WO2023105682A1 - 活性ガス生成装置 - Google Patents
活性ガス生成装置 Download PDFInfo
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- WO2023105682A1 WO2023105682A1 PCT/JP2021/045129 JP2021045129W WO2023105682A1 WO 2023105682 A1 WO2023105682 A1 WO 2023105682A1 JP 2021045129 W JP2021045129 W JP 2021045129W WO 2023105682 A1 WO2023105682 A1 WO 2023105682A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32532—Electrodes
- H01J37/32541—Shape
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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
- C23C16/448—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 generating reactive gas streams, e.g. by evaporation or sublimation of precursor materials
- C23C16/452—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 generating reactive gas streams, e.g. by evaporation or sublimation of precursor materials by activating reactive gas streams before their introduction into the reaction chamber, e.g. by ionisation or addition of reactive species
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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
- C23C16/50—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 using electric discharges
- C23C16/505—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 using electric discharges using radio frequency discharges
- C23C16/509—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 using electric discharges using radio frequency discharges using internal electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32348—Dielectric barrier discharge
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/3244—Gas supply means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32532—Electrodes
- H01J37/3255—Material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32715—Workpiece holder
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
- H05H1/2437—Multilayer systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
- H01J2237/327—Arrangements for generating the plasma
Definitions
- the present disclosure relates to an active gas generator that utilizes a parallel plate type dielectric barrier discharge to generate an active gas and supplies the active gas to a subsequent processing space.
- Examples of active gas generators that generate active gas by parallel plate type dielectric barrier discharge include the plasma processing apparatus disclosed in Patent Document 1 and the active gas generator disclosed in Patent Document 2.
- Conventional active gas generators use dielectric barrier discharge to generate active gas such as nitrogen radicals from raw material gas such as nitrogen gas, and eject the active gas into the above-described processing space.
- the active gas is supplied to the entire surface of the wafer arranged in the processing space by forming a large number of pores through which the active gas is ejected in the lower electrode.
- a plurality of gas supply holes provided in the upper high-voltage side electrode configuration portion and a plurality of gas ejection holes provided in the lower ground side electrode configuration portion are formed on a plane. Improvements have been made such as arranging them so that they do not overlap each other when viewed. By performing the above-described improvements, the active gas generator can supply active gas having a relatively uniform radical concentration to the entire surface of the wafer arranged in the processing space.
- the residence time of the discharge field is significantly different between the plurality of active gases (radical gases) ejected from the plurality of pores. This is because the residence time of multiple active gases in the discharge field depends on the positions of the corresponding pores. For this reason, the plasma processing apparatus disclosed in Patent Document 1 has a problem that it is difficult to uniformly eject an active gas having a uniform radical concentration.
- Patent Document 2 aims to solve the above-mentioned problems of the plasma processing apparatus.
- An object of the present disclosure is to solve the above-described problems and to provide an active gas generator capable of evenly ejecting active gas having an equal radical concentration.
- An active gas generating apparatus of the present disclosure is an active gas generating apparatus that generates an active gas obtained by activating a raw material gas supplied to a discharge space, comprising a first electrode configuration part and the first electrode configuration part and a second electrode configuration portion provided below the second electrode configuration portion, wherein the first electrode configuration portion includes a first electrode dielectric film and a plurality of electrodes formed on the upper surface of the first electrode dielectric film. and the second electrode configuration portion includes a second electrode dielectric film and a plurality of second electrode dielectric films formed on the lower surface of the second electrode dielectric film.
- the dielectric film for the first electrode is a first a plurality of gas supply areas arranged along the direction of the second direction, each of the plurality of gas supply areas having a plurality of gas supply holes provided at equal intervals along the second direction;
- the direction intersects the first direction, the plurality of first metal electrodes are arranged along the first direction, and the plurality of first metal electrodes are each formed to extend in the second direction.
- the second electrode dielectric film has a plurality of discharge field forming regions arranged along the first direction, and each of the plurality of discharge field forming regions is formed by the second electrode dielectric film.
- a recess region recessed from the surface of the body film and extending in the second direction; a plurality of gas ejection holes provided below each of the plurality of discharge field forming regions; The ejection holes are provided at regular intervals along the second direction, the plurality of second metal electrodes are arranged along the first direction, and the plurality of second metal electrodes are each arranged in the second direction.
- said discharge space comprises a plurality of discharge spaces, said plurality of first metal electrodes, said plurality of gas supply regions, said plurality of second metal electrodes, said plurality of discharge field forming
- the plurality of first metal electrodes, the plurality of second metal electrodes, the plurality of gas supply regions, the plurality of discharge field forming regions, and the plurality of discharge spaces correspond to each other on a one-to-one basis.
- the corresponding first metal electrode, the second metal electrode, the gas supply region, the discharge field formation region and the discharge space are the first corresponding metal electrode, the second corresponding metal electrode, the corresponding gas defined as a supply area, a corresponding discharge field forming area and a corresponding discharge space, wherein the first corresponding metal electrode, the second corresponding metal electrode, the corresponding gas supply area, the corresponding discharge field forming area and the corresponding discharge space are defined as:
- a unidirectional discharge structure is configured along the second direction, and the unidirectional discharge structure satisfies the following arrangement conditions (a) to (c).
- each of the plurality of discharge field forming regions has a plurality of gas ejection holes. , can eject active gas with equal radical concentration.
- the active gas can be uniformly ejected from each of the plurality of gas ejection holes.
- the active gas generator of the present disclosure can evenly eject active gas with the same radical concentration from all the gas ejection holes provided in the plurality of discharge field forming regions.
- FIG. 1 is an explanatory diagram showing the overall configuration of an active gas generator according to Embodiment 1;
- FIG. FIG. 2 is a plan view (No. 1) showing a planar structure of the high-voltage applying electrode portion shown in FIG. 1;
- FIG. 2 is a plan view (No. 2) showing a planar structure of a high-voltage applying electrode section; It is a perspective view which shows the whole structure of a high voltage application electrode part.
