WO2004103893A1 - 微細構造体及びその製造方法 - Google Patents
微細構造体及びその製造方法 Download PDFInfo
- Publication number
- WO2004103893A1 WO2004103893A1 PCT/JP2004/006937 JP2004006937W WO2004103893A1 WO 2004103893 A1 WO2004103893 A1 WO 2004103893A1 JP 2004006937 W JP2004006937 W JP 2004006937W WO 2004103893 A1 WO2004103893 A1 WO 2004103893A1
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- WIPO (PCT)
- Prior art keywords
- microstructure
- metal
- film
- layer
- inorganic oxide
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B1/00—Devices without movable or flexible elements, e.g. microcapillary devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/01—Manufacture or treatment
- H10N30/08—Shaping or machining of piezoelectric or electrostrictive bodies
- H10N30/082—Shaping or machining of piezoelectric or electrostrictive bodies by etching, e.g. lithography
Definitions
- the present invention relates to a microstructure formed using a reactive ion etching method and a method for manufacturing the same.
- the microstructure of the present invention is a structure having a fine order in a very wide unit range from Angstroms to millimeters.
- the structure of the present invention is a unique structure which does not exist in the past, but as a means for forming a similar fine structure, a surface material is mainly represented by an electron beam lithography method or an etching method. Force by mechanical and physical cutting The structure was prepared separately and aligned on the surface of the substrate by a physical bonding method such as bonding or crimping. Although this structure is useful in many industrial production sites and research fields as shown in the present invention, it has been difficult to easily produce it.
- the stability is high because there are many unstable factors in the quality and reliability of the structure that has to be mechanically processed. It is also considered.
- an optical injection element of a near-field probe or an injection element that produces an oxide or metal columnar crystal and uses it for other functions has a cylindrical structure of about 10 lOOnm. Force to use objects All of these are mechanically processed by using both electron beam lithography and dry etching, so it is very difficult to control the processing shape and manufacture itself, and the selectivity of the shape is limited. It is said that there is.
- the present invention does not require a separate process for performing conventional mechanical or physical polishing or precision processing, or for arranging separately prepared microstructures on a substrate surface.
- a reaction occurs on the target object to generate and deposit a chemical reactant, and the deposit is self-organized to realize the growth of the structure. It is intended to provide a method for easily forming a chemically stable structure.
- At least two layers of a metal and an inorganic acid are laminated on a substrate made of an inorganic material or a polymer material by an appropriate method such as vapor deposition by a sputtering method or a multiple simultaneous sputtering method.
- a desired geometrical shape is formed on the laminated substrate by using a resist mask. After specifying an arbitrary structure such as a circle, rectangle, or two-dimensional lattice, by performing reactive ion etching, it is possible to obtain a hollow cylinder, hollow prism, or groove-like structure.
- the size provided by the mask may be submicron, micron, submillimeter and millimeter in size, but is not limited.
- the present inventors have caused a chemical reaction on an object to be grown, and a reaction product obtained by the reaction is caused to continuously cause a secondary chemical reaction, thereby producing a reaction product.
- a reaction product obtained by the reaction is caused to continuously cause a secondary chemical reaction, thereby producing a reaction product.
- the reaction between the etching gas and the processed substrate material in the dry etching process of the substrate is considered.
- the structure and state of the reaction product can be controlled.
- the temperature of the reaction product to be controlled is set to a temperature at which condensation starts, and the substrate is dry-etched, the etching gas or the reaction product is partially condensed, and this becomes a fine mask on the nanometer scale for etching. If fine processing on the nanometer scale becomes possible, and if an alignment mark or an etching photomask is formed on the substrate in advance, the condensation will occur around the alignment mark or the etching photomask. As a result, they found that microfabrication could be performed very advantageously, and based on this finding, completed the present invention.
- the condensation nucleus indicates a marking that induces condensation or specifies a condensation site when a reaction product condenses.
- the condensation start temperature of the reaction product varies depending on the material.
- the temperature is 200 ° C-250 ° C, which is the starting point of the atom transfer (migration action), and Pt is over 500 ° C. It becomes.
