WO2023219400A1 - 반도체 소자의 전극 형성 방법 및 반도체 소자의 전극 - Google Patents
반도체 소자의 전극 형성 방법 및 반도체 소자의 전극 Download PDFInfo
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- WO2023219400A1 WO2023219400A1 PCT/KR2023/006303 KR2023006303W WO2023219400A1 WO 2023219400 A1 WO2023219400 A1 WO 2023219400A1 KR 2023006303 W KR2023006303 W KR 2023006303W WO 2023219400 A1 WO2023219400 A1 WO 2023219400A1
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- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/40—Formation of materials, e.g. in the shape of layers or pillars of conductive or resistive materials
- H10P14/42—Formation of materials, e.g. in the shape of layers or pillars of conductive or resistive materials using a gas or vapour
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- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/02—Pretreatment of the material to be coated
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- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/06—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/40—Oxides
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/56—After-treatment
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/01—Manufacture or treatment
- H10D64/011—Manufacture or treatment of electrodes ohmically coupled to a semiconductor
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- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/40—Formation of materials, e.g. in the shape of layers or pillars of conductive or resistive materials
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/40—Formation of materials, e.g. in the shape of layers or pillars of conductive or resistive materials
- H10P14/42—Formation of materials, e.g. in the shape of layers or pillars of conductive or resistive materials using a gas or vapour
- H10P14/43—Chemical deposition, e.g. chemical vapour deposition [CVD]
- H10P14/432—Chemical deposition, e.g. chemical vapour deposition [CVD] using selective deposition
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- H10P95/00—Generic processes or apparatus for manufacture or treatments not covered by the other groups of this subclass
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- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
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- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W20/00—Interconnections in chips, wafers or substrates
- H10W20/01—Manufacture or treatment
- H10W20/031—Manufacture or treatment of conductive parts of the interconnections
- H10W20/032—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers
- H10W20/042—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers the barrier, adhesion or liner layers being seed or nucleation layers
- H10W20/045—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers the barrier, adhesion or liner layers being seed or nucleation layers for deposition from the gaseous phase, e.g. for chemical vapour deposition [CVD]
Definitions
- the present invention relates to a method of forming an electrode of a semiconductor device, and more specifically, to a method of forming an electrode of a semiconductor device that can improve characteristics and to an electrode of a semiconductor device.
- Electrodes of semiconductor devices they are formed by spraying a precursor containing a metal and depositing it on a substrate.
- the precursor used to form an electrode contains at least one ligand among carbon (C), oxygen (O), and hydrogen (H).
- these ligands act as impurities that increase the resistance of the electrode, thereby deteriorating the electrical properties of the semiconductor device.
- the etching gas may be a gas containing a halogen element.
- Elements such as fluorine (F) or chlorine (Cl), which are representative halogen elements, can react with the surface of silicon or a silicon-containing film.
- Silicon or silicon-containing films can be etched when exposed to deposition gases.
- the gas for depositing these thin films contains halogen elements such as fluorine or chlorine, halogen elements such as fluorine or chlorine are used during the formation of the thin film.
- the lower layer of silicon or silicon-containing layer may be unintentionally etched.
- the silicon or silicon-containing film is etched by halogen elements contained in the deposition gas during the deposition process, the surface of the etched silicon or silicon-containing film is damaged and the surface of the film becomes irregular.
- the upper film formed on the lower film with an irregular surface may have defects at the interface between the lower film and the upper film, which may also have a negative effect on the formation of the upper film.
- a barrier film can be formed for the purpose of preventing damage to the lower film.
- a titanium nitride (TiN) film can be formed as a barrier film on silicon or a silicon-containing film.
- the titanium nitride film prevents halogen elements generated when forming electrodes, which are metal films formed later, from damaging the underlying silicon or silicon-containing film, but the reaction gas for forming the titanium nitride film also contains halogen elements. It can be included.
- titanium tetrachloride TiCl 4
- TiCl 4 titanium tetrachloride
- the titanium nitride film which is a barrier film formed between the silicon or silicon-containing film and the electrode, may damage the underlying silicon or silicon-containing film during the formation process, and the surface of the silicon or silicon-containing film may become irregular.
- the titanium nitride film When an electrode is formed on a titanium nitride film, which is a barrier film, the titanium nitride film may be damaged by the halogen element contained in the deposition gas forming the electrode. Even if damage to the lower silicon or silicon-containing film is reduced, the titanium nitride film itself, which is a barrier film, may be damaged, causing cracks to occur in the titanium nitride film or damaging the titanium nitride film itself.
- the present invention provides a method of forming an electrode for a semiconductor device that can lower the resistance of the electrode.
- the present invention provides a method of forming electrodes of a semiconductor device capable of removing impurities.
- the present invention provides a method of forming an electrode of a semiconductor device and an electrode of a semiconductor device to reduce damage to the underlying film that occurs in the process of forming an electrode.
- a method of forming electrodes for a semiconductor device includes preparing a substrate; Spraying a precursor containing a low-resistance metal element onto the substrate; It may include forming a low-resistance metal thin film layer by spraying a gas containing hydrogen (H) or oxygen (O) on the substrate.
- the steps of spraying the precursor and forming a low-resistance metal thin film layer may be sequentially performed multiple times.
- removing impurities adsorbed on the substrate by exposing the substrate to a first plasma after spraying the precursor; And after forming the low-resistance metal thin film layer, exposing the low-resistance metal thin film layer to a second plasma to remove impurities; including, spraying the precursor, exposing the low-resistance metal thin film layer to the first plasma,
- the step of exposing to the second plasma can be performed sequentially multiple times.
- the low-resistance metal element may include at least one of molybdenum (Mo), ruthenium (Ru), and copper (Cu).
- the first plasma may be formed as a plasma containing hydrogen (H) or a plasma containing oxygen (O).
- the second plasma may be formed as a plasma containing hydrogen (H) or a plasma containing oxygen (O).
- TiN thin film layer It further includes forming a TiN thin film layer on the substrate, wherein forming the TiN thin film layer includes spraying a source containing titanium (Ti) on the substrate; and spraying a gas containing nitrogen (N) on the substrate, including spraying a precursor containing the low-resistance metal element, forming a low-resistance metal thin film layer, and forming the TiN thin film layer.
- forming the TiN thin film layer includes spraying a source containing titanium (Ti) on the substrate; and spraying a gas containing nitrogen (N) on the substrate, including spraying a precursor containing the low-resistance metal element, forming a low-resistance metal thin film layer, and forming the TiN thin film layer.
- the steps can be performed sequentially multiple times.
- a substrate with a TiN thin film layer formed on the upper surface can be prepared.
- a method of forming electrodes for a semiconductor device includes preparing a substrate; forming a first low-resistance metal thin film layer by spraying a source containing a first low-resistance metal element and spraying a gas containing hydrogen (H) or oxygen (O); and forming a second low-resistance metal thin film layer by spraying a source containing a second low-resistance metal element and spraying a gas containing hydrogen (H) or oxygen (O).
