WO2014181522A1 - 脆性破壊性板材の固定構造及びこれを用いた脆性破壊性板材から成る光透過窓板の固定方法 - Google Patents
脆性破壊性板材の固定構造及びこれを用いた脆性破壊性板材から成る光透過窓板の固定方法 Download PDFInfo
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- WO2014181522A1 WO2014181522A1 PCT/JP2014/002333 JP2014002333W WO2014181522A1 WO 2014181522 A1 WO2014181522 A1 WO 2014181522A1 JP 2014002333 W JP2014002333 W JP 2014002333W WO 2014181522 A1 WO2014181522 A1 WO 2014181522A1
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- Prior art keywords
- fixing
- flange
- brittle
- light
- fixed
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims description 14
- 229910052594 sapphire Inorganic materials 0.000 claims abstract description 22
- 239000010980 sapphire Substances 0.000 claims abstract description 22
- 239000013307 optical fiber Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 68
- 238000003780 insertion Methods 0.000 claims description 33
- 230000037431 insertion Effects 0.000 claims description 33
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 abstract description 42
- 238000005259 measurement Methods 0.000 abstract description 10
- 239000002245 particle Substances 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 description 38
- 239000007789 gas Substances 0.000 description 30
- 238000001514 detection method Methods 0.000 description 23
- 230000003287 optical effect Effects 0.000 description 18
- 239000003566 sealing material Substances 0.000 description 11
- 238000005219 brazing Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 5
- 239000010931 gold Substances 0.000 description 5
- 229910052737 gold Inorganic materials 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000002835 absorbance Methods 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000011481 absorbance measurement Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/0303—Optical path conditioning in cuvettes, e.g. windows; adapted optical elements or systems; path modifying or adjustment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/0403—Mechanical elements; Supports for optical elements; Scanning arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0875—Windows; Arrangements for fastening thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/05—Flow-through cuvettes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
- G01N21/5907—Densitometers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/02—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of crystals, e.g. rock-salt, semi-conductors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/02—Viewing or reading apparatus
- G02B27/022—Viewing apparatus
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/02—Viewing or reading apparatus
- G02B27/028—Viewing or reading apparatus characterised by the supporting structure
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/007—Pressure-resistant sight glasses
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0014—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation from gases, flames
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
Definitions
- the present invention relates to an improvement in the fixing structure of a brittle destructible plate material such as quartz glass or sapphire plate material, and mainly an in-line type optical analytical process fluid concentration meter used in a raw material fluid supply device of a semiconductor manufacturing apparatus, etc.
- the light transmission window material can be fixed and held airtight without using a sealing material for highly precipitation, high light reactivity, and corrosive process fluids.
- a fixing structure of a brittle destructible plate material that can maintain high transparency and high cleanliness (particle resistance) inside the sensor for a long period of time, and a light transmission window plate comprising a brittle destructible plate material using the same It relates to the fixing method.
- a raw material fluid supply device or the like of a semiconductor manufacturing apparatus needs to supply a process raw material fluid having a stable concentration to a processing device from the viewpoint of improving the quality of a semiconductor product. Therefore, in this conventional raw material fluid supply device, for example, a bubbling-type raw material fluid supply device as shown in FIG. 9, a photometric densitometer 22 is provided in the vicinity of the raw material vapor outlet of the temperature-controlled raw material tank 21.
- a process gas 24 for example, a predetermined raw material concentration
- Process gas containing an organic metal material vapor such as trimethylgallium TMGa stored in the tank 21 is supplied.
- 25 is a thermal mass flow controller
- 26 is a pressure adjusting device for tank internal pressure.
- densitometers 22 of various configurations have been put to practical use.
- Most densitometers 22 are shown in FIG. 10 (Japanese Patent Laid-Open No. 9-178652) and FIG. As shown in No. 108981), an optical cell (gas cell) 27 through which the gas G to be measured flows, a light source 28 for irradiating the optical cell 27 with a light beam, a light receiving device 29 for the light beam that has passed through the optical cell 27, It is formed of an arithmetic unit 30 or the like that calculates the raw material concentration by obtaining the absorbance from the signal of the light receiving device 29.
- 31 is a main pipeline and 32 is a branch pipeline.