- the atom transfer start temperature can be defined as the condensation start temperature during the reactive ion etching process, and the time is the time for performing the reactive ion etching.
- the time for performing the reactive ion etching can be arbitrarily changed according to the growth state of the condensed nuclei, and the longer the time, the higher the height of the formed microstructure element itself.
- the temperature is specified by the metal applied to the microstructure element and the material of the inorganic oxide film, but the time differs depending on the aspect ratio.
- the time for performing this reactive ion etching is preferably 31 minutes.
- the method for producing a microstructure according to the present invention is directed to a multi-layer structure having at least two or more metal layers and inorganic oxide layers on a substrate made of an inorganic material or a polymer material.
- a multilayer which is an inorganic oxide layer
- form an alignment mark for the purpose of specifying the position on the uppermost layer, and perform a reactive ion etching step to change the shape of the alignment mark. It is characterized in that a reflected fine structure is generated.
- the multilayer under the alignment mark undergoes a reactive ion etching step, thereby causing a chemical reaction between the inorganic oxide layer and the metal layer,
- the object to be etched can be grown by causing self-organization by utilizing the migration action of metal atoms or ions in the metal layer and the self-organizing activity reaction. Thereby, a fine structure can be manufactured.
- the alignment mark is a mark for determining a position at which a fine structure is formed.
- a structure having a hollow portion therein is produced through the reactive ion etching step, and the structure is
- the shape can be made according to the shape of the alignment mark. For example, when the shape of the alignment mark is circular, the structure is cylindrical or conical, and when the shape of the alignment mark is square, the structure is prismatic or pyramidal. .
- the method for producing a microstructure according to the present invention is a multilayer structure having at least two layers of a metal layer and an inorganic oxide layer on a substrate made of an inorganic material or a polymer material.
- a multilayer, which is an inorganic oxide layer, is formed, a photomask for etching is formed on the uppermost layer to specify the position, and the shape of the photomask for etching is formed through a reactive ion etching process. It is characterized in that a reflected fine structure is generated.
- an etching photomask for specifying a position is formed on the multilayer, and the reactive ion etching step is performed.
- the reactive ion etching step causes a chemical reaction with the metal layer and the atoms or ions of the metal in the metal layer
- the object to be etched can be grown by inducing self-organization by utilizing the migration action and the dangling activation reaction of. Thereby, a fine structure can be manufactured.
- a structure having a hollow portion therein is produced through the reactive ion etching step, and the structure is It is possible to make the shape according to the pattern shape of the etching photomask.
- the pattern shape of the etching photomask is circular
- the structure is cylindrical or conical
- the pattern shape of the etching photomask is square
- the structure is prismatic or conical. It has a pyramid shape.
- the substrate or the metal layer and the inorganic oxide layer may react with the reactive ion etching step. It is preferable that the temperature be the temperature at which condensation of the reaction product by the ion etching step starts.
- the metal layer may be formed of Si, Al, Cu, Ni, Ti, Zr, Ta, Cr, W, Mo, V, Co, Zn, In, It is also possible to form one type of metal material film composed of one or more elements of Au, Ag, Pt, Ir, and Ru, or to select two or three types and sequentially form films. .
- one type of metal material film composed of one or more of Ti, Mo, Au, and Pt is formed, or two or three types are selected and sequentially formed.
- the inorganic oxide layer may be made of A10
- the microstructure according to the present invention comprises: a substrate made of an inorganic material or a polymer material;
- a plurality of layers formed on the substrate A plurality of layers formed on the substrate,
- a structure having a hollow portion inside formed on the multilayer, A microstructure comprising:
- the multilayer has at least two or more metal layers and inorganic oxide layers, and the uppermost layer is an inorganic oxide layer;
- the structure is characterized in that the multilayer is manufactured through a reactive ion etching process using an alignment mark or an etching photomask.
- the metal layer may be made of Si, Al, Cu, Ni, Ti, Zr, Ta, Cr, W, Mo, V, Co, Zn, In, Au, Ag. , Pt, Ir, Ru, one kind of metal material film composed of one or more elements, and ⁇ , two or three kinds, can be selected and sequentially formed.