- the steps of forming a resistive metal thin film layer and forming a second low-resistance metal thin film layer may be sequentially performed multiple times.
- the first low-resistance metal element and the second low-resistance metal element may include at least one of molybdenum (Mo), ruthenium (Ru), and copper (Cu).
- the first low-resistance metal element and the second low-resistance metal element may include the same metal element.
- At least one of the first low-resistance metal element and the second low-resistance metal element may include at least two of molybdenum (Mo), ruthenium (Ru), and copper (Cu).
- the steps of forming a resistive metal thin film layer and forming a TiN thin film layer may be sequentially repeated.
- a substrate with a TiN thin film layer formed on the upper surface can be prepared.
- a method of forming electrodes for a semiconductor device includes preparing a substrate; Spraying a liquid precursor containing a low-resistance metal element onto the substrate; It may include forming a low-resistance metal thin film layer by spraying a gas containing hydrogen (H) or oxygen (O) on the substrate.
- the steps of spraying the precursor and forming a low-resistance metal thin film layer may be sequentially performed multiple times.
- the low-resistance metal element may include at least one of molybdenum (Mo), ruthenium (Ru), and copper (Cu).
- An embodiment of the present invention provides a method for forming an electrode of a semiconductor device, comprising: forming a ruthenium film or a ruthenium-containing film on silicon or a silicon-containing film; It may include forming a tungsten-containing film on the ruthenium film or ruthenium-containing film.
- ruthenium film or ruthenium-containing film may be desirable to form to a thickness of 5 ⁇ to 50 ⁇ .
- the electrode may preferably be any one of a memory device electrode, a word line, a bit line, a transistor electrode, a GaN semiconductor electrode, or a GaAs semiconductor electrode.
- a method of forming an electrode for a semiconductor device includes removing oxides or impurities from the surface of the silicon or silicon-containing film before forming the ruthenium film or ruthenium-containing film; may include.
- the electrode of the semiconductor device includes silicon or a silicon-containing film; A ruthenium film or ruthenium-containing film formed on the silicon or silicon-containing film; and a tungsten-containing film formed on the ruthenium film or the ruthenium-containing film.
- ruthenium film or ruthenium-containing film may be desirable to form to a thickness of 5 ⁇ to 50 ⁇ .
- the electrode may be any one of a memory device electrode, a word line, a bit line, or a transistor electrode.
- a reducing gas is sprayed after a precursor containing a low-resistance metal element is sprayed.
- hydrogen plasma or oxygen plasma is generated before and after spraying the reducing gas.
- an electrode with low resistance can be prepared.
- a barrier layer and an electrode can be formed to reduce damage to the lower layer.
- Figure 1 is a diagram showing a state in which an electrode according to a first embodiment of the present invention is formed on a substrate.
- Figure 2 is a conceptual diagram for explaining a method of forming an electrode by the method according to the first embodiment of the present invention.
- Figure 3 is a process diagram conceptually showing a method of forming an electrode by the method according to the first embodiment of the present invention.
- Figure 4 is a diagram showing a state in which an electrode according to a second embodiment of the present invention is formed on a substrate.
- Figure 5 is a conceptual diagram illustrating a method of forming an electrode by a method according to a second embodiment of the present invention.
- Figure 6 is a diagram showing a state in which an electrode according to a first modification of the first embodiment is formed on a substrate.
- Figure 7 is a diagram showing a state in which an electrode according to a second modification of the first embodiment is formed on a substrate.
- Figure 8 is a diagram schematically showing the structure of a semiconductor device according to a third embodiment of the present invention.
- FIGS. 9 to 11 are diagrams exemplarily showing a method of forming a semiconductor device according to a third embodiment of the present invention.
- Embodiments of the present invention relate to a method of forming an electrode of a semiconductor device, and more specifically, to a method of forming an electrode of a semiconductor device with improved electrical characteristics. More specifically, embodiments of the present invention relate to a method of forming electrodes of a semiconductor device, including a method of forming a low-resistance metal thin film layer.
- the semiconductor device may be a NAND flash
- the electrode may be a gate electrode of the NAND flash.
- the electrode formed by the method according to the embodiments is not limited to the gate electrode and may be various components that require conductivity, for example, a word line of NAND flash.
- the electrode formed by the method according to the embodiments is not limited to NAND flash, and can be applied to thin films that require conductivity in various semiconductor devices.
- Figure 1 is a diagram showing a state in which an electrode according to a first embodiment of the present invention is formed on a substrate.
- the electrode 100 may be formed on the substrate S.
- the substrate S may be a wafer, and may be any one of a Si wafer, a GaAs wafer, and a SiGe wafer.
- the electrode 100 may be formed using a low-resistance metal element.
- the low-resistance metal element may include at least one of molybdenum (Mo), ruthenium (Ru), and copper (Cu).
- the electrode may be a thin film formed using at least one of molybdenum (Mo), ruthenium (Ru), and copper (Cu), or a thin film containing at least one of molybdenum (Mo), ruthenium (Ru), and copper (Cu). there is.
- FIGS. 1 to 3 a method of forming an electrode on a substrate according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
- Figure 2 is a conceptual diagram for explaining a method of forming an electrode by the method according to the first embodiment of the present invention.
- Figure 3 is a process diagram conceptually showing a method of forming an electrode by the method according to the first embodiment of the present invention.
- 'on' may mean spraying raw materials for deposition or generating plasma
- 'off' may mean stopping or ending spraying of raw materials or not generating plasma
- the method of forming the electrode 100 includes a process of spraying a precursor containing a low-resistance metal element (precursor injection process) and a reduction process containing hydrogen (H) or oxygen (O). It may include a process of forming a low-resistance metal thin film layer 110 on the substrate S by spraying gas (reducing gas injection process).
- the method of forming the electrode 100 includes a process of generating plasma using a gas containing hydrogen (H) or oxygen (O) after the precursor injection process (first plasma generation process) and a reducing gas injection process.
- a process of removing impurities from the low-resistance metal thin film layer 110 by generating plasma (hereinafter referred to as second plasma) using a gas containing hydrogen (H) or oxygen (O) (second plasma generation process) It may further include.
- the method of forming the electrode 100 includes a process of spraying a purge gas between the precursor injection process and the first plasma generation process (first purge process), and a purge gas between the reducing gas injection process and the second plasma generation process.
- first purge process a purge gas between the precursor injection process and the first plasma generation process
- second purge process a purge gas between the reducing gas injection process and the second plasma generation process.
- the method of forming the electrode 100 includes a precursor injection process, a purge gas injection process (first purge process), a first plasma generation process, a reducing gas injection process, and a purge gas injection process (second purge process). process) and a second plasma generation process.
