WO2012098730A1 - 液体気化器 - Google Patents
液体気化器 Download PDFInfo
- Publication number
- WO2012098730A1 WO2012098730A1 PCT/JP2011/069960 JP2011069960W WO2012098730A1 WO 2012098730 A1 WO2012098730 A1 WO 2012098730A1 JP 2011069960 W JP2011069960 W JP 2011069960W WO 2012098730 A1 WO2012098730 A1 WO 2012098730A1
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- WO
- WIPO (PCT)
- Prior art keywords
- chemical solution
- vaporization
- mesh
- mixed gas
- liquid
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01B—BOILING; BOILING APPARATUS ; EVAPORATION; EVAPORATION APPARATUS
- B01B1/00—Boiling; Boiling apparatus for physical or chemical purposes ; Evaporation in general
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01B—BOILING; BOILING APPARATUS ; EVAPORATION; EVAPORATION APPARATUS
- B01B1/00—Boiling; Boiling apparatus for physical or chemical purposes ; Evaporation in general
- B01B1/005—Evaporation for physical or chemical purposes; Evaporation apparatus therefor, e.g. evaporation of liquids for gas phase reactions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/14—Evaporating with heated gases or vapours or liquids in contact with the liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
- B01F23/12—Mixing gases with gases with vaporisation of a liquid
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
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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
- C23C16/4481—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 evaporation using carrier gas in contact with the source material
- C23C16/4482—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 evaporation using carrier gas in contact with the source material by bubbling of carrier gas through liquid source material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
Definitions
- the present invention relates to a liquid vaporizer that vaporizes a chemical solution.
- wafer surface treatment is performed in order to improve the adhesion of the resist solution to the wafer.
- the surface treatment of the wafer is performed by vaporizing a chemical solution for changing a hydrophilic surface to hydrophobicity and applying the chemical solution to the wafer in the chamber.
- a chemical solution for changing a hydrophilic surface to hydrophobicity As this kind of vaporizer, what vaporizes the chemical
- the vapor of the chemical solution vaporized at room temperature is transported from the storage tank to the chamber together with nitrogen gas using, for example, a resin tube.
- Such a storage tank generally has to be enlarged, it cannot be placed in the vicinity of the chamber, and is placed in a place far away (for example, 5 m or more). Since the chemical vapor easily causes condensation within the resin tube, heating of the resin tube for long-distance transportation is required. On the other hand, the bubbling of the chemical solution by nitrogen gas evaporates at room temperature, so that the problem of dew condensation is significant and the chemical solution is deteriorated by exposure to nitrogen gas.
- Patent Document 2 As a method for vaporizing a chemical solution, there is a method in which the chemical solution is vaporized with high efficiency by increasing the surface area of the chemical solution by mist.
- Patent Document 3 a method of utilizing the separation function of the mesh, in zero gravity (or under microgravity), the liquid layer and the gas phase are separated by a mesh that allows only gas to pass through, and vaporization is performed by vapor pressure by heating from the separation surface.
- Patent Document 3 The method of making it also has been proposed.
- JP-A-6-132209 JP 2008-263244 A Japanese Patent Laid-Open No. 05-156448
- the vaporizer in any of the methods, the vaporizer must be enlarged and cannot be disposed in the vicinity of the chamber. Therefore, it is common in that heating to a long resin tube for conveying the mixed gas is required.
- the present invention was created in order to solve at least a part of the above-described conventional problems, and an object thereof is to provide a small vaporizer.
- a liquid vaporizer that vaporizes a chemical solution supplied from a chemical solution supply port and mixes it with a medium gas, A gas inlet for introducing the medium gas, a mixed gas generation space for generating a mixed gas by mixing the chemical solution vaporized into the medium gas introduced from the gas inlet, and discharging the mixed gas
- a vaporizer body having a gas outlet;
- a vaporization unit that is disposed inside the mixed gas generation space and vaporizes the supplied chemical liquid;
- the vaporization part has a vaporization part main body in which a vaporization surface is formed, and a mesh body formed into a planar shape by knitting a wire rod regularly in a mesh shape,
- the mesh body is a space surrounded by the wire, and forms a plurality of mesh spaces regularly arranged in an in-plane direction of the mesh body,
- the vaporization portion is a space surrounded by the wire and the vaporization surface by the mesh body and the vaporization surface coming into contact with each other, and is regularly
- Means 1 has a net-like body formed into a planar shape by regularly knitting a wire rod into a net-like shape. Since the mesh body forms a plurality of mesh spaces regularly arranged in the in-plane direction, the capillary action of the mesh body is realized so as to realize a uniform thin film state of the chemical solution in the surface of the mesh body. Can work. This is because the plurality of mesh spaces form a film of the chemical solution by causing capillary action by the intermolecular force between the chemical solution and the wire. Thus, if a uniform thin film state of the chemical solution can be formed by a plurality of mesh spaces, the surface area of the chemical solution can be remarkably increased, thereby realizing a large amount of vaporization.
- the chemical solution supply space is formed as a space surrounded by the wire and the vaporized surface by the mesh body and the vaporized surface coming into contact with each other. Since the chemical solution supply space is regularly arranged in the in-plane direction of the mesh body, the chemical solution is mainly distributed in the in-plane direction (two-dimensional direction) of the mesh body along the wire and the vaporized surface by the following two mechanisms. It can be supplied uniformly.
- the first reason is that at the position where the vertical wire extending in one direction intersects the horizontal wire extending in the other direction, either the vertical wire or the horizontal wire is separated from the vaporization surface. This is because the space where the water flows is secured. Thereby, a chemical
- the second reason is that the flow of the chemical solution can be smoothly branched into the flow along the vertical wire and the flow along the horizontal wire at each crossing position of the vertical wire and the horizontal wire. This is because the chemical solution is supplied to. Thereby, a chemical
- the vaporization part of the means 1 has a synergistic action of a plurality of mesh spaces (thin film forming function) and chemical solution supply space (chemical solution supply function) regularly arranged in the in-plane direction of the network.
- a uniform thin film state of the chemical solution can be maintained under transpiration.
- This configuration is realized by the regularity of the outer shape of the net-like body formed into a planar shape by knitting a wire rod in a regular manner.
- the mesh space and the chemical solution supply space are regularly arranged in the in-plane direction of the mesh body, so that uniform flow due to capillary inflow Formation of a thin film and uniform supply of a chemical solution are realized.
- Such a configuration is essentially different from a method in which a tube portion is randomly formed in three dimensions by using a collection of foams and granular materials, thereby expanding the vaporization surface of the chemical solution. Furthermore, this means does not exist in the prior art such as solving the problem of deterioration of chemicals due to the remaining of chemicals inside the aggregate of foams and granular materials, remarkable efficiency of vaporization, and miniaturization accompanying the efficiency of vaporization. An advantageous effect can be produced.
- the chemical solution supply space has a broad meaning and does not necessarily need to form a closed space completely surrounded by the wire and the vaporized surface, and may be partially cut off.
- a space in which the wire is regularly close to the vaporization surface and partially cut is included in the chemical supply space. This is because the space surrounded by a part cut off also allows the chemical solution to pass through and causes capillary action.
- the cross-sectional shape of the wire does not necessarily have to be a perfect circle, and may be an ellipse or a polygon (such as a quadrangle or a hexagon).
- the contact may be realized by a method such as a magnetic force, an adhesive force, or pressure application by a structural member having a coarse structure, or may be generated as follows.
- the vaporization surface is formed as a part of the outer peripheral surface of the columnar body,
- the vaporization surface is formed as a part of the outer peripheral surface of the columnar body, and the net-like body is wound along the outer peripheral direction of the columnar body.
- the mesh body can be smoothly wound around the outer peripheral surface without a gap. Thereby, contact
- Means 3 The liquid vaporizer according to claim 2, wherein the vaporizing section includes a tension generating section that generates tension in the mesh body along an outer peripheral direction of the columnar body.
- the vaporizing section has a tension generating section that generates tension in the mesh body along the outer peripheral direction of the columnar body, the network structure is caused by changes in the thermal environment or aging (for example, plastic deformation or creep of the mesh body). Looseness can be suppressed. Thereby, the mutual contact
- the vaporizing surface includes a continuous curved surface formed by connecting convex surfaces protruding in an out-of-plane direction on the mesh body side,
- the said vaporization part produces
- the mesh body and the vaporized surface are brought into contact with each other by generating a tension on the mesh body along the convex continuous curved surface protruding in the out-of-plane direction on the mesh body side. Uniform contact can be achieved by suppressing the loosening and wrinkling of the mesh.
- a shape of the continuous curved surface for example, a three-dimensional shape such as a hemisphere or a columnar shape can be used.
- the vaporization surface includes a chemical solution supply surface that is a plane to which the chemical solution is supplied, and a pair of continuous curved surfaces that are continuous with the plane at a position sandwiching the chemical solution supply surface,
- the vaporizing unit generates a tension with respect to the mesh body along the pair of continuous curved surfaces, thereby bringing the mesh body into contact with a plane sandwiched between the pair of continuous curved surfaces.