- FIG. 2 is a plan view (No. 1) showing a planar structure of the ground potential electrode portion shown in FIG. 1;
- FIG. 2 is a plan view (No. 2) showing a planar structure of a ground potential electrode portion;
- 1 is a perspective view showing the overall configuration of a ground potential electrode section;
- FIG. 1 is a perspective view showing the overall structure of a dielectric barrier discharge structure
- FIG. 2 is a cross-sectional view showing the cross-sectional structure of the unidirectional discharge structure of Embodiment 1
- FIG. It is explanatory drawing which shows typically the planar structure which looked the unidirectional discharge structure from the downward direction.
- FIG. 10 is a plan view showing a planar structure of a high-voltage applying electrode section in the active gas generator of Embodiment 2
- FIG. 10 is a plan view showing a planar structure of a ground potential electrode portion according to the second embodiment
- FIG. 7 is a cross-sectional view showing a cross-sectional structure of a unidirectional discharge structure according to Embodiment 2
- FIG. 10 is a plan view (No.
- FIG. 11 is a plan view (part 2) showing the planar structure of the ground potential electrode portion of the third embodiment
- FIG. 10 is an explanatory view schematically showing a planar structure of the unidirectional discharge structure of Embodiment 3 as viewed from below;
- the active gas Since the active gas has a very short life and is deactivated in a short period of time, it is necessary to generate the active gas in the vicinity of the processing space where the wafers to be processed are arranged and to spray the wafers with the active gas. In addition, in order to maintain the uniformity of the film formed on the wafer, the active gas must be evenly sprayed onto the wafer.
- the dielectric barrier discharge requires the pressure of the discharge field (discharge space) to be above a certain level, so it is necessary to generate the discharge in a separate room separate from the processing space (film formation chamber) in which the wafer is placed.
- the active gas generator is required to spray the active gas evenly onto the wafer.
- the active gas generator of the present disclosure has technical improvements for more uniform gas flow and more uniform gas residence time in the discharge field compared to conventional discharge field shapes. As a result, the active gas generator of the present disclosure makes it possible to more evenly spray active gas (radical gas) having a constant radical density onto wafers, which are substrates to be processed.
- FIG. 1 is an explanatory diagram showing the overall configuration of an active gas generator 51 according to Embodiment 1 of the present disclosure.
- An XYZ orthogonal coordinate system is shown in FIG.
- the active gas generator 51 includes a dielectric barrier discharge structure 61 provided inside a metal generator cover 3, a chamber 4 serving as a film forming chamber, a vacuum pump 45, and a high frequency power source 100. and are included as main components.
- the generator cover 3 has a gas supply port 30 for supplying the raw material gas 5 upward, and accommodates a dielectric barrier discharge structure 61 inside.
- the dielectric barrier discharge structure 61 comprises a high voltage applying electrode portion 1 serving as a first electrode forming portion and a ground potential electrode portion 2 serving as a second electrode forming portion provided below the high voltage applying electrode portion 1. It contains as a main component.
- an active gas 8 obtained by activating the raw material gas 5 supplied to each of the plurality of discharge spaces 6 is generated.
- FIGS. 2 and 3 are plan views showing the planar structure of the high voltage applying electrode section 1, respectively.
- 2 is a plan view seen from above
- FIG. 3 is a plan view seen from below.
- FIG. 4 is a perspective view showing the overall structure of the high voltage applying electrode section 1. As shown in FIG.
- Each of FIGS. 2 to 4 shows an XYZ orthogonal coordinate system.
- FIGS. 5 and 6 are plan views showing the planar structure of the ground potential electrode portion 2, respectively.
- 5 is a plan view seen from above
- FIG. 6 is a plan view seen from below.
- FIG. 7 is a perspective view showing the overall configuration of the ground potential electrode section 2. As shown in FIG.
- Each of FIGS. 5 to 7 shows an XYZ orthogonal coordinate system.
- FIG. 8 is a perspective view showing the overall structure of the dielectric barrier discharge structure 61.
- FIG. FIG. 8 shows an XYZ orthogonal coordinate system.
- the high-voltage applying electrode section 1 is formed on an electrode dielectric film 11 serving as a first electrode dielectric film and on the upper surface of the electrode dielectric film 11. and a plurality of metal electrodes 10 serving as a plurality of first metal electrodes.
- the ground potential electrode portion 2 is formed on the electrode dielectric film 21 which serves as the second electrode dielectric film and on the lower surface of the electrode dielectric film 21. and a plurality of metal electrodes 20 serving as a plurality of second metal electrodes.
- an AC voltage is applied from a high-frequency power supply 100 to a plurality of metal electrodes 10, and a plurality of metal electrodes 20 are set to a ground potential as a reference potential through the bottom surface of a metal generator cover 3. be.
- the peripheral region of the electrode dielectric film 21 is directed upward (+Z direction). It has a projecting portion 21t.
- the gap length of each of the plurality of discharge spaces 6 is defined by the projection length of the projecting portion 21t.
- the electrode dielectric film 11 serving as the first electrode dielectric film has a rectangular shape (substantially square shape) in a plan view, and is oriented in the Y direction, which is the first direction. It has a plurality of gas supply regions 12R discretely arranged along. The plurality of gas supply regions 12R have a plurality of gas supply holes 12, respectively.
- a plurality of gas supply holes 12 are provided discretely from each other at equal intervals (first interval) along the X direction, which is the second direction. As shown in FIG. 1, a plurality of gas supply holes 12 pass through an electrode dielectric film 11 .
- the X direction is a direction perpendicular to the Y direction.