- the 'precursor injection process - first plasma generation process - first purge process - reducing gas injection process - second plasma generation process - second purge process' as described above is used to form the low-resistance metal thin film layer 110.
- This can be done with one process cycle (CY).
- the above-described process cycle (CY) is repeated multiple times to deposit or stack a plurality of low-resistance metal thin film layers 110 as shown in FIG. 1. Accordingly, an electrode in which a plurality of low-resistance metal thin film layers 110 are stacked or an electrode 100 of a semiconductor device including a plurality of low-resistance metal thin film layers 110 is formed.
- the number of repetitions of the process cycle (CY) may be adjusted according to the target thickness of the electrode 100 to be formed.
- each low-resistance metal thin film layer 110 is shown separately in order to distinguish thin film layers formed by a plurality of process cycles (CY). However, the plurality of stacked low-resistance metal thin film layers 110 may be integrated.
- a precursor containing a low-resistance metal element is sprayed into the chamber where the substrate S is loaded. That is, a material containing a low-resistance metal element is used as a precursor.
- the low-resistance metal element may be at least one of molybdenum (Mo), ruthenium (Ru), and copper (Cu).
- the precursor containing a low-resistance metal element may be a precursor containing at least one of molybdenum (Mo), ruthenium (Ru), and copper (Cu).
- the 'precursor containing a low-resistance metal element' may be named 'the source containing a low-resistance metal element'.
- molybdenum for example, a material containing at least one of molybdenum hexacarbonyl and molybdenum pentachloride may be used.
- ruthenium for example, a material containing ethylcyclopentadienyl ruthenium ((EtCp) 2 Ru) (Bis(ethylcyclopentadienyl)ruthenium) may be used.
- a precursor containing copper (Cu) for example, an organometallic compound may be used, or a material containing F or Cl may be used. More specific examples include precursor sources containing copper (Cu), which are organometallic compounds, such as Cu(II)-2,2,6,6-tetramethyl-3,5-heptandionate [Cu(thd) 2 ] and Cu(II). A material containing at least one of hexafluoroacetylacetonate [Cu(hfac) 2 ] can be used.
- a material containing at least one of CuCl 1 , CuCl 2 , CuF 1 , CuF 2 , CuBr 1 , CuBr 2 , CuI 1 or CuI 2 may be used.
- the precursor containing at least one of molybdenum (Mo), ruthenium (Ru), and copper (Cu) may be in a solid phase or a liquid phase. Accordingly, before injection, the solid or liquid precursor is heated to convert it into gas, and then the gaseous precursor is injected onto the substrate (S). When the precursor is sprayed toward the substrate (S), the precursor or a low-resistance metal element contained in the precursor is adsorbed to the substrate (S), and an adsorption layer 111 is formed on the substrate (S) as shown in (a) of FIG. 3. ) is formed. That is, an adsorption layer 111 or a thin film containing at least one metal among molybdenum (Mo), ruthenium (Ru), and copper (Cu) is formed.
- a purge gas is sprayed into the chamber to purge it (first purge).
- Ar gas can be used as the purge gas.
- a precursor containing at least one of molybdenum (Mo), ruthenium (Ru), and copper (Cu) may contain at least one ligand (C), oxygen (O), and hydrogen (H) depending on the type of the material.
- ligand may be included. That is, oxygen (C), oxygen (O), and hydrogen (H) act as impurities when spraying a precursor containing at least one low-resistance metal element among molybdenum (Mo), ruthenium (Ru), and copper (Cu). At least one ligand may be adsorbed. And these ligands act as impurities that lower the electrical characteristics of the electrode 100, for example, increase resistance.
- a reducing gas containing oxygen (0) or hydrogen (O) is sprayed to remove impurities resulting from the precursor.
- hydrogen plasma or oxygen plasma is generated after the injection of the precursor and after the injection of the reducing gas to remove impurities resulting from the precursor.
- the first plasma generation process is a step for removing impurities from the adsorption layer 111, and may be performed after the injection of the precursor is completed. More specifically, when the precursor injection is completed, a gas for plasma generation is sprayed inside the chamber or toward the substrate S, and power for plasma generation is supplied. At this time, for example, RF (Radio Frequency) power is applied to at least one of the chamber, the susceptor on which the substrate S is seated inside the chamber, and the injection unit that sprays gas into the chamber. Additionally, the gas for generating plasma may be, for example, a gas containing hydrogen (H) or a gas containing oxygen (O).
- H hydrogen
- O oxygen
- the gas containing hydrogen (H) may be H 2 gas
- the gas containing oxygen (O) may be O 2 gas.
- RF power is applied and gas containing hydrogen (H) or oxygen (O) is sprayed, plasma containing hydrogen or plasma containing oxygen can be generated inside the chamber. That is, hydrogen plasma or oxygen plasma can be generated. Accordingly, the substrate S or the substrate S on which the adsorption layer 111 is formed is exposed to the first plasma.
- the generated hydrogen plasma or oxygen plasma reacts with the adsorption layer 111 adsorbed on the substrate to remove at least one of carbon (C), oxygen (O), and hydrogen (H) from the adsorption layer 111. That is, at least one ligand of carbon (C), oxygen (O), and hydrogen (H) originating from the precursor is contained in the adsorption layer 111, and when hydrogen plasma or oxygen plasma reacts with the adsorption layer 111, The ligand falls off from the adsorption layer 111. That is, the ligand bond of at least one of carbon (C), oxygen (O), and hydrogen (H) contained in the precursor of the adsorption layer 111 is broken by hydrogen plasma or oxygen plasma and falls out of the adsorption layer 111. .
- At least one ligand impurity among carbon (C), oxygen (O), and hydrogen (H) is removed from the adsorption layer 111 by plasma. Accordingly, the content of at least one ligand impurity of carbon (C), oxygen (O), and hydrogen (H) contained in the adsorption layer 111 may be reduced or removed.
- the reducing gas injection process is performed after the first plasma generation process is completed, and the reducing gas is sprayed toward the substrate (S) loaded inside the chamber.
- a gas containing hydrogen (H) or oxygen (O) is used as the reducing gas.
- H 2 gas or O 2 gas may be used as the reducing gas.
- the adsorption layer 111 (FIG. 3(a)) formed by spraying a precursor onto the substrate S, and the adsorption exposed to the reducing gas by spraying a reducing gas onto the substrate S on which the adsorption layer 111 is formed.
- the reducing gas is injected onto the substrate (S) on which the adsorption layer 111 is formed, and the adsorption layer 111 or the reducing gas is exposed to the reducing gas.
- the adsorption layer 111 reacted with is called 'low resistance metal thin film layer 110' or 'metal thin film layer 110'.
- metal thin film layer 110 When the reducing gas is sprayed toward the substrate S, a low-resistance metal thin film layer 110 (hereinafter referred to as metal thin film layer 110) is formed as shown in (c) of FIG. 3. That is, a metal thin film layer 110 containing at least one of molybdenum (Mo), ruthenium (Ru), and copper (Cu) is formed.