- photometric densitometer 22 itself is well known, and a detailed description thereof is omitted here.
- various structures forming the optical cell 27 such as a light transmission window material, are firmly attached to the main body of the optical cell 27 with high airtightness. Must be fixedly held. Therefore, in the conventional optical cell 27, various synthetic resin sealing materials, silver brazing, gold brazing and the like are used.
- the transparency of the light transmission window material forming the optical cell 27 needs to be stable over a long period of time, and when the transparency changes with time. This makes it difficult to measure a stable gas concentration.
- quartz glass is often used as a constituent material of the light transmission window. Therefore, the light transmission window is corroded when measuring the concentration of organic source gas having high corrosivity or high precipitation.
- the transparency of the raw material is lowered at an early stage due to the deposition of the raw material, and there remains a problem that a stable raw material gas concentration cannot be measured.
- the conventional optical analysis type densitometer has many features such as downsizing equipment, reducing equipment costs, ensuring stability of concentration measurement accuracy, maintaining high gas purity, and maintaining gas tightness.
- the transparency of the light-transmitting window material is caused by securing the sealing property between the light-transmitting window material and the structure, preventing the gas purity from being lowered by using the sealing material, and the corrosiveness of the organic source gas.
- the present invention has the above-mentioned problems in the raw material concentration meter used in the conventional raw material fluid supply device, that is, (I) when the light transmission window material is fixedly held using a sealing material or the like, The purity of the fluid is likely to be lowered due to the emission of particles from the sealing material itself or the release gas such as moisture, (II) the simplification and downsizing of the structure of the densitometer and the reduction of the product cost cannot be easily achieved (III ) Since the transparency of the light transmission window fluctuates, stable and highly accurate measurement of the raw material fluid concentration cannot be performed, and (IV) it is difficult to improve the airtight performance of the connection portion between the optical cell and the conduit.
- a brittle destructible plate material (light transmission window material) that forms a sensor part without using a seal material is fixed and held in a highly airtight manner, and a brittle destructible plate material using the mechanism is used.
- Light transmission window plate fixing method The main object of the present invention is to provide an organic raw material fluid that can be easily and leak-free inserted into and fixed in the fluid passage, and can perform highly accurate and stable concentration measurement.
- An in-line optical analytical process fluid concentration meter that is small and inexpensive to manufacture.
- the first aspect of the brittle fracture destructible plate material fixing structure includes a light transmission window plate made of a brittle destructive plate material sandwiched between a first fixed flange and a second fixed flange.
- the two fixing flanges are hermetically fitted and fixed.
- the second aspect of the structure for fixing a brittle destructible plate material according to the present invention has an insertion recess whose inner peripheral surface is reduced in a step shape by a plurality of steps, and the step portion in the insertion recess is made of a brittle destructive plate material.
- a first fixed flange as a support surface of the light transmissive window plate; a light transmissive window plate made of a brittle destructible plate material disposed on the support surface of the light transmissive window plate in the insertion recess of the first fixed flange; A second fixing flange that is airtightly fitted and fixed to the insertion recess by inserting a projection having a stepped outer peripheral surface into the insertion recess of the fixing flange and sandwiching the light transmission window plate made of the brittle destructible plate material; Prepare.
- the light transmitting window plate made of the brittle destructible plate material is a sapphire light transmitting window plate in the second aspect, and the first fixing flange is used. And the second fixing flange are held by a pressure of 6 to 12 N.
- the tip surface of the protruding portion of the second fixing flange and the support surface of the insertion recess of the first fixing flange are light transmissive.
- the sealing surface of the window plate was used.
- a gasket housing portion is formed on the lower surface side of the first fixing flange, and the bottom surface of the gasket housing portion is a gasket seal surface. It was.
- the sixth aspect of the fixing structure of the brittle fracture plate according to the present invention is configured such that, in the second aspect, an optical fiber insertion hole and a photodiode housing recess are provided in the second fixing flange.
- a light transmission window plate comprising a brittle fracture material is fixed by sandwiching a light transmission window plate comprising a brittle fracture material between a first fixing flange and a second fixing flange. Is fitted and fixed, and a recess is provided on the surface of the main body, and a gasket-type seal is mounted therein, and then both the fixed and fixed flanges are mounted in the recess to mount the first fixed flange and the gasket. Both fixings that are fixedly fitted in the recesses by facing the mold seal, further arranging a holding fixing body surrounding the both fixing and fixing flanges, and fixing the holding fixing body to the main body. The flange is hermetically fixed through a gasket type seal.
- a light transmission window plate made of a brittle destructible plate material is sandwiched between the first fixing flange and the second fixing flange, and both the fixing flanges are hermetically fitted and fixed.
- the inner peripheral surface has an insertion concave portion whose diameter is reduced in a stepped manner by a plurality of steps, and the step in the insertion concave portion is used as a support surface of a light transmission window plate made of a brittle destructible plate material.
- the light transmission window plate which is a plate material 11 made of a brittle fracture material, is sandwiched between the first fixing flange 14 and the second fixing flange 16 to be fitted and fixed in an airtight manner, and the light transmission window plate is attached to be airtight.
- the two flanges that have been fitted and fixed are hermetically inserted into the recess 17 by the holding and fixing body 12 fixed to the main body 2, so that the light transmission window plate has higher airtightness without using a sealing material. Thus, it can be easily and firmly held and fixed.
- the light transmission window plate 11 is made of sapphire, the light transmittance does not decrease even if it is a depositing, reactive, or corrosive fluid, and stable and highly accurate concentration measurement is possible. Since the gasket type seal is used, it is possible to eliminate contamination of impurities in the fluid as compared with a seal structure using other synthetic resin seal material, silver wax material, gold wax material or the like.
- the fixing structure of the brittle destructible plate material according to the present invention and the fixing method of the light transmission window plate made of the brittle destructible plate material using the same are downsizing the equipment, reducing the equipment cost, maintaining the airtightness, It has excellent utility in terms of ensuring stability of concentration measurement accuracy and maintaining high gas purity.
- FIG. 1 It is a front view of the raw material fluid density
- FIG. 1 is a front view of a raw material fluid concentration detector to which a brittle fracture destructive plate fixing structure according to the present invention is applied
- FIG. 2 is a plan view thereof
- FIG. 3 is an application of a brittle destructible plate fixing structure according to the present invention.
- FIG. 4 is a longitudinal sectional view and a plan view of a holding and fixing body of the light incident portion.
- the raw material fluid concentration detector 1 to which the brittle fracture plate fixing structure of the present invention is applied includes a detector main body 2, an inlet block 3 and outlet blocks 4 fixed to both sides thereof as shown in FIGS. And a light incident part 5a provided on the upper surface side of the main body 2 of the detector, a light detection part 5b provided on the lower surface side of the main body 2 of the detector, and the like.
- the main body 2, the inlet block 3, and the outlet block 4 of the detector are made of stainless steel or the like, and are provided with fluid passages 2a and 2b, respectively.
- the inlet block 3 and the outlet block 4 are airtightly fixed to both sides of the main body 2 of the detector through bolts (not shown) through gasket type seals (not shown).
- 3b and 4b are joint parts
- 7 is a leak inspection hole
- 8 is a fixing bolt for the light incident part 5a.
- the light detection unit 5b is also fixed by a fixing bolt 8 (not shown) in the same manner as the light incident unit 5a.
- the light incident part 5a and the light detection part 5b are respectively provided on the upper surface side and the lower surface side of the main body 2 of the detector, and are visible from a light source device (not shown) including a light source, a diffraction grating, a mirror, and the like.
- a light source device including a light source, a diffraction grating, a mirror, and the like.
- FIG. 3 light having a predetermined wavelength in the region or ultraviolet region passes through an optical fiber 9 and is made of a plate material 11 made of a brittle fracture material in the light incident portion 5a, that is, a light transmission window plate 11a made of a sapphire light transmission plate.
- reference numeral 14 denotes a first fixing flange and 16 denotes a second fixing flange.
- the incident light passes through the sapphire light transmission window plate 11a and enters the fluid passage 2b, but a part of the incident light is sapphire light.
- the light is reflected by the transmission window plate 11 a and the intensity of the reflected light is detected by the photodiode 10.
- the light detection unit 5b is provided on the lower surface side of the detector body 2 obliquely below the light incident unit 5a so as to face the light incident unit 5a, and is incident from the light incident unit 5a through the fluid passage 2b. Light enters the photodiode (not shown) in the light detection section 5b through the sapphire light transmission window plate 11a, and the light intensity of the incident light is detected.
- the light intensity detected by the light detecting unit 5b on the lower surface side changes depending on the concentration of the raw material fluid (process fluid) flowing in the fluid passage 2b, and the detected light intensity signal is sent to a computing device (not shown).
- the raw material concentration in the raw material fluid is calculated.
- the raw material concentration C is basically calculated by the following equation (1) based on the absorbance A obtained with a spectrophotometer.
- I 0 is the incident light intensity from the light incident part 5a
- I is the transmitted light intensity (incident light intensity to the photodiode 10 of the light detection part 5b)
- ⁇ is the molar extinction coefficient of the raw material
- C is the raw material concentration
- A is the absorbance.
- the light incident part 5a and the light detection part 5b are identical in structure, and as shown in FIG. 3, a holding and fixing body 12 having a flange housing hole 12a in the center made of stainless steel, and a detector A first fixing flange 14 provided on the outer surface of the main body 2, a second fixing flange 16, a light transmission window plate 11 a made of sapphire that is airtightly sandwiched between the flanges 14 and 16, and a light transmission window plate 11 a It is formed of a photodiode 10 and the like that are positioned above and fixed to the second fixing flange 16.
- the brittle destructible plate material fixing structure of the present invention is composed of the second fixing flange 16 and the first fixing flange 14, and the protrusion 16b of the second fixing flange 16 is used as the first fixing flange as will be described later.
- 14 is inserted into the insertion recess 14b with a force of 8 to 12N, so that the front end surface of the protrusion 16b of the second fixing flange 16 and the support surface 14c of the insertion recess 14b of the first fixing flange 14 are light-transmitting window plates.
- the sealing surface 11a is airtightly integrated with a sapphire light transmissive window plate 11a, which is a brittle destructible plate material, sandwiched and fixed.
- the second fixing flange 16 and the first fixing flange 14 integrated by sandwiching the sapphire light transmission window plate 11a are inserted into the flange receiving hole 12a of the holding fixture 12, and then the holding fixture. 12 is press-fixed to the detector main body 2 with a gasket type seal 6 interposed between the fixing bolt 8 and the light incident portion 5a and the light detection portion 5b are hermetically fixed to the detector main body 2. .
- 17 is a recess formed on the outer surface of the main body 2 of the detector, 6a is a gasket, 13 is a sealing surface between both fixing flanges 14 and 16, and 14e is between the gasket 6a and the first fixing flange 14.
- the sealing surface 9a is an optical fiber insertion hole.
- the holding and fixing body 12 is provided with a flange receiving hole 12a at the center of a square steel plate having a thickness of 12 to 15 mm, and insertion holes for fixing bolts 8 on both sides thereof. 12b is provided.
- a lower end portion of the holding and fixing body 12 is formed with a step portion 12c that fits and presses the upper surface of the outer periphery of the first fixing flange 14, and the lower portion of the flange accommodation hole 12a is enlarged. The diameter is formed in the accommodating portion of the first fixed flange 14.
- the second fixing flange 16 constituting the fixing structure of the brittle destructible plate (light transmission window plate) is formed in a short cylindrical body made of stainless steel, and one side (lower surface) thereof.
- the central part is formed in a protruding part 16b whose diameter is reduced stepwise by two step parts 16a.
- the distal end surface 16d of the distal end portion of the projecting portion 16b having a reduced diameter is a seal surface that comes into contact with the thin light transmission window plate 11a having a thickness of about 0.8 to 1.5 mm.
- reference numeral 16c denotes a photodiode housing recess.
- the first fixing flange 14 is formed in a disk shape from stainless steel as shown in FIG. 6, and the diameter of the first fixing flange 14 is reduced in a step shape by a plurality of (in this case, three steps) step portions 14a. It is formed in the insertion recess 14b.
- the insertion recess 14b is formed in a penetrating shape and communicates with the recess 17 of the main body 2 of the detector (see FIG. 3).
- the intermediate portion of the three step portions 14a constitutes a housing portion for the light transmission window plate 11a, and the light transmission window plate 11a made of sapphire is formed on the support surface 14c which is the step portion of the intermediate portion. Placed and fixed.
- An accommodating portion 14d of the gasket 6a is formed on the lower surface side of the first fixing flange 14, and the upper half portion of the gasket type seal 6 is inserted and fixed therein.
- the protrusion 16b of the second fixing flange 16 is inserted into the insertion recess 14b.
- the both fixing flanges 14 and 16 are fixed and integrated.
- sandwiching the flange portion it comes into contact with the pressure contact surface between the outer peripheral surface of the protruding portion 16b of both the fixing flanges 14 and 16 and the inner peripheral surface of the insertion concave portion 14b, and the outer peripheral edge portion of the light transmission window plate 11a.
- the front end surface 16d of 16b and the light transmission window plate support surface 14c of the insertion recess 14b serve as sealing surfaces, respectively, and leakage of the fluid in the fluid passage to the outside is completely prevented.
- the gasket type seal 6 includes a gasket accommodating portion 14d of the first fixing flange 14, a gasket accommodating portion 17a on the detector body 2 side, a ring-shaped gasket 6a, and a ring-shaped seal.
- the retainer 6b, the ring-shaped guide ring 6c, and the like are configured to be double-sealed by the seal surfaces 15 and 15.
- the sapphire light transmission window plate 11a constituting the light transmission window made of the plate material 11 made of the brittle fracture material is a so-called high-purity alumina (Al 2 O 3 ) single crystal and is formed to a thickness of 0.8 to 1.5 mm. It has excellent wear resistance, corrosion resistance (chemical resistance), heat resistance, etc., and is hardly corroded or altered by organic raw material gas used for semiconductor manufacturing, and its light transparency hardly changes. It has been confirmed. Similarly, it is confirmed that the sapphire light transmission window plate 11a (outer diameter 5 to 15 mm) is not damaged at all by integrating both the fixing flanges 14 and 16 with a clamping force of 8 to 12N. ing.
- Al 2 O 3 high-purity alumina
- the gasket-type seal 6, the sapphire light transmission window plate 11a, the photodiode 10, and the like are well known, and detailed description thereof is omitted here.
- the raw material fluid concentration detector 1 is connected in-line to a process gas (organic raw material TMGa vapor) supply line for a semiconductor manufacturing apparatus, and light is incident from the light source device 18 through the optical fiber 9. Light was incident on the part 5a.
- the photodiodes 10 of the light incident part 5a and the light detection part 5b are selected to have a light receiving surface of 1.0 mm ⁇ 1.1 mm, a diameter of 504 mm, and a height of 3.6 mm, and the sapphire light transmission window plate 11a is thick.
- the length of the fluid passage 2b between the light incident portion 5a and the light detection portion 5b is set to 30 mm, and the inner diameter of the fluid passage is set to 4.0 mm ⁇ .
- the detection output from the photodiode 10 of the light incident portion 5a is input to the arithmetic device 19 via the reflected light detection device 18a, and the detection from the photodiode 10 of the light detection portion 5b.
- the output is input to the arithmetic device 19 via the output light detection device 18b.
- the concentration of the organic raw material TMGa vapor flowing in the fluid passage 2a is set at a predetermined time interval using the equation (1). Calculate and record and display the result.
- the detection output from the reflected light detection device 18a is used for correction of the raw material concentration detection value in the arithmetic device 19, whereby the so-called fluctuation of the incident light from the light source device 18 and the light transmission window plate 11a made of sapphire.
- the measurement error of the raw material concentration caused by the secular change of the light transmittance is corrected.
- the brittle destructible plate material (sapphire light transmissive window plate) ⁇ fixing structure ensures highly accurate concentration measurement while ensuring the required level of confidentiality without using any sealing material. It was confirmed that this was possible.
- the present invention provides not only a fluid concentration meter for a semiconductor manufacturing gas supply system, but also a fluid concentration meter, a conduit and a device in all fluid supply pipelines and fluid-using devices that handle precipitation, photoreactivity, and corrosive fluids. It can also be used for observing windows.
- 1 is a raw material fluid concentration detector 2 is a detector body 2a is a fluid passage 2b is a fluid passage 3 is an inlet block 3b is a joint portion 4 is an outlet block 4b is a joint portion 5a is a light incident portion 5b is a light detection portion 6 is a gasket type Seal 6a is a gasket 6b is a ring retainer 6c is a guide ring 7 is a leak inspection hole 8 is a fixing bolt 9 is an optical fiber 9a is an optical fiber insertion hole 10 is a photodiode 11 is a plate made of a brittle fracture material (light transmission window) Board) 11a is a light transmission window plate made of sapphire 12 is a holding and fixing body 12a is a flange housing portion 12b is a bolt insertion hole 12c is a stepped portion 13 is a sealing surface 14 is a first fixing flange 14a is a stepped portion 14b is an insertion recess 14c is an insertion recess Light transmission window plate support
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Abstract
Description
そのため、従前のこの種原料流体供給装置、例えば図9に示す如きバブリング型の原料流体供給装置においては、温度制御された原料タンク21の原料蒸気出口の近傍に光分析方式の濃度計22を設け、当該濃度計22からの濃度検出信号によって原料タンク21の温度、キャリアガスCGの流量、タンク内蒸気圧力Po等を調整することにより、反応炉23へ所定の原料濃度のプロセスガス24(例えば、タンク21内に貯留したトリメチルガリウムTMGa等の有機金属材料蒸気を含んだプロセスガス)が供給されて行く。
尚、図9において、25は熱式マスフローコントローラ、26はタンク内圧の圧力調整装置である。
又、後者の特開2004-108981号においては、図11に示すように、光学セル(吸光セル)を内蔵したインラインセンサー33を管路31へ固定し、前記光学セルを透過した光の光度測定を行なうようにしている。
その中でも、特に、シール材等を用いることなしに、センサー部の重要部を形成する光透過窓材を高気密性下に堅固に固定保持することを可能とした方策の提供が、緊急に要請されている。
、即ち、(I)シール材等を用いて光透過窓材等を固定保持した場合には、シール材自体からのパーティクルの放出や水分等の放出ガスにより流体純度が低下しやすいこと、(II)濃度計の構造の簡素化及び小型化並びに製品コストの引下げを容易に図れないこと、(III)光透過窓の透明度が変動するため、安定且つ高精度な原料流体濃度の測定が出来ないこと、及び、(IV)光学セルと管路との接続部の気密性能を高めることが困難なこと等の問題を解決するために、シール材を用いることなしにセンサー部を形成する脆性破壊性板材(光透過窓材)を高気密に固定保持する機構及びこれを用いた脆性破壊性板材から成る光透過窓板の固定方法を提供することを発明の主目的とするものであり、これにより、有機原料流体であっても流体通路内へ簡単にリークフリーで挿着固定することが出来る共に高精度で安定した濃度測定が行なえ、小型で安価に製造できるようにしたインライン型光分析式プロセス流体濃度計を提供せんとするものである。
また、本発明では、内周面が複数段による階段状に縮径した挿入凹部を有すると共に、挿入凹部内の段部を脆性破壊性板材から成る光透過窓板の支持面とした第一固定フランジと、前記第一固定フランジの挿入凹部の光透過窓板の支持面上に配置した脆性破壊性板材から成る光透過窓板と、前記第一固定フランジの挿入凹部内に階段状外周面を有する突出部を挿入して前記脆性破壊性板材から成る光透過窓板を挟んで前記挿入凹部へ気密に嵌合固定した第二固定フランジとから脆性破壊性板材から成る光透過窓板の固定構造を構成している。
その結果、脆性破壊性板材から成る光透過窓板の固定が簡単且つ確実に行えると共に、必要とするレベルの機密性を、シール材を用いることなしに容易に得ることが出来る。
図1は本発明に係る脆性破壊性板材の固定構造を適用した原料流体濃度検出器の正面図、図2はその平面図、図3は本発明に係る脆性破壊性板材の固定構造を適用した原料流体濃度検出器の光入射部の縦断面概要図、図4は光入射部の保持固定体の縦断面図及び平面図である。
尚、図3において、14は第一固定フランジ、16は第二固定フランジであり、当該両固定フランジ14,16により、後述するように本発明に係る脆性破壊性板材(光透過窓板)の固定構造が構成されている。
尚、原料濃度Cは、基本的には、分光光度計で求めた吸光度Aを基にして、次の(1)式により演算される。
A=log10(I0/I)=ε×C×I・・・(1)
但し、(1)式において、I0は光入射部5aからの入射光強度、Iは透過光強度(光検出部5bのフォトダイオード10への入射光強度)、εは原料のモル吸光係数、Cは原料濃度、Aは吸光度である。
そして、このサファイア製光透過窓板11aを挟み込みこんで一体化した第二固定フランジ16と第一固定フランジ14とを、保持固定体12のフランジ収容孔12a内へ挿入し、その後、保持固定体12を固定用ボルト8によりガスケット型シール6を介設して検出器の本体2へ押圧固定することにより、光入射部5a及び光検出部5bが検出器の本体2に気密に固定されている。
脆性破壊性板材(光透過窓板)の固定構造を構成する前記第二固定フランジ16は、図5に示すように、ステンレス鋼製の短い円柱体に形成されており、その一側(下面)の中央部は、2段の段部16aにより階段状に縮径された突出部16bに形成されている。
又、縮径された突出部16bの先端部の先端面16dは、厚さ0.8~1.5mm程度の薄い光透過窓板11aに当接するシール面になっている。尚、図5において、16cはフォトダイオード収納凹部である。
また、上記3段の段部14aの中間部は、光透過窓板11aの収納部を成しており、その中間部の段部である支持面14c上にサファイア製の光透過窓板11aが載置固定されている。
尚、第一固定フランジ14の下面側にはガスケット6aの収容部14dが形成されており、ここにガスケット型シール6の上半部が挿入固定される。
フランジ部を挟持することにより、両固定フランジ14,16の突出部16bの 外周面と挿入凹部14bの内周面との圧接面、及び光透過窓板11aの外周縁部に当接するが突出部16bの先端面16dと挿入凹部14bの光透過窓板支持面14cが夫々シール面となり、流体通路内の流体の外部への漏出が完全に防止される。w
同様に、8~12Nの挟持力により両固定フランジ14,16を一体化することにより、サファイア製光透過窓板11a(外径5~15mm)にひび割れ等の損傷が一切生じないことが確認されている。
先ず、図8に示すように、半導体製造装置用のプロセスガス(有機原料TMGa蒸気)の供給管路へ原料流体濃度検出器1をインライン状に接続し、光源装置18より光ファイバ9を通して光入射部5aへ光を入射した。尚、光入射部5a及び光検出部5bのフォトダイオード10は、受光面1.0mm×1.1mm、直径504mm、高さ3.6mmに選定されている、また、サファイア製光透過窓板11aは、厚さ1.0mm、直径8.0mm、であり、更に、光入射部5aと光検出部5b間の流体通路2bの長さは30mm、流体通路の内径は4.0mmΦに設定されている。
前記反射光検出装置18aからの検出出力は、演算装置19に於ける原料濃度検出値の補正に用いられ、これにより、光源装置18からの入射光の所謂揺らぎやサファイア製光透過窓板11aの光透過率の経年変化等により生ずる原料濃度の測定誤差が補正される。
2は検出器本体
2aは流体通路
2bは流体通路
3は入口ブロック
3bは継手部
4は出口ブロック
4bは継手部
5aは光入射部
5bは光検出部
6はガスケット型シール
6aはガスケット
6bはリング状リテイナー
6cはガイドリング
7は漏洩検査用孔
8は固定用ボルト
9は光ファイバ
9aは光ファイバ挿入孔
10はフォトダイオード
11は脆性破壊材料から成る板材(光透過窓板)
11aはサファイア製光透過窓板
12は保持固定体
12aはフランジ収納部
12bはボルト挿入孔
12cは段部
13はシール面
14は第一固定フランジ
14aは階段部
14bは挿入凹部
14cは挿入凹部の光透過窓板支持面(シール面)
14dはガスケット収容部
16は第二固定フランジ
16aは階段部
16bは突出部
16cはフォトダイオード収納凹部
16dは突出部の先端面(シール面)
17は凹部
17aはガスケット収容部
18は光源装置
18aは反射光検出装置
18bは出力光検出装置
19は演算装置
20は標準濃度計
Claims (7)
- 第一固定フランジと第二固定フランジの間に脆性破壊性板材から成る光透過窓板を挟着し、両固定フランジを気密に嵌合固定する構成とした脆性破壊性板材の固定構造。
- 内周面が複数段による階段状に縮径した挿入凹部を有すると共に、挿入凹部内の段部を脆性破壊性板材から成る光透過窓板の支持面とした第一固定フランジと、前記第一固定フランジの挿入凹部の光透過窓板の支持面上に配置した脆性破壊性板材から成る光透過窓板と、前記第一固定フランジの挿入凹部内に階段状外周面を有する突出部を挿入して前記脆性破壊性板材から成る光透過窓板を挟んで前記挿入凹部へ気密に嵌合固定した第二固定フランジと、を有する脆性破壊性板材の固定構造。
- 脆性破壊性板材から成る光透過窓板をサファイア製光透過窓板とすると共に、第一固定フランジと第二固定フランジとを6~12Nの加圧力により挟持する構成とした請求項2に記載の脆性破壊性板材の固定構造。
- 第二固定フランジの突出部の先端面と、第一固定フランジの挿入凹部の支持面を光透過窓板のシール面とした請求項2に記載の脆性破壊性板材の固定構造。
- 第一固定フランジの下面側にガスケット収容部を形成し、当該ガスケット収容部の底面をガスケットシール面とした請求項2に記載の脆性破壊性板材の固定構造。
- 第二固定フランジに光ファイバ挿入孔及びフォトダイオード収納凹部を設けた請求項2に記載の脆性破壊性板材の固定構造。
- 第一固定フランジと第二固定フランジの間に脆性破壊性板材から成る光透過窓板を挟着して両固定フランジを気密に嵌合固定すると共に、本体の表面に凹部を設けてその内部へガスケット型シールを装着し、次に、当該凹部内へ前記嵌合固定した両固定フランジを装着して第一固定フランジとガスケット型シールとを対向させ、更に、前記嵌合固定した両固定フランジを囲繞して保持固定体を配設し、当該保持固定体を本体へ固定することにより前記凹部内に嵌合固定した両固定フランジを、ガスケット型シールを介して気密に固定することを特徴とする脆性破壊性板材から成る光透過窓板の固定方法。
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CN201480010081.1A CN105164512B (zh) | 2013-05-09 | 2014-04-25 | 脆性破坏性板材的固定构造和使用该固定构造的由脆性破坏性板材构成的透光窗板的固定方法 |
SG11201509118YA SG11201509118YA (en) | 2013-05-09 | 2014-04-25 | Fastening structure for brittle-fracturable panel, and method for fastening light transmission window panel comprising brittle-fracturable panel employing same |
US14/889,388 US9983051B2 (en) | 2013-05-09 | 2014-04-25 | Fastening structure for brittle-fracturable panel, and method for fastening light transmission window panel comprising brittle-fracturable panel employing same |
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- 2014-04-25 US US14/889,388 patent/US9983051B2/en active Active
- 2014-04-25 KR KR1020157018579A patent/KR20150093235A/ko active Application Filing
- 2014-04-25 CN CN201480010081.1A patent/CN105164512B/zh not_active Expired - Fee Related
- 2014-04-25 KR KR1020177030347A patent/KR101852802B1/ko active IP Right Grant
- 2014-04-25 WO PCT/JP2014/002333 patent/WO2014181522A1/ja active Application Filing
- 2014-04-30 TW TW103115533A patent/TWI512279B/zh active
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Also Published As
Publication number | Publication date |
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CN105164512B (zh) | 2017-10-20 |
KR101852802B1 (ko) | 2018-04-27 |
JP2014219294A (ja) | 2014-11-20 |
TW201512643A (zh) | 2015-04-01 |
SG11201509118YA (en) | 2015-12-30 |
KR20170120213A (ko) | 2017-10-30 |
CN105164512A (zh) | 2015-12-16 |
KR20150093235A (ko) | 2015-08-17 |
US20160084700A1 (en) | 2016-03-24 |
TWI512279B (zh) | 2015-12-11 |
JP5885699B2 (ja) | 2016-03-15 |
US9983051B2 (en) | 2018-05-29 |
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