WO2006068260A1 - 半導体ウエハ縦型熱処理装置用磁性流体シールユニット - Google Patents
半導体ウエハ縦型熱処理装置用磁性流体シールユニット Download PDFInfo
- Publication number
- WO2006068260A1 WO2006068260A1 PCT/JP2005/023693 JP2005023693W WO2006068260A1 WO 2006068260 A1 WO2006068260 A1 WO 2006068260A1 JP 2005023693 W JP2005023693 W JP 2005023693W WO 2006068260 A1 WO2006068260 A1 WO 2006068260A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnetic fluid
- fluid seal
- unit
- shaft
- reaction vessel
- Prior art date
Links
- 239000011553 magnetic fluid Substances 0.000 title claims abstract description 88
- 238000007789 sealing Methods 0.000 title abstract 4
- 239000004065 semiconductor Substances 0.000 title description 9
- 238000010926 purge Methods 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims description 63
- 238000010438 heat treatment Methods 0.000 claims description 20
- 239000000758 substrate Substances 0.000 claims description 7
- 210000003027 ear inner Anatomy 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000036316 preload Effects 0.000 claims description 2
- 239000011554 ferrofluid Substances 0.000 claims 2
- 239000007789 gas Substances 0.000 description 44
- 235000012431 wafers Nutrition 0.000 description 18
- 239000006227 byproduct Substances 0.000 description 15
- 239000002245 particle Substances 0.000 description 12
- 238000011109 contamination Methods 0.000 description 9
- 238000001816 cooling Methods 0.000 description 9
- 230000006866 deterioration Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 6
- 239000012495 reaction gas Substances 0.000 description 5
- -1 etc.) Substances 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- 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
- C23C16/4401—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber
- C23C16/4409—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber characterised by sealing means
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/324—Thermal treatment for modifying the properties of semiconductor bodies, e.g. annealing, sintering
-
- 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
- H01L21/67126—Apparatus for sealing, encapsulating, glassing, decapsulating or the like
Definitions
- a plurality of substrates to be processed are held by a holder at a predetermined interval in the vertical direction, and the reaction container is rotated while rotating the holder in a high-temperature reaction container of slight preload or vacuum.
- the present invention relates to a magnetic fluid seal unit incorporated in a vertical heat treatment apparatus configured to perform heat treatment on a substrate to be processed.
- This type of vertical heat treatment apparatus is used for semiconductor wafer film formation, oxidation treatment, annealing treatment, impurity diffusion treatment, and the like.
- a wafer boat holding semiconductor wafers at regular intervals in the vertical direction is accommodated in the reaction vessel from below, and then the lower end opening of the reaction vessel is covered with the bottom lid. It is configured to be sealed by the body.
- the holder is rotationally driven in the reaction vessel in order to uniformly heat the semiconductor wafer.
- a magnetic fluid seal unit is incorporated at the bottom of the reaction vessel.
- the magnetic fluid seal unit has a bearing that rotatably supports a rotating shaft that penetrates the bottom lid of the reaction vessel, and a leak that prevents the reaction gas supplied into the reaction vessel from leaking.
- the unit has a built-in seal to prevent outside air from entering.
- the unit main body is formed in a cylindrical shape, and is attached to the bottom lid so that the hollow portion communicates with the shaft hole of the bottom lid of the reaction vessel.
- the bearing is built in the lower part of the unit body and supports the rotating shaft.
- the seal part is generally built in the upper part of the unit body, and seals the gap between the unit body and the rotating shaft. In this seal part Magnetic fluid is used. The reason why the magnetic fluid seal is provided in the upper part of the unit body is that the contamination generated from the bearing does not enter the reaction vessel and that the reaction gas and reaction byproducts used in the heat treatment This is in order not to impair the function.
- the reactive gas and reaction by-product gas supplied into the reaction vessel contact the magnetic fluid in the seal portion through the shaft hole.
- reaction by-products are generated, which adhere to the magnetic fluid, the surface of the rotating shaft, and the surface of the shaft hole of the unit body.