- Mo molybdenum
- Ru ruthenium
- Cu copper
- hydrogen (H) or oxygen (O) contained in the reducing gas is at least one of carbon (C), oxygen (O), and hydrogen (H) remaining in the adsorption layer 111 or the metal thin film layer 110.
- Remove ligand impurities That is, at least one ligand impurity among carbon (C), oxygen (O), and hydrogen (H) that was not removed during the first plasma generation process may remain in the adsorption layer 111.
- These ligand impurities can be further removed by hydrogen (H) or oxygen (O) sprayed during the reducing gas injection process.
- At least one of the ligands may be removed by breaking the bond. Accordingly, the content of at least one ligand impurity of carbon (C), oxygen (O), and hydrogen (H) contained in the metal thin film layer 110 may be reduced or removed.
- the flow rate of the reducing gas injected in this reducing gas injection process may be injected in a larger amount compared to the gas injected in the first plasma generation process described above and the second plasma generation process described later. That is, with respect to the injection flow rate of gas containing hydrogen (H) or oxygen (O), it is preferable to adjust the flow rate injected during the reducing gas injection process to be greater than the flow rate injected in the first and second plasma generation processes. do. Therefore, from the perspective of impurity removal, a relatively large amount of impurities can be removed during the reducing gas injection process compared to the first and second plasma generation processes.
- the flow rate of the gas containing hydrogen (H) or oxygen (O) injected during the reducing gas injection process is higher than that of the gas injected during the first and second plasma generation processes, but the flow rate does not oxidize the metal of the precursor. It may be such a small amount that it is not noticeable.
- the reducing gas as described above may be called a gas for removing impurities.
- purge gas is sprayed into the chamber to purge it (secondary purge).
- the same gas as in the first purge can be used, for example, Ar gas can be used as the purge gas.
- impurities are removed from the metal thin film layer 110 by spraying a reducing gas, but some impurities may remain in the metal thin film layer 110.
- oxygen plasma or hydrogen plasma is generated (second plasma generation) to further remove impurities.
- the second plasma generation process is a step to further remove impurities from the metal thin film layer 110, and may be performed after the reduction gas injection is completed. More specifically, it may be performed after the secondary purge is completed.
- the second plasma can be generated or generated in the same manner as the first plasma generation process described above. That is, a gas for generating plasma containing hydrogen (H) or oxygen (O) is sprayed toward the substrate S, and RF power is applied. Accordingly, hydrogen plasma or oxygen plasma is generated inside the chamber (see (d) of FIG. 3). Accordingly, the metal thin film layer 110 is exposed to the second plasma.
- the generated hydrogen plasma or oxygen plasma reacts with the metal thin film layer 110 formed or deposited on the substrate S. And at least one ligand impurity among carbon (C), oxygen (O), and hydrogen (H) originating from the precursor is separated from the metal thin film layer 110 by reaction with the plasma. In other words, at least one ligand impurity among carbon (C), oxygen (O), and hydrogen (H) escapes from the metal thin film layer 110. Accordingly, the content of at least one ligand impurity of carbon (C), oxygen (O), and hydrogen (H) contained in the metal thin film layer 110 may be reduced or removed.
- the process cycle (CY) including the 'precursor injection process - first purge process - first plasma generation process - reducing gas injection process - second purge process - second plasma generation process' as described above is repeated multiple times. and implement it. Accordingly, as shown in FIG. 1, a plurality of metal thin film layers 110 are stacked on the substrate S, thereby forming an electrode 100 of a predetermined thickness.
- the reducing gas is sprayed after the first plasma generation process is completed.
- a process of spraying a purge gas may be further performed between the first plasma generation process and the reducing gas injection process.
- the deposition device in which the 'precursor injection process, first purge process, first plasma generation process, reducing gas injection process, second purge process, and second plasma generation process' as described above is performed is directed to the precursor or gas in the lateral direction of the substrate. It may be a deposition device that sprays from . That is, the deposition device can spray a precursor or gas toward the chamber, a susceptor installed inside the chamber so that the substrate (S) can be seated on top, and the substrate (S) seated on the susceptor from a side direction of the susceptor. It may include an injection unit installed on the side wall of the chamber.
- the deposition apparatus may include a power supply unit that applies power for generating plasma, such as RF power, to at least one of the chamber, the susceptor, and the spray unit. And when using this deposition device, precursors or gases are injected from the side of the substrate S and flow toward the substrate.
- a power supply unit that applies power for generating plasma, such as RF power, to at least one of the chamber, the susceptor, and the spray unit.
- the electrode 100 is formed using a deposition device in which an injection unit is installed on the side of the susceptor and sprays a precursor or gas in the side direction of the substrate (S).
- the injection unit is not limited to this and may be installed on the upper wall of the chamber to be located above the susceptor. Using this deposition device, precursors or gases can be injected from the upper side of the substrate S.
- Figure 4 is a diagram showing a state in which an electrode according to a second embodiment of the present invention is formed on a substrate.
- Figure 5 is a conceptual diagram illustrating a method of forming an electrode by a method according to a second embodiment of the present invention.
- the electrode 100 may include a first metal thin film layer 110a and a second metal thin film layer 110b, and the first metal thin film layer 110a and the second metal thin film layer (110b) may be stacked alternately.
- each of the first and second metal thin film layers 110a and 110b may be a layer containing a low resistance metal element. That is, each of the first and second metal thin film layers 110a and 110b may be a layer containing at least one of molybdenum (Mo), ruthenium (Ru), and copper (Cu).
- first metal thin film layer 110a and the second metal thin film layer 110b are layers containing different low-resistance metal elements among molybdenum (Mo), ruthenium (Ru), and copper (Cu), or the same low-resistance metal element. It may be a layer containing.
- each of the first and second metal thin film layers 110a and 110b may be named ‘first low-resistance metal thin film layer 110a’ and ‘second low-resistance metal thin film layer 110b’.
- the method of forming the electrode 100 includes a first process cycle (CY 1 ) and a second process cycle (CY 2 ).
- the first process cycle (CY 1 ) is a process cycle for forming the first metal thin film layer 110a.
- This first process cycle (CY 1 ) may include 'first precursor injection process - first purge process - first plasma generation process - reducing gas injection process - second purge process - second plasma generation process'.
- the first precursor may be referred to as the first source.
- the first precursor used in the first process cycle (CY 1 ) may be a precursor containing at least one low-resistance metal element selected from molybdenum (Mo), ruthenium (Ru), and copper (Cu).
- the first precursor used in the first process cycle (CY 1 ) may be a precursor containing molybdenum (Mo).
- the first metal thin film layer 110a containing molybdenum (Mo) may be formed through the first process cycle (CY 1 ).