- the plurality of metal electrodes 10 are arranged separately along the Y direction, and the plurality of metal electrodes 10 are formed extending in the X direction.
- Each of the plurality of metal electrodes 10 has a rectangular shape in plan view.
- the region in which the plurality of metal electrodes 10 and the plurality of gas supply regions 12R are formed includes the wafer size of the wafer 7 to be processed (indicated by broken lines in the drawing) and is a slightly wider plane. It has a shape.
- the electrode dielectric film 21 serving as the second electrode dielectric film has a rectangular shape (substantially square shape) in plan view, and is discretely arranged along the Y direction. It has a plurality of gap regions 23 that are connected to each other. A plurality of gap regions 23 function as a plurality of discharge field forming regions having discharge spaces 6 therein.
- Each of the plurality of gap regions 23 has a recessed region recessed from the surface, and the recessed region is provided extending in the X direction (second direction). That is, the recessed regions of each of the plurality of gap regions 23 are continuously formed in the X direction.
- the plurality of gap regions 23 have a substantially rectangular shape with some chamfered corners in plan view.
- the electrode dielectric film 21 and the electrode dielectric film 11 have the same shape in plan view.
- a plurality of gas ejection holes 22 are provided below each of the plurality of gap regions 23 .
- a plurality of gas ejection holes 22 are provided discretely from each other at equal intervals (second intervals) along the X direction. As shown in FIG. 1 , the plurality of gas ejection holes 22 penetrate through the electrode dielectric film 21 under the plurality of gap regions 23 .
- the plurality of gas ejection holes 22 are arranged with a certain distance (for example, about 10 mm) from the metal electrode 20 along the Y direction.
- the fixed distance changes depending on the magnitude of the applied voltage. For example, when a voltage of 6 kV0p is applied from the high-frequency power supply 100 to the plurality of metal electrodes 10, and the downstream pressure in the chamber 4 downstream of the gas ejection holes 22 is 200 to 500 Pa, the above constant interval needs to be about 10 mm. It has been confirmed that
- the reason for this is to weaken the electric field intensity directly below the plurality of gas ejection holes 22 so as to prevent abnormal discharge from occurring at that location. Since the dielectric barrier discharge used in Embodiment 1 requires a relatively high pressure (10 kPa or more) in the plurality of discharge spaces 6, the plurality of gas ejection holes 22 also function as orifices. A pressure difference can be provided between the discharge spaces 6 and the chamber 4 by means of the plurality of gas ejection holes 22 functioning as orifices.
- the plurality of gas ejection holes 22 are arranged with a certain distance from the metal electrode 20 .
- the plurality of metal electrodes 20 are arranged along the Y direction, and the plurality of metal electrodes 20 are formed extending in the X direction.
- Each of the plurality of metal electrodes 20 has a rectangular shape in plan view.
- Multiple metal electrodes 10 (multiple first metal electrodes), multiple gas supply regions 12R, multiple metal electrodes 20 (multiple second metal electrodes), multiple gap regions 23 (multiple discharge field forming regions) and a plurality of discharge spaces 6 are in one-to-one correspondence.
- the regions where the plurality of metal electrodes 20 and the plurality of gap regions 23 are formed include the wafer size of the wafer 7 to be processed (indicated by broken lines in the drawing) and are slightly wider. there is
- a high voltage applying electrode is placed on the ground potential electrode portion 2 so that the electrode dielectric film 21 and the electrode dielectric film 11 are aligned in plan view. It is configured by arranging the part 1 .
- the seven metal electrodes 10, the seven gap regions 23, the seven metal electrodes 20, the seven gap regions 23, and the seven discharge spaces 6 are in one-to-one correspondence. ing.
- the i-th in the Y direction indicates the formation order from the highest position in the Y direction.
- the area where the metal electrode 10 and the metal electrode 20 overlap in plan view in the gap area 23 existing in the i-th direction in the Y direction becomes the i-th discharge space 6 in the Y direction.
- the i-th gas supply region 12R in the Y direction, the metal electrode 10, the gap region 23, the metal electrode 20, and the discharge space 6 are arranged in a one-to-one relationship. Yes.
- the gap region 23 and the discharge space 6 are defined as a corresponding metal electrode 10p, a corresponding metal electrode 20p, a corresponding gas supply region 12Rp, a corresponding gap region 23p and a corresponding discharge space 6p.
- the corresponding metal electrode 10p becomes the first corresponding metal electrode
- the corresponding metal electrode 20p becomes the second corresponding metal electrode
- the corresponding gap region 23p becomes the corresponding discharge field forming region.
- FIG. 9 is a cross-sectional view showing a cross-sectional structure of a unidirectional discharge structure 61s in the dielectric barrier discharge structure 61.
- the 'unidirectional discharge structure 61s' means one discharge space 6 classified according to the formation position in the Y direction among the seven discharge spaces 6 each extending in the X direction and the surrounding structure. .
- FIG. 10 is an explanatory diagram schematically showing a planar structure of the unidirectional discharge structure 61s viewed from below (the ⁇ Z direction side).
- An XYZ orthogonal coordinate system is shown in FIGS. 9 and 10, respectively.
- the unidirectional discharge structure 61s in the active gas generator 51 of Embodiment 1 has a region in which the corresponding metal electrode 10p and the corresponding metal electrode 20p overlap in plan view in the corresponding gap region 23p. becomes the corresponding discharge space 6p.
- the raw material gas 5 supplied from the gas supply holes 12 of the corresponding gas supply region 12Rp is activated in the corresponding discharge space 6p where the dielectric barrier discharge is occurring and becomes the active gas 8, and the active gas 8 flows as gas. 41, the gas is ejected from the gas ejection holes 22 under the corresponding gap region 23p toward the chamber 4 (not shown) below.
- the unidirectional discharge structure 61s satisfies the following arrangement conditions (a) to (c).