- magnetic by-products, reaction by-products adhering to the surface of the rotating shaft, and the surface of the shaft hole of the unit body cause particles.
- the seal part provided in the upper part of the unit main body is close to the bottom cover body of a high temperature reaction container, it is easy to receive high heat, and it is necessary to prevent deterioration of magnetic fluid by this.
- a water cooling part is provided inside the unit body on the outer periphery of the seal part for cooling. Cooling not only lowers the temperature of the magnetic fluid but also the surrounding temperature, so it promotes adhesion of reaction byproducts and induces the generation of particles.
- an outer shell member 1 0 1 is attached to the lower end of the rotary shaft 1 100, A structure in which a seal portion 10 3 (magnetic fluid seal portion) and a bearing portion 10 4 are arranged outside the main body 10 2 (fixing member) to separate them from the bottom lid 10 5 of the reaction vessel Is adopted. Further, a gas supply path 10 06 for supplying purge gas to a gap between the rotating shaft 100 and the unit body 10 2 is provided on the bottom cover body 10 5 side of the reaction vessel with respect to the seal portion 10 3. This prevents the reaction gas and reaction by-product gas from the reaction vessel from coming into contact with the seal portion 103.
- the magnetic fluid seal unit is constructed as in the prior art shown in FIG.
- the purge gas supply part by the gas supply path 10 6 is separated from the seal part. Therefore, a gas flow is formed in the gap A from the purge gas supply part 10 6 to the magnetic fluid seal part 10 3.
- Contamination, impure gas (water vapor, reaction by-product gas, etc.), particles, etc. are likely to stay and contaminate the semiconductor wafer being heat-treated for some reason and entering the reaction vessel. In the long term, it may cause deterioration of the magnetic fluid.
- the bearing section 10 4 is located near the bottom cover 10 5 of the reaction vessel where the temperature is high, it is easily affected by high heat, and the bearing performance may be deteriorated or the function may be stopped. There is a possibility that a cooling part must be provided above the part. And this has the possibility of inducing the generation of the above-mentioned particles.
- the present invention has been made in view of the above-described circumstances, and a retention portion in which contamination, impure gas (water vapor, reaction by-product gas, etc.), particles, and the like are retained between the unit main body and the rotating shaft. Eliminates cooling by water cooling and eliminates air cooling and the corresponding structure. Adsorption of high heat and impure gas, deterioration of magnetic fluid due to adhesion of reaction byproducts, generation of particles, high temperature bearing The purpose is to suppress performance degradation, function stop, and generation of particles. Disclosure of the invention
- a plurality of substrates to be processed are held at a certain interval in the vertical direction by a holding tool, and the holding tool is rotated in a reaction container having a high pre-pressure or vacuum temperature.
- a magnetic fluid seal unit incorporated in a vertical heat treatment apparatus configured to perform heat treatment on a substrate to be processed,
- a rotating shaft that enters the reaction vessel through a shaft hole formed in the bottom of the reaction vessel and transmits a rotational driving force to the holder;
- a cylindrical unit body that is mounted on the outside of the bottom of the reaction vessel, has a support hole communicating with the shaft hole, and the rotation shaft is inserted into the support hole;
- An outer shell member that is fixed to the lower end of the rotating shaft and goes around from the lower part of the unit body to the outer periphery; a magnetic fluid seal portion that seals a gap between the rotating shaft and the unit body using a magnetic fluid;
- a bearing provided at the lower end of the unit body between the unit body and the outer shell member
- the magnetic fluid seal portion is incorporated in a lower position of the unit body that reduces the influence of heat.
- a heat radiating means is formed in the unit main body between the portion attached to the bottom of the reaction vessel and the portion where the magnetic fluid seal portion is incorporated.
- the heat dissipating means can be configured to have a minimum necessary cross-sectional area in which the cross-sectional area of the unit body is smaller than the part where the magnetic fluid seal portion is incorporated. This minimizes heat conduction.
- the heat dissipating means can also be composed of heat dissipating fins formed on the outer surface of the unit body.
