WO2022080069A1 - 圧力センサ用のカバー部品およびこれを備える圧力センサ装置 - Google Patents
圧力センサ用のカバー部品およびこれを備える圧力センサ装置 Download PDFInfo
- Publication number
- WO2022080069A1 WO2022080069A1 PCT/JP2021/033812 JP2021033812W WO2022080069A1 WO 2022080069 A1 WO2022080069 A1 WO 2022080069A1 JP 2021033812 W JP2021033812 W JP 2021033812W WO 2022080069 A1 WO2022080069 A1 WO 2022080069A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pressure sensor
- pressure
- cover component
- lid member
- cable
- Prior art date
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 description 29
- 238000011144 upstream manufacturing Methods 0.000 description 16
- 230000008016 vaporization Effects 0.000 description 15
- 238000009834 vaporization Methods 0.000 description 14
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000012530 fluid Substances 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 239000004696 Poly ether ether ketone Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
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- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
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- 238000003780 insertion Methods 0.000 description 4
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- 239000004065 semiconductor Substances 0.000 description 3
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- 230000035882 stress Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000599 Cr alloy Inorganic materials 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 239000000788 chromium alloy Substances 0.000 description 2
- OGSYQYXYGXIQFH-UHFFFAOYSA-N chromium molybdenum nickel Chemical compound [Cr].[Ni].[Mo] OGSYQYXYGXIQFH-UHFFFAOYSA-N 0.000 description 2
- 230000006355 external stress Effects 0.000 description 2
- 229910000856 hastalloy Inorganic materials 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000011344 liquid material Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- ZGDWHDKHJKZZIQ-UHFFFAOYSA-N cobalt nickel Chemical compound [Co].[Ni].[Ni].[Ni] ZGDWHDKHJKZZIQ-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
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- 229910021389 graphene Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
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- 238000005498 polishing Methods 0.000 description 1
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- 230000004043 responsiveness Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- LXEXBJXDGVGRAR-UHFFFAOYSA-N trichloro(trichlorosilyl)silane Chemical compound Cl[Si](Cl)(Cl)[Si](Cl)(Cl)Cl LXEXBJXDGVGRAR-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
- G01L19/0681—Protection against excessive heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/14—Housings
- G01L19/147—Details about the mounting of the sensor to support or covering means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0061—Electrical connection means
- G01L19/0084—Electrical connection means to the outside of the housing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
- G01L7/08—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the flexible-diaphragm type
Definitions
- the present invention relates to a cover component for a pressure sensor and a pressure sensor device including the cover component, and in particular, realizes heat retention and heat equalization of a high temperature compatible small pressure sensor used for pressure measurement of high temperature gas supplied to a semiconductor manufacturing device or the like.
- the present invention relates to a cover component and a pressure sensor device including the cover component.
- a mass flow controller thermal mass flow controller
- a pressure type flow rate control device is known as a mass flow controller
- the pressure type flow rate control device can control the mass flow rate of various fluids with high accuracy by a relatively simple configuration that combines a control valve and a throttle portion (for example, an orifice plate or a critical nozzle) on the downstream side thereof.
- the pressure type flow rate control device has an excellent flow rate control characteristic that stable flow rate control can be performed even if the supply pressure on the primary side fluctuates greatly (for example, Patent Document 1).
- a pressure sensor for measuring the pressure between the control valve and the throttle portion (hereinafter, may be referred to as upstream pressure) is provided.
- the output of the pressure sensor is used for feedback control of the control valve, and by controlling the upstream pressure using the control valve, the flow rate of the gas flowing to the downstream side of the throttle portion can be controlled.
- a type in which a strain gauge is attached to a diaphragm which is a pressure sensitive portion is used (for example, Patent Document 2).
- the diaphragm type pressure sensor is configured so that the diaphragm is deformed or distorted according to the pressure of the measured gas, and it is possible to measure the pressure of the gas based on the output of the attached strain gauge.
- a configuration has been known in which a liquid raw material is vaporized using a vaporization supply device provided on the upstream side of a pressure type flow rate control device, and the generated gas is supplied at a desired flow rate (for example, Patent Document 3).
- liquid raw materials such as trimethylaluminum (TMAl), tetraethyl orthosilicate (TEOS), and disilicon hexachloride (HCDS) are pumped to the vaporization chamber, where they are heated by a heater.
- the flow rate of the raw material gas generated in the vaporization chamber is controlled by a pressure-type flow rate control device downstream, and the gas is supplied to the process chamber.