- the second process cycle (CY 2 ) is a process cycle for forming the second metal thin film layer 110b, and the second process cycle (CY 2 ) is 'second precursor injection process - first purge process - first plasma generation process. It may include - a reducing gas injection process - a second purge process - a second plasma generation process.
- the second precursor may be referred to as the second source.
- the second precursor used in the second process cycle (CY 2 ) contains at least one low-resistance metal element selected from molybdenum (Mo), ruthenium (Ru), and copper (Cu) and is a precursor different from the first precursor. You can.
- the second precursor used in the second process cycle (CY 2 ) may be a precursor containing ruthenium (Ru). Accordingly, the second metal thin film layer 110b containing ruthenium (Ru) may be formed through the second process cycle (CY 2 ).
- first process cycle (CY 1 ) and the second process cycle (CY 2 ) as described above are alternately repeated multiple times. Accordingly, as shown in Figure 4, an electrode is formed in which a first metal thin film layer (CY 1 ) containing molybdenum (Mo) and a second metal thin film layer (CY 2 ) containing ruthenium (Ru) are alternately stacked multiple times. .
- first and second process cycles (CY 1 , CY 2 ) each include a first plasma generation process, a reducing gas injection process, and a second plasma generation process, as in the first embodiment described above. That is, the first and second process cycles (CY 1 , CY 2 ) each generate a first plasma after the precursor injection process and a second plasma after the reduction gas injection, and the first and second plasma are oxygen plasma. Or it may be hydrogen plasma.
- the first and second process cycles (CY 1 , CY 2 ) each include a reducing gas injection process performed between the first plasma generation process and the second plasma generation process, and hydrogen (H) or oxygen is used as the reducing gas. Use a gas containing (O).
- the electrode 100 from which impurities caused by the precursor containing a low-resistance metal element are removed can be formed. That is, a first adsorption layer formed by injecting the first precursor in the first process cycle (CY 1 ) and then generating hydrogen plasma or oxygen plasma in the first plasma generation process, thereby adsorbing the first precursor onto the substrate (S). It is possible to remove at least one ligand impurity from carbon (C), oxygen (O), and hydrogen (H). In addition, by spraying a reducing gas containing hydrogen (H) or oxygen (O) toward the substrate (S) on which the first adsorption layer is formed, the remaining carbon (C), oxygen (O), and hydrogen (H) are removed at least.
- One ligand impurity can be additionally removed.
- carbon (C), oxygen (O) and Hydrogen (H) at least one ligand impurity may be further removed.
- carbon (C) and oxygen (O ) and hydrogen (H) can remove at least one ligand impurity.
- Figure 6 is a diagram showing a state in which an electrode according to a first modification of the first embodiment is formed on a substrate.
- the electrode 100 on a substrate using a precursor containing at least one low-resistance metal element among molybdenum (Mo), ruthenium (Ru), and copper (Cu) was described.
- the electrode is not limited to this, and the electrode can be formed by alternately stacking metal thin film layers containing metal elements other than the low-resistance metal element. That is, an electrode can be formed by alternately stacking metal thin film layers containing a low-resistance metal element and metal thin film layers containing elements other than the low-resistance metal element.
- the metal thin film layer containing a low-resistance metal element in the first modified example is called 'first metal thin film layer 110a', and the low-resistance metal element is referred to as 'first metal thin film layer 110a'.
- the metal thin film layer containing other elements in the outer layer is called the 'third metal thin film layer 110c'.
- the cycle for forming the first metal thin film layer 110a containing a low-resistance metal element is called 'first process cycle (CY 1 )'
- the cycle for forming the third metal thin film layer 110c is called 'third process cycle'. It is named ‘Process Cycle (CY 3 )’.
- the electrode 100 includes a first metal thin film layer 110a including at least one low-resistance metal element selected from molybdenum (Mo), ruthenium (Ru), and copper (Cu), and It may include a third metal thin film layer 110c containing titanium (Ti).
- the third metal thin film layer 110c containing titanium (Ti) may be a TiN thin film layer.
- the electrode 100 can be formed by alternately stacking the first metal thin film layer 110a and the third metal thin film layer 110c multiple times. That is, the electrode 100 includes a plurality of first metal thin film layers 110a and a plurality of third metal thin film layers 110c, and the first metal thin film layers 110a and third metal thin film layers 110c are alternately stacked. can be formed.
- the process of forming the third metal thin film layer 110c containing titanium (Ti) includes spraying a source containing titanium (Ti) onto the substrate S (source spraying process) and spraying a purge gas. (first purge process), a process of spraying a reactant gas containing nitrogen (N) (reactant gas injection process), and a process of spraying a purge gas (secondary purge).
- 'source injection process containing titanium (Ti) - first purge process - reactant gas injection process - second purge process' is one third process cycle (CY 3 ) for forming the third metal thin film layer 110c. ) can be done. And, by repeating the first process cycle (CY 1 ) and the third process cycle (CY 3 ) multiple times alternately, a first metal thin film layer 110a containing a low-resistance metal element and a third metal thin film layer which is a TiN metal thin film layer are formed.
- the electrodes 100 may be formed by alternately stacking electrodes 110c.
- the electrode 100 according to the second embodiment shown in FIG. 4 may be formed to include a TiN metal thin film layer. That is, the electrode 100 can be formed to include first and second metal thin film layers 110a and 110b, which are low-resistance metal thin film layers, and a third metal thin film layer 110c, which is a TiN metal thin film layer. At this time, the electrode may be formed by repeatedly stacking the first metal thin film layer 110a, the second metal thin film layer 110b, and the third metal thin film layer 110c in that order.
- Figure 7 is a diagram showing a state in which an electrode according to a second modification of the first embodiment is formed on a substrate.
- the first metal thin film layer 110a containing a low-resistance metal element and the third metal thin film layer 110c containing titanium (Ti) are alternately stacked to form the electrode 100.
- a substrate S is provided on which a third metal thin film layer 110c, which is a metal thin film layer containing titanium (Ti), is formed on the upper surface, and the third metal thin film layer 110c is formed on the upper surface.
- the electrode 100 may be formed by forming a plurality of first low-resistance metal thin film layers 110a on the metal thin film layer 110c.
- a substrate (S) is provided on the upper surface of which a metal thin film layer containing tanium (Ti), for example, a TiN thin film layer, is formed, and a plurality of first low-resistance metal thin film layers 110a are formed on the TiN thin film layer to form an electrode ( 100) can be formed.
- a metal thin film layer containing tanium (Ti) for example, a TiN thin film layer
- the electrode 100 in forming the electrode 100, after spraying a precursor containing a low-resistance metal element, hydrogen (H) or oxygen (O ) Spray reducing gas containing. Accordingly, when the precursor is sprayed toward the substrate (S), impurities adsorbed to the substrate (S) can be removed. That is, by breaking the ligand bond of at least one of carbon (C), oxygen (O), and hydrogen (H) contained in the precursor using a reducing gas, impurities are removed from the adsorption layer 111 adsorbed on the substrate (S). can be removed.