- the rotating shaft has a hollow portion formed on the central axis over a certain length from the lower end, and a heat conducting shaft formed of a material having a higher thermal conductivity than the rotating shaft is inscribed in the hollow portion. It is preferable to have a built-in configuration.
- the heat conduction axis has a function of forming a probe for efficiently conducting heat, and is inscribed at an arbitrary position on the inner wall of the hollow portion in consideration of the intended heat conduction efficiency. Is preferred.
- the heat conduction axis is movable in the axial direction.
- a pair or a plurality of concentric labyrinths having the same center as that of the rotating shaft between the rotating shaft and the unit main body at a position near the shaft hole formed at the bottom of the reaction vessel. Is preferably formed. As a result, a uniform gas purge can be performed around the rotating shaft, and a gas retention portion can be eliminated.
- the purge gas is uniformly supplied from the gas supply unit to the gap between the rotary shaft and the unit body at a position near the magnetic fluid seal unit.
- the purge gas is uniformly supplied from the gas supply unit to the gap between the rotary shaft and the unit body at a position near the magnetic fluid seal unit.
- impure gas water vapor, reaction by-product gas, etc.
- particles, etc. between the fluid seal and contamination of the heat-treated wafer or deterioration of the magnetic fluid over the long term. No fear.
- water cooling since water cooling is not used, supercooling is eliminated and adhesion of reaction byproducts can be prevented, and generation of particles can be suppressed.
- the heat conduction shaft that can be installed in the hollow portion of the rotating shaft extends the heat treatment temperature range in which the magnetic fluid seal can be set to the optimum temperature for different heat treatment temperatures, and can suppress deterioration of the magnetic fluid due to high heat.
- FIG. 1 is a diagram showing a configuration example of a vertical heat treatment apparatus in which a magnetic fluid seal unit according to an embodiment of the present invention is incorporated.
- FIG. 2 is a front sectional view showing a configuration example of the magnetic fluid seal unit according to the embodiment of the present invention.
- FIG. 3 is a front sectional view showing another configuration example of the magnetic fluid seal unit according to the embodiment of the present invention.
- FIG. 4 is a front sectional view showing still another configuration example of the magnetic fluid seal unit according to the embodiment of the present invention.
- FIG. 5 is a front sectional view showing a configuration example of a conventional magnetic fluid seal unit.
- BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment according to the present invention will be described with reference to the drawings.
- FIG. 1 is a diagram showing a configuration example of a vertical heat treatment apparatus in which a magnetic fluid seal unit according to an embodiment of the present invention is incorporated.
- the bottom of the reaction vessel 1 is open, and the bottom opening is closed by the bottom lid 2.
- this bottom lid 2 also forms part of the reaction vessel 1.
- the bottom cover 2 can be moved up and down, and a shaft hole 2 a is formed at the center thereof.
- the upper part of the rotary shaft 20 protrudes to the upper surface side through the shaft hole 2 a.
- a turntable 3 is mounted on the upper end of the rotary shaft 20, and a wafer boat 5 (holding tool) is placed on the upper surface of the turntable 3 via a heat insulating cylinder 4.
- the wafer boat 5 is a member that holds the semiconductor wafers W (substrates to be processed) at regular intervals in the vertical direction.
- the turntable 3, the heat insulating cylinder 4 and the wafer boat 5 are also moved up and down together with the bottom cover 2.
- the reaction vessel 1 has an exhaust pipe 6 and a gas supply pipe 7 communicating with each other.
- the reaction vessel 1 is evacuated through the exhaust pipe 6 and then the reaction gas is supplied from the gas supply pipe 7 into the reaction vessel 1. Is done.
- a heating furnace 8 is disposed on the outer periphery of the reaction vessel 1, and the semiconductor wafer W held in the wafer port 5 is heated and heat-treated by the radiant heat from the heating furnace 8.
- a magnetic fluid seal unit 10 according to this embodiment is attached to the bottom lid 2.
- FIGS. 2 to 4 are front sectional views showing the configuration of the magnetic fluid seal unit according to the present embodiment.
- the magnetic fluid seal unit 10 includes the rotary shaft 20 described above, the unit main body 30, the magnetic fluid seal portion 40, the gas supply path 50, the outer shell member 60, and the bearing portion 70.