- the gas supply hole 12a and the gas ejection hole 22a face each other across the corresponding discharge space 6p along the Y direction, and the gas supply hole 12b and the gas ejection hole 22b sandwich the corresponding discharge space 6p.
- the gas supply hole 12c and the gas ejection hole 22c face each other along the Y direction with the corresponding discharge space 6p interposed therebetween.
- the unidirectional discharge structure 61s satisfies the arrangement condition (c).
- the positions (coordinates) in the X direction are the same between the gas supply holes 12a and the gas ejection holes 22a, the positions in the X direction are the same between the gas supply holes 12b and the gas ejection holes 22b, and the gas supply holes 12c and the gas ejection holes 22c.
- the positions in the X direction are the same between them. Therefore, the first interval between adjacent gas supply holes 12, 12 and the second interval between adjacent gas ejection holes 22, 22 are also the same.
- the distance between the corresponding gas supply holes 12 and the corresponding gas ejection holes 22 along the Y direction It is desirable to set the distance to be less than or equal to the first and second intervals.
- the active gas generator 51 has a chamber 4 arranged below the electrode dielectric film 21 .
- a mounting portion 28 is provided on the bottom surface of the chamber 4 , and a wafer 7 as a substrate to be processed is mounted on the mounting portion 28 .
- An exhaust port of the chamber 4 is connected to a vacuum pump 45 .
- the mounting surface of the mounting portion 28 has a planar shape similar to that of the wafer 7 .
- the plurality of gas ejection holes 22 provided in each of the plurality of gap regions 23 are a pair of end gas ejection holes present at both ends in the X direction. 22t.
- the pair of end gas ejection holes 22t are arranged outside the surface of the wafer 7 without overlapping with the wafer 7, which is the substrate to be processed in plan view.
- the plurality of gap regions 23 are formed by chamfering the corners of the plurality of gas ejection holes 22 near the pair of end gas ejection holes 22t to form a pair of chamfered angles.
- a part C23 is provided.
- the gap region 23 has a substantially rectangular shape in plan view, the active gas 8 tends to stay in the corners unless the pair of chamfered corners C23 is provided. Therefore, a pair of chamfered corners C23 are provided at the corners of the gap region 23 closest to the pair of end gas ejection holes 22t. Thus, the gap region 23 has a pair of chamfered corners C23 as a restricting structure for guiding the active gas 8 to the pair of end gas ejection holes 22t.
- the first factor is that the raw material gas 5 supplied from the plurality of gas supply holes 12 in each gas supply region 12R uniformly passes through the discharge space 6, so the active gas 8 ( The difference is that the radical concentration of the radical gas) becomes equal.
- the second factor is that the flow of source gas 5 supplied from gas supply hole 12 is regulated by gap region 23 having a recessed region. That is, the gap region 23 regulates the direction of the gas to flow linearly along the Y direction toward the corresponding gas ejection hole 22 . As a result, regardless of which gas supply hole 12 the raw material gas 5 is supplied from, the residence time of each of the plurality of discharge spaces 6 becomes equal, which is the second factor.
- the active gas 8 is discharged from each of the plurality of gas ejection holes 22. It can be sprayed evenly.
- the active gas generating device 51 of the first embodiment can generate all the gases provided in the plurality of gap regions 23 (all of the first to seventh gap regions 23 in the Y direction shown in FIGS. 5 and 6).
- the active gas with the same radical concentration can be evenly ejected from each of the ejection holes 22 (all the gas ejection holes 22 shown in FIGS. 5 and 6).
- the pair of end gas ejection holes 22t do not overlap the wafer 7, which is the substrate to be processed in plan view, and the surface of the wafer 7 is It has a gas ejection hole arrangement structure arranged further outside.
- the active gas generator 51 of Embodiment 1 has the gas ejection hole arrangement structure described above, the active gas having the same radical concentration can be evenly ejected to the entire surface area of the wafer 7 serving as the substrate to be processed. .
- the active gas generator 51 of Embodiment 1 has a pair of chamfered corners C23 as a narrowing structure in the plurality of gap regions 23 .
- the active gas generator 51 of Embodiment 1 smoothes the gas flow 41 of the active gas 8 so that the gas ejection holes 22 adjacent to each other among the plurality of gas ejection holes 22 provided in each of the plurality of gap regions 23 are ejected. Agitation of the gas flow 41 of the active gas 8 between the holes 22, 22 can be prevented. Stirring of the gas flow 41 is particularly likely to occur at and around the pair of end gas ejection holes 22t.
- the active gas generator 51 of Embodiment 1 suppresses the deactivation of the active gas 8, and makes the gas flow rate of the active gas 8 uniform among the plurality of gas ejection holes 22, 22. be able to.
- FIG. 11 is a plan view showing the planar structure of the high voltage applying electrode section 1B in the active gas generator 52 according to the second embodiment of the present disclosure.
- FIG. 12 is a plan view showing the planar structure of the ground potential electrode section 2 in the active gas generator 52. As shown in FIG. 11 and 12 are plan views viewed from above. An XYZ orthogonal coordinate system is shown in each of FIGS. 11 and 12 .
- the overall configuration of the active gas generator 52 is the same as the structure of Embodiment 1 shown in FIGS. 1 and 8, except that the high voltage applying electrode section 1 is replaced with the high voltage applying electrode section 1B. .
- the same reference numerals as in the first embodiment are given to the same constituent parts as in the first embodiment, and the description thereof will be omitted as appropriate, and the description will focus on the features of the second embodiment.
- the high-voltage-applying electrode portion 1B includes a plurality of high-voltage-side grounding electrodes that serve as a plurality of auxiliary conductive films formed on the upper surface of the electrode dielectric film 11 that is the first electrode dielectric film. It is characterized by further comprising a metal electrode 13 for the device.