- hydrogen plasma or oxygen plasma is generated between the process of spraying a precursor containing a low-resistance metal element and the reducing gas injection process (first plasma generation), and after spraying the reducing gas, hydrogen plasma or oxygen plasma is generated. (Second plasma generation). Accordingly, before spraying the reducing gas, it is possible to remove at least one ligand impurity among carbon (C), oxygen (O), and hydrogen (H) contained in the adsorption layer 111 using the first plasma. In addition, after spraying the reducing gas, at least one ligand impurity among carbon (C), oxygen (O), and hydrogen (H) contained in the metal thin film layer 110 can be further removed using the second plasma. there is.
- the electrode 100 can be prepared from which at least one ligand impurity of carbon (C), oxygen (O), and hydrogen (H) resulting from a precursor containing a low-resistance metal element is removed. Therefore, it is possible to suppress or prevent the electrical characteristics of the electrode 100 from being deteriorated due to impurities. In other words, it is possible to prepare an electrode 100 with improved electrical characteristics, or more specifically, an electrode 100 with low resistance.
- Figure 8 is a diagram schematically showing the structure of a semiconductor device according to a third embodiment of the present invention.
- 9 to 11 are diagrams exemplarily showing a method of forming a semiconductor device according to a third embodiment of the present invention.
- Figures 8 to 11 are shown using reference numerals separate from Figures 1, 3, 6, and 7 described above.
- a third embodiment of the present invention provides an electrode for a semiconductor device and a method of forming the same, which can reduce damage to the underlying film that occurs during the formation of the electrode when forming the electrode on silicon or a silicon-containing film.
- the third embodiment of the present invention provides an electrode of a semiconductor device including an improved barrier film to reduce damage to the lower film that occurs during the formation of the electrode when forming an electrode on silicon or a silicon-containing film, and the electrode thereof.
- a formation method is provided.
- the third embodiment of the present invention provides an improved semiconductor device electrode and its formation that can reduce damage to the surface roughness of the lower film that occurs in the process of forming the electrode when forming an electrode on silicon or a silicon-containing film. Provides a method.
- the third embodiment of the present invention is a more improved barrier film that can reduce damage to the surface roughness of the barrier film to reduce damage to the lower film that occurs in the process of forming the electrode when forming an electrode on silicon or a silicon-containing film.
- a more improved semiconductor device electrode and a method of forming the same are provided.
- the electrode of the semiconductor device according to the third embodiment may be an electrode formed on an insulating film.
- the substrate may be a substrate on which an insulating film 100 made of silicon or a silicon-containing film is formed.
- forming a ruthenium (Ru) film or a ruthenium (Ru)-containing film on the insulating film 100 as a barrier film on the substrate may be performed.
- forming a tungsten (W) or tungsten (W)-containing film on the ruthenium (Ru) film or ruthenium (Ru)-containing film may be performed.
- the ruthenium (Ru) or ruthenium (Ru)-containing film may be formed by chemical vapor deposition (CVD), physical vapor deposition (PVD), or atomic layer deposition (ALD), but is not limited thereto.
- CVD chemical vapor deposition
- PVD physical vapor deposition
- ALD atomic layer deposition
- the ruthenium (Ru) or ruthenium (Ru)-containing film can be formed by atomic layer deposition (ALD).
- the ruthenium (Ru) or ruthenium (Ru)-containing film includes spraying a source gas containing ruthenium (Ru) onto the insulating film 100 on the substrate, purging the source gas, and oxygen (O 2 ).
- a deposition cycle including the step of spraying a gas containing oxygen and purging a gas containing oxygen can be formed repeatedly.
- the atomic layer deposition method can be deposited at a lower temperature than other common chemical vapor deposition (CVD) methods and can be advantageous when forming an ultra-thin film.
- the thickness of the ruthenium (Ru) film or ruthenium (Ru)-containing film is less than 50% of the thickness of the electrode to be formed later.
- the thickness of the ruthenium (Ru) film or ruthenium (Ru)-containing film is 50% of the thickness of the tungsten (W) film or tungsten (W)-containing film. It is desirable to form it with a thickness of % or less.
- the ruthenium (Ru) film or ruthenium (Ru)-containing film is preferably formed to a thickness of 5 ⁇ to 50 ⁇ . If deposited below 5 ⁇ , it is difficult to obtain an effect as a barrier film, and if ruthenium (Ru) is deposited thicker than 50 ⁇ , expensive ruthenium (Ru) materials must be used thickly, resulting in high costs.
- the ruthenium (Ru)-containing film may be ruthenium oxide (RuO).
- the ruthenium (Ru) or ruthenium (Ru)-containing film may be formed from an organic source containing ruthenium (Ru).
- a ruthenium (Ru) source containing a halogen element (fluorine or chlorine) is used to form a barrier film
- the lower film may be damaged by the halogen element contained in the ruthenium (Ru) source when ruthenium (Ru) is formed. This may worsen the surface roughness of the lower membrane.
- the lower film may not be damaged.
- the ruthenium (Ru) or ruthenium (Ru)-containing film itself has strong resistance to halogen elements (fluorine or chlorine).
- halogen elements fluorine or chlorine.
- the tungsten (W) or tungsten (W)-containing film may be formed by chemical vapor deposition (CVD), physical vapor deposition (PVD), or atomic layer deposition, but is not limited thereto.
- CVD chemical vapor deposition
- PVD physical vapor deposition
- atomic layer deposition but is not limited thereto.
- the tungsten (W) or tungsten (W)-containing film can be formed by atomic layer deposition. Uniform film quality can be secured through atomic layer deposition for both ruthenium (Ru) and tungsten (W).
- tungsten (W) or a tungsten (W)-containing film can be formed from a gaseous halogen gas such as tungsten hexafluoride (WF 6 ).
- the electrode of the semiconductor device according to the third embodiment may be an electrode or wiring of a memory or non-memory device.
- the active layer of a transistor which is a semiconductor device, is a silicon-containing film, it may be the gate electrode, source electrode, or drain electrode of the transistor.
- the electrode of the semiconductor device of the present invention may include ruthenium (Ru) or a ruthenium-containing film between the active layer and the active layer.
- the electrode of the semiconductor device may include ruthenium (Ru) or a ruthenium-containing film between an active layer containing one or more of indium, gallium, zinc, and tin.
- the electrode of the semiconductor device may include a ruthenium (Ru) or ruthenium-containing film between an active layer formed of GaN, GaAs, etc.
- It may include removing oxides or impurities from the surface of the silicon or silicon-containing film before forming the ruthenium (Ru) film or ruthenium (Ru)-containing film. This can remove impurities present in the upper part of the lower film before forming ruthenium (Ru), remove the natural oxide film present in the lower film, and form a ruthenium (Ru) film or ruthenium (Ru)-containing film to form a high-quality film. This is to do it.