- main The main part is configured.
- the unit body 30 is made of a non-magnetic material, and a support hole 31 through which the rotary shaft 20 is inserted is formed in the center shaft portion so as to penetrate vertically. Further, a flange 32 is formed at the upper end of the unit body 30, and this flange 32 constitutes a mounting portion for the bottom lid 2. The flange 3 2 is attached to the lower surface of the bottom lid 2 with a fastener such as Porto.
- a concave groove 2 b is formed around the lower surface of the bottom lid 2 around the shaft hole 2 a, while a convex portion that fits into the concave groove 2 b is formed on the upper surface of the flange 3 2.
- 3 2 a is formed.
- An O-ring 33 is provided at the step between the groove 2 b and the convex 3 2 a, and the fitting portion is hermetically sealed by the O-ring 33.
- the protrusion 3 2 a of the flange 3 2 has a notch 3 2 b formed continuously from the support hole 3 1 at the center of the upper surface, and the bottom surface of the notch 3 2 b has a concentric upward shape. Multiple ridges are formed.
- a disk member 3 4 is attached to a portion of the outer periphery of the rotary shaft 20 facing the notch 3 2 b, and a plurality of downward protrusions are formed concentrically on the lower surface of the disk member 3 4. It is. These ridges mesh with each other, forming a zigzag labyrinth 35 between them.
- a slight gap is formed between the upper surface of the disk member 3 4 mounted on the outer periphery of the rotary shaft 20 and the ceiling surface of the concave groove 2 b formed in the bottom lid 2. This gap communicates with the gap between the shaft hole 2a and the rotary shaft 20. Further, the gap between the disk member 3 4 and the bottom cover 2 communicates with the outer opening of the labyrinth 35, and the inner opening of the labyrinth 35 is formed below the disk member 3 4.
- the flange 3 2 communicates with the gap between the body and the rotary shaft 20.
- a magnetic fluid seal portion 40 is provided along the support hole 31 at the lower position of the unit body 30.
- the magnetic fluid seal portion 40 is filled in a gap between the cylindrical pole piece 41 attached to the unit body 30 and the inner peripheral surface of the pole piece 41 and the outer peripheral surface of the rotary shaft 20.
- the magnetic fluid is composed of 4 and 2.
- the pole piece 4 1 has a permanent magnet 4 3 incorporated therein.
- the rotating shaft 20 is made of a magnetic metal. For this reason, a magnetic circuit is formed between the permanent magnet 4 3 incorporated in the pole piece 41 and the rotating shaft 20 via the magnetic fluid 42, and the magnetic fluid 4 has a magnetic force acting on the magnetic circuit. 2 is held in the gap.
- the gas supply path 50 is closer to the reaction vessel 1 than the magnetic fluid seal portion 40 and in the vicinity of the magnetic fluid seal portion 40, and is between the rotary shaft 20 and the unit body 30.
- a purge gas such as nitrogen gas is supplied to the gap from this portion.
- a group 51 having a larger volume than the other gaps is formed in the gap where the purge gas is supplied from the gas supply path 50.
- the group 51 can be formed by providing concave stripes on the inner wall of the unit body 30 or the outer periphery of the rotary shaft 20.
- the outer shell member 60 is formed into a shallow bottomed cylindrical shape (a bowl shape), the center portion is fixed to the lower end of the rotating shaft 20, and rotates integrally with the rotating shaft 20.
- the inner bottom surface of the outer shell member 60 faces the bottom surface of the unit body 30, and the inner side surface of the outer shell member 60 faces the outer peripheral surface of the unit body 30. That is, the outer shell member 60 is arranged so as to go around from the lower side of the unit main body 30 to the outer periphery. Between the inner surface of the outer shell member 60 and the outer peripheral surface of the unit main body 3 ⁇ , a bearing portion 70 made of ball bearing or the like is provided.
- a driven gear 80 is fixed to the outer peripheral surface of the outer shell member 60, and meshes with the drive gear 8 2 mounted on the drive shaft of the drive motor 8 1 to rotate the rotational drive force from the drive motor 8 1.