- the chemical solution supply surface sandwiched between the continuous curved surfaces and the mesh body are brought into contact with each other.
- a wide vaporization surface can be formed.
- Means 6 A chemical solution outlet for supplying the chemical solution to the vaporization surface;
- the liquid vaporizer according to any one of means 1 to 5, wherein the chemical liquid discharge port is formed on a vaporization surface in contact with the mesh body.
- the chemical solution supply port is formed on the vaporized surface in contact with the mesh body, the chemical solution can be supplied to the gap between the vaporized surface and the mesh body. Since the gap between the vaporization surface and the mesh body is surrounded by the chemical solution holding space and formed as a collection of chemical solution supply spaces, in a state where the scattering of the chemical solution is suppressed by the surface tension in the chemical solution holding space, The chemical liquid can be smoothly supplied to the chemical liquid supply space.
- Mean 7 A chemical solution outlet for supplying the chemical solution to the vaporization surface;
- the chemical solution outlet is disposed at a position away from the mesh body by a predetermined distance in the out-of-plane direction of the mesh body.
- the liquid vaporizer according to any one of means 1 to 5, wherein the predetermined distance is a distance shorter than a diameter of a chemical liquid droplet formed at the chemical liquid discharge port by surface tension.
- the chemical liquid discharge port is arranged at a distance closer to the network than the diameter of the liquid droplet of the chemical liquid formed at the chemical liquid discharge port by the surface tension, the liquid droplets formed at the tip of the chemical liquid discharge port It is possible to suppress the generation of particles due to the adhesion of the chemical liquid around the chemical liquid discharge port. This is because the net-like body can suppress the generation of excessive droplets by sucking the chemical solution by capillary action.
- Means 8 The liquid vaporizer according to means 6 or 7, wherein the vaporizing unit main body has a heating unit inside the vaporizing unit main body.
- the heating part since the heating part is provided inside the vaporization part main body, heat can be efficiently supplied to the region where the vaporization surface formed in the vaporization part main body and the mesh body are in contact with each other. .
- the vaporizing unit main body is A control valve for controlling the supply of the chemical liquid to the chemical liquid discharge port; A chemical solution discharge passage connecting the chemical solution discharge port and the control valve; A plurality of heating units arranged at positions sandwiching the chemical liquid discharge flow path;
- the liquid vaporizer according to claim 6, comprising:
- the supply of the chemical solution can be shut off in the vicinity of the chemical solution discharge port, the supply of the chemical solution is caused by the problem that the chemical solution is delayed after the supply of the chemical solution is stopped or the generation of bubbles in the chemical solution supply path. Variation in the amount can be suppressed. Since this means further includes a pair of heating units arranged at positions sandwiching the chemical solution discharge flow path, the chemical solution inside the flow channel in the range leading to the chemical solution discharge port after the chemical solution is blocked can be vaporized almost without delay. Can do. Thereby, accurate supply of the chemical solution can be realized.
- the vaporizer main body has an outer tube portion forming the mixed gas generation space as a columnar space having a first columnar shape
- the vaporization unit main body is a tube part that is disposed inside the mixed gas generation space and has a second columnar shape with an axis parallel to the axis of the first columnar shape, and the second columnar shape It has an inner tube part in which a chemical liquid supply channel in the axial direction of the shape is formed,
- a valve actuator that is attached to the inner pipe portion through the outer pipe portion in a direction perpendicular to the axis of the first columnar shape;
- the valve actuator includes a valve body that controls a communication state between the chemical solution supply channel and the chemical solution discharge channel.
- the means 10 has a double tube structure consisting of a vaporizer body having an outer tube portion for conveying a medium gas and a vaporizer portion body having an inner tube portion for conveying a chemical solution, so that it is mounted with high volumetric efficiency. Is possible.
- the inner pipe portion is mounted with a shutoff valve that is integrally formed by using a valve actuator to further increase the volumetric efficiency. Since the valve actuator is mounted in a direction perpendicular to the axis of the double pipe structure, the valve actuator can be mounted without increasing the total length in the axis direction of the double pipe structure.
- Means 11 The liquid vaporizer according to claim 10, wherein the chemical liquid discharge port is disposed between the gas inlet and the gas outlet in the axial direction of the first columnar shape.
- the chemical solution discharge port is disposed between the gas supply port and the gas discharge port in the axial direction of the first columnar shape, the vaporized chemical solution is efficiently removed at the time of supplying the chemical solution.
- the mixed gas can be mixed with the medium gas, and the mixed gas in the mixed gas generation space can be purged after the supply of the chemical liquid is stopped.
- the gas discharge port is a space formed in a gap between the bottom surface of the mixed gas generation space of the columnar space of the first columnar shape and the bottom surface of the vaporization unit main body in the axial direction of the first columnar shape.
- At least a part of the gas discharge port communicates with a space formed in a gap between the bottom surface of the mixed gas generation space and the bottom surface of the vaporization unit main body in the axial direction of the first columnar shape. Therefore, it is possible to further improve the efficiency of purging in the downstream region where stagnation is likely to occur in the mixed gas generation space.
- the direction perpendicular to the axial direction may be used. This makes it possible to improve the efficiency of purging while ensuring the degree of freedom of mounting.
- a liquid vaporizer that vaporizes a chemical solution supplied from a chemical solution supply port and mixes it with a medium gas
- a vaporizer body having a mixed gas generation space for mixing the vaporized chemical liquid with a medium gas to generate a mixed gas
- a vaporization unit that is disposed inside the mixed gas generation space and vaporizes the supplied chemical liquid
- the vaporization part has a vaporization part main body in which a vaporization surface is formed, and a mesh body formed into a planar shape by knitting a wire rod regularly in a mesh shape,
- the vaporization unit main body includes a heating unit that heats the vaporization surface from the inside of the vaporization unit main body, a medium gas channel that circulates the medium gas, and the medium gas that circulates through the medium gas channel.
- a gas introduction port for introducing into the generation space, a gas discharge port for discharging the mixed gas from the mixed gas generation space, and a mixed gas flow path for circulating the mixed gas discharged from the discharge port
- the mesh body is a space surrounded by the wire, and forms a plurality of mesh spaces regularly arranged in an in-plane direction of the mesh body
- the vaporization portion is a space surrounded by the wire and the vaporization surface by the mesh body and the vaporization surface coming into contact with each other, and is regularly arranged in the in-plane direction of the mesh body.
- a liquid vaporizer forming a plurality of chemical solution supply spaces.
- the vaporizing unit main body since the vaporizing unit main body has a heating unit that heats the vaporizing surface from the inside of the vaporizing unit main body, the temperature of the vaporizing unit main body is increased by heating the vaporizing surface by the heating unit. And the vaporization part main body has the medium gas flow path which distribute
- the vaporization part main body has the gas exhaust port which discharges mixed gas from mixed gas production
- Means 14. The liquid vaporizer according to means 13, wherein the medium gas channel and the mixed gas channel are provided along the heating unit.
- the temperature of the medium gas channel and the mixed gas channel can be increased efficiently. Therefore, the heating of the medium gas when passing through the medium gas flow path and the heating of the mixed gas when passing through the mixed gas flow path can be further promoted.
- Means 15 A chemical solution outlet for supplying the chemical solution to the vaporization surface;
- the chemical solution discharge port for supplying the chemical solution to the vaporization surface is disposed between the gas introduction port and the gas discharge port, the vaporized chemical solution is efficiently converted into the medium gas when supplying the chemical solution.
- the gas mixture can be mixed, and after the chemical liquid supply is stopped, the mixed gas in the mixed gas generation space can be efficiently purged.
- the tension generator includes a recess formed on the outer peripheral surface of the columnar body so as to extend linearly in the axial direction of the columnar body, and the carburetor body and the mesh body so as to engage with the recess.
- the means 16 it is possible to generate tension in the mesh body along the outer peripheral surface of the columnar body with a simple configuration, and it is possible to suppress the displacement of the insertion member by the recess.
- FIG. 2 is an exploded perspective view showing a schematic configuration of a liquid vaporizer 100.
- FIG. 3 is an enlarged cross-sectional view showing the internal configuration of the liquid vaporizer 100.
- FIG. 3 is an enlarged cross-sectional view showing the internal configuration of the liquid vaporizer 100.
- Sectional drawing which shows the mounting state of heater 131,132 and temperature sensor 133,134.
- FIG. 3 is an exploded cross-sectional view showing the internal configuration of the liquid vaporizer 100.
- the top view which shows the external appearance of the vaporization part 120.
- FIG. The front view which shows the external appearance of the vaporization part 120.
- FIG. 3 is a component diagram showing a vaporizing unit main body 121, a cylindrical mesh 60, and a tension generating member 141 constituting the vaporizing unit 120.
- the external appearance perspective view which shows the state in the middle of the vaporization part 120 being assembled.
- FIG. 3 is an enlarged plan view showing a configuration of a net-like body 69 that forms a cylindrical mesh 60.
- Sectional drawing which shows the structure of the contact state of the cylindrical mesh 60 and the vaporization surface 87.