- one kind of metal material film composed of one or more elements of Ti, Mo, Au, and Pt is formed, and in some cases, two or three kinds are selected and sequentially formed.
- the inorganic oxide layer may be made of A10, SiO 2, Ga
- a film having a material strength of any one of SiO and Al 0 or a composite oxide thereof is used.
- a film formed a film obtained by selecting two or three types of materials and sequentially forming a film made of each material, or a film formed by combining each material.
- microstructure thus obtained is provided to various industrial fields or research fields.
- the following is an application field in which the convenience is obtained by using the microstructure of the present invention, but even if it is not described, the properties which are easily inferred by using this structure are imparted.
- the uses belong to the invention.
- a method for manufacturing a piezoelectric element according to the present invention is characterized in that a piezoelectric film is added to a microstructure manufactured by the above-described method for manufacturing a microstructure. Further, a method of manufacturing a capacitor having various memory functions according to the present invention is characterized in that a piezoelectric film is added to the fine structure manufactured by the above-described method of manufacturing a fine structure.
- the piezoelectric element according to the present invention is characterized in that a piezoelectric film is added to the above-described microstructure. I do. Further, a capacitor having various memory functions according to the present invention is characterized in that a piezoelectric film is added to the aforementioned fine structure.
- a device element according to the present invention is characterized in that a heat dissipation function, a waste heat function or a heat conduction function is added to the above-described microstructure.
- a device using waste heat and heat dissipation or heat conduction characteristics such as a heat sink containing water or an organic material having a cooling function utilizing a hollow space, when a fine structure is arranged in parallel. Applicable to devices.
- a light-emitting element according to the present invention is characterized in that a function of applying a voltage to the above-described microstructure to emit electrons is added.
- a characteristic force produced on a metal substrate or a metal thin film can easily emit electrons by applying a voltage, and can be applied to an emitter device element having the characteristic.
- a light-emitting element according to the present invention is characterized in that a fluorescent material is filled in the above-described microstructure.
- the present invention can be applied to a light emitting device element manufactured by filling a fluorescent material into the inside utilizing a hollow structure.
- a method for manufacturing a light emitting device according to the present invention is characterized in that a fluorescent material is filled inside a microstructure manufactured by the above-described method for manufacturing a microstructure.
- the method for manufacturing a microreactor device element according to the present invention is characterized in that a catalyst having a controlled micro-size is manufactured by supporting a catalyst inside the microstructure manufactured by the above-described microstructure manufacturing method.
- a microreactor device element according to the present invention is characterized in that a catalyst is carried inside the above-mentioned microstructure to form a reaction furnace of a controlled minute size.
- a carbon nanotube Z carbon fiber production element according to the present invention is characterized in that a catalyst is supported inside the above-described microstructure.
- the optical element according to the present invention is characterized by using the light scattering or light diffraction characteristics of the surface of the fine structure described above. For example, as a result of fabricating a fine structure on the order of nanometers, a structure in the wavelength region of light is obtained, and the structure can be used for an optical element characterized by using light scattering or light diffraction characteristics of the surface. .
- light is focused by utilizing the hollow and through-hole shape of the microstructure.
- the present invention can also be applied to an optical probe element.
- An electric circuit device device is characterized by using the above-described microstructure. It can be used as a mounting method for electric circuits used for semiconductors and electronic components. Also, the present invention can be applied as a contact material for joining a solder material and the object to a printed circuit board or the like and a device element thereof.
- a semiconductor device is characterized in that the above-described fine structure is used as a trench structure for forming a circuit.
- Semiconductor devices with a trench structure that can lower the on-resistance by digging a trench on a Si substrate are widely known powers.Conventionally, avalanche withstand capability has been sacrificed and trench formation is difficult, so transistor circuits
- planar technology for forming a smooth surface on the Si wafer surface was widely used.
- the shape of the microstructure of the present invention can be controlled arbitrarily, and furthermore, since it is hollow and easy to provide a through-hole, forming the structure of the present invention on a Si substrate has two dimensions. Has enabled the formation of trenches and the formation of circuit elements having a three-dimensional structure, and their application to semiconductor devices.
