WO2010027073A1 - 半導体製造装置用部品及び半導体製造装置 - Google Patents
半導体製造装置用部品及び半導体製造装置 Download PDFInfo
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- WO2010027073A1 WO2010027073A1 PCT/JP2009/065589 JP2009065589W WO2010027073A1 WO 2010027073 A1 WO2010027073 A1 WO 2010027073A1 JP 2009065589 W JP2009065589 W JP 2009065589W WO 2010027073 A1 WO2010027073 A1 WO 2010027073A1
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- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 15
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Images
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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
Definitions
- the present invention relates to a component for a semiconductor manufacturing apparatus, a component for manufacturing a compound semiconductor, a semiconductor manufacturing apparatus, and a compound semiconductor manufacturing apparatus suitable for an apparatus for forming fine wiring using plasma discharge, such as a plasma etching apparatus, a plasma CVD apparatus, and a sputtering apparatus.
- a plasma etching apparatus such as a plasma etching apparatus, a plasma CVD apparatus, and a sputtering apparatus.
- Fine wiring in semiconductor device manufacturing and compound semiconductor device manufacturing is formed by using film formation by a sputtering apparatus or CVD apparatus and isotropic etching and anisotropic etching techniques by an etching apparatus.
- plasma discharge is used for improving the film forming speed and etching property.
- a plasma etching apparatus will be described as a typical example of a semiconductor manufacturing apparatus using plasma discharge.
- a method is known in which plasma gas is used for fine etching of Si and dry etching processes of various thin films such as an insulating film, an electrode film, and a wiring film formed on a substrate.
- a fluorine (F) system or a chlorine (Cl) system that is a gas between an upper electrode disposed in a chamber of a dry etching apparatus and a substrate mounted on a lower electrode surface disposed opposite to the upper electrode.
- Plasma gas is discharged between the electrodes to generate fluorine or chlorine plasma, and the thin film formed on the substrate is dry etched with active ions or radicals generated in the plasma.
- the method to be applied is applied.
- the product formed by etching from the thin film on the substrate by dry etching using fluorine-based or chlorine-based plasma becomes a gas state and is discharged from the chamber to the outside by the exhaust pump.
- a gas different from the fluorine-based or chlorine-based plasma gas used for the dry etching is used for the purpose of removing the adhesion film.
- a process is employed in which dry etching is performed under conditions to discharge a product adhered in the chamber out of the chamber.
- a thermal spray coating made of yttrium oxide (Y 2 O 3 ) or aluminum oxide (Al 2 O 3 ) having high plasma resistance and corrosion resistance is formed on the parts irradiated with plasma.
- yttrium oxide or aluminum oxide is used to suppress generation of products and prevent damage due to plasma attack.
- the coating of yttrium oxide or aluminum oxide formed by thermal spraying is formed by depositing raw material powder of yttrium oxide or aluminum oxide in a molten state, so that the molten particles are rapidly solidified by a plasma heat source and adhered. At this time, a large number of microcracks are generated in the particles deposited in a flat state, and further, a strain formed by rapid solidification remains in each flat particle, and a coating is formed.
- an active radical generated by plasma discharge is irradiated to an yttrium oxide film or an aluminum oxide film in such a state, the active radical attacks the microcrack to develop the crack, There is a problem in that cracks propagate and the sprayed coating is lost to cause generation of particles.
- the yttrium oxide film or aluminum oxide formed by the thermal spraying process is a deposited film of particles in the molten state, and therefore tends to be a source of particles and causes a reduction in product yield.
- the formation tends to cause problems (see Patent Document 1).
- the sprayed coating is deposited on the surface that has been subjected to a blasting process in which abrasive grains and the like are sprayed onto the substrate surface together with a high-pressure fluid. Residual pieces of material (abrasive grains) may exist, or a crushed layer may be formed by blasting on the part surface. Since the sprayed coating is deposited on the surface of the component as described above, the thermal film stress due to the temperature change caused by the plasma discharge causes the stress to act on the interface between the component and the sprayed coating, and the film is easily peeled off together with the sprayed coating.
- the present invention is capable of stably and effectively suppressing the generation of fine dust generated from parts, and for semiconductor manufacturing equipment parts and compound semiconductor manufacturing equipment capable of preventing contamination by impurities from the parts.
- An object is to provide a component and semiconductor manufacturing apparatus and a compound semiconductor manufacturing apparatus.
- the particle size of the oxide powder as the supply powder is as large as about 10 to 45 ⁇ m, a maximum of about 15% of voids are generated in the formed sprayed coating, and the surface of the sprayed surface is rough.
- the average roughness Ra is about 6 to 10 ⁇ m.
- the wiring width is being reduced (for example, 0.18 ⁇ m, 0.13 ⁇ m, and further 0.09 ⁇ m or less).