- the structure according to the present invention may include an insulating film 100, a ruthenium (Ru) film 200, and a tungsten (W) film 300. At least one of the bit line 160 and the word line 120 may be formed on the top or bottom of the structure.
- the method of forming an electrode of a semiconductor device includes forming a ruthenium film or a ruthenium-containing film on silicon or a silicon-containing film; and forming a tungsten-containing film on the ruthenium film or ruthenium-containing film.
- the ruthenium film or ruthenium-containing film may have a thickness of 50% or less of the tungsten-containing film.
- the ruthenium film or ruthenium-containing film can be formed to a thickness of 5 ⁇ to 50 ⁇ .
- the ruthenium film or ruthenium-containing film can be formed by atomic layer deposition.
- the ruthenium film or ruthenium-containing film can be formed from an organic source containing ruthenium.
- the tungsten-containing film can be formed from tungsten halogen gas.
- the electrode may form a semiconductor device that is any one of a memory device electrode, a word line, a bit line, a transistor electrode, a GaN semiconductor electrode, or a GaAs semiconductor electrode.
- an electrode can be prepared from which ligand impurities resulting from a precursor containing a low-resistance metal element are removed. Therefore, an electrode with low resistance can be prepared. Additionally, according to embodiments of the present invention, a barrier layer and an electrode can be formed to reduce damage to the lower layer.
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Abstract
Description
Claims (32)
- 기판을 준비하는 단계;상기 기판 상에 저 저항 금속 원소를 포함하는 전구체(precursor)를 분사하는 단계;상기 기판 상에 수소(H) 또는 산소(O)를 포함하는 가스를 분사하여 저 저항 금속 박막층을 형성하는 단계;를 포함하는 반도체 소자의 전극 형성 방법.
- 청구항 1에 있어서,상기 전구체를 분사하는 단계 및 저 저항 금속 박막층을 형성하는 단계를 순차적으로 복수회 실시하는 반도체 소자의 전극 형성 방법.
- 청구항 2에 있어서,상기 전구체를 분사하는 단계 후에 상기 기판을 제1플라즈마에 노출시켜 상기 기판 상에 흡착된 불순물을 제거하는 단계; 및상기 저 저항 금속 박막층을 형성하는 단계 후에 상기 저 저항 금속 박막층을 제2플라즈마에 노출시켜 불순물을 제거하는 단계;를 포함하고,상기 전구체를 분사하는 단계, 상기 제1플라즈마에 노출시키는 단계, 상기 제2플라즈마에 노출시키는 단계를 순차적으로 복수회 실시하는 반도체 소자의 전극 형성 방법.
- 청구항 1에 있어서,상기 저 저항 금속 원소는 몰리브덴(Mo), 루테늄(Ru) 및 구리(Cu) 중 적어도 하나를 포함하는 반도체 소자의 전극 형성 방법.
- 청구항 3에 있어서,상기 제1플라즈마는 수소(H)를 포함하는 플라즈마 또는 산소(O)를 포함하는 플라즈마로 형성하는 반도체 소자의 전극 형성 방법.
- 청구항 3에 있어서,상기 제2플라즈마는 수소(H)를 포함하는 플라즈마 또는 산소(O)를 포함하는 플라즈마로 형성하는 반도체 소자의 전극 형성 방법.
- 청구항 1에 있어서,상기 기판 상에 TiN 박막층을 형성하는 단계를 더 포함하고,상기 TiN 박막층을 형성하는 단계는,상기 기판 상에 티타늄(Ti)을 포함하는 소스를 분사하는 단계; 및상기 기판 상에 질소(N)를 포함하는 가스를 분사하는 단계;를 포함하고,상기 저 저항 금속 원소를 포함하는 전구체를 분사하는 단계, 저 저항 금속 박막층을 형성하는 단계 및 상기 TiN 박막층을 형성하는 단계를 순차적으로 복수회 실시하는 반도체 소자의 전극 형성 방법.
- 청구항 1에 있어서,상기 기판을 준비하는 단계에 있어서, 상부면에 TiN 박막층이 형성된 기판을 준비하는 반도체 소자의 전극 형성 방법.
- 기판을 준비하는 단계;제1 저 저항 금속 원소를 포함하는 소스를 분사하고, 수소(H) 또는 산소(O)를 포함하는 가스를 분사하여 제1 저 저항 금속 박막층을 형성하는 단계; 및제2 저 저항 금속 원소를 포함하는 소스를 분사하고, 수소(H) 또는 산소(O)를 포함하는 가스를 분사하여 제2 저 저항 금속 박막층을 형성하는 단계;를 포함하고,상기 제1 저 저항 금속 박막층을 형성하는 단계와 제2 저 저항 금속 박막층을 형성하는 단계를 순차적으로 복수회 실시하는 반도체 소자의 전극 형성 방법.
- 청구항 9에 있어서,상기 제1 저 저항 금속 원소 및 제2 저 저항 금속 원소는 몰리브덴(Mo), 루테늄(Ru) 및 구리(Cu) 중 적어도 하나를 포함하는 반도체 소자의 전극 형성 방법.
- 청구항 9에 있어서,상기 제1 저 저항 금속 원소와 상기 제2 저 저항 금속 원소는 동일한 금속 원소를 포함하는 반도체 소자의 전극 형성 방법.
- 청구항 9에 있어서,상기 제1 저 저항 금속 원소 및 상기 제2 저 저항 금속 원소 중 적어도 하나는, 몰리브덴(Mo), 루테늄(Ru) 및 구리(Cu) 중 적어도 둘 이상을 포함하는 반도체 소자의 전극 형성 방법.
- 청구항 9에 있어서,티타늄(Ti)을 포함하는 소스를 분사하고, 질소(N)를 포함하는 리액턴트를 분사하여 TiN 박막층을 형성하는 단계를 더 포함하고,상기 제1 저 저항 금속 박막층을 형성하는 단계, 제2 저 저항 금속 박막층을 형성하는 단계 및 TiN 박막층을 형성하는 단계를 순차적으로 반복 실시하는 반도체 소자의 전극 형성 방법.
- 청구항 9에 있어서,상기 기판을 준비하는 단계에 있어서, 상부면에 TiN 박막층이 형성된 기판을 준비하는 반도체 소자의 전극 형성 방법.
- 기판을 준비하는 단계;상기 기판 상에 저 저항 금속 원소를 포함하는 액상의 전구체(precursor)를 분사하는 단계;상기 기판 상에 수소(H) 또는 산소(O)를 포함하는 가스를 분사하여 저 저항 금속 박막층을 형성하는 단계;를 포함하는 반도체 소자의 전극 형성 방법.
- 청구항 15에 있어서,상기 전구체를 분사하는 단계 및 저 저항 금속 박막층을 형성하는 단계를 순차적으로 복수회 실시하는 반도체 소자의 전극 형성 방법.