- Each of the plurality of high-voltage-side grounding metal electrodes 13 has a rectangular shape in plan view.
- the plurality of high voltage side grounding metal electrodes 13 are provided electrically independently of the plurality of metal electrodes 10 .
- the plurality of high-voltage side grounding center lines L13 shown in FIG. 12 are lines indicating the Y-direction center positions of the plurality of high-voltage side grounding metal electrodes 13 in plan view. As shown in FIG. 12 , in the ground potential electrode portion 2 , the plurality of high-voltage side grounding center lines L13 are lines extending overlapping the plurality of gas ejection holes 22 formed below the plurality of gap regions 23 . .
- a plurality of high-voltage-side grounding metal electrodes 13 are set to a ground potential as a reference potential (not shown).
- the plurality of high voltage side grounding metal electrodes 13 are set to the ground potential through the metal generator cover 3 set to the ground potential and the connection line.
- the plurality of high voltage side grounding metal electrodes 13 correspond to the plurality of gap regions 23 on a one-to-one basis. Therefore, in the active gas generator 52 of Embodiment 2, the plurality of metal electrodes 10, the plurality of gas supply regions 12R, the plurality of metal electrodes 20, the plurality of gap regions 23, the plurality of discharge spaces 6 and the plurality of high-voltage side grounds
- the metal electrodes 13 are in one-to-one correspondence with each other.
- the corresponding metal electrode 10p, the corresponding gas supply region 12Rp, the corresponding metal electrode 20p, the corresponding gap region 23p, and the corresponding discharge space 6p are defined as a corresponding high-voltage side grounding metal electrode 13p and a corresponding high-voltage side grounding center line L13p.
- FIG. 13 is a cross-sectional view showing a cross-sectional structure of a unidirectional discharge structure 62s in the dielectric barrier discharge structure 61.
- the 'unidirectional discharge structure 62s' means one of the seven discharge spaces 6 each extending in the X direction and classified according to the formation position in the Y direction and the surrounding structure. do.
- FIG. 13 shows an XYZ orthogonal coordinate system.
- the unidirectional discharge structure 62s in the active gas generator 52 of Embodiment 2 has the same structure as the unidirectional discharge structure 61s shown in FIG. However, it differs in that a corresponding high voltage side grounding metal electrode 13p is further provided.
- the corresponding high-voltage side grounding metal electrode 13p (corresponding high-voltage side grounding center line L13p) and the plurality of gas ejection holes 22 provided below the corresponding gap region 23p are shown in plan view. are provided so as to overlap each other.
- the corresponding high-voltage side grounding metal electrode 13p includes the entirety of the plurality of gas ejection holes 22 and overlaps with the plurality of gas ejection holes 22 in plan view.
- a plurality of gas ejection holes 22 provided below the corresponding gap region 23p are present directly below the corresponding high voltage side grounding metal electrode 13p. That is, the corresponding high-voltage-side grounding metal electrode 13p overlaps with a part of the active gas flow path that forms the gas flow 41 of the active gas 8 in plan view.
- the corresponding high-voltage side grounding metal electrode 13p and the corresponding high-voltage side grounding metal electrode 10p It is desirable to provide an interval of about 10 to 15 mm in the Y direction between them.
- the active gas generator 52 of the second embodiment has the same gas ejection hole arrangement structure as in the first embodiment, the active gas having the same radical concentration is evenly distributed over the entire surface area of the wafer 7. can erupt.
- the plurality of gap regions 23 has a pair of chamfered corners C23 as in Embodiment 1.
- the active gas generator 52 of the second embodiment suppresses the deactivation of the active gas 8 and prevents the active gas 8 from deactivating between the plurality of gas ejection holes 22, 22, as in the case of the first embodiment. Uniformity of the gas flow rate can be achieved.
- the plurality of high voltage side grounding metal electrodes 13 serving as the plurality of auxiliary conductive films are provided below the corresponding gap regions 23 among the plurality of gap regions 23 . It has a unique feature that it overlaps with the gas ejection holes 22 of .
- the active gas generator 52 of Embodiment 2 Since the active gas generator 52 of Embodiment 2 has the above-described unique characteristics, the electric field in the active gas flow path above the plurality of gas ejection holes 22 is generated by the high-voltage side grounding metal electrode 13 set to the ground potential. The strength can be reliably relaxed.
- the electric field intensity near the outlets of all the gas ejection holes 22 provided in the plurality of gap regions 23 can be suppressed by the plurality of high voltage side grounding metal electrodes 13 .
- the active gas generator 52 of Embodiment 2 can apply a higher voltage to the plurality of metal electrodes 10, by increasing the discharge power in the plurality of discharge spaces 6, a higher radical The effect of being able to generate the active gas 8 having a concentration is exhibited.
- FIGS. 14 and 15 are plan views each showing a planar structure of a ground potential electrode portion 2C in an active gas generator 53 according to Embodiment 3 of the present disclosure.
- 14 is a plan view seen from above
- FIG. 15 is a plan view seen from below.
- An XYZ orthogonal coordinate system is shown in each of FIGS. 14 and 15 .
- the overall configuration of the active gas generator 53 is the same as that of Embodiment 1 shown in FIGS. 1 and 8, except that the ground potential electrode section 2 is replaced with the ground potential electrode section 2C.
- the same reference numerals as in the first embodiment are assigned to the same constituent parts as in the first embodiment, and the description thereof will be omitted as appropriate.
- the ground potential electrode portion 2C is composed of a plurality of metal electrodes 20 and an electrode dielectric film 21C.
- the electrode dielectric film 21C has a plurality of divided gap region groups 25G instead of the plurality of gap regions 23.
- a plurality of divided gap region groups 25G are arranged apart from each other along the Y direction.