- This capacitance element corresponds to a conventional trench capacitance element.
- an inorganic oxide film is formed on a Si substrate, an etching mask is formed on the inorganic oxide film, and the etching mask is used as a mask.
- the inorganic oxide film is etched by a reactive ion etching method. As a result, a microstructure having a hollow inside, for example, a cylindrical structure is formed.
- a first conductive film is filled inside the cylindrical structure, and a second conductive film is formed outside the cylindrical structure.
- a capacitive element including the first conductive film, the cylindrical structure, and the second conductive film can be formed.
- a biochip device is characterized by using the microstructure described above.
- this microstructure can be used as a container as it is, and can be used as a biochip device for DNA, RNA, protein and the like.
- microarray device uses the fine structure described above.
- a metal bump element for mounting a semiconductor element according to the present invention is characterized by using the above-mentioned fine structure. Further, a substrate with a semiconductor element according to the present invention is characterized in that a semiconductor element is bonded using the metal bump element.
- a reactive ion etching step is performed to form a fine layer reflecting the shape of the alignment mark.
- a structure can be created. Therefore, it is possible to provide a fine structure having a hollow portion therein and a method for manufacturing the same.
- SiO is mainly contained on a substrate.
- SiO composite oxidation containing 0.1% or more and 50% or less by weight
- the thickness of the composite oxide material film is preferably about 50 to 200 nm!
- the substrate may be an inorganic or polymeric material, a substrate having a metal layer on its surface, or a multilayer having at least two layers of a metal layer and an inorganic oxide layer. Substrates having multiple layers in which the upper layer is an inorganic oxide layer are included.
- the substrate may be a substrate in which a single layer or a plurality of layers of a conductive layer or an insulating layer are laminated on a substrate such as a Si wafer or a glass substrate which is a strong substrate such as a Si wafer or a glass substrate. included.
- the step of forming the etching photomask or the alignment mark is performed by applying and exposing a resist film on the SiO composite oxide material film and developing the resist film. Forming an etching mask that also has a resist pattern power on the SiO composite oxide material film
- the etching step may include any one of CF, CHF, CF, and CF.
- the method for manufacturing a microstructure it is possible to form a structure having a hollow portion inside which is hard to be formed by a conventional microfabrication technique using photolithography technology or etching technology. .
- the microstructure manufactured by the above manufacturing method is a structure having a hollow portion inside, and has an external shape of a cone, a pyramid, a cylinder, a prism, and optionally a cylinder or prism. It is possible to control.
- the fine structure preferably has a width of about 100-1 m and a height of about 100-20 m. In the case of a cylindrical microstructure, the diameter is preferably about 50 to 20 m.
- the hollow portion is opened near the top of the microstructure, and the microstructure may be made of a composite material containing Au or Ag as a main component.
- FIGS. 1A and 1B are cross-sectional views illustrating a method for manufacturing a microstructure according to an embodiment of the present invention.
- FIG. 2 is an enlarged photograph of the microstructure shown in FIG. 1 (B).
- a substrate 11 is prepared.
- a Si wafer or a glass substrate can be used.
- an underlying metal laminated film 12 is formed on the substrate 11.
- the metal laminated film 12 is a laminated film formed by laminating Ti and Au by RF magnetron sputtering in order from the lower layer.
- SiO was used as a main component by RF magnetron sputtering.
- a Si target is used as a sputtering target, and sputtering is performed by reacting Si and O in an O-reactive atmosphere. like this
- the SiO composite oxide material film 13 is formed on the metal laminated film 12.
- the SiO composite oxide material film 13 is formed.
- the elements are not limited to silicon nitride.
- the content of the additive silicon nitride is variously changed.
- a resist pattern 14 is formed on the SiO composite oxide material film 13.
- the resist pattern 14 is formed by arranging a plurality of circular patterns having a diameter of about 500 nm at equal intervals, and the distance between the circular patterns is about 500 nm.
- the SiO composite oxide material film 13 is reacted with the resist pattern 14 as a mask.
- Etching is performed by an etching method.
- the etching conditions at this time are mainly CF gas.
