic circuit, And so on. ≪ / RTI >
Nanotechnology, including nanowires, is rapidly expanding its research area, and now it is expanding its scope to almost all scientific fields such as physics, chemistry, biotechnology, and engineering. Especially, semiconductor nanowire is one of the most popular fields can do. Semiconductor nanowires can control size, interfacial properties, and electronic properties during the synthesis process, and a large amount of parallel assembly is possible using the thus synthesized nanowires. Therefore, semiconductor nanowires are recognized as the most reliable material for implementing nanodevices.
In the conventional technology for growing the substrate vertical semiconductor nanowire, the vapor growth method, the vapor-solid growth method, the electrochemical deposition method, the solution growth method Solution Growth, and SEG (epitaxial growth).
Among them, VLS (Vapor-Liquid-Solid) growth method was mainly used as a method of growing a nanowire. The VLS growth method adsorbs a reactant to a nano-cluster or a nano- It is a technology that grows in one dimension. Therefore, conventionally, a method of depositing a metal catalyst on a silicon substrate well grown with a single crystal and growing a nanowire using VLS growth method is mainly used. Korean Patent No. 10-2007-0087146 also uses a VLS method using a metal catalyst in an initial stage for growing nanowires.
However, the metal catalyst required for nanowire growth using VLS may contaminate the inside of the nanowire, thereby lowering the purity. As a result, the quality of the nanowire may be deteriorated. In addition to the growth of the nanowire, There is a problem that a process is required.
SUMMARY OF THE INVENTION The present invention has been made to overcome the above problems of the prior art, and it is an object of the present invention to simplify a process by using a metal catalyst instead of a metal catalyst in an initial stage of growing a nanostructure, And a method for manufacturing a high-quality nano structure by preventing contamination caused by the use of a metal catalyst.
In accordance with an aspect of the present invention, there is provided a method for growing a non-catalyst nanostructure,
Forming a nanomask layer on the M-plane sapphire substrate; Selectively etching the M-plane sapphire substrate by etching the nanomask layer through a patterning process; Forming a multi-faceted structure of compound nuclei in the exposed portions of the M-plane sapphire substrate; And forming a nanostructure having a predetermined angle in the vertical direction from the surface of the M-plane sapphire substrate based on the compound nucleus.
In addition, when the unit size of the portion where the nano-mask layer is etched and the M-plane sapphire substrate is exposed ranges from several nanometers to several micrometers, the predetermined angle may be the first angle range.
The method may further include nitriding the surface of the M-plane sapphire substrate with NH 3 gas to form an R-plane concave-convex structure on the surface of the M-plane sapphire substrate before forming the nanomask layer .
When the unit size of the exposed portion of the M-plane sapphire substrate is in the range of a few micrometers, the nanostructure may be formed in a horizontal direction with respect to the surface of the M-plane sapphire substrate have.
When the nano-mask layer is etched so that the unit size of the exposed portion of the M-plane sapphire substrate ranges from a few nanometers to a few hundred nanometers, the predetermined angle may be a second angle range.
In accordance with another aspect of the present invention, there is provided a method for growing a non-catalyst nanostructure,
Forming a GaN thin film layer on the M-plane sapphire substrate; Forming a nano-mask layer on the GaN thin film layer; Etching the nanomask layer through a patterning process to selectively expose the GaN thin film layer; Forming a multi-facetted compound nucleus in the exposed portion of the GaN thin film layer; And forming a nanostructure having a predetermined angle in the vertical direction from the surface of the GaN thin film layer from the compound nucleus.
Here, when the GaN thin film layer is semi-polar, the predetermined angle may be a first angle range.
In addition, when the GaN thin film layer is non-polar, the nanostructure may be formed in a horizontal direction with respect to the surface of the M-plane sapphire substrate.
The method may further include nitriding the surface of the M-plane sapphire substrate with NH 3 gas to form an R-plane concave-convex structure on the surface of the M-plane sapphire substrate before forming the GaN thin film layer If the GaN thin film layer is semi-polar, the predetermined angle may be a second angle range.
In accordance with another aspect of the present invention, there is provided a method for growing a non-catalyst nanostructure,
Forming a nano-mask layer on the R-plane sapphire substrate; Selectively etching the R-plane sapphire substrate by etching the nano-mask layer through a patterning process; Forming a multi-faceted structure of compound nuclei in exposed portions of the R-plane sapphire substrate; And forming a nanostructure from the compound nucleus in a horizontal direction with respect to the surface of the R-plane sapphire substrate.