- a plurality of divided gap region groups 25G are provided as a plurality of discharge field forming regions.
- a plurality of divided gap region groups 25G each have a plurality of divided gap regions 25.
- Each of the plurality of divided gap regions 25 has a partial recessed region recessed from the surface, and has a substantially rectangular shape with partially chamfered corners in plan view.
- each divided gap region group 25G has a plurality of partial recessed regions of the plurality of divided gap regions 25 as recessed regions of the discharge field forming region.
- a plurality of divided gap regions 25 are provided along the X direction in each of the plurality of divided gap region groups 25G. Therefore, each of the divided gap region groups 25G is provided extending in the X direction.
- One gas ejection hole 22 is provided below each of the plurality of divided gap regions 25 . That is, the plurality of gas ejection holes 22 penetrate through the electrode dielectric film 21 ⁇ /b>C under the plurality of division gap regions 25 .
- the plurality of divided gap region groups 25G correspond to the plurality of metal electrodes 20 on a one-to-one basis. Therefore, in the active gas generator 53 of Embodiment 3, the plurality of metal electrodes 10, the plurality of gas supply regions 12R, the plurality of metal electrodes 20, the plurality of divided gap region groups 25G (the plurality of discharge field forming regions), and A plurality of discharge spaces 6 correspond to each other on a one-to-one basis.
- the divided gap region groups 25G corresponding to the corresponding metal electrode 10p, the corresponding gas supply region 12Rp, the corresponding metal electrode 20p, and the corresponding discharge space 6p are the corresponding divided gap region groups 25Gp ( corresponding discharge field formation region).
- the plurality of divided gap regions 25 and the plurality of gas supply holes 12 correspond one-to-one
- the plurality of divided gap regions 25 and the plurality of gas ejection holes 22 correspond one-to-one. are doing.
- FIG. 16 is an explanatory diagram schematically showing a planar structure of the unidirectional discharge structure 63s viewed from below.
- FIG. 16 shows an XYZ orthogonal coordinate system.
- the "unidirectional discharge structure 63s" is one type of discharge space 6 (one division gap (corresponding to region group 25G) and its peripheral structure.
- the plurality of gas supply holes 12 formed in the corresponding gas supply region 12Rp and the plurality of gas ejection holes 22 provided in the corresponding divided gap region group 25Gp are viewed from above. are arranged in a one-to-one correspondence along the Y direction with the corresponding discharge space 6p interposed therebetween.
- one split gap region 25 among the plurality of split gap regions 25 and its peripheral structure constitute one unit discharge structure 63t. That is, one unit discharge structure 63 t includes one split gap region 25 among the plurality of split gap regions 25 .
- the split gap region 25a and its peripheral structure, the split gap region 25b and its peripheral structure, and the split gap region 25c and its peripheral structure each constitute one unit discharge structure 63t.
- the plurality of gas ejection holes 22 are provided in one-to-one correspondence with the plurality of divided gap regions 25 .
- the gas ejection holes 22a are provided below the split gap region 25a
- the gas ejection holes 22b are provided below the split gap region 25b
- the gas ejection holes 22c are provided below the split gap region 25c.
- one gas ejection hole 22 is provided in one unit discharge structure 63t.
- a gap S25 exists between the divided gap regions 25a and 25b and between the divided gap regions 25b and 25c. Since the inter-gap space S25 is not recessed from the surface of the electrode dielectric film 21C, the divided gap regions 25a to 25c are formed separately from each other. Therefore, the partial recessed regions of the divided gap regions 25a to 25c form closed spaces without interfering with each other. In this manner, the plurality of divided gap regions 25 are provided separately from each other in each of the plurality of divided gap region groups 25G.
- the above-described one-unit discharge structure 63t satisfies the following arrangement conditions (d) to (f).
- One unit gas ejection hole is provided below (one of the plurality of split gap areas 25) the split gap area 25, and the one unit gas ejection hole is provided below the corresponding split gap area group 25Gp. It is one of the plurality of gas ejection holes 22 .
- the 1-unit supply hole and the 1-unit gas ejection hole are arranged to face each other along the Y direction (first direction) with the corresponding discharge space 6p interposed therebetween in plan view.
- the reason why the condition (d) holds is that the plurality of divided gap regions 25 and the plurality of gas ejection holes 22 correspond one-to-one in the corresponding divided gap region group 25Gp.
- the gas supply hole 12a and the gas ejection hole 22a face each other along the Y direction with the corresponding discharge space 6p interposed therebetween in the split gap region 25a having the independent partial recessed region.
- the gas supply hole 12a becomes a 1-unit gas supply hole
- the gas ejection hole 22a becomes a 1-unit gas ejection hole.
- the gas supply hole 12b and the gas ejection hole 22b face each other across the corresponding discharge space 6p along the Y direction. are opposed to each other along the Y direction with the corresponding discharge space 6p interposed therebetween.
- the gas supply hole 12b becomes one unit gas supply hole
- the gas ejection hole 22b becomes one unit gas ejection hole
- the gas supply hole 12c becomes one unit gas supply hole
- the gas ejection hole 22c becomes one unit gas ejection hole.
- the positions (coordinates) in the X direction are the same between the gas supply holes 12a and the gas ejection holes 22a, the positions in the X direction are the same between the gas supply holes 12b and the gas ejection holes 22b, and the gas supply holes 12c and the gas ejection holes 22c.
- the positions in the X direction are the same between them.
- each of the divided gap regions 25 has a pair of chamfered corners C25 formed by chamfering corners present near the gas ejection holes 22 .
- the split gap region 25 has a substantially rectangular shape in plan view, the active gas 8 may stay at the corners. Therefore, by providing a pair of chamfered corners C25 as a narrowed structure in the divided gap region 25, the chamfered corners C25 guide the active gas 8 to the gas ejection holes 22 which are one unit gas ejection holes.