- the mixed gas described above is used as an etching gas, and the reaction is performed for about 20 minutes in an atmosphere where the flow rate of the input gas is 50 sccm, the input electric power is 00 W, and the degree of vacuum is 0.1 Torr.
- FIG. 1B A photograph of this structure is shown in FIG.
- the structure 15 has a conical outer shape and has a hollow portion 15a therein, and the hollow portion 15a is open near a vertex of the structure. Therefore, the structure 15 itself has a structure penetrating through the hollow portion 15a.
- the structure 15 is made of a composite material film containing Au.
- the size of the structure 15 is about 3 ⁇ in height and about 2 ⁇ in diameter.
- a hollow portion 15a is provided inside as described above.
- the structure 15 is formed when the active gas and the inert gas, or a composite gas thereof, activates the surface state of the metal when the metal is etched by the reactive ion etching.
- the secondary reaction of the active gas can be caused by laminating the element to be etched with another specific metal during the reaction of the surface, and the metal that has caused the secondary reaction It is considered that the reason for this is that the deposited particles become chemically activated and the suspended sediment particles combine to cause a growth reaction.
- the Au layer composed of the above forms a reaction product by forming a chemical interaction, and the reaction product condenses and grows by self-organization. As a result, it is considered that a fine structure was formed.
- the SiO composite oxide material film 13 is used as the uppermost layer.
- Main component is SiO.
- SiO composite material film containing 0.1% to 50% by weight of oxides of at least one of O and GeO or nitrides such as TaN, TiN, and Si3N4.
- the resist pattern 14 was formed on the SiO composite oxide material film 13.
- etching gas a mixed gas of CF gas and O gas was used as the etching gas.
- the present invention is not limited to the above-described embodiment, and can be variously modified and implemented without departing from the gist of the present invention.
- the pattern shape of the resist pattern 14 to a rectangle, as shown in FIG. 3A, the inside is hollow, the bottom is about 1 ⁇ m ⁇ 2 / ⁇ , and the height is about 2.5 m.
- a rectangular column-shaped fine structure can be manufactured.
- a prismatic shape with a hollow interior, a bottom of about 1mX1m and a height of about 2.5m Can be manufactured.
- etching conditions such as the etching time
- a cylindrical microstructure having a hollow interior, a diameter of about 1 m and a height of about 2. can be manufactured as shown in FIG.
- microstructure according to the present invention can be applied to forces that can be applied to various uses, for example, the following uses.
- the present invention can be applied to a piezoelectric element manufactured by adding a piezoelectric film to the above-described microstructure or a capacitive element having various memory functions.
- a device element manufactured by adding a heat dissipation function, a waste heat function or a heat conduction function to the above-described microstructure, a surface area increased when a fine structure is arranged in parallel, and a hollow structure is utilized.
- the present invention can be applied to a device element using waste heat and heat dissipation or heat conduction characteristics such as a heat sink containing water or an organic material having a cooling function.
- the present invention can be applied to a light emitting element in which a fluorescent material is filled inside the above-described microstructure, and a light emitting device element manufactured by filling a fluorescent material inside using a hollow structure.
- the present invention can be applied to a microreactor device element for producing a reactor having a controlled minute size by supporting a catalyst inside a microstructure manufactured by the above-described method for manufacturing a microstructure.
- the present invention can be applied to the above-described carbon nanotube Z carbon fiber producing element in which a catalyst is supported inside the fine structure.
- the present invention can be applied to an optical probe element characterized in that light is focused by utilizing the shape of a hollow and a through hole of a microstructure.
- the present invention can be applied to an electric circuit mounted device element using the above-described microstructure, and can be used as a method of mounting an electric circuit used in a semiconductor or an electronic component.
- the present invention is also applied to a contact material for joining a solder material and the object to a printed circuit board or the like and a device element thereof.
- the present invention can be applied to a semiconductor element using the above-described fine structure as a trench structure for forming a circuit.
- the present invention can be applied to a Noo chip device using the above-described fine structure.
- the microstructure can be used as it is as a container, and can be used as a biochip device for DNA, RNA, protein, and the like.