According to the embodiment of the present invention, it is possible to prevent the pollution problem inside the nanostructure due to the metal catalyst used in the initial stage of nanostructure growth.
In addition, since the steps such as deposition, growth, and size control of the metal catalyst need not be performed, the process can be simplified and cost-effective.
BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
FIG. 1 illustrates a method of growing a nanostructure according to an embodiment of the present invention.
FIG. 2 illustrates a method of growing a nanostructure according to an embodiment of the present invention, which further includes a nitriding treatment step.
FIG. 3 illustrates a structure of a sapphire substrate surface nitrided according to an embodiment of the present invention.
4 is an SEM image of a nanostructure grown under different conditions according to an embodiment of the present invention.
5 shows a nanostructure formed in a horizontal direction with respect to the surface of an M-plane sapphire substrate.
FIG. 6 illustrates a method of growing a nanostructure according to another embodiment of the present invention.
FIG. 7 illustrates a method of growing a nanostructure according to another embodiment of the present invention, which further includes a nitriding treatment step.
8 shows a nanostructure formed in a horizontal direction with respect to the surface of the R-plane sapphire substrate.
FIG. 9 illustrates a method of applying nanostructures grown according to the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments will be described in detail below with reference to the accompanying drawings.
The following examples are provided to aid in a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, this is merely an example and the present invention is not limited thereto.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention or custom of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification. The terms used in the detailed description are intended only to describe embodiments of the invention and should in no way be limiting. Unless specifically stated otherwise, the singular form of a term includes plural forms of meaning. In this description, the expressions "comprising" or "comprising" are intended to indicate certain features, numbers, steps, operations, elements, parts or combinations thereof, Should not be construed to preclude the presence or possibility of other features, numbers, steps, operations, elements, portions or combinations thereof.
It is also to be understood that the terms first, second, etc. may be used to describe various components, but the components are not limited by the terms, and the terms may be used to distinguish one component from another .
Hereinafter, exemplary embodiments of a method of growing a nanostructure according to the present invention will be described in detail with reference to the accompanying drawings.
The term "nanostructure" as used throughout this specification refers to nanostructures, nanopillars, nanoneedles, nanorods, nanowires and nanotubes (e.g., single wall nanotubes, or (E.g., multi-wall nanotubes), and other structures of elongated similar dimensions, including, but not limited to, a variety of functionalized and derived fibril forms, such as threads, and nanofibers in the form of a fabric.
In addition, the nanostructure may have various cross-sectional shapes, for example, rectangular, polygonal, square, elliptical, or circular. Thus, the nanostructure may have a cylindrical and / or cone-shaped three-dimensional shape. In various embodiments, the plurality of nanostructures can be, for example, substantially parallel, arcuate, sinusoidal, etc. with respect to each other.
FIG. 1 illustrates a method of growing a nanostructure according to an embodiment of the present invention.
A method for growing a nanostructure according to an embodiment of the present invention includes forming a
First, in step S110, a nano-
The substrate for growing the
The
The nano-
In step S120, the
In the patterning process, a photoresist is coated on the surface of the nano-mask layer, a desired pattern is transferred to a coated photoresist using an exposure machine, and then developed with a developer to form a pattern . More specifically, a photoresist refers to a resin that causes a chemical change upon irradiation with light, and causes a change in dissolution, coagulation, or the like in response to light from the ultraviolet region to the visible light region. A negative type photoresist, a photosensitive resin in which a polymer solubilizes only a part irradiated with light, and a photoresist disappears, is called a positive type photoregister do.
The M-
In order to achieve the object of the present invention, the unit size of the exposed portion of the M-
In step S130, a
The
In the prior art, a metal catalyst is deposited and a nanostructure is grown therefrom using a Vapor-Liquid-Solid (VLS) method. However, in order to apply the nanostructure to a nano device, a high purity is required. However, since the metal catalyst is different from the nanostructure to be grown, there is a problem that the process of growing the metal catalyst and the process of growing the nanostructure have to be separately performed. However, in the present invention, The above problems can be solved by nuclear deposition and using it as a growth base of nanostructures.