- the unidirectional discharge structure 63s satisfies the above-described arrangement conditions (a) to (c) as in the active gas generator 51 of Embodiment 1.
- the active gas having the same radical concentration can be evenly ejected from each of all the gas ejection holes 22 provided below the divided gap region group 25G.
- the active gas generator 53 of Embodiment 3 has the same gas ejection hole arrangement structure as in Embodiment 1, the active gas having the same radical concentration is evenly applied to the entire surface area of the wafer 7. can erupt.
- the plurality of divided gap regions 25 are provided separately from each other, and the single unit discharge structure 63t including one divided gap region 25 is arranged under the above-described arrangement condition (d ) to (f) are satisfied. Therefore, the raw material gas and the active gas do not interfere between the divided gap regions 25 , 25 adjacent to each other among the plurality of divided gap regions 25 .
- the active gas generator 53 of Embodiment 3 can more uniformly eject active gas from each of the plurality of gas ejection holes 22 .
- each of the plurality of divided gap regions 25 has a pair of chamfered corners C25 as a narrowing structure, so that the flow of the active gas 8 is smoothed and the above-mentioned one unit It can lead to gas orifices.
- the active gas generator 53 of Embodiment 3 can reliably suppress deactivation of the active gas.
- the high voltage applying electrode portion 1B having a plurality of high voltage side grounding metal electrodes 13 is replaced with the high voltage applying electrode portion 1B. It may be replaced with 1.
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Abstract
Description
活性ガスは寿命が大変短く短時間で失活するため、処理対象基板となるウェハーが配置される処理空間の近傍で活性ガスを生成して、ウェハーに吹付ける必要がある。また、ウェハー上に成膜される膜の均一性を保つためには活性ガスをウェハーに均等に吹付けなくてはならない。
図1は本開示の実施の形態1である活性ガス生成装置51の全体構成を示す説明図である。図1にXYZ直交座標系を記している。同図に示すように、活性ガス生成装置51は、金属製の発生器カバー3内に設けられる誘電体バリア放電構造61と、成膜室となるチャンバー4と、真空ポンプ45と、高周波電源100とを主要構成要素として含んでいる。
実施の形態1の活性ガス生成装置51における1方向放電構造61sは、上述した配置条件(a)~(c)を満足している。このため、複数のギャップ領域23それぞれに関し、以下の第1及び第2の要因から、複数のガス噴出孔22それぞれから、等しいラジカル濃度の活性ガスを噴出することができる。
図11は本開示の実施の形態2である活性ガス生成装置52における高電圧印加電極部1Bの平面構造を示す平面図である。図12は活性ガス生成装置52における接地電位電極部2の平面構造を示す平面図である。図11及び図12はそれぞれ上方から視た平面図である。図11及び図12それぞれにXYZ直交座標系を記している。
実施の形態2の活性ガス生成装置52における1方向放電構造62sは実施の形態1の1方向放電構造61sと同様、上述した配置条件(a)~(c)を満足しているため、複数のギャップ領域23の下方に設けられる全てのガス噴出孔22それぞれから等しいラジカル濃度の活性ガスを均等に噴出することができる。
図14及び図15はそれぞれ本開示の実施の形態3である活性ガス生成装置53における接地電位電極部2Cの平面構造を示す平面図である。図14は上方から視た平面図であり、図15は下方から視た平面図である。図14及び図15それぞれにXYZ直交座標系を記している。
実施の形態3の活性ガス生成装置53は、実施の形態1の活性ガス生成装置51と同様に1方向放電構造63sが上述した配置条件(a)~(c)を満足しているため、複数の分割ギャップ領域群25Gの下方に設けられる全てのガス噴出孔22それぞれから等しいラジカル濃度の活性ガスを均等に噴出することができる。
本開示は詳細に説明されたが、上記した説明は、すべての局面において、例示であって、本開示がそれに限定されるものではない。例示されていない無数の変形例が、本開示の範囲から外れることなく想定され得るものと解される。
2,2C 接地電位電極部
3 発生器カバー
4 チャンバー
5 原料ガス
6 放電空間
6p 対応放電空間
7 ウェハー
10,20 金属電極
10p,20p 対応金属電極
12 ガス供給孔
12R ガス供給領域
12Rp 対応ガス供給領域
11,21 電極用誘電体膜
13 高圧側接地用金属電極
13p 対応高圧側接地用金属電極
22 ガス噴出孔
23 ギャップ領域
23p 対応ギャップ領域
25 分割ギャップ領域
25G 分割ギャップ領域群