- the present invention can be applied to a metal bump element for mounting a semiconductor element using the above-described fine structure. Further, the present invention can be applied to a substrate with a semiconductor element in which at least one semiconductor element is bonded using the metal bump element.
- an inorganic oxide film is formed on a Si substrate, an etching mask is formed on the inorganic oxide film, and the inorganic oxide film is etched by a reactive ion etching method using the etching mask as a mask.
- the inside is a hollow microstructure, for example, a cylindrical shape A structure is formed.
- a first conductive film is filled inside the cylindrical structure, and a second conductive film is formed outside the cylindrical structure.
- a capacitive element including the first conductive film, the cylindrical structure, and the second conductive film can be formed.
- the shape and aspect can be arbitrarily designed and manufactured on a substrate.
- the capacitive element can be formed using both sides (inside and outside) of the wall surface of the groove, a three-dimensional capacitive element structure can be realized.
- the plug electrode can also be formed three-dimensionally. Under these circumstances, it is possible to realize a semiconductor memory having three-dimensional plugs and capacitor cells, and to apply design rules that utilize large-scale and efficient substrates. Will come to life.
- FIGS. 1A and 1B are cross-sectional views illustrating a method for manufacturing a microstructure according to an embodiment of the present invention.
- FIG. 2 is an enlarged photograph of the microstructure shown in FIG. 1 (B).
- FIG. 3 (A) is an enlarged photograph of a microstructure according to a modification of the embodiment according to the present invention
- FIG. 3 (B) is an enlarged photograph of a microstructure according to another modification. It is.
- FIG. 4 is a photograph showing a fine structure according to another modification of the example according to the present invention. Explanation of reference numerals
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JP2005506363A JPWO2004103893A1 (ja) | 2003-05-22 | 2004-05-21 | 微細構造体及びその製造方法 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101249981B1 (ko) | 2010-06-29 | 2013-04-05 | 한국과학기술원 | 3차원 나노구조체 및 그 제조방법 |
KR101356800B1 (ko) | 2011-11-21 | 2014-01-28 | 한국과학기술원 | 연속적으로 패턴화된 구조를 가지는 3차원 다성분 나노구조체 및 그 제조방법 |
US10727233B2 (en) | 2017-10-20 | 2020-07-28 | Samsung Electronics Co., Ltd. | Integrated circuit devices and methods of fabricating the same |
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JP2000216161A (ja) * | 1999-01-25 | 2000-08-04 | Nec Corp | 無機反射防止膜を使った配線形成方法 |
JP2002144300A (ja) * | 2000-07-27 | 2002-05-21 | Toshiba Tec Corp | パイプジョイント及びその作製方法並びにそれを用いた流体デバイス |
JP2003053699A (ja) * | 2001-08-10 | 2003-02-26 | Nikon Corp | ピンホール製造方法及び測定装置 |
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2004
- 2004-05-21 JP JP2005506363A patent/JPWO2004103893A1/ja active Pending
- 2004-05-21 WO PCT/JP2004/006937 patent/WO2004103893A1/ja active Application Filing
Patent Citations (3)
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JP2000216161A (ja) * | 1999-01-25 | 2000-08-04 | Nec Corp | 無機反射防止膜を使った配線形成方法 |
JP2002144300A (ja) * | 2000-07-27 | 2002-05-21 | Toshiba Tec Corp | パイプジョイント及びその作製方法並びにそれを用いた流体デバイス |
JP2003053699A (ja) * | 2001-08-10 | 2003-02-26 | Nikon Corp | ピンホール製造方法及び測定装置 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101249981B1 (ko) | 2010-06-29 | 2013-04-05 | 한국과학기술원 | 3차원 나노구조체 및 그 제조방법 |
KR101356800B1 (ko) | 2011-11-21 | 2014-01-28 | 한국과학기술원 | 연속적으로 패턴화된 구조를 가지는 3차원 다성분 나노구조체 및 그 제조방법 |
US10727233B2 (en) | 2017-10-20 | 2020-07-28 | Samsung Electronics Co., Ltd. | Integrated circuit devices and methods of fabricating the same |
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JPWO2004103893A1 (ja) | 2006-07-20 |
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