- the pressure sensor of the pressure type flow control device located on the downstream side of the vaporization supply device receives high-temperature gas and may be heated from the surroundings to a high temperature of, for example, 200 ° C. or higher by a heater to prevent reliquefaction. .. Further, when the stop valve on the downstream side is closed, for example, a high-pressure gas of 200 kPa or more may be applied as a load. Therefore, the pressure sensor in this application is required to be able to operate appropriately even in a high temperature and high pressure environment.
- the vaporization supply device and the pressure type flow rate control device may be arranged in the vicinity of the process chamber as an integrated gas supply device. In this case, in order to occupy as little valuable equipment installation space as possible around the process chamber, it is required to reduce the size of the entire device including the pressure sensor as much as possible.
- the pressure sensor described in Patent Document 2 is a compact and high temperature pressure sensor, and has a pressure protruding from the mounting surface of the body (a metal main body block in which a flow path is formed).
- the sensor is fixed.
- the fixing to the body is performed by using a small mounting member separate from the sensor module, it is possible to design the entire device in a small size.
- stress is not easily transmitted to the diaphragm, so that it is possible to suppress a decrease in accuracy of the sensor output due to an unintended external stress.
- the inventor of the present application has discovered that the sensor output (particularly the zero point output) can become unstable when a compact and high temperature pressure sensor having a portion protruding from the mounting surface of the body is used as it is. Then, it was found that the cause was a temperature change or temperature non-uniformity in the pressure sensor main body and the surrounding environment.
- the present invention has been made to solve the above problems, and to provide a pressure sensor device capable of ensuring output stability even when used in a high temperature environment, and a cover component for the pressure sensor used therefor. Is its main purpose.
- the cover component according to the embodiment of the present invention is used for a pressure sensor having a protrusion that is fixed to a mounting surface of a body on which a flow path is formed and protrudes from the mounting surface when fixed, and the pressure sensor. It is provided with a perforated member having an inner peripheral surface facing the side surface of the protruding portion of the above, and a lid member fixed to the perforated member and covering the protruding portion of the pressure sensor.
- the perforated member and the lid member are made of different materials, and the thermal conductivity of the perforated member is higher than the thermal conductivity of the lid member.
- the lid member is formed with a hole or notch for the cable of the pressure sensor to pass through, and the cover component is fixed to the lid member and extends from the lid member.
- a cable fixture for holding the cable is further provided.
- the pressure sensor device includes any of the above-mentioned cover parts attached to the body and a pressure sensor attached to the body and covered with any of the above-mentioned cover parts.
- the pressure sensor is a bottomed tubular sensor module having a pressure receiving chamber inside that includes a diaphragm as a pressure sensitive portion and communicates with a flow path of the body, and is a sensor to which a pressure detecting element is attached. It is a diaphragm type pressure sensor having a module and a hermetic cover surrounding a vacuum chamber separated from the pressure receiving chamber by the diaphragm.
- the pressure sensor device provided with the cover component according to the embodiment of the present invention, it is possible to maintain the thermalization of the small pressure sensor for high temperature, so that the output stability is ensured when used in a high temperature environment. can.
- FIG. 1 shows a gas supply system 100 composed of a pressure type flow control device 20 including a pressure sensor device 10 according to an embodiment of the present invention and a vaporization supply device 30 provided on the upstream side thereof.
- 2 and 3 show the pressure sensor 1 and the pressure sensor device 10 used in this embodiment.
- the pressure sensor 1 and the cover component 3 (described later) surrounding the pressure sensor 1 are referred to as a pressure sensor device 10 for convenience, and are distinguished from the pressure sensor itself.
- the pressure sensor device 10 is a device having a function of measuring pressure, and can be generally referred to as a pressure sensor without particular distinction.
- the pressure sensor device 10 of the present embodiment is arranged in the flow path between the control valve 22 of the pressure type flow control device 20 and the throttle portion 24, and the pressure on the upstream side of the throttle portion 24 ( It is used as an upstream pressure sensor for detecting the upstream pressure P1 or the control pressure P1).
- the output of the pressure sensor device 10 is used for feedback control of the control valve 22, and the flow rate of the fluid flowing downstream of the throttle portion 24 can be controlled by controlling the upstream pressure P1 using the control valve 22. It is possible.