In step S140, the
The
The compound forming the
Further, the group II-IV compound is a compound of the elemental compound containing CdSe, CdTe, ZnS, ZnSe and ZnTe, and the group III-V compound is an elemental compound thereof including GaN, GaP, GaAs, GaSb, InP, InAs and InSb. And the Group IV-VI compound may include these elemental compounds including PbS, PbSe, and PbTe, respectively. The metal oxide may include TiO 2 , ZnO, SiO 2 , SnO 2 , Wo 3 , ZrO 2 , HfO 2 , Ta 2 O 5 , BaTiO 2 , Y 2 O 3 and ZrSiO 4 .
Although it has been described that the
FIG. 2 illustrates a method of forming a
A step S210 of nitriding the surface of the M-
3, the surface of the M-
The nitridation treatment may be performed at a temperature of about 1000 to 1100 DEG C, a pressure of about 100 to 300 torr, and a duration of about 300 seconds, and H 2 may be used as the carrier gas. However, the present invention is not limited thereto, and can be carried out under various conditions depending on the kind of compound and the like.
The nitriding treatment refers to a processing method in which nitride is formed on the surface of a material to improve corrosion resistance, abrasion resistance, fatigue strength and the like. In the present invention, a gas nitridation method using NH 3 gas is used, but not always limited thereto, but a liquid nitridation method may be used.
Step S220 is a process of forming the nano-
In steps S231 and S232, the patterning and etching process is performed in the same manner as in step S120, but the unit size of the exposed portion of the M-
Step S240 is a process of forming a
In steps S251 and S252, the
If the same method as in step S231 is performed, the
4 is an SEM image of a nanostructure grown under different conditions according to an embodiment of the present invention.
4 (a) is an image of a nanostructure formed in a horizontal direction with respect to the M-plane sapphire substrate through steps S231 and S251 of FIG. 2. FIG.
4B is an image of a nanostructure formed in a second angle range from the M-plane sapphire substrate in a vertical direction through steps S232 and S252 of FIG. 2. FIG.
4C is an image of the nanostructure formed in the first angle range in the vertical direction from the M-plane sapphire substrate through the process described in FIG.
5 shows a nanostructure formed in a horizontal direction with respect to the surface of an M-plane sapphire substrate, the cross-section of which is a trapezoidal shape.
5 (a) schematically shows a nanostructure formed in a horizontal direction with respect to an M-
FIG. 6 illustrates a method of growing a nanostructure according to another embodiment of the present invention.
A method for growing a nanostructure according to another embodiment of the present invention includes forming a GaN
In step S610, a GaN
The shape and structure of the
When the crystal plane direction of the GaN
When the crystal plane direction of the GaN
Step S620 is a process of forming the nano-
In operation S630, the
In step S640, a
Step S651 and step S652 are the same as steps S251 and S252 for growing the
FIG. 7 illustrates a method of forming a
(S710) of nitriding the surface of the M-
In step S710, as the process of surface R- M- surface of
In step S720, a GaN
Steps S730 to S760 are the same as steps S620 to S652 (or S651), respectively, and thus detailed description thereof will be omitted. However, the
8 shows a nanostructure formed in a horizontal direction with respect to the surface of the R-plane sapphire substrate.
FIG. 8A is a schematic view of a nanostructure formed in a horizontal direction with respect to a sapphire substrate, and FIG. 8B is a SEM image of the nanostructure.
A method for forming a nano structure in a horizontal direction with respect to a surface of an R-plane sapphire substrate, comprising the steps of: forming a nano-mask layer on an R-plane sapphire substrate; etching the nano-mask layer through a patterning process, Forming a compound nucleus having a multi-faced structure on the exposed portion of the R-plane sapphire substrate, forming a nanostructure in a horizontal direction with respect to the surface of the R-plane sapphire substrate from the compound nucleus, And a method of forming a nanostructure using the above-described M-plane sapphire substrate. However, as can be seen from FIG. 8 (a) or FIG. 8 (b), the nanostructure can be grown in a triangular shape having a sharp top on its cross section.
FIG. 9 illustrates a method of applying nanostructures grown according to the present invention.
As shown in FIG. 9 (a) or FIG. 9 (b), the nanostructure grown according to the present invention may be formed on a high-quality semiconductor layer to be used for various optical devices or electronic devices.
Further, as shown in FIG. 9 (c), a nanostructure grown horizontally on the sapphire substrate or the GaN thin film layer according to the present invention may be used for manufacturing a transistor.
The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments described in the present invention are not intended to limit the technical spirit of the present invention but to illustrate the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the present invention.