- the wiring width is being reduced (for example, 0.18 ⁇ m, 0.13 ⁇ m, and further 0.09 ⁇ m or less).
- extremely fine particles micro particles having a diameter of about 0.2 ⁇ m are mixed, for example, wiring defects and element defects are caused. It is strongly desired to further suppress the generation of fine particles due to the device components.
- the present invention has been made to cope with such problems, and aluminum nitride (AlN) having plasma resistance and corrosion resistance more than yttrium oxide and aluminum oxide is applied to parts for semiconductor manufacturing equipment and compound semiconductor manufacturing equipment.
- AlN powder is deposited without causing internal defects, and it is possible to stably and effectively prevent peeling of products and deposited films adhering during etching and film-forming processes, and to perform frequent device cleaning, parts replacement, etc.
- Reduces productivity and increases the cost of etching and film formation, and suppresses the generation of fine particles, as well as parts for semiconductor manufacturing equipment and compound semiconductor manufacturing equipment, and particles into the substrate Suppresses contamination and contamination of impurities, and supports high-integrated semiconductor devices, etc.
- its object is to provide a semiconductor manufacturing apparatus and producing a compound semiconductor device that allows to achieve such reduction in the etching and deposition costs through.
- the nitride sprayed coating deposited without melting the supply powder at the time of thermal spraying as in the present invention it is possible to reduce surface defects because molten particles are hardly generated. At the same time, it is possible to increase the density of the thermal spray coating and smooth the surface, thereby reducing internal defects. Furthermore, since the stability of the crystal structure of the nitride constituting the thermal spray coating is increased, the chemical stability of the thermal spray coating can be improved.
- the plasma resistance of the parts can be improved, and the amount of particles generated and impurity contamination
- the amount can be reduced, and the number of device cleaning and parts replacement can be greatly reduced.
- Reduction of the amount of generated particles greatly contributes to the improvement of the yield of various thin films processed by the semiconductor manufacturing apparatus and the compound semiconductor manufacturing apparatus, as well as elements and parts using the thin films.
- the reduction in the number of device cleanings and part replacements greatly contributes to the improvement of productivity and the reduction of etching costs and film formation costs.
- a component for a semiconductor manufacturing apparatus and a component for a compound semiconductor manufacturing apparatus according to the present invention include a component main body and a thermal spray coating integrally formed on the surface of the component main body by spraying nitride particles.
- the thermal spray coating is formed by depositing 90% by mass or more of nitride powder particles in an unmelted state.
- a semiconductor manufacturing apparatus and a compound semiconductor manufacturing apparatus according to the present invention are characterized by including a component for a semiconductor manufacturing apparatus and a component for a compound semiconductor manufacturing apparatus each having the thermal spray coating.
- generation of fine particles generated from a component is stably and effectively suppressed, and it is possible to suppress a decrease in productivity and an increase in component cost due to frequent device cleaning and component replacement. It can also be applied to the manufacture of highly integrated semiconductor devices, and it can be used for semiconductor manufacturing equipment parts and compound semiconductor manufacturing equipment parts that can reduce the cost of etching and film formation by improving the operating rate.
- a semiconductor manufacturing apparatus or a compound semiconductor manufacturing apparatus can be provided.
- SYMBOLS 1 ... Supply powder, 2 ... Heat source, 3 ... Heating medium, 4 ... Molten particle, 5 ... Acceleration gas, 6 ... Spraying torch, 7 ... Base material, 8a ... Flat particle, 9 ... Crevice, 10 ... Processing chamber, 11 ... Discharge tube, 12 ... Gas supply port, 13 ... Exhaust port, 14 ... Sample stage, 15 ... High frequency power supply, 16 ... Waveguide, 17 ... Solenoid coil, 18 ... Magnetron, 19 ... Wafer, 20 ... Thermal spray coating.
- nitride film having plasma resistance and corrosion resistance For the purpose of reducing the number of exchange of particles and parts in the plasma etching apparatus, it is effective to form a nitride film having plasma resistance and corrosion resistance on the parts irradiated with active radicals by plasma.
- the nitride having plasma resistance and corrosion resistance include aluminum nitride (AlN), boron nitride (BN), silicon nitride (Si 3 N 4 ), and the like.
- the composite nitride include Al—BN.
- the present invention exhibits a predetermined effect because it has a coating structure in which nitride powder particles are unmelted and deposited by 90 mass% or more.
- a coating 8 formed by a thermal spraying method melts a raw material such as powder (feed powder 1) using electricity or combustion gas as a heat source 2, and melts the molten particles 4 into Ar gas or compressed air. It is formed by a method of spraying and spraying from the spraying torch 6 using an acceleration gas 5 such as. Therefore, when the molten particles 4 are deposited on the coating (base material 7), as shown in FIG. 1, the molten particles 4 are flattened by collision energy to become flat particles 8a, and this flat particle 8a is deposited. (Lamellar structure) is obtained. As shown in FIG. 2, the flat particles 8a described here have a ratio (X / Y) of 2.5 (X) to (Y) in the film thickness direction of the thermal spray coating 8 of 2.5 or more. Defined as particle.