- the critical expansion condition P1 / P2 ⁇ about 2 (however, P1 is the upstream pressure, P2 is the downstream pressure which is the pressure on the downstream side of the throttle portion 24, and about 2 is nitrogen.
- P1 is the upstream pressure
- P2 is the downstream pressure which is the pressure on the downstream side of the throttle portion 24, and about 2 is nitrogen.
- the flow rate of the gas passing through the throttle portion 24 is fixed to the speed of sound, and the mass flow rate is controlled by using the principle that the mass flow rate is determined by the upstream pressure P1 regardless of the downstream pressure P2.
- a downstream pressure sensor for measuring the pressure on the downstream side of the throttle portion 24 (downstream pressure P2) may be provided.
- Q K 2 ⁇ P2 m (P1-P2) n (where K 2 is a fluid, based on the upstream pressure P1 and the downstream pressure P2).
- the flow rate Q can be calculated from the constants m and n that depend on the type and the fluid temperature (an index derived based on the actual flow rate).
- the pressure type flow rate control device 20 controls the control valve 22 by feedback control so that the flow rate Q calculated based on the measured upstream pressure P1 (or upstream pressure P1 and downstream pressure P2) approaches the input set flow rate. Adjust the opening of. As a result, the gas can flow to the downstream side of the throttle portion 24 at a set flow rate.
- the flow rate obtained by the calculation as described above may be displayed externally as a flow rate output value.
- a supply pressure sensor device 10'for measuring the pressure (supply pressure P0) on the upstream side of the control valve 22 is provided.
- the output of the supply pressure sensor device 10' is used, for example, for controlling the amount of gas generated in the vaporization supply device 30.
- the supply pressure sensor device 10' is also required to operate appropriately even in a high temperature environment, like the pressure sensor device 10.
- a stop valve 28 is provided on the downstream side of the throttle portion 24 of the pressure type flow rate control device 20. By closing the stop valve 28, the gas supply can be reliably stopped as compared with the case where only the control valve 22 is closed.
- control valve 22 used in the pressure type flow rate control device 20 various valves that can be adjusted to an arbitrary opening degree are used.
- a piezo valve configured to adjust the opening degree of the diaphragm valve by a piezo actuator is preferable.
- an air-driven valve (AOV) or a solenoid valve having excellent responsiveness and breaking property is preferably used.
- An orifice plate or a critical nozzle is preferably used as the throttle portion 24, and the orifice diameter or the nozzle diameter is set to, for example, 10 ⁇ m to 2000 ⁇ m.
- the vaporization supply device 30 provided in the gas supply system 100 receives the liquid raw material L, vaporizes it, and sends it to the pressure type flow rate control device 20 as the gas G.
- the vaporization supply device 30 has a preheating unit 32 for preheating the liquid raw material L and a vaporization unit 34 connected to the preheating unit 32 via the liquid material supply valve 36, and the liquid material supply valve 36.
- the supply amount of the liquid raw material to the vaporizing unit 34 can be controlled by the opening / closing operation of.
- the preheating unit 32 of the vaporization supply device 30 is heated to, for example, 180 ° C. by a heater, and the vaporization unit 34 is heated to, for example, 200 ° C., and pressure type flow rate control is performed to prevent reliquefaction of the delivered gas.
- the device 20 is heated to, for example, 210 ° C. or higher. Therefore, the pressure sensor device 10 is also heated to a high temperature of 200 ° C. or higher, and it is required to accurately detect the pressure even in such a high temperature environment.
- the stop valve 28 is also heated by the heater, and the outlet side of the stop valve 28 is heated to, for example, 220 ° C.
- the set temperature of each heater may be arbitrarily selected depending on the material to be vaporized.
- FIG. 2 shows a diaphragm type pressure sensor 1 used in the pressure sensor device 10 of the present embodiment.
- FIG. 3 shows a pressure sensor device 10 configured by covering the pressure sensor 1 with a cover component 3 as a heat insulating member.
- the pressure sensor 1 used in the present embodiment may have the same structure as the pressure sensor described in Patent Document 2, and is designed as a small pressure sensor for high temperature.
- the pressure sensor 1 is fixed to the body 5 in which the flow path F1 is formed so as to have a portion protruding from the mounting surface 5S.
- the body 5 is a metal block (for example, made of SUS316L) in which the flow path of the pressure type flow rate control device 20 shown in FIG. 1 is formed, and the control valve 22 or the like is on the upper surface side of the body 5. Is attached.
- FIG. 1 shows the pressure sensor device 10 connected to the lower side of the flow path
- the pressure sensor device 10 is actually mounted on the mounting surface 5S on the upper surface of the body 5 as shown in FIG. It is fixed side by side with the control valve 22. Further, the supply pressure sensor device 10'is also fixed to the mounting surface 5S on the upper surface of the body 5 in the same manner.
- the surface on which the mounting surface 5S is formed may be referred to as the upper surface of the body 5 according to the drawings, but the mounting surface 5S may be in the vertical direction depending on the posture of the pressure type flow rate control device 20. Needless to say, it may be a surface in any direction such as an upper surface, a lower surface, and a side surface.
- the pressure sensor device 10 is not limited to the surface of the body 5 to which the control valve 22 is attached, and may be fixed on the surface on the opposite side or the side surface thereof.
- the pressure sensor 1 is a tubular member 11 that is airtightly attached to the body 5, and a bottomed tubular sensor module 12 that is airtightly connected to the tubular member 11 and detects the pressure of a fluid flowing through a flow path.
- the tubular member 11 and the sensor module 12 are tightly fixed by welding (electron beam welding, laser welding, etc.) between the end flanges.
- the tubular member 11 and the sensor module 12 are hermetically fixed by firmly fixing each other's flange portions with screws or the like while interposing a gasket. May be good.
- the sensor module 12 has a diaphragm 12a as a pressure-sensitive portion, and the pressure receiving chamber C1 surrounded by the diaphragm 12a and the side cylinder passes through the inside of the tubular member 11 and communicates with the flow path F1 of the body 5. are doing.
- a pressure detecting element 12b having a strain gauge is fixed to the surface of the diaphragm 12a opposite to the pressure receiving chamber C1. Further, on the opposite side of the diaphragm 12a, a vacuum chamber C2 is provided so as to face the pressure receiving chamber C1.
- the vacuum chamber C2 is a vacuum sealing space formed by airtightly fixing the hermetic cover 13 to the sensor module 12 with a gap between the hermetic cover 13 and the diaphragm 12a.
- the hermetic cover 13 is hermetically connected to the base ring 13a, which is hermetically fitted and fixed to the outer peripheral surface of the sensor module 12, and one end surface is airtightly connected to one end surface of the base ring 13a. It has a tubular hermetic ring 13b and a closing plate 13c that is airtightly connected to the other end surface of the hermetic ring 13b and forms a vacuum chamber C2 between the diaphragm 12a.
- the base ring 13a, the hermetic ring 13b, and the closing plate 13c are hermetically fixed by welding or the like.
- the hermetic ring 13b is provided with a low melting point glass material 15 through which a plurality of lead wires 12c connected to the strain gauge of the pressure detecting element 12b penetrate.
- the strain gauge is usually composed of a metal leaf resistance wire, and detects the magnitude of strain generated in the diaphragm 12a by detecting a change in the electrical resistance of the resistance wire by a connected bridge circuit. Can be done.
- the pressure sensor 1 shown in the figure is provided with a cover body 14 that covers the upper surface (closing plate 13c) of the hermetic cover 13.
- the cover body 14 can hold the plurality of lead wires 12c in a right angle state.
- the cover body 14 is formed of an L-shaped annular cross section by a synthetic resin material, and is covered with the hermetic cover 13. However, the cover body 14 may be omitted if it is not necessary to hold the lead wire 12c.
- the pressure sensor 1 having the above configuration is configured to output zero as an absolute pressure when no stress is generated in the diaphragm 12a, that is, when the pressures in the pressure receiving chamber C1 and the vacuum chamber C2 are considered to be equivalent. Has been done. Further, a strain having a magnitude corresponding to the pressure of the pressure receiving chamber C1, that is, the pressure of the gas flowing in the flow path F1 is generated in the diaphragm 12a, and the magnitude of the strain is measured by the pressure detecting element 12b to measure the gas. The pressure can be detected.
- the tubular member 11 is one of Hastelloy C-22 (Hastelloy is a registered trademark), which is one of nickel-molybdenum-chromium alloys having excellent corrosion resistance, or one of austenitic stainless steels having excellent corrosion resistance. It is formed by SUS316L. Further, the inner peripheral surface of the tubular member 11 is subjected to electrolytic polishing treatment.
- the sensor module 12 including the diaphragm 12a is formed of spron 510 (spron is a registered trademark), which is one of the cobalt-nickel alloys having excellent corrosion resistance, proof stress and elasticity.
- the base ring 13a constituting the hermetic cover 13 is formed of a nickel-molybdenum-chromium alloy or stainless steel (for example, SUS316L or the like) having excellent corrosion resistance, and the hermetic ring 13b and the closing plate 13c have excellent corrosion resistance and the like. It is made of stainless steel (for example, SUS316L or the like).
- the pressure sensor 1 (more specifically, the tubular member 11) is hermetically attached and fixed by a gasket 16, a washer 17, and a bonnet nut 18 in a state of communicating with the flow path F1 of the body 5.
- a circular insertion hole 19 for attaching the tubular member 11 of the pressure sensor 1 is formed in the body 5, and a bonnet nut 18 is detachably screwed to the inner peripheral surface of the insertion hole 19.
- a female screw is formed.
- the gasket 16 is formed of austenitic stainless steel in a ring shape having a size to be inserted into the insertion hole 19 of the body 5, and has a rectangular cross-sectional shape. One end surface of the gasket 16 comes into contact with the bottom surface of the insertion hole 19 of the body 5, and the other end surface of the gasket 16 comes into contact with the outer end surface of the mounting flange portion formed on the tubular member 11. ing.
- the cross-sectional shape of the gasket 16 may be circular or polygonal.
- the outer diameter of the cover body 14 is 20 mm
- the height of the sensor module 12 is 9.7 mm
- the outer diameter of the cylindrical portion of the sensor module 12 is 13 mm
- the inner diameter of the sensor module is 8 mm
- the shape is tubular.
- the outer diameter of the member 11 is set to 10 mm (the mounting flange is 12 mm), and the inner diameter of the tubular member 11 is set to 8 mm.
- the pressure sensor device 10 of the present embodiment is composed of the pressure sensor 1 described above and a cover component 3 covering the side surface and the upper surface thereof.
- the cover component 3 is fixed to a perforated member 3a having an inner peripheral surface facing the side surface of a protrusion from the mounting surface 5S of the pressure sensor 1 and to the upper surface of the perforated member 3a. It is composed of a lid member 3b that covers the upper surface of the pressure sensor 1.
- the cover component 3 is fixed to the body 5 and covers the outside of the pressure sensor 1, so that the pressure sensor 1 can be kept warm and a sudden change in temperature can be prevented.
- the temperature uniformity of the pressure sensor 1 can be improved.
- the pressure sensor 1 may be heated from the outside by a heater at a set temperature of, for example, about 200 ° C. to prevent reliquefaction of the gas, but even under such a high temperature, the temperature uniformity and heat retention are as good as possible. If is maintained, the sensor output, especially the zero point output, can be stabilized.
- the perforated member 3a is formed of a metal material having a relatively high thermal conductivity, while the lid member 3b has high temperature resistance and a relatively low thermal conductivity. Formed from a resin material. More specifically, the perforated member 3a is formed of, for example, aluminum, silver, graphene, etc., and the lid member 3b is formed of, for example, PEEK (polyetheretherketone).
- the perforated member 3a By forming the perforated member 3a from, for example, an aluminum perforated block material that is in close contact with the body 5, the ambient temperature of the side surface of the pressure sensor 1 tends to be equal to the temperature of the body 5. Further, since the thermal conductivity is relatively high, the entire perforated member 3a is easily heated to a uniform temperature, and therefore the temperature uniformity of the pressure sensor 1 can be improved.
- the outer surface of the perforated member 3a is polished. Since the heat reflectance is improved by using the outer surface as a polished surface, it is possible to reduce heat dissipation to the outside and efficiently dissipate heat to the inside. Further, by reducing the amount of heat radiated to the outside, there is an advantage that measures against high temperature can be taken relatively easily.
- the inner surface that is, the surface facing the pressure sensor 1 is anodized (particularly hard anodized).
- the inner surface is anodized, the emissivity is improved and the heat dissipation to the inside is improved, so that most of the heat from the perforated member 3a can be released to the inside. Therefore, it is possible to suppress heat radiation to the outside and improve the temperature retention in the inner space.
- the lid member 3b by forming the lid member 3b from a material having high heat retention such as PEEK, it is easy to maintain the inner space of the cover component 3 at a high temperature, and it is easy to keep the temperature around the pressure sensor 1 constant. Further, by using the lid member 3b as a resin material, the lead wire 12c that transmits the pressure signal does not come into contact with the metal member, so that the possibility of electrical and thermal disturbances in the lead wire 12c can be reduced. ..
- FIG. 4A shows a state before assembly of the cover component 3 used in the pressure sensor device 10 for measuring the upstream pressure P1
- FIG. 4B shows a state after assembly of the cover component 3.
- an aluminum perforated member 3a provided with a columnar sensor hole 9a is formed in a rectangular parallelepiped shape, and this is fixed to the body 5 (see FIG. 3).
- the perforated member 3a is fixed by tightening the screws 7 to the body through the fixing through holes at the four corners.
- the perforated member 3a does not necessarily have to be formed of an integral metal block, and may be configured by combining a plurality of metal block bodies.
- the perforated member 3a may be configured by using, for example, two block bodies having a shape separated by the center line of the sensor hole 9a. In this case, in order to form the sensor hole 9a on the end face of each block body.
- Each of the recesses is provided, and the sensor hole 9a is formed by combining the recesses.
- the PEEK lid member 3b is fixed to the upper surface of the perforated member 3a by the screw 8. Further, in the lid member 3b, a cable hole 9b for passing a signal cable in which a plurality of lead wires 12c extending from the pressure sensor 1 are passed is provided at the position of the sensor hole 9a of the perforated member 3a.
- the signal cable connected to the pressure detection element can be connected to an external bridge circuit via the cable hole 9b, whereby the pressure detection result can be obtained.
- a metal cable fixing tool 3c fixed by a screw or the like is provided in the vicinity of the cable hole 9b of the lid member 3b.
- the cable fixture 3c is provided to hold and secure the signal cable connected to the pressure sensor.
- FIG. 5 shows how the lead wire 12c (sometimes referred to as a signal cable 12c) is fixed on the lid member 3b by the cable fixing tool 3c.
- the cable fixture 3c can fix the cable by screwing the plate-shaped fixture from the outside with the signal cable sandwiched between the receivers having an L-shaped cross section fixed to the lid member 3b. ..
- the signal cable 12c By fixing the signal cable 12c so as not to move on the lid member 3b in this way, the signal cable extending from the pressure sensor 1 becomes difficult to move inside the cover component 3 due to external stress, vibration, or temperature change. .. As a result, noise components are prevented from being added to the signal, and the signal quality can be improved.
- the cable fixing tool 3c may be used for fixing another cable such as a power cable.
- the cable fixture 3c can be used for holding and fixing various cables and wiring, and in the present specification, the "cable" includes a signal cable and a power cable.
- the pressure sensor device 10 equipped with the cover component 3 configured as described above is suitably used as a pressure sensor for small size and high temperature, and in particular, since the zero point output can be stably maintained, it is incorporated into the pressure type flow control device. Therefore, it can be expected to secure high-precision flow rate accuracy over a long period of time.
- FIG. 6A shows a state before assembling the cover part 3 of another aspect
- FIG. 6B shows a state after assembling the cover part 3.
- the cover component 3 shown in FIGS. 6A and 6B is another aspect of the cover component 3 used in the supply pressure sensor device 10'for measuring the supply pressure P0 shown in FIG.
- FIG. 7 shows a state in which the signal cable 12c is fixed on the lid member 3b by the cable fixing tool 3c in the cover component 3 shown in FIGS. 6A and 6B.
- the perforated member 3a is a circular ring-shaped aluminum block provided with a sensor hole 9a in the center.
- the lid member 3b is a circular plate member made of PEEK having a shape corresponding to the perforated member 3a.
- a cable hole 9b is provided in the central portion.
- a cable fixing tool 3c for fixing the signal cable 12c connected to the pressure sensor and extending outward via the cable hole 9b is provided.
- the cover component 3 is provided so as to cover the pressure sensor for measuring the supply pressure P0 to improve heat retention and heat equalization, and the movement of the signal cable is restricted by the cable fixture 3c. Therefore, an appropriate sensor output can be obtained even in a high temperature environment.
- the cover component 3 may be designed in any shape. Since many parts are densely arranged around the pressure sensor 1 that measures the upstream pressure P1, the form shown in FIGS. 4 and 5 is adopted in order to avoid interference with other parts. However, if interference with other parts is not a problem, a simpler form as shown in FIGS. 6 and 7 can be adopted.
- FIG. 8 (a) to 8 (c) are views showing still another aspect of the cover component.
- 8 (a) and 8 (b) show a state before the lid member 3b is attached, that is, a state in which only the metal perforated member 3a is fixed to the body.
- FIG. 8C shows a lid member 3b fixed on the perforated member 3a.
- the lid member 3b is provided with a notch 9b'for passing the cable from the pressure sensor.
- the cable is not fixed on the lid member 3b, but is fixed by using the cable fixing tool 3c'which is fixed to the chassis at a place slightly away from the cover component 3. Even in such an embodiment, it is possible to keep the pressure sensor warm and soak the heat, prevent unnecessary movement of the cable, and stabilize the sensor output even in a high temperature environment.
- the embodiments of the present invention have been described above, various modifications are possible.
- the embodiment in which the cover component is provided in the pressure sensor for measuring the supply pressure P0 and the control pressure P1 has been described above, but when the downstream pressure sensor for measuring the downstream pressure P2 on the downstream side of the throttle portion 24 is used, this is used.
- a cover component may also be provided on the downstream pressure sensor to stabilize the sensor output.
- the lid member 3b may be configured by combining two parts in a half-split state or three or more parts.
- the cover component according to the embodiment of the present invention and the pressure sensor device including the cover component are suitably used for, for example, measuring the pressure of high temperature gas in a semiconductor manufacturing device.
- Pressure sensor 3 Cover part 3a Perforated member 3b Lid member 3c Cable fixture 5 Body 7 Screw 9a Sensor hole 9b Cable hole 9b'Notch 10 Pressure sensor device 11 Cylindrical member 12 Sensor module 12a Diaphragm 12b Pressure detection element 12c Lead Wire (signal cable) 13 Hermetic cover 14 Cover body 16 Gasket 18 Bonnet nut 20 Pressure type flow control device 22 Control valve 24 Squeezing part 26 Inflow pressure sensor 28 Stop valve 30 Vaporization supply device 100 Gas supply system C1 Pressure receiving chamber C2 Vacuum chamber F1 Flow path
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
3 カバー部品
3a 穴開き部材
3b 蓋部材
3c ケーブル固定具
5 ボディ
7 ねじ
9a センサ孔
9b ケーブル孔
9b’ 切り欠き
10 圧力センサ装置
11 筒状部材
12 センサモジュール
12a ダイヤフラム
12b 圧力検出素子
12c リード線 (信号ケーブル)
13 ハーメチックカバー
14 カバー体
16 ガスケット
18 ボンネットナット
20 圧力式流量制御装置
22 コントロール弁
24 絞り部
26 流入圧力センサ
28 ストップバルブ
30 気化供給装置
100 ガス供給系
C1 受圧室
C2 真空室
F1 流路
Claims (5)
- 流路が形成されたボディの取り付け面に固定され、固定されたときに前記取り付け面から突出する突出部を有する圧力センサのためのカバー部品であって、
前記圧力センサの突出部の側面と対向する内周面を有する穴開き部材と、
前記穴開き部材に対して固定され、前記圧力センサの突出部を覆う蓋部材と
を備える、カバー部品。 - 前記穴開き部材と前記蓋部材とは異なる材料から形成されており、前記穴開き部材の熱伝導率は前記蓋部材の熱伝導率よりも高い、請求項1に記載のカバー部品。
- 前記蓋部材には、前記圧力センサが有するケーブルを通過させるための孔または切り欠きが形成されており、
前記蓋部材に固定され、前記蓋部材から延びる前記ケーブルを保持するケーブル固定具をさらに備える、請求項1または2に記載のカバー部品。 - 前記ボディに取り付けられた請求項1から3のいずれかに記載のカバー部品と、
前記ボディに取り付けられ請求項1から3のいずれかに記載のカバー部品によって覆われた圧力センサと
を備える、圧力センサ装置。 - 前記圧力センサは、感圧部としてのダイヤフラムを含み前記ボディの流路と連通する受圧室を内側に有する有底筒状のセンサモジュールであって圧力検出素子が取り付けられたセンサモジュールと、前記ダイヤフラムによって前記受圧室と隔てられた真空室を包囲するハーメチックカバーとを有するダイヤフラム式の圧力センサである、請求項4に記載の圧力センサ装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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KR1020237004684A KR20230035405A (ko) | 2020-10-15 | 2021-09-14 | 압력 센서용의 커버 부품 및 이것을 구비하는 압력 센서 장치 |