11: M-plane sapphire substrate
12: GaN thin film layer
13: Nano mask layer
14: compound nuclei
15: a nanostructure formed at a first angle in the vertical direction from the substrate
151: a nano structure formed in a horizontal direction with respect to a substrate
152: nano structure formed at a second angle in the vertical direction from the substrate
Claims (11)
Forming a nanomask layer on the M-plane sapphire substrate;
Etching the nanomask layer through a patterning process to expose the M-plane sapphire substrate with a unit size ranging from 1 탆 to 10 탆;
Forming a multi-faceted structure of compound nuclei in the exposed portions of the M-plane sapphire substrate; And
Forming a nanostructure in a horizontal direction on the surface of the M-plane sapphire substrate based on the compound nucleus;
Wherein the cross-section of the nanostructure is a trapezoidal shape.
Forming a nanomask layer on the M-plane sapphire substrate;
Etching the nanomask layer through a patterning process to expose the M-plane sapphire substrate with a unit size ranging from 10 nm to 1000 nm;
Forming a multi-faceted structure of compound nuclei in the exposed portions of the M-plane sapphire substrate; And
Forming nanostructures in the vertical direction from 28 degrees to 35 degrees from the surface of the M-plane sapphire substrate based on the compound nuclei;
Wherein the shape of the nanostructure is nanorodic. ≪ RTI ID = 0.0 > 8. < / RTI >
Forming a nano-mask layer on the GaN thin film layer;
Etching the nanomask layer through a patterning process to selectively expose the GaN thin film layer;
Forming a multi-facetted compound nucleus in the exposed portion of the GaN thin film layer; And
Forming a nanostructure having a predetermined angle in the vertical direction from the surface of the GaN thin film layer from the compound nucleus;
Including,
Wherein the predetermined angle is in a range of 55 to 62 degrees when the GaN thin film layer is semi-polar and the temperature is maintained for 5 to 10 minutes after reaching a temperature of 900 to 1100 DEG C in the GaN thin film layer. Catalytic nanostructure growth method.
Forming a nano-mask layer on the GaN thin film layer;
Etching the nanomask layer through a patterning process to selectively expose the GaN thin film layer;
Forming a multi-facetted compound nucleus in the exposed portion of the GaN thin film layer; And
Forming a nanostructure having a predetermined angle in the vertical direction from the surface of the GaN thin film layer from the compound nucleus;
Including,
When the GaN thin film layer is non-polar,
Wherein the nanostructure is formed in a horizontal direction with respect to a surface of the M-plane sapphire substrate, the cross section of the nanostructure is in a trapezoidal shape, and the GaN thin film layer is formed when the temperature reaches 900 to 1100 ° C. Method for growing nanostructures.
Forming a nano-mask layer on the GaN thin film layer;
Etching the nanomask layer through a patterning process to selectively expose the GaN thin film layer;
Forming a multi-facetted compound nucleus in the exposed portion of the GaN thin film layer; And
Forming a nanostructure having a predetermined angle in the vertical direction from the surface of the GaN thin film layer from the compound nucleus;
The method of growing nanostructures according to claim 1,
The method comprises:
Further comprising the step of nitriding the surface of the M-plane sapphire substrate with NH 3 gas to form an R-plane concavo-convex structure on the surface of the M-plane sapphire substrate before forming the GaN thin film layer,
When the GaN thin film layer is semi-polar,
Wherein the predetermined angle is from 28 degrees to 35 degrees and the nanostructure is in the form of nanorods and the GaN thin film layer is formed by maintaining the temperature for 5 to 10 minutes after reaching a temperature of 900 to 1100 DEG C A method for growing a nanostructure without catalyst.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150132182A KR101759255B1 (en) | 2015-09-18 | 2015-09-18 | Method for inclined angle-controlled growth of nanostructure without catalyst |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150132182A KR101759255B1 (en) | 2015-09-18 | 2015-09-18 | Method for inclined angle-controlled growth of nanostructure without catalyst |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20170034027A KR20170034027A (en) | 2017-03-28 |
KR101759255B1 true KR101759255B1 (en) | 2017-07-18 |
Family
ID=58495728