- Each gear constitutes a speed reduction mechanism.
- the unit body 30 has an intermediate part sandwiched between the flange 3 2 which is the attachment part to the bottom lid 2 of the reaction vessel 1 and the magnetic fluid seal part 40 and the magnetic fluid seal part 40.
- the small-diameter portion 36 has a smaller cross-sectional area than the portion. Furthermore, this small diameter part
- the outer surface of 36 is formed with heat dissipating fins 37 to ensure a large surface area.
- the rotary shaft 20 has a hollow portion 21 formed on the center axis from the lower end over a certain length.
- the heat conduction shaft 2 2 is detachable in the hollow portion 21.
- a female screw is formed on the inner wall of the hollow portion 21, and a male screw is formed on the outer peripheral surface of the heat conduction shaft 22, and the heat conduction shaft 22 is formed by screwing the female screw and the male screw. Can be moved to any position.
- the heat conduction axis 22 is formed of a material having a higher thermal conductivity than the rotation axis 20.
- the heat conduction shaft 22 can be made of aluminum alloy or copper alloy.
- the magnetic fluid seal part 40 is provided at the lower position of the unit body 30 that is remote from the reaction vessel 1, so that the rotary shaft 20 is passed through the reaction vessel 1. There is little influence of transmitted heat.
- the small diameter portion 36 of the unit body 30 having a small cross-sectional area is interposed between the reaction vessel 1 and the magnetic fluid seal portion 40, the amount of heat conduction is reduced here.
- the heat dissipating fins 37 are formed on the outer surface of the small diameter portion 36, it is difficult for heat to be transmitted to the magnetic fluid seal portion 40 as heat is dissipated to the atmosphere. By providing such heat radiation means, it is possible to suppress deterioration of the magnetic fluid 42 filled in the magnetic fluid seal portion 40 due to heat.
- a hollow portion 21 is formed in the central shaft portion of the rotary shaft 20, and the temperature of the magnetic fluid seal portion 40 is reduced by making the heat conduction shaft 22 2 detachable from the hollow portion 21. Can be adjusted by the position of the heat conduction axis 22. Since the outer periphery of the rotary shaft 20 is close to the atmosphere via the unit body 30, heat is easily cooled, while the central shaft portion of the rotary shaft 20 is hot. For this reason, the amount of heat transmitted through the rotary shaft 20 is large at the central shaft portion. By forming the hollow portion 21 in the central shaft portion, it becomes possible to further delay heat conduction.
- the magnetic fluid 42 in the magnetic fluid seal part 40 is raised to an appropriate temperature, so that the heat in the reaction vessel 1 must be positively transferred to the magnetic fluid seal part 40. May occur. In this case, for example, as shown in FIG. If 2 is inserted into the hollow portion 21, heat can be quickly transferred to the magnetic fluid seal portion 40 via the heat conduction shaft 22.
- the amount of heat transfer can be adjusted somewhat depending on the diameter of the heat conducting shaft 22 and the length and position of insertion into the hollow portion 21. If you want to lower the temperature of the magnetic fluid seal, place the tip of the heat transfer shaft 2 2 slightly above the vicinity of the upper end of the magnetic fluid seal, for example, as shown in Figure 3, and the base end is the lower end of the rotating shaft. By projecting more outward, and forming the radiation fins 22a at the projecting portions, heat can be efficiently dissipated to the atmosphere, and the temperature of the magnetic fluid seal portion 40 can be lowered.
- a male screw portion 2 2 b is formed only at the distal end portion of the heat conduction shaft 22, and this distal end portion is inscribed in the hollow portion inner wall of the rotary shaft 20, and the base end is
- the structure that protrudes to the outside from the lower end surface of the rotating shaft and the heat radiation fins 2 2 a are formed at the projected portions can also efficiently dissipate heat to the atmosphere, and the temperature of the magnetic fluid seal 40 can be lowered.
- the intermediate portion of the heat conduction shaft 22 has a small diameter and is not inscribed in the hollow portion inner wall of the rotating shaft 20.