JP2022557288A JP7455432B2 (ja) | 2020-10-15 | 2021-09-14 | 圧力センサ用のカバー部品およびこれを備える圧力センサ装置 |
US18/040,917 US20230296464A1 (en) | 2020-10-15 | 2021-09-14 | Cover component for pressure sensor, and pressure sensor device comprising same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2020-173730 | 2020-10-15 | ||
JP2020173730 | 2020-10-15 |
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WO2022080069A1 true WO2022080069A1 (ja) | 2022-04-21 |
Family
ID=81209049
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PCT/JP2021/033812 WO2022080069A1 (ja) | 2020-10-15 | 2021-09-14 | 圧力センサ用のカバー部品およびこれを備える圧力センサ装置 |
Country Status (5)
Country | Link |
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US (1) | US20230296464A1 (ja) |
JP (1) | JP7455432B2 (ja) |
KR (1) | KR20230035405A (ja) |
TW (1) | TWI800020B (ja) |
WO (1) | WO2022080069A1 (ja) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5115676A (en) * | 1990-01-10 | 1992-05-26 | Setra Systems, Inc. | Flush-mounted pressure sensor |
US5410916A (en) * | 1994-06-24 | 1995-05-02 | Honeywell Inc. | Flowthrough pressure sensor |
JP2000304637A (ja) * | 1999-04-21 | 2000-11-02 | Nippon Seiki Co Ltd | 圧力検出器 |
US20090260445A1 (en) * | 2008-03-28 | 2009-10-22 | Vega Grieshaber Kg | Protective hood with a housing for the protection of a measuring apparatus |
US20120297886A1 (en) * | 2009-10-14 | 2012-11-29 | Chul-Sub Lee | Vertical Pressure Sensor |
WO2020075600A1 (ja) * | 2018-10-09 | 2020-04-16 | 株式会社フジキン | 圧力センサ |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2305030C3 (de) | 1973-02-02 | 1983-02-10 | Wäschle Maschinenfabrik GmbH, 7980 Ravensburg | Anlage zum pneumatischen Fördern von Schüttgütern |
JP5819096B2 (ja) | 2011-04-28 | 2015-11-18 | 富士通コンポーネント株式会社 | 接触端子装置 |
JP5594541B2 (ja) * | 2012-02-09 | 2014-09-24 | Smc株式会社 | 圧力検出器 |
JP6373104B2 (ja) | 2014-07-18 | 2018-08-15 | 株式会社フジクラ | 半導体圧力センサ及び半導体圧力センサ取付構造体 |
JP6775997B2 (ja) * | 2016-05-13 | 2020-10-28 | 株式会社エンプラス | 電気部品用ソケット |
JP7132631B2 (ja) | 2017-07-25 | 2022-09-07 | 株式会社フジキン | 流体制御装置 |
-
2021
- 2021-09-14 WO PCT/JP2021/033812 patent/WO2022080069A1/ja active Application Filing
- 2021-09-14 US US18/040,917 patent/US20230296464A1/en active Pending
- 2021-09-14 JP JP2022557288A patent/JP7455432B2/ja active Active
- 2021-09-14 KR KR1020237004684A patent/KR20230035405A/ko unknown
- 2021-10-04 TW TW110136819A patent/TWI800020B/zh active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5115676A (en) * | 1990-01-10 | 1992-05-26 | Setra Systems, Inc. | Flush-mounted pressure sensor |
US5410916A (en) * | 1994-06-24 | 1995-05-02 | Honeywell Inc. | Flowthrough pressure sensor |
JP2000304637A (ja) * | 1999-04-21 | 2000-11-02 | Nippon Seiki Co Ltd | 圧力検出器 |
US20090260445A1 (en) * | 2008-03-28 | 2009-10-22 | Vega Grieshaber Kg | Protective hood with a housing for the protection of a measuring apparatus |
US20120297886A1 (en) * | 2009-10-14 | 2012-11-29 | Chul-Sub Lee | Vertical Pressure Sensor |
WO2020075600A1 (ja) * | 2018-10-09 | 2020-04-16 | 株式会社フジキン | 圧力センサ |
Also Published As
Publication number | Publication date |
---|---|
KR20230035405A (ko) | 2023-03-13 |
TWI800020B (zh) | 2023-04-21 |
JP7455432B2 (ja) | 2024-03-26 |
US20230296464A1 (en) | 2023-09-21 |
JPWO2022080069A1 (ja) | 2022-04-21 |
TW202225652A (zh) | 2022-07-01 |
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