- FIG. Sectional drawing which shows the structure of the contact state of the cylindrical mesh 60 and the vaporization surface 87.
- FIG. The figure which shows the structure of the liquid vaporizer 200.
- the enlarged view which shows the fixed state of the mesh 260.
- FIG. 1 is a diagram illustrating a configuration of a liquid vaporization system 10 and a hydrophobization processing chamber 30 according to an embodiment.
- the liquid vaporization system 10 is a system that vaporizes a chemical solution to generate a mixed gas with nitrogen gas and supplies the mixed gas to the hydrophobic treatment chamber 30.
- the hydrophobization processing chamber 30 is a device that applies (spreads) a mixed gas supplied as a pretreatment for applying a resist solution onto the surface of a semiconductor wafer W (hereinafter referred to as a wafer for short) in a photolithography process.
- a hydrophobizing treatment solution (hexamethyldisilazane: HMDS) that improves the adhesion of the resist solution is used.
- the mixed gas does not necessarily need to use nitrogen gas, and may be another medium gas.
- the liquid vaporization system 10 includes a liquid tank X that stores a chemical solution, an intake flow path 15, a discharge flow path 17, a nitrogen gas supply path 18, a liquid vaporizer 20, and a controller 40 that controls the liquid vaporizer 20. And an electro-pneumatic regulator 41.
- the liquid vaporizer 20 vaporizes the chemical liquid from the liquid tank X via the suction flow path 15 and then vaporizes it, mixes it with the nitrogen gas supplied from the nitrogen gas supply path 18, and mixes it with the nitrogen gas supplied from the nitrogen gas supply path 18. 30.
- the liquid vaporizer 20 includes a suction side valve 13 provided in the suction flow path 15, a pump 11, a liquid vaporizer 100, and a discharge flow path 16 that discharges a chemical from the pump 11 to the liquid vaporizer 100.
- the pump 11 is a pump that sucks the chemical liquid from the liquid tank X through the suction flow path 15 and supplies the chemical liquid to the liquid vaporizer 100 from the discharge flow path 16.
- the pump 11 is a diaphragm pump that is driven by the working air supplied from the working air supply source 42 via the electropneumatic regulator 41.
- the electropneumatic regulator 41 is controlled by the controller 40 in cooperation with the suction side valve 13 and the discharge side valve (described later) of the liquid vaporizer 100.
- the electropneumatic regulator 41 is also used to shut off the chemical solution inside the liquid vaporizer 100.
- FIG. 2 is an exploded perspective view showing a schematic configuration of the liquid vaporizer 100.
- FIG. 3 is a longitudinal sectional view showing the internal configuration of the liquid vaporizer 100.
- FIG. 4 is a bottom view showing the appearance of the liquid vaporizer 100.
- the liquid vaporizer 100 includes a vaporizer main body 110, a vaporization unit 120, a chemical solution introduction member 125, two heaters 131 and 132, a valve actuator 150, and temperature sensors 133 and 134.
- the vaporizer main body 110 includes a concave member 111 in which a columnar concave portion 119 and a valve actuator mounting hole 118 communicating with the columnar concave portion 119 are formed, and a lid member 112 that seals the columnar concave portion 119 from the outside of the vaporizer main body 110. It has.
- the valve actuator mounting hole 118 is formed as a cylindrical through hole for mounting the valve actuator 150 that communicates perpendicularly to the axial direction of the columnar shape of the columnar recess 119.
- the liquid vaporizer 100 is assembled by the following method. (1) The lid member 112 is attached to the vaporization unit 120. (2) The lid member 112 is temporarily fixed to the concave member 111. (3) The valve actuator 150 is attached to the vaporization unit 120 and the concave member 111. (4) The lid member 112 is fastened to the concave member 111. (5) Two temperature sensors 133 and 134 are attached to the vaporization unit 120. (6) Two heaters 131 and 132 are attached to the vaporization unit 120. (7) The chemical solution introduction member 125 is attached to the lid member 112.
- the attachment of the lid member 112 to the vaporization unit 120 is performed as follows.
- the lid member 112 and the vaporizing section 120 are mounted by positioning using a pair of pins 51 and 52 and fastening using a pair of through bolts 53 and 54.
- the pin 51 is inserted into the positioning hole P1 of the lid member 112 and the positioning hole P3 of the vaporizing portion 120
- the pin 52 is inserted into the positioning hole P2 of the lid member 112 and the positioning hole P4 of the vaporizing portion 120. Is done by.
- Fastening is performed by passing a pair of through-bolts 53 and 54 through the burr holes B3 and B4 of the vaporizing section 120 and screwing them into the screw holes B1 and B2 of the lid member 112, respectively.
- Temporary fixing of the lid member 112 to the concave member 111 is performed as follows.
- the concave member 111 is placed so that the opening of the columnar concave portion 119 faces upward in the vertical direction.
- the lid member 112 is brought into contact with the contact surface 111 s of the concave member 111 while inserting the vaporizing portion 120 into the columnar concave portion 119 from above in the vertical direction.
- Four bolts 55 are inserted into the holes B5 to B8 of the lid member 112 and screwed into the four screw holes h5 to h8 formed in the concave member 111. However, the four bolts B55 are loosely attached as temporarily fixed.
- the attachment of the valve actuator 150 to the vaporization part 120 and the concave member 111 is performed as follows.
- the valve actuator 150 passes through the valve actuator mounting hole 118 of the concave member 111 and is mounted on the vaporization unit 120 (see FIGS. 3 and 4).
- the vaporizing portion 120 is already assembled to the concave member 111 through the lid member 112. However, since it is in a temporarily fixed state, the assembly tolerance is absorbed to facilitate the insertion and fastening of the valve actuator 150 into the vaporizing portion 120. be able to. As a result, the valve actuator 150 is attached to the concave member 111 and the vaporizing unit 120.
- the lid member 112 is fastened to the concave member 111 by fastening four bolts 55 (see FIG. 2).
- the valve actuator 150 slightly moves with respect to the valve actuator mounting hole 118 due to an assembly error.
- the seal between the valve actuator 150 and the valve actuator mounting hole 118 is maintained by elastic deformation of the O-ring.
- the diameter of the valve actuator mounting hole 118 is set to be slightly larger than the diameter of the valve actuator 150 in consideration of assembly tolerances.
- FIG. 5 is a cross-sectional view showing how the heaters 131 and 132 and the temperature sensors 133 and 134 are attached to the liquid vaporizer 100.
- the two heaters 131 and 132 are attached to the vaporizing unit 120 through the through holes h1 and h2 (see FIG. 2) of the lid member 112 and attached to the mounting holes h3 and h4 of the vaporizing unit 120.
- the temperature sensors 133 and 134 are connected to the controller 40, pass through the through holes h 9 and h 10 of the valve actuator 150, and are mounted in the mounting holes h 11 and h 12 of the vaporization unit 120.
- the temperature sensors 133 and 134 have heat sensitive parts 135 and 136 at the innermost part of the mounting holes h11 and h12 in the mounted state.
- the heat sensitive part 135 is arranged closer to the vaporization surface 87 than the heater 131.
- the heat sensitive part 136 is arranged closer to the vaporization surface 87 than the heater 132.
- the controller 40 can monitor a vaporization state by detecting a minute temperature change resulting from the start or end of vaporization.
- the controller 40 energizes the heaters 131 and 132 so that the temperature of the vaporization surface 87 is stabilized at a temperature of about 70 to 100 degrees.
- the mixed gas generation space 116 is formed as described below as a space surrounded by the inner wall of the columnar recess 119, the outer surface of the vaporization unit 120, and the outer surface of the valve actuator 150.
- the inner wall of the columnar recess 119 includes a pair of semicircles 71 and 72 disposed at positions facing each other, and a pair of parallel lines 75 and 76 connecting the pair of semicircles 71 and 72.
- a valve actuator mounting hole 118 is formed in the bottom surface 78 and communicates with the columnar recess 119. Note that the inner wall of the columnar recess 119 is also referred to as a columnar space having a first columnar shape.
- the outer surface of the vaporizing unit 120 has a pair of semicircles 81 and 82 disposed at positions facing each other, and an upper straight line 85 and a lower curve 86 that connect the pair of semicircles 81 and 82. It is formed as a columnar body having a bottom surface S2 (see FIG. 2) surrounded by.
- the pair of semicircles 81 and 82 is configured as a semicircle having a radius smaller than the pair of semicircles 71 and 72 by a clearance C (coaxial line).
- the outer surface of the vaporization part 120 is also expressed as having a second columnar shape.
- the upper straight line 85 is disposed at a position closer to the parallel line 76 by the clearance C than the parallel line 75 (vertically below), and shifted from the parallel line 75 to the lid member 112 side. It is a straight line.
- the lower curve 86 is a position (vertically upward) that is closer to the parallel line 75 by the clearance C than the parallel line 76, and is a straight line 86a, 86c that is shifted from the parallel line 76 to the lid member 112 side. (See FIG. 2) and a curved line 86b formed in a concave shape on the upper straight line 85 side.
- the vaporization unit 120 includes a pair of outer peripheral surfaces 83 and 84 (see FIG. 5) corresponding to the pair of semicircles 81 and 82 on the bottom surface S2 (see FIG. 2), a vaporization surface 87 corresponding to the upper straight line 85, and a lower side. It is formed as a columnar body having a bottom surface 88 corresponding to the curve 86 as an outer periphery. The bottom surface 88 is formed with recesses 122, 123, and 95 (see FIG. 6 described later) that communicate with the valve actuator mounting hole 118 and into which the valve actuator 150 is mounted.
- the vaporization surface 87 is a surface that plays a central role in the vaporization of the chemical solution.
- the outer peripheral surfaces 83 and 84 of the vaporizing portion 120 are configured as curved surfaces that are offset inward by the clearance C with respect to the outer peripheral surfaces 73 and 74 of the columnar recess 119.
- the vaporization surface 87 of the vaporization unit 120 is configured as a plane that is offset inward by the clearance C with respect to the ceiling surface 77 of the columnar recess 119.
- the bottom surface 88 is configured as a curved surface having a plane that is offset inward by the clearance C with respect to the bottom surface 78 of the columnar recess 119.
- the mixed gas generation space 116 is formed as a substantially cylindrical space having a thickness of the clearance C by the columnar concave portion 119 and the vaporization portion 120.
- a nitrogen gas introduction channel 114 for introducing nitrogen gas, a mixed gas discharge channel 117 for discharging the mixed gas, and a chemical solution are supplied.
- the chemical solution introduction flow path 91 is connected as described below.
- the nitrogen gas introduction channel 114 is formed in the chemical solution introduction member 125.
- a lid member 112 is connected to the chemical solution introduction member 125, and the nitrogen gas flow channel 115 communicates with the nitrogen gas introduction flow channel 114. 2 and 3, the nitrogen gas flow path 115 is formed in the lid member 112, and communicates with the mixed gas generation space 116 at the nitrogen gas supply port 115a.
- the nitrogen gas supply port 115 a is formed on the outer surface of the lid member 112 facing the mixed gas generation space 116 and in the center of the region sandwiched between the vaporization surface 87 of the vaporization unit 120 and the ceiling surface 77 of the columnar recess 119. Has been.
- the nitrogen gas supply ports 115a are also called gas introduction ports, and are not necessarily single, and a plurality of the outer surfaces of the lid member 112 are provided along an annular surface in contact with the mixed gas generation space 116. May be.
- the mixed gas discharge channel 117 is formed in the concave member 111 of the vaporizer main body 110, and communicates with the mixed gas generation space 116 at a mixed gas discharge port 117a disposed at the centroid position of the bottom surface S1.
- the mixed gas discharge port 117 a is the most downstream position of the mixed gas generation space 116.
- the mixed gas discharge port 117a is also called a gas discharge port.
- the vaporizer body 110 includes the nitrogen gas introduction channel 114, the nitrogen gas channel 115 and the nitrogen gas supply port 115 a for introducing nitrogen gas into the mixed gas generation space 116, and the mixed gas generation space 116.
- a mixed gas discharge port 117a and a mixed gas discharge channel 117 for discharging a mixed gas of nitrogen gas and vaporized chemical liquid are formed.
- the chemical flow path for introducing the chemical into the mixed gas generation space 116 is configured as follows.
- 3 and 5 show a state where the diaphragm valve body 151 of the valve actuator 150 closes the chemical liquid flow path.
- the chemical liquid flow path is configured by each flow path formed in the chemical liquid introducing member 125, the lid member 112, and the vaporization unit main body 121 of the vaporization unit 120 and the valve actuator 150.
- a chemical solution introduction channel 91 (see FIG. 3) is formed in the chemical solution introduction member 125.
- the lid member 112 is formed with a chemical solution introduction channel 92 that communicates with the chemical solution introduction channel 91.
- the vaporizer main body 121 is formed with a chemical solution supply channel 93 that is connected to the chemical solution introduction channel 92 by being fastened to the lid member 112.
- the chemical liquid supply channel 93 is connected to the valve chamber 96 via a chemical liquid inflow port 94.
- a valve seat 97 is formed in the valve chamber 96.
- FIG. 6 is an enlarged exploded cross-sectional view showing the internal configuration of the vaporizing unit main body 121 and the valve actuator 150.
- the valve chamber 96 is configured by assembling the diaphragm valve body 151 of the valve actuator 150 with respect to the recess 95. That is, the vaporization unit 120 is integrally formed with a shutoff valve having the valve chamber 96 by mounting the valve actuator 150.
- the shut-off valve is also called a control valve.
- the vaporizing unit main body 121 functions in a state where the vaporizing surface 87 is installed in a posture in which the vaporizing surface 87 is a horizontal plane facing vertically upward.
- a chemical solution discharge port 99 is connected to the valve chamber 96 via a chemical solution discharge channel 98.
- the chemical solution discharge port 99 communicates with the mixed gas generation space 116.
- the position of the chemical solution discharge port 99 is arranged on the vaporization surface 87 of the vaporization unit 120 at a position where the formation position of the nitrogen gas supply port 115a is shifted in a predetermined axial direction.
- the predetermined axial direction means an axial direction of the mixed gas generation space 116 formed as a cylindrical columnar space and a direction in which nitrogen gas flows.
- the vaporization surface 87 is also called a chemical solution supply surface.
- the chemical solution discharge channel 98 can be closed by the valve valve 97 near the chemical solution discharge port 99 by the diaphragm valve body 151, the chemical solution discharge channel 98 is shortened. Thereby, the chemical
- the valve chamber 96 since the valve chamber 96 communicates with the chemical liquid discharge flow path 98 at a position vertically above, the valve chamber 96 has a shape in which bubbles remaining before introducing the chemical liquid are difficult to stay. Since such leakage and ejection of bubbles cause an error in the supply amount of the chemical solution, this embodiment effectively suppresses such an error and significantly improves the accuracy of the supply amount of the chemical solution. Has the advantage of being able to
- the chemical solution discharge channel 98 since the chemical solution discharge channel 98 is sandwiched between the two heaters 131 and 132, it can be maintained at a high temperature during heating and immediately after heating. Thereby, since the chemical solution discharge channel 98 is maintained in a high temperature state, the chemical solution inside the chemical solution discharge channel 98 can be immediately vaporized after the supply of the chemical solution is stopped. As a result, the variation in the amount of the chemical solution vaporized due to the vaporization delay is suppressed, and the supply amount of the chemical solution can be increased.
- the valve actuator 150 is configured as follows as shown in FIG.
- the valve actuator 150 includes a diaphragm valve body 151, a piston rod 152, a spring 157, a shut-off valve body 155, and a back cover 156.
- a piston rod 152 is connected to the diaphragm valve body 151.
- a sliding portion 154 and a piston 153 are formed on the piston rod 152.
- the sliding portion 154 is a member that slides inside a guide portion 159 that is a cylindrical recess formed in the shut-off valve body 155.
- the piston 153 is a member that slides inside a cylinder portion 158 formed in communication with the guide portion 159 inside the shut-off valve body 155 and partitions the pressure control chamber 153a (see FIGS. 3 and 5). .
- Working air is supplied from the working air port 58 to the pressure control chamber 153 a via the working air flow path 59.
- the working air port 58 is connected to the electropneumatic regulator 41 as shown in FIG.
- the piston rod 152 is urged by a spiral coil-shaped spring 157 in a direction to close the chemical solution discharge channel 98 by the diaphragm valve body 151, and is operated in a direction to open the chemical solution discharge channel 98 by pressurization of the pressure control chamber 153a. can do.
- the spring 157 is fixed by a back cover 156.
- the back cover 156 is fixed by an elastic ring 156R fitted in a groove 158g formed inside the shut-off valve body 155.
- this embodiment has a double tube structure including the vaporizer main body 110 that functions as an outer tube portion that conveys a medium gas, and the vaporizer main body 121 that functions as an inner tube portion that conveys a chemical solution. Therefore, mounting with high volumetric efficiency is possible.
- the inner pipe portion is mounted with a shutoff valve that is integrally formed by using a valve actuator to further increase the volumetric efficiency. Since the valve actuator is mounted in a direction perpendicular to the axis of the double pipe structure, the valve actuator can be mounted without increasing the total length in the axis direction of the double pipe structure.
- This configuration also has the advantage that the mixed gas flow path can be purged (scavenged) simply by stopping the supply of the chemical solution. That is, the nitrogen gas supply port 115a stops all the flow from the mixed gas generation space 116 to the hydrophobization processing chamber 30 only by stopping the supply of the chemical solution and continuing the supply of the nitrogen gas from the most upstream position of the mixed gas. Can be purged.
- the vaporization is stopped by switching the mixed gas piping and the nitrogen gas piping to each other. Therefore, when switching off, the switching valve is switched from the vaporization position such as the bubbling position.
- the mixed gas stayed in the pipes up to (not shown). Since this pipe used a long pipe that supplies a long distance from the vaporization position to the chamber, if the switching position is close to the chamber, the pipe stays at a long distance from the vaporization position to the switching position. If the position is near the vaporization position, there is a trade-off problem that the time lag until the mixed gas reaches the chamber when vaporization is resumed increases.
- FIG. 7 to 10 show the configuration of the vaporization unit 120.
- FIG. FIG. 7 is a bottom view showing the appearance of the vaporizing unit 120.
- FIG. 8 is a front view showing the appearance of the vaporization unit 120.
- FIG. 9 is a component diagram illustrating the vaporization unit main body 121, the cylindrical mesh 60, and the tension generating member 141 constituting the vaporization unit 120.
- FIG. 10 is an external perspective view showing a state where the vaporizing unit 120 is being assembled.
- the vaporization unit 120 includes a vaporization unit main body 121, a valve actuator 150, a cylindrical mesh 60, and two tension generating members 141 and 142 as shown in FIG.
- the vaporizing unit main body 121 is an aluminum part having wettability with respect to a chemical solution, for example, and has a columnar outer shape except for the recesses 122, 123, and 95 (see FIG. 6) in which the valve actuator 150 is mounted as described above. It has a shape.
- the columnar outer shape of the vaporizing unit main body 121 includes a vaporizing surface 87 in which the chemical solution discharge port 99 is formed at the centroid position and a pair of outer peripheral surfaces 83 and 84 sandwiching the vaporizing surface 87 as a part of the outer peripheral surface. .
- This outer peripheral surface is covered with a cylindrical mesh 60.
- the cylindrical mesh 60 is a member that is wound around a connecting portion 60s by winding a mesh body 69 formed into a planar shape by regularly knitting a wire rod made of stainless steel into a mesh shape, for example.
- the vaporization unit 120 is assembled as follows prior to mounting on the lid member 112 as shown in FIG. (1)
- the cylindrical mesh 60 is attached to the vaporizing unit main body 121.
- the position of the cylindrical mesh 60 is adjusted so that all of the concave portions 122 of the vaporizing unit main body 121 enter the square cutout portion (hole portion or missing portion) 60h formed in the cylindrical mesh 60.
- Two tension generating members 141 and 142 are attached to the vaporizing unit main body 121 (see FIG. 8).
- Each of the tension generating members 141 and 142 includes four screws 145 that pass through the holes 146 of the tension generating members 141 and 142 and are screwed into the eight screw holes 147 of the vaporizing unit main body 121. It is attached to. The tension can be adjusted by the screwing amount of the four screws 145.
- the tension generating members 141 and 142 are members that generate a circumferential tension on the cylindrical mesh 60.
- the circumferential tension is generated along outer peripheral surfaces 83 and 84 (see FIG. 9) which are a pair of continuous curved surfaces. Since the outer peripheral surfaces 83 and 84 are continuous with the vaporization surface 87 at a position sandwiching the vaporization surface 87 where the chemical solution discharge port 99 is formed, the vaporization surface 87 and the cylindrical mesh 60 are brought into contact with each other. become.
- the cylindrical mesh 60 can be wound without a gap.
- the contact between the vaporized surface 87 and the cylindrical mesh 60 is easily realized, and the loosening of the mesh body due to changes in the thermal environment and aging (for example, plastic deformation and creep of the mesh body) is suppressed. Can do. As a result, mutual contact between the mesh body and the vaporized surface is reliably maintained.
- a pair of metal reinforcing members 60 ⁇ / b> R ⁇ b> 1 and 60 ⁇ / b> R ⁇ b> 2 are attached to the cylindrical mesh 60.
- the reinforcing members 60R1 and 60R2 are members for uniformly transmitting the tension generated by the tension generating members 141 and 142 to the cylindrical mesh 60 in the axial direction.
- the reinforcing member 60R1 is fixed to the cylindrical mesh 60 by a pair of members sandwiching the cylindrical mesh 60 from the inside and the outside.
- a pair of members may be bonded to each other with the cylindrical mesh 60 interposed therebetween, or may be welded to each other.
- the tension generating members 141 and 142 can generate the tension uniformly on the vaporization surface 87 even if the cylindrical mesh 60 has elasticity.
- FIG. 11 is an enlarged plan view showing the configuration of the net 69 that forms the cylindrical mesh 60.
- the cylindrical mesh 60 is formed using a net 69 formed in a planar shape (a flat plate shape) as a material.
- the net-like body 69 is formed by knitting (weaving) the vertical wire rods 61, 63, 65, 67 and the horizontal wire rods 62, 64, 66, 68, which have wettability to the chemical solution, to each other. Yes.
- the vertical wire members 61, 63, 65, and 67 and the horizontal wire members 62, 64, 66, and 68 are all formed of a material having wettability with respect to a chemical solution.
- the mesh body 69 (mesh), one having a wire diameter (diameter of the vertical wire 61, horizontal wire 62, etc.) of 0.1 mm and a distance between wires of 0.15 mm (so-called 100 mesh) is used.
- the net 69 is placed in contact with the vaporization surface 87.
- the wire diameter and the distance between the wires are preferably set to appropriate values according to the chemical solution.
- the mesh body 69 is formed with a mesh space (for example, mesh spaces T1, T3) regularly arranged in the in-plane direction.
- the mesh space T1 is a square (planar) fine (0.15 mm ⁇ 0.15 mm) space surrounded by two vertical wire members 63 and 65 and two horizontal wire members 64 and 66.
- the mesh space T3 is a fine planar space surrounded by two vertical wire members 63 and 65 and two horizontal wire members 62 and 64. Since the mesh space T1 is a fine space, the chemical solution can be sucked by the intermolecular force between the chemical solution and the wires 63, 64, 65, 66 to form a film of the chemical solution (capillary phenomenon).
- the structure for circulating the chemical solution by capillary action is not formed between the mesh spaces adjacent to each other (for example, the mesh space T1 and the mesh space T3), the function of spreading the chemical solution and forming a thin film is sufficient. It has been found by the present inventors not. This is because the chemical solution cannot be sufficiently propagated in the plane of the net 69. That is, even if the chemical solution is supplied to a part of the net 69, the propagation speed of the chemical solution is slow, and therefore, a portion where the supply of the chemical solution is not in time during evaporation occurs. As a result, it was found that the network 69 alone cannot stabilize the area of the film of the chemical solution (for example, the thin film does not spread widely, or the thin film is caused by transpiration).
- FIG. 12 is a cross-sectional view showing the configuration of the cylindrical mesh 60 and the vaporized surface 87 in contact with each other.
- the contact between the cylindrical mesh 60 and the vaporization surface 87 is a chemical solution supply space (for example, chemical solution supply spaces T2, T4) regularly arranged in the in-plane direction of the cylindrical mesh 60 (the in-plane direction of the vaporization surface 87). Is forming.
- the chemical solution supply space T2 is a space surrounded by the vaporization surface 87, the vertical wire 65, and the horizontal wire 64.
- the chemical solution supply space T2 is formed as a closed space by the contact between the vaporization surface 87 and the vertical wire 65, the contact between the vertical wire 65 and the horizontal wire 64, and the contact C1 between the horizontal wire 64 and the vaporization surface 87. Yes.
- the chemical solution supply space T ⁇ b> 4 is a space surrounded by the vaporization surface 87, the vertical wire 61, and the horizontal wire 64.
- the chemical solution supply space T4 is formed as a space closed by the contact between the vaporization surface 87 and the vertical wire 61, the contact between the vertical wire 61 and the horizontal wire 64, and the contact C1 between the horizontal wire 64 and the vaporization surface 87. Yes.
- the contact between the vaporized surface 87 and the vertical wire 61 and the contact force between the vaporized surface 87 and the vertical wire 65 are generated by the tension applied to the horizontal wire 64. This is because the tension applied to the horizontal wire 64 tries to straighten by moving (pressing) the vertical wire 65 toward the vaporization surface 87. It can be seen that the contact between the vaporized surface 87 and each wire (both horizontal wire and vertical wire) works by the same mechanism at any position.
- the chemical solution supply spaces T2 and T4 are formed by being surrounded by the wire rods 61 and 65 and the vaporization surface 87 and are regularly arranged in the in-plane direction of the mesh body 69.
- a uniform thin film state of the chemical solution can be realized by supplying the chemical solution uniformly in the in-plane direction of the mesh body.
- a uniform thin film state of the chemical solution is realized by supplying the chemical solution uniformly in the in-plane direction (two-dimensional direction) of the mesh body along each wire and the vaporization surface 87 mainly for the following two reasons.
- the first reason is that the horizontal wires 62, 64, 66, and 68 are separated from the vaporization surface 87 at the positions where the vertical wires 61, 63, 65, and 67 are in contact with the vaporization surface 87 (intersection positions of the wires).
- the vertical wires 61, 63, 65, and 67 are separated from the vaporized surface 87 at positions where the horizontal wires 62, 64, 66, and 68 abut against the vaporized surface 87, and the chemical solution flows along the longitudinal direction of each wire. This is because space is secured.
- each wire is realized by a capillary phenomenon that occurs along the gap between each wire and the vaporized surface 87 because both the wire and the vaporized surface 87 have wettability. Yes.
- medical solution can flow smoothly along the longitudinal direction of each of a vertical wire and a horizontal wire.
- the second reason is that a chemical solution supply space is formed at each crossing position between the vertical wire and the horizontal wire, so that the flow of the chemical smoothly branches into a flow along the vertical wire and a flow along the horizontal wire. be able to.
- medical solution can be uniformly supplied to the two-dimensional direction of the surface direction of the mesh body 69.
- FIG. As a result, the chemical solution can be smoothly supplied according to the decrease of the chemical solution held in the chemical solution holding space by the evaporation of the chemical solution, so that a uniform thin film state of the chemical solution is maintained.
- the vaporization unit 120 of this embodiment is based on the synergistic action of the chemical solution supply space (chemical solution supply function) and the mesh space (thin film maintenance function) regularly arranged in the in-plane direction of the mesh body 69.
- the chemical solution supply space chemical solution supply function
- the mesh space thin film maintenance function
- capillarity can be applied to maintain the thin film state of the chemical solution against the transpiration of the chemical solution.
- This configuration is realized by the regularity of the outer shape of the mesh body 69 formed into a planar shape by knitting a wire rod in a mesh shape.
- the mesh space is regularly arranged in the in-plane direction of the mesh body 69, and the chemical solution supply path is formed in the chemical solution supply space regularly formed with respect to the regularly arranged mesh space. Therefore, the formation of a uniform thin film by the capillary inflow and the uniform supply of the chemical solution are realized. Conversely, for example, even if a mesh-like hole is formed in a film-like member, the chemical solution supply space is not formed, so that the effect of the present invention cannot be achieved.
- Such a structure formed by the mesh 69 and the vaporized surface 87 is contrary to the technical common sense of those skilled in the art at the time of filing. It is common technical knowledge of those skilled in the art at the time of filing that the mesh body 69 as a so-called mesh is used as a filter by utilizing the size of the mesh in the plane of the mesh. However, the inventor pays attention to the structure (shape, etc.) in the out-of-plane direction of the filter, creates a new structure by abutting the structure with the vaporization surface 87, and is a thin film of chemical solution required for vaporization of the chemical solution. And stable and large-scale supply of chemicals to thin films.
- FIG. 13 is a cross-sectional view showing the configuration of the cylindrical mesh 60 and the vaporized surface 87 in contact with each other.
- spaces T2a and T4a formed in a state where the wire rod regularly approaches the vaporization surface 87 and a gap G is generated and a part thereof is cut off are also included in the chemical solution supply space. This is because a space surrounded by a part cut off also causes capillary action.
- the chemical solution supply space has a broad meaning, and does not necessarily need to form a closed space completely surrounded by the wire and the vaporization surface 87, and may be partially cut off.
- a uniform thinning state of the chemical solution can be realized by the plurality of mesh spaces, and the chemical solution can be uniformly supplied in the two-dimensional direction by the chemical solution supply space. Thereby, a smooth and large amount of vaporization can be realized with a small vaporizer.
- the chemical solution is supplied and vaporized by the planar structure of the vaporization surface and the net-like body, it is different from the method of increasing the surface area of the chemical solution by, for example, a three-dimensional structure (for example, foam). It does not cause the problem of deterioration of the chemical solution staying inside the three-dimensional structure.
- FIG. 14 is a diagram illustrating a configuration of the liquid vaporizer 200.
- (A) is a top view of the liquid vaporizer 200
- (b) is a cross-sectional view taken along the line BB of (a).
- the vaporizer main body 110 is provided with the nitrogen gas supply port 115a (gas introduction port) and the mixed gas discharge port 117a (gas discharge port), but the liquid of the second embodiment
- the vaporizer main body 221 is provided with a nitrogen gas supply port 215a (gas introduction port) and a mixed gas discharge port 217a (gas discharge port).
- a first block 271 and a second block 273 are attached to the lid member 212.
- a nitrogen gas introduction channel 272 is provided inside the first block 271, and a mixed gas discharge channel 274 is provided inside the second block 273. Then, nitrogen gas is introduced from the nitrogen gas introduction flow path 272 and the mixed gas is discharged from the mixed gas discharge flow path 274.
- a nitrogen gas passage 214 is provided inside the lid member 212, and the nitrogen gas introduction passage 272 is connected to the nitrogen gas passage 214.
- the nitrogen gas flow path 214 bends and extends in the axial direction from the direction perpendicular to the axial direction of the vaporization section 220 and opens at the end surface of the lid member 212 on the concave member 111 side.
- a mixed gas channel 213 is provided inside the lid member 212, and the mixed gas discharge channel 274 is connected to the mixed gas channel 213.
- the mixed gas flow path 213 is bent and extended in the axial direction from the direction perpendicular to the axial direction of the vaporizing section 220, and is opened at the end surface of the lid member 212 on the concave member 111 side.
- a nitrogen gas flow path 215 (medium gas flow path) for circulating nitrogen gas is provided inside the vaporizing unit main body 221, and the nitrogen gas flow path 214 is connected to the nitrogen gas flow path 215.
- the nitrogen gas flow path 215 extends in the axial direction of the vaporizing unit main body 221 and is provided along a heater 132 (heating unit) that heats the vaporizing surface 87 from the inside of the vaporizing unit main body 221.
- the nitrogen gas flow path 215 is provided in parallel to the heater 132 on the side of the heater 132.
- a mixed gas flow path 217 (mixed gas flow path) through which a mixed gas flows is provided inside the vaporizing unit main body 221, and the mixed gas flow path 213 is connected to the mixed gas flow path 217.
- the mixed gas flow path 217 extends in the axial direction of the vaporization unit main body 221 and is provided along a heater 131 (heating unit) that heats the vaporization surface 87 from the inside of the vaporization unit main body 221.
- the mixed gas flow path 217 is provided in parallel to the heater 131 on the side of the heater 131.
- the nitrogen gas flow path 215 and the mixed gas flow path 217 extend to the vicinity of the center of the vaporization unit main body 221 in the axial direction of the vaporization unit main body 221, respectively, and the nitrogen gas supply port 115a and the mixed gas discharge port extend to the vaporization surface 87 side. 117a opens to the vaporization surface 87, respectively.
- the chemical solution discharge port 99 is disposed between the nitrogen gas supply port 115a and the mixed gas discharge port 117a.
- the cross-sectional shapes of the nitrogen gas supply port 115a and the mixed gas discharge port 117a are oblong with the axial direction of the vaporizing unit main body 221 as the longitudinal direction.
- the nitrogen gas flowing from the nitrogen gas supply port 115a to the mixed gas discharge port 117a in the direction perpendicular to the axial direction of the vaporizing unit main body 221 is easily diffused in the axial direction of the vaporizing unit main body 221. Further, it becomes easy to collect the nitrogen gas and the mixed gas diffused in the axial direction of the vaporizing unit main body 221 to the mixed gas discharge port 117a.
- the temperature of the vaporization unit main body 221 increases.
- the nitrogen gas is heated while passing through the nitrogen gas flow path 215 and introduced into the mixed gas generation space 116 from the nitrogen gas supply port 115a. Further, the mixed gas discharged from the mixed gas discharge port 117a is heated while flowing through the mixed gas flow path 217.
- the nitrogen gas channel 215 and the mixed gas channel 217 are provided along the heaters 132 and 131, respectively, the temperature of the nitrogen gas channel 215 and the mixed gas channel 217 can be increased efficiently. it can.
- the outer peripheral surfaces 83 and 84 (only the outer peripheral surface 84 is shown in FIG. 15) of the outer peripheral surface of the vaporizing unit main body 221 are curved, and the axis of the vaporizing unit main body 221 is shown. Recesses 243 are formed so as to extend linearly in the direction.
- the mesh 260 is wound around the vaporizing unit main body 221, and its end is sandwiched between the pressing member 244 and the vaporizing unit main body 221.
- the pressing member 244 is fixed to the vaporizing unit main body 221 by a fixing member 245.
- the end portion of the mesh 260 is guided outward from between the pressing member 244 and the fixing member 245.
- the configuration of the mesh 260 can be simplified.
- the mesh 260 is wound around the vaporizing unit main body 221, the mesh 260 is pulled by the pressing member 244 so as not to be loosened. Then, the pressing member 244 is fixed to the vaporizing unit main body 221 by the fixing member 245. As a result, the mesh 260 is in a state of being substantially in close contact with the vaporizing unit main body 221.
- FIG. 15B shows a state where only the mesh 260 is taken out.
- the insertion member 242 is inserted between the concave member 111 and the mesh 260 from the axial direction of the vaporizing unit main body 221 so as to engage with the concave portion 243.
- the insertion member 242 is formed in a round bar shape, and the radius of the cross section thereof is substantially equal to the radius of curvature of the recess 243.
- the distal end portion of the insertion member 242 is slightly thinner than other portions, and the mesh 260 is inserted from the distal end portion while pressing the mesh 260 against the concave portion 243.
- Nitrogen gas is heated while passing through the nitrogen gas flow path 215 and is introduced into the mixed gas generation space 116 from the nitrogen gas supply port 115a, so that vaporization of the chemical liquid can be promoted.
- the mixed gas discharged from the mixed gas discharge port 117a is heated while flowing through the mixed gas flow path 217, condensation of the mixed gas can be suppressed.
- the nitrogen gas channel 215 and the mixed gas channel 217 are provided along the heaters 132 and 131, respectively, heating of the nitrogen gas when passing through the nitrogen gas channel 215, and the mixed gas channel Heating of the mixed gas when passing through 217 can be further promoted.
- the cross sections of the nitrogen gas supply port 115a and the mixed gas discharge port 117a are oblong with the axial direction of the vaporizing unit main body 221 as the longitudinal direction. This facilitates the diffusion of the nitrogen gas in the axial direction of the vaporizing unit main body 221 and facilitates the collection of the nitrogen gas and the mixed gas to the mixed gas discharge port 117a.
- the cross-sectional shape of the wire is a perfect circle, but it is not necessarily a perfect circle, and may be an ellipse or a polygon (such as a quadrangle or a hexagon).
- a stainless mesh body (mesh) 69 having a roughness of 100 mesh is used, but other roughness mesh bodies may be used, and the mesh body is not necessarily made of stainless steel. There is no need, and a mesh made of other metal may be used.
- the mesh body does not necessarily need to be a metal, and a resin mesh made of a fluororesin or the like may be used.
- the material and roughness of the net-like body can be appropriately set according to the properties of the chemical solution such as the wettability and viscosity of the chemical solution to be vaporized.
- the shape of the mesh space is a square, but may be a hexagon or a rhombus, for example.
- the knitting method of the net-like body is a plain weave (hiraori) in which the wires are crossed one by one, but may be another weaving method (knitting method) such as twill weave.
- the present invention can utilize a net-like body formed into a planar shape by regularly knitting a wire rod into a net-like shape.
- the pitch of the vertical wire and the horizontal wire is the same pitch in the above-described embodiment, for example, the pitch of the horizontal wire may be made smaller than the pitch of the vertical wire. In this way, the speed of capillary inflow can be changed (adjusted) depending on the direction.
- the contact between the mesh body and the vaporized surface is realized by applying a tension to the mesh body.
- a tension for example, magnetic force (use of magnetic mesh), adhesive force, pressure by a structural member with a coarse mesh It may be generated by a method such as application.
- the chemical solution discharge port is formed on the vaporization surface, but may be supplied from the columnar recess 119 side (opposite the vaporization surface), for example.
- the distance in the out-of-plane direction of the mesh body is shorter than the diameter of the droplet of the chemical solution formed by the surface tension at the chemical solution discharge port with respect to the mesh body. It is preferable to arrange
- the present liquid vaporization system 10 is used in a semiconductor production line, but it can also be used in other production lines. Moreover, in the said embodiment, although this liquid vaporization system 10 was used in order to vaporize the hexamethyldisilazane liquid (HMDS liquid) as a liquid material, other liquid materials, such as tetramethylcyclotetrasiloxane (TMCTS), are vaporized. It may be used to
- SYMBOLS 10 Liquid vaporization system, 11 ... Pump, 13 ... Suction side valve, 15 ... Suction flow path, 16 ... Discharge flow path, 17 ... Mixed gas supply flow path, 18 ... Nitrogen gas supply path, 20 ... Liquid vaporization apparatus, 30 DESCRIPTION OF SYMBOLS ... Spin coater, 40 ... Controller, 41 ... Electropneumatic regulator, 42 ... Working air supply source, 60 ... Cylindrical mesh, 69 ... Reticulated body, 87 ... Vaporization surface, 99 ... Chemical liquid discharge port, 100 ... Liquid vaporizer, 110 ... Vapor body, 111 ... concave member, 112 ...
- lid member 116 ... mixed gas generation space, 118 ... valve actuator mounting hole, 119 ... columnar recess, 120 ... vaporizer, 121 ... vaporizer main body, 131, 132 ... heater, 133, 134 ... temperature sensors, 141, 142 ... tension generating members, 150 ... valve actuators.
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Abstract
Description
前記媒体ガスを導入するガス導入口と、前記ガス導入口から導入された媒体ガスに気化された前記薬液を混合して混合ガスを生成するための混合ガス生成空間と、前記混合ガスを排出するガス排出口とを有する気化器本体と、
前記混合ガス生成空間の内部に配置され、前記供給された薬液を気化させる気化部と、を備え、
前記気化部は、気化面が形成されている気化部本体と、線材を網目状に規則的に編むことによって面状に形成されている網状体とを有し、
前記網状体は、前記線材によって囲まれている空間であって、前記網状体の面内方向に規則的に配列されている複数の網目空間を形成し、
前記気化部は、前記網状体と前記気化面とが相互に当接することによって前記線材と前記気化面とによって囲まれている空間であって、前記網状体の面内方向に規則的に配列されている複数の薬液供給空間を形成している液体気化器。
前記網状体は、前記柱状体の外周方向に沿って巻きつけられている手段1記載の液体気化器。
前記気化部は、前記連続曲面に沿って前記網状体に対して張力を発生させることによって、前記網状体と前記気化面とを当接させている手段1乃至3のいずれか1項に記載の液体気化器。
前記気化部は、前記一対の連続曲面に沿って前記網状体に対して張力を発生させることによって、前記一対の連続曲面に挟まれている平面と前記網状体とを当接させている手段4記載の液体気化器。
前記薬液吐出口は、前記網状体に当接している気化面に形成されている手段1乃至5のいずれか一つに記載の液体気化器。
前記薬液吐出口は、前記網状体の面外方向において、前記網状体から所定の距離だけ離れた位置に配置され、
前記所定の距離は、表面張力によって前記薬液吐出口に形成される薬液の液滴の直径よりも短い距離である手段1乃至5のいずれか一つに記載の液体気化器。
前記薬液吐出口への薬液の供給を制御する制御バルブと、
前記薬液吐出口と前記制御バルブとを接続する薬液吐出流路と、
前記薬液吐出流路を挟む位置に配置された複数の加熱部と、
を有している手段6記載の液体気化器。
前記気化部本体は、前記混合ガス生成空間の内部に配置され、前記第1の柱状形状の軸線と平行な軸線の第2の柱状形状の外形を有する管部であって、前記第2の柱状形状の軸線方向の薬液供給流路が形成されている内側管部を有し、
前記第1の柱状形状の軸線と垂直な方向に前記外側管部を貫通して前記内側管部に装着されている弁アクチュエータを備え、
前記弁アクチュエータは、前記薬液供給流路と前記薬液吐出流路の連通状態を制御する弁体を有する手段9記載の液体気化器。
媒体ガスに、気化された前記薬液を混合して混合ガスを生成するための混合ガス生成空間を有する気化器本体と、
前記混合ガス生成空間の内部に配置され、前記供給された薬液を気化させる気化部と、を備え、
前記気化部は、気化面が形成されている気化部本体と、線材を網目状に規則的に編むことによって面状に形成されている網状体とを有し、
前記気化部本体は、前記気化部本体の内部から前記気化面を加熱する加熱部と、前記媒体ガスを流通させる媒体ガス流路と、前記媒体ガス流路を流通する前記媒体ガスを前記混合ガス生成空間へ導入するガス導入口と、前記混合ガス生成空間から前記混合ガスを排出するガス排出口と、前記排出口から排出される前記混合ガスを流通させる混合ガス流路とを有し、
前記網状体は、前記線材によって囲まれている空間であって、前記網状体の面内方向に規則的に配列されている複数の網目空間を形成し、
前記気化部は、前記網状体と前記気化面とが相互に当接することによって前記線材と前記気化面とによって囲まれている空間であって、前記網状体の面内方向に規則的に配列されている複数の薬液供給空間を形成している液体気化器。
前記薬液吐出口は、前記ガス導入口と前記ガス排出口との間に配置されている手段13又は14に記載の液体気化器。
図1は、実施形態の液体気化システム10と疎水化処理チャンバ30の構成を示すダイアグラムである。液体気化システム10は、薬液を気化して窒素ガスとの混合ガスを生成して疎水化処理チャンバ30に供給するシステムである。疎水化処理チャンバ30は、フォトリソグラフィープロセスにおいて、レジスト液の塗布の前処理として供給された混合ガスを半導体ウェハW(以下、略してウェハという)の表面に塗布(散布)する装置である。
図2は、液体気化器100の概略構成を示す分解斜視図である。図3は、液体気化器100の内部構成を示す縦断面図である。図4は、液体気化器100の外観を示す下面図である。液体気化器100は、気化器本体110と、気化部120と、薬液導入部材125と、2個のヒータ131,132と、弁アクチュエータ150と、温度センサ133,134とを備えている。気化器本体110は、柱状凹部119と柱状凹部119に連通する弁アクチュエータ装着孔118とが形成されている凹状部材111と、柱状凹部119を気化器本体110の外部から封止する蓋部材112とを備えている。弁アクチュエータ装着孔118は、柱状凹部119の柱状形状の軸方向に垂直に連通する弁アクチュエータ150を装着するための円柱状の貫通孔として形成されている。
(2)気化面と網状体の平面的な構造によって薬液の供給と気化とが実現されているので、たとえば3次元的な構造体(たとえば発泡体)によって薬液の表面積を大きくする方法と相違し、3次元的な構造体の内部に滞留する薬液の劣化の問題を生じさせない。
(3)気化面と網状体の平面的な構造を有するので、薄膜の形成において無駄な部分が存在せず容積効率が高い。これにより、小型化が実現可能となるので、ウェハを格納するチャンバの近傍に気化器を配置することができる。
(4)薬液が媒体ガス(窒素ガス)に晒され続ける状態(たとえばバブリング)に起因する薬液の劣化を防止することができる。本実施形態では、気化の直前まで媒体ガスと接触しないからである。
(5)気化面と網状体とによって簡易に構成することができる。
図14は、液体気化器200の構成を示す図である。(a)は、液体気化器200の上面図であり、(b)は、(a)のB-B線断面図である。第1実施形態の液体気化器100では、気化器本体110に窒素ガス供給口115a(ガス導入口)及び混合ガス排出口117a(ガス排出口)が設けられていたが、第2実施形態の液体気化器200では、気化部本体221に窒素ガス供給口215a(ガス導入口)及び混合ガス排出口217a(ガス排出口)が設けられている。そして、窒素ガス供給口115aから混合ガス生成空間116へ窒素ガスが導入され、混合ガス排出口217aから混合ガスが排出される。なお、第1実施形態と同一の部材については、同一の符号を付すことにより説明を省略する。
(2)混合ガス排出口117aから排出される混合ガスは、混合ガス流路217を流通する間加熱されるため、混合ガスの結露を抑制することができる。
(3)窒素ガス流路215及び混合ガス流路217は、それぞれヒータ132,131に沿って設けられているため、窒素ガス流路215を通過する際の窒素ガスの加熱と、混合ガス流路217を通過する際の混合ガスの加熱とを、更に促進することができる。
(4)窒素ガス供給口115a及び混合ガス排出口117aの断面は、気化部本体221の軸線方向を長手方向とする長円形となっている。これにより、窒素ガスを気化部本体221の軸線方向へ拡散させ易くなるとともに、窒素ガス及び混合ガスを混合ガス排出口117aへ収集し易くなる。
(5)簡易な構成により気化部本体221の外周面に沿ってメッシュ260に張力を発生させることができるととともに、凹部243により挿入部材242のずれを抑制することができる。
本発明は上記実施形態に限らず、例えば次のように実施されてもよい。
Claims (16)
- 薬液供給口から供給された薬液を気化させて媒体ガスに混合させる液体気化器であって、
前記媒体ガスを導入するガス導入口と、前記ガス導入口から導入された媒体ガスに気化された前記薬液を混合して混合ガスを生成するための混合ガス生成空間と、前記混合ガスを排出するガス排出口とを有する気化器本体と、
前記混合ガス生成空間の内部に配置され、前記供給された薬液を気化させる気化部と、を備え、
前記気化部は、気化面が形成されている気化部本体と、線材を網目状に規則的に編むことによって面状に形成されている網状体とを有し、
前記網状体は、前記線材によって囲まれている空間であって、前記網状体の面内方向に規則的に配列されている複数の網目空間を形成し、
前記気化部は、前記網状体と前記気化面とが相互に当接することによって前記線材と前記気化面とによって囲まれている空間であって、前記網状体の面内方向に規則的に配列されている複数の薬液供給空間を形成している液体気化器。 - 前記気化面は、柱状体の外周面の一部として形成され、
前記網状体は、前記柱状体の外周方向に沿って巻きつけられている請求項1記載の液体気化器。 - 前記気化部は、前記柱状体の外周方向に沿って前記網状体に張力を発生させる張力発生部を有している請求項2記載の液体気化器。
- 前記気化面は、前記網状体の側の面外方向に突出する凸状の面が連なって形成されている連続曲面を含み、
前記気化部は、前記連続曲面に沿って前記網状体に対して張力を発生させることによって、前記網状体と前記気化面とを当接させている請求項1乃至3のいずれか1項に記載の液体気化器。 - 前記気化面は、前記薬液が供給される平面である薬液供給面と、前記薬液供給面を挟む位置において前記平面と連続している一対の前記連続曲面とを含み、
前記気化部は、前記一対の連続曲面に沿って前記網状体に対して張力を発生させることによって、前記一対の連続曲面に挟まれている平面と前記網状体とを当接させている請求項4記載の液体気化器。 - 薬液を前記気化面に供給する薬液吐出口を備え、
前記薬液吐出口は、前記網状体に当接している気化面に形成されている請求項1乃至5のいずれか1項に記載の液体気化器。 - 薬液を前記気化面に供給する薬液吐出口を備え、
前記薬液吐出口は、前記網状体の面外方向において、前記網状体から所定の距離だけ離れた位置に配置され、
前記所定の距離は、表面張力によって前記薬液吐出口に形成される薬液の液滴の直径よりも短い距離である請求項1乃至5のいずれか1項に記載の液体気化器。 - 前記気化部本体は、前記気化部本体の内部に加熱部を有している請求項6又は7に記載の液体気化器。
- 前記気化部本体は、
前記薬液吐出口への薬液の供給を制御する制御バルブと、
前記薬液吐出口と前記制御バルブとを接続する薬液吐出流路と、
前記薬液吐出流路を挟む位置に配置された複数の加熱部と、
を有している請求項6記載の液体気化器。 - 前記気化器本体は、第1の柱状形状の柱状空間として前記混合ガス生成空間を形成している外側管部を有し、
前記気化部本体は、前記混合ガス生成空間の内部に配置され、前記第1の柱状形状の軸線と平行な軸線の第2の柱状形状の外形を有する管部であって、前記第2の柱状形状の軸線方向の薬液供給流路が形成されている内側管部を有し、
前記外側管部を貫通して前記内側管部に装着されている弁アクチュエータを備え、
前記弁アクチュエータは、前記薬液供給流路と前記薬液吐出流路の連通状態を制御する弁体を有する請求項9記載の液体気化器。 - 前記薬液吐出口は、前記第1の柱状形状の軸線方向において、前記ガス導入口と前記ガス排出口との間に配置されている請求項10記載の液体気化器。
- 前記ガス排出口は、前記第1の柱状形状の軸線方向において、前記第1の柱状形状の柱状空間の混合ガス生成空間の底面と前記気化部本体の底面との間の隙間に形成される空間に対して少なくとも一部が連通する位置に配置されている請求項11記載の液体気化器。
- 薬液供給口から供給された薬液を気化させて媒体ガスに混合させる液体気化器であって、
媒体ガスに、気化された前記薬液を混合して混合ガスを生成するための混合ガス生成空間を有する気化器本体と、
前記混合ガス生成空間の内部に配置され、前記供給された薬液を気化させる気化部と、を備え、
前記気化部は、気化面が形成されている気化部本体と、線材を網目状に規則的に編むことによって面状に形成されている網状体とを有し、
前記気化部本体は、前記気化部本体の内部から前記気化面を加熱する加熱部と、前記媒体ガスを流通させる媒体ガス流路と、前記媒体ガス流路を流通する前記媒体ガスを前記生成空間へ導入するガス導入口と、前記生成空間から前記混合ガスを排出するガス排出口と、前記排出口から排出される前記混合ガスを流通させる混合ガス流路とを有し、
前記網状体は、前記線材によって囲まれている空間であって、前記網状体の面内方向に規則的に配列されている複数の網目空間を形成し、
前記気化部は、前記網状体と前記気化面とが相互に当接することによって前記線材と前記気化面とによって囲まれている空間であって、前記網状体の面内方向に規則的に配列されている複数の薬液供給空間を形成している液体気化器。 - 前記媒体ガス流路及び前記混合ガス流路は、前記加熱部に沿って設けられている請求項13記載の液体気化器。
- 薬液を前記気化面に供給する薬液吐出口を備え、
前記薬液吐出口は、前記ガス導入口と前記ガス排出口との間に配置されている請求項13又は14に記載の液体気化器。 - 前記張力発生部は、前記柱状体の外周面おいて前記柱状体の軸線方向に直線状に延びるように形成された凹部と、前記凹部に係合するように前記気化器本体及び前記網状体の間に挿入された挿入部材とを有する請求項3記載の液体気化器。
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KR20140008332A (ko) | 2014-01-21 |
JPWO2012098730A1 (ja) | 2014-06-09 |
JP5810101B2 (ja) | 2015-11-11 |
KR101845580B1 (ko) | 2018-04-04 |
TWI532094B (zh) | 2016-05-01 |
TW201232656A (en) | 2012-08-01 |
US9127359B2 (en) | 2015-09-08 |
US20130298834A1 (en) | 2013-11-14 |
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