- the purge gas supplied from the gas supply path 50 reaches the shaft hole 2 a of the bottom lid 2 through the labyrinth 35 through the gap between the unit body 30 and the rotary shaft 20, and the shaft hole 2 a Are fed into the reaction vessel 1. Therefore, the reaction gas filling the reaction vessel 1 leaks from the shaft hole 2a.
- the purge gas supply section is provided close to the magnetic fluid seal section 40, contamination, impure gas (water vapor, reaction by-product gas, between the purge gas supply section and the magnetic fluid section 40, Others), there is no possibility of particles or the like remaining, and there is no risk of contamination of the heat-treated wafer and deterioration of the magnetic fluid over the long term.
- the purge gas is uniformly supplied from the gas supply unit to the gap between the rotary shaft and the unit body at a position near the magnetic fluid seal unit.
- the purge gas is uniformly supplied from the gas supply unit to the gap between the rotary shaft and the unit body at a position near the magnetic fluid seal unit.
- impure gas water vapor, reaction by-product gas, etc.
- particles, etc. between the fluid seal and contamination of the heat-treated wafer or deterioration of the magnetic fluid over the long term. No fear.
- water cooling since water cooling is not used, supercooling is eliminated and adhesion of reaction byproducts can be prevented, and generation of particles can be suppressed.
- the heat conduction shaft that can be installed in the hollow portion of the rotating shaft extends the heat treatment temperature range in which the magnetic fluid seal can be set to the optimum temperature for different heat treatment temperatures, and can suppress deterioration of the magnetic fluid due to high heat.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Chemical Vapour Deposition (AREA)
- Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05820274A EP1830396A4 (en) | 2004-12-21 | 2005-12-19 | MAGNETIC FLUID SEALING UNIT FOR VERTICAL THERMAL PROCESSING APPARATUS OF SEMICONDUCTOR FLOOR |
US11/793,636 US20080036155A1 (en) | 2004-12-21 | 2005-12-19 | Ferrofluid Seal Unit Used on Vertical Thermal Processing Furnace System for Semiconductor Wafer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004370014A JP2006179613A (ja) | 2004-12-21 | 2004-12-21 | 半導体ウエハ縦型熱処理装置用磁性流体シールユニット |
JP2004-370014 | 2004-12-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006068260A1 true WO2006068260A1 (ja) | 2006-06-29 |
Family
ID=36601855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/023693 WO2006068260A1 (ja) | 2004-12-21 | 2005-12-19 | 半導体ウエハ縦型熱処理装置用磁性流体シールユニット |
Country Status (6)
Country | Link |
---|---|
US (1) | US20080036155A1 (ja) |
EP (1) | EP1830396A4 (ja) |
JP (1) | JP2006179613A (ja) |
KR (1) | KR20070091206A (ja) |
CN (1) | CN101084571A (ja) |
WO (1) | WO2006068260A1 (ja) |
Cited By (1)
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US20090165721A1 (en) * | 2007-12-27 | 2009-07-02 | Memc Electronic Materials, Inc. | Susceptor with Support Bosses |
CN101983299B (zh) * | 2008-04-03 | 2013-03-20 | 伊格尔工业股份有限公司 | 旋转接头 |
JP5131094B2 (ja) * | 2008-08-29 | 2013-01-30 | 東京エレクトロン株式会社 | 熱処理装置及び熱処理方法並びに記憶媒体 |
JP5276388B2 (ja) | 2008-09-04 | 2013-08-28 | 東京エレクトロン株式会社 | 成膜装置及び基板処理装置 |
JP5134495B2 (ja) | 2008-10-16 | 2013-01-30 | 東京エレクトロン株式会社 | 処理装置及び処理方法 |
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Also Published As
Publication number | Publication date |
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KR20070091206A (ko) | 2007-09-07 |
JP2006179613A (ja) | 2006-07-06 |
EP1830396A1 (en) | 2007-09-05 |
CN101084571A (zh) | 2007-12-05 |
EP1830396A4 (en) | 2010-08-04 |
US20080036155A1 (en) | 2008-02-14 |
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