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020150132182A KR101759255B1 (en) | 2015-09-18 | 2015-09-18 | Method for inclined angle-controlled growth of nanostructure without catalyst |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR101759255B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20230052015A (en) * | 2021-10-12 | 2023-04-19 | 성균관대학교산학협력단 | A space-free vertical field effect transistor comprising an active layer having vertically grown grains |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120068153A1 (en) * | 2010-09-14 | 2012-03-22 | Han Kyu Seong | Group iii nitride nanorod light emitting device and method of manufacturing thereof |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6452917B1 (en) | 1999-04-08 | 2002-09-17 | Qualcomm Incorporated | Channel estimation in a CDMA wireless communication system |
NZ579852A (en) | 2007-03-23 | 2012-03-30 | Novartis Ag | Use of a masked or coated copper salt for the treatment of macular degeneration |
-
2015
- 2015-09-18 KR KR1020150132182A patent/KR101759255B1/en active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120068153A1 (en) * | 2010-09-14 | 2012-03-22 | Han Kyu Seong | Group iii nitride nanorod light emitting device and method of manufacturing thereof |
Non-Patent Citations (2)
Title |
---|
C Tessarek et al., ‘Optical properties of vertical, tilted and in-plane GaN nanowires on different crystallographic orientations of sapphire’, J. Phys. D: App. Phys., Vol. 47 (2014) 394008(9pp).* |
Tongtong Zhu et al., ‘Unintentional doping in GaN’, Phys. Chem. Chem. Phys., Vol. 14 (2012) pp.9558-9573.* |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20230052015A (en) * | 2021-10-12 | 2023-04-19 | 성균관대학교산학협력단 | A space-free vertical field effect transistor comprising an active layer having vertically grown grains |
KR102580260B1 (en) * | 2021-10-12 | 2023-09-19 | 성균관대학교산학협력단 | A space-free vertical field effect transistor comprising an active layer having vertically grown grains |
Also Published As
Publication number | Publication date |
---|---|
KR20170034027A (en) | 2017-03-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR100972842B1 (en) | Nanodevice comprsising a nanorod and method for manufacturing the same | |
Nikoobakht et al. | Scalable synthesis and device integration of self-registered one-dimensional zinc oxide nanostructures and related materials | |
CN101443887B (en) | Pulsed growth of GAN nanowires and applications in group III nitride semiconductor substrate materials and devices | |
Kishino et al. | Selective-area growth of GaN nanocolumns on titanium-mask-patterned silicon (111) substrates by RF-plasma-assisted molecular-beam epitaxy | |
KR101002336B1 (en) | Nanodevice, transistor comprising the nanodevice, method for manufacturing the nanodevice, and method for manufacturing the transistor | |
KR101169307B1 (en) | Nanostructures and method of making the same | |
US20080083950A1 (en) | Fused nanocrystal thin film semiconductor and method | |
US9190565B2 (en) | Light emitting diode | |
KR101030531B1 (en) | Field emission device, field emission display device and methods for manufacturing the same | |
Chen et al. | GaN nanowire fabricated by selective wet-etching of GaN micro truncated-pyramid | |
Detz et al. | Lithography-free positioned GaAs nanowire growth with focused ion beam implantation of Ga | |
CA2890117A1 (en) | Nanometer sized structures grown by pulsed laser deposition | |
KR101759255B1 (en) | Method for inclined angle-controlled growth of nanostructure without catalyst | |
KR101309308B1 (en) | Electronic device and manufacturing method thereof | |
Tu et al. | Regularly-patterned nanorod light-emitting diode arrays grown with metalorganic vapor-phase epitaxy | |
TWI297959B (en) | ||
JP2010208925A (en) | Method for producing semiconductor nanowire, and semiconductor device | |
KR20130120848A (en) | Method for fabricating zno nanorod arrays grown laterally and unidirectionally | |
JP2012222274A (en) | Manufacturing method of nanopillar | |
US20140021444A1 (en) | Electronic device and manufacturing method thereof | |
Yoon et al. | Position-controlled selective growth of ZnO nanostructures and their heterostructures | |
Zou et al. | Assembly-line flash synthesis of ZnO nanobelts on metal Zn | |
KR20180040442A (en) | Photonic device and method of manufacturing thereof | |
JP2011124583A (en) | Nanostructure aggregate and method of forming nanostructure | |
KR101639978B1 (en) | Manufacturing Mehtod for polymer/nanowire compsite |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
AMND | Amendment | ||
E601 | Decision to refuse application | ||
AMND | Amendment | ||
X701 | Decision to grant (after re-examination) | ||
GRNT | Written decision to grant |