25Gp 対応分割ギャップ領域群
51~53 活性ガス生成装置
C23,C25 面取り角部
Claims (6)
- 放電空間に供給された原料ガスを活性化して得られる活性ガスを生成する活性ガス生成装置であって、
第1の電極構成部と
前記第1の電極構成部の下方に設けられる第2の電極構成部とを備え、
前記第1の電極構成部は、第1の電極用誘電体膜と前記第1の電極用誘電体膜の上面上に形成される複数の第1の金属電極とを有し、
前記第2の電極構成部は、第2の電極用誘電体膜と前記第2の電極用誘電体膜の下面上に形成される複数の第2の金属電極とを有し、
前記複数の第1の金属電極に交流電圧が印加され、前記複数の第2の金属電極が基準電位に設定され、
前記第1の電極用誘電体膜は、第1の方向に沿って配置される複数のガス供給領域を有し、前記複数のガス供給領域はそれぞれ第2の方向に沿って均等間隔で設けられる複数のガス供給孔を有し、前記第2の方向は前記第1の方向と交差し、
前記複数の第1の金属電極は前記第1の方向に沿って配置され、前記複数の第1の金属電極はそれぞれ前記第2の方向に延びて形成され、
前記第2の電極用誘電体膜は、前記第1の方向に沿って配置される複数の放電場形成領域を有し、前記複数の放電場形成領域はそれぞれ前記第2の電極用誘電体膜の表面から凹んだ凹み領域を有し、かつ、前記第2の方向に延びて設けられ、前記複数の放電場形成領域それぞれの下方に複数のガス噴出孔が設けられ、前記複数のガス噴出孔は前記第2の方向に沿って均等間隔で設けられ、
前記複数の第2の金属電極は前記第1の方向に沿って配置され、前記複数の第2の金属電極はそれぞれ前記第2の方向に延びて形成され、
前記放電空間は複数の放電空間を含み、
前記複数の第1の金属電極、前記複数のガス供給領域、前記複数の第2の金属電極、前記複数の放電場形成領域及び前記複数の放電空間は互いに1対1に対応し、
前記複数の第1の金属電極、前記複数の第2の金属電極、前記複数のガス供給領域、前記複数の放電場形成領域及び前記複数の放電空間のうち、対応する第1の金属電極、第2の金属電極、ガス供給領域、放電場形成領域及び放電空間が、第1の対応金属電極、第2の対応金属電極、対応ガス供給領域、対応放電場形成領域及び対応放電空間として定義され、
前記第1の対応金属電極、前記第2の対応金属電極、前記対応ガス供給領域、前記対応放電場形成領域及び前記対応放電空間を含んで前記第2の方向に沿った1方向放電構造が構成され、
前記1方向放電構造は、以下の配置条件(a)~(c)を満足する、
(a) 前記対応放電場形成領域内において、前記第1の対応金属電極と前記第2の対応金属電極とが平面視して重複する領域が前記対応放電空間となる、
(b) 前記対応放電場形成領域と前記対応ガス供給領域に設けられる前記複数のガス供給孔とが平面視して重複する、
(c) 前記対応ガス供給領域に設けられる前記複数のガス供給孔と前記対応放電場形成領域下に設けられる前記複数のガス噴出孔とが平面視して前記対応放電空間を挟み、前記第1の方向に沿って1対1に対向して配置される、
活性ガス生成装置。 - 請求項1記載の活性ガス生成装置であって、
前記第2の電極用誘電体膜の下方において、処理対象基板を載置する載置部をさらに備え、
前記複数の放電場形成領域それぞれの下方に設けられる前記複数のガス噴出孔は、前記第2の方向の両端に存在する一対の端部ガス噴出孔を含み、前記複数の放電場形成領域それぞれにおいて、前記一対の端部ガス噴出孔は平面視して前記処理対象基板と重複することなく、前記処理対象基板の表面より外側に配置されることを特徴とする、
活性ガス生成装置。 - 請求項1または請求項2に記載の活性ガス生成装置であって、
前記第1の電極用誘電体膜の上面上に形成される複数の補助導電膜をさらに備え、前記複数の補助導電膜は前記複数の第1の金属電極から独立して設けられ、かつ、前記基準電位に設定され、
前記複数の補助導電膜は前記複数の放電場形成領域と1対1に対応し、
前記複数の補助導電膜はそれぞれ前記複数の放電場形成領域のうち対応する放電場形成領域に設けられる前記複数のガス噴出孔と平面視して重複していることを特徴とする、
活性ガス生成装置。 - 請求項2記載の活性ガス生成装置であって、
前記複数の放電場形成領域は、各々の前記凹み領域が前記第2の方向に連続的に形成される複数のギャップ領域であり、
前記複数のギャップ領域はそれぞれ
活性ガスの流れを前記一対の端部ガス噴出孔に導く絞り込み構造を有する、
活性ガス生成装置。 - 請求項1から請求項3のうち、いずれか1項に記載の活性ガス生成装置であって、
前記複数の放電場形成領域は、各々が複数の分割ギャップ領域を含む複数の分割ギャップ領域群であり、前記複数の分割ギャップ領域はそれぞれ前記第2の電極用誘電体膜の表面から凹んだ部分凹み領域を有し、前記凹み領域は前記複数の分割ギャップ領域が有する複数の部分凹み領域を含み、
前記複数の分割ギャップ領域は互いに離散して設けられ、前記複数の分割ギャップ領域のうち1つの分割ギャップ領域を含んで1単位放電構造が構成され、
前記1単位放電構造は以下の配置条件(d)~(f)を満足する、
(d) 前記1つの分割ギャップ領域の下方に1単位ガス噴出孔が設けられ、前記1単位ガス噴出孔は前記対応放電場形成領域の下方に設けられる前記複数のガス噴出孔のうちの1つであり、
(e) 前記1つの分割ギャップ領域に平面視重複して1単位ガス供給孔が設けられ、前記1単位ガス供給孔は、前記対応ガス供給領域に設けられる前記複数のガス供給孔のうちの1つであり、
(f) 前記1単位ガス供給孔と前記1単位ガス噴出孔とが平面視して前記対応放電空間を挟み、前記第1の方向に沿って対向して配置される、
活性ガス生成装置。 - 請求項5記載の活性ガス生成装置であって、
前記複数の分割ギャップ領域はそれぞれ
活性ガスの流れを前記1単位ガス噴出孔に導く絞り込み構造を有する、
活性ガス生成装置。
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JP (1) | JP7220973B1 (ja) |
KR (1) | KR20230108322A (ja) |
CN (1) | CN116670324A (ja) |
TW (1) | TWI847337B (ja) |
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CN116670324A (zh) | 2023-08-29 |
TWI847337B (zh) | 2024-07-01 |
JPWO2023105682A1 (ja) | 2023-06-15 |
JP7220973B1 (ja) | 2023-02-13 |
TW202347490A (zh) | 2023-12-01 |
US20240062994A1 (en) | 2024-02-22 |
KR20230108322A (ko) | 2023-07-18 |
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