- 청구항 15에 있어서,상기 저 저항 금속 원소는 몰리브덴(Mo), 루테늄(Ru) 및 구리(Cu) 중 적어도 하나를 포함하는 반도체 소자의 전극 형성 방법.
- 반도체 소자의 전극 형성 방법으로서,실리콘 또는 실리콘 함유막 상에 루테늄막 또는 루테늄 함유막을 형성하는 단계;상기 루테늄막 또는 루테늄 함유막 상에 텅스텐 함유막을 형성하는 단계;를 포함하는 반도체 소자의 전극 형성 방법.
- 청구항 18에 있어서,상기 루테늄막 또는 루테늄 함유막의 두께는 상기 텅스텐 함유막 두께의 50%이하의 두께로 형성하는 반도체 소자의 전극 형성 방법.
- 청구항 18에 있어서,상기 루테늄막 또는 루테늄 함유막은 5Å ~ 50Å의 두께로 형성하는 반도체 소자의 전극 형성 방법.
- 청구항 18에 있어서,상기 루테늄막 또는 루테늄 함유막은 원자층 증착 방식으로 형성하는 반도체 소자의 전극 형성 방법.
- 청구항 18에 있어서,상기 루테늄막 또는 루테늄 함유막은 루테늄을 함유하는 유기소스로 형성하는 반도체 소자의 전극 형성 방법.
- 청구항 18에 있어서,상기 텅스텐 함유막은 텅스텐 할로겐 가스로 형성하는 반도체 소자의 전극 형성 방법.
- 청구항 18에 있어서,상기 전극은 메모리 소자의 전극, 워드라인, 비트라인, 트랜지스터의 전극, GaN 반도체의 전극, GaAs 반도체의 전극 중 어느 하나인 반도체 소자의 전극 형성 방법.
- 청구항 18에 있어서,상기 루테늄막 또는 루테늄 함유막을 형성하기 전에,상기 실리콘 또는 실리콘 함유막의 표면의 산화물 또는 불순물을 제거하는 단계; 를 포함하는 반도체 소자의 전극 형성 방법.
- 실리콘 또는 실리콘 함유막;상기 실리콘 또는 실리콘 함유막 상에 형성된 루테늄막 또는 루테늄 함유막;및상기 루테늄막 또는 루테늄 함유막 상에 형성된 텅스텐 함유막;을 포함하는 반도체 소자의 전극.
- 청구항 26에 있어서,상기 루테늄막 또는 루테늄 함유막의 두께는 상기 텅스텐 함유막 두께의 50%이하의 두께로 형성하는 반도체 소자의 전극.
- 청구항 26에 있어서,상기 루테늄막 또는 루테늄 함유막은 5Å ~ 50Å의 두께로 형성하는 반도체 소자의 전극.
- 청구항 26에 있어서,상기 루테늄막 또는 루테늄 함유막은 원자층 증착 방식으로 형성하는 반도체 소자의 전극.
- 청구항 26에 있어서,상기 루테늄막 또는 루테늄 함유막은 루테늄을 함유하는 유기소스로 형성하는 반도체 소자의 전극.
- 청구항 26에 있어서,상기 텅스텐 함유막은 텅스텐 할로겐 가스로 형성하는 반도체 소자의 전극.
- 청구항 26에 있어서,상기 전극은 메모리 소자의 전극, 워드라인, 비트라인, 트랜지스터의 전극 중 어느 하나인 반도체 소자의 전극.
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| CN202380038322.2A CN119156698A (zh) | 2022-05-10 | 2023-05-09 | 用于半导体装置的电极及其形成方法 |
| JP2024565377A JP2025515681A (ja) | 2022-05-10 | 2023-05-09 | 半導体素子の電極の形成方法及び半導体素子の電極 |
| US18/864,529 US20250343046A1 (en) | 2022-05-10 | 2023-05-09 | Method for forming electrode for semiconductor devices, and electrode for semiconductor devices |
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| KR10-2022-0057186 | 2022-05-10 | ||
| KR10-2022-0124685 | 2022-09-29 | ||
| KR1020220124685A KR20240044993A (ko) | 2022-09-29 | 2022-09-29 | 반도체 소자의 전극의 제조 방법 및 구조 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090142474A1 (en) * | 2004-12-10 | 2009-06-04 | Srinivas Gandikota | Ruthenium as an underlayer for tungsten film deposition |
| KR20150105216A (ko) * | 2014-03-06 | 2015-09-16 | 가부시키가이샤 히다치 고쿠사이 덴키 | 기판 처리 장치 및 반도체 장치의 제조 방법 및 기록 매체 |
| KR20200090267A (ko) * | 2017-12-15 | 2020-07-28 | 램 리써치 코포레이션 | 반도체 프로세싱을 위한 챔버 컴포넌트들의 엑스시츄 코팅 |
| JP2021050379A (ja) * | 2019-09-24 | 2021-04-01 | 東京エレクトロン株式会社 | 半導体装置の製造方法及び半導体装置の製造装置 |
| KR102281464B1 (ko) * | 2014-02-04 | 2021-07-27 | 에이에스엠 아이피 홀딩 비.브이. | 금속들, 금속 산화물들, 및 유전체들의 선택적 퇴적 |
-
2023
- 2023-05-09 US US18/864,529 patent/US20250343046A1/en active Pending
- 2023-05-09 CN CN202380038322.2A patent/CN119156698A/zh active Pending
- 2023-05-09 WO PCT/KR2023/006303 patent/WO2023219400A1/ko not_active Ceased
- 2023-05-09 JP JP2024565377A patent/JP2025515681A/ja active Pending
- 2023-05-10 TW TW112117253A patent/TW202349472A/zh unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090142474A1 (en) * | 2004-12-10 | 2009-06-04 | Srinivas Gandikota | Ruthenium as an underlayer for tungsten film deposition |
| KR102281464B1 (ko) * | 2014-02-04 | 2021-07-27 | 에이에스엠 아이피 홀딩 비.브이. | 금속들, 금속 산화물들, 및 유전체들의 선택적 퇴적 |
| KR20150105216A (ko) * | 2014-03-06 | 2015-09-16 | 가부시키가이샤 히다치 고쿠사이 덴키 | 기판 처리 장치 및 반도체 장치의 제조 방법 및 기록 매체 |
| KR20200090267A (ko) * | 2017-12-15 | 2020-07-28 | 램 리써치 코포레이션 | 반도체 프로세싱을 위한 챔버 컴포넌트들의 엑스시츄 코팅 |
| JP2021050379A (ja) * | 2019-09-24 | 2021-04-01 | 東京エレクトロン株式会社 | 半導体装置の製造方法及び半導体装置の製造装置 |
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| US20250343046A1 (en) | 2025-11-06 |
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| JP2025515681A (ja) | 2025-05-20 |
| TW202349472A (zh) | 2023-12-16 |
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