- the particles colliding when the molten particles 4 are deposited are scattered and adhered as the scattered particles 21, so that they are scattered on the flat particles 8a.
- the surface morphology is such that the particles 21 are deposited in an unstable manner.
- an adhesion film is deposited on the part according to the form of thermal spraying. The form is easy to occur.
- the flattened molten particles are rapidly cooled and solidified, so that the microcracks 22 are generated in the flat particles 8a as shown in FIGS.
- the crater 23 is generated.
- the thermal spray material when oxide ceramics is used as the thermal spray material, the occurrence of cracks becomes significant. Therefore, when such a sprayed coating is used in a semiconductor manufacturing apparatus and a compound semiconductor manufacturing apparatus, the cracks 21 of the flat particles 8a develop due to the thermal stress caused by the plasma, and the strength of the sprayed coating 8 decreases, and the adhered film is formed. The problem that the crack 21 propagates and causes film peeling occurs. Furthermore, since the sprayed coating is formed in a molten state, when the composite oxide is used as the raw material powder, the composite oxide is separated and deposited due to the difference in melting point, and the material characteristics of the composite oxide cannot be obtained. There also arises a problem that the plasma resistance and corrosion resistance are lost.
- thermal spraying equipment has realized that a film is formed by continuously depositing on a substrate without melting the material. Specifically, this is realized by changing the shape of the combustion chamber, making the nozzle pores, and adding an auxiliary combustion mechanism. Since it has become possible to deposit particles in an unmelted state, it has been impossible to form a film with a nitride that has been melted and sublimated by the thermal spraying method so far, but the nitride particles are in an unmelted state. Therefore, a nitride film can be formed.
- the aluminum nitride film obtained by this equipment forms a film in a form in which fine particles 24 are bonded, and has a film structure in which unmelted particles are deposited. It exhibits a surface morphology free from surface defects such as cracks, craters and scattered particles as found in the sprayed film.
- a nitride spray coating deposited without melting the supply powder during thermal spraying it is used in semiconductor manufacturing equipment and compound semiconductor manufacturing equipment such as plasma etching equipment, plasma CVD equipment and sputtering equipment using plasma discharge. It was found that the plasma resistance of the parts can be significantly improved, the particle can be reduced, the impurity contamination can be reduced, and the life of the parts can be extended.
- the component for semiconductor manufacturing apparatus and the component for compound semiconductor manufacturing apparatus in the present invention have a sprayed coating of nitride particles on the surface of the component main body, and the nitride powder particles are unmelted and deposited by 90 mass% or more for thermal spraying. It is characterized by forming a film.
- the nitride particles preferably maintain the crystal structure of the raw material powder. For this reason, the thermal spray coating of the present invention has high chemical stability, and even when composite nitride particles are used, the material characteristics of the raw material powder can be obtained without separation due to the difference in melting point.
- the sprayed coating has a fine particle deposition structure, the gaps 9 between the deposited particles shown in FIG. 1 are small, and the sprayed coating 8 can be formed at a high density. It is possible to prevent intrusion of radicals (for example, active F radicals and Cl radicals) by attack, and it is possible to reduce impurity contamination from components.
- radicals for example, active F radicals and Cl radicals
- the adhesion film deposited on it is also an adhesion film form that stably deposits, and it is possible to stably and effectively suppress peeling of the deposits deposited on the part. it can. Further, since there is no generation of protrusions that induce the generation of particles formed on the melt-deposited sprayed coating, an effect of greatly reducing the amount of generated particles can be obtained.
- nitride particles to be formed a sprayed coating is aluminum nitride (AlN) particles, it is preferably contained in addition to aluminum oxide (Al 2 O 3) is less than 10 wt% of a nitride of unmelted.
- Aluminum nitride coating has higher corrosion resistance against active radicals from fluorine plasma and chlorine plasma than yttrium oxide coating, and the amount of corrosion products generated in the coating itself is extremely small, reducing the frequency of parts replacement due to wear. Is obtained.
- aluminum nitride has high plasma etching property, an aluminum nitride sprayed coating on which unmelted particles are deposited has a particularly high effect.
- the sprayed coating of aluminum nitride collides particles at a high speed and forms a coating with the collision energy, but when the aluminum nitride particles are coated by thermal spraying, the surface of the aluminum nitride particles changes to aluminum oxide. .
- the aluminum oxide film formed on the surface of the aluminum nitride particles serves to facilitate the formation of the film by promoting bonding between the particles. For this reason, the sprayed coating of aluminum nitride has a coating structure containing aluminum oxide, but the ratio of aluminum oxide contained in the coating of aluminum nitride is preferably 10% or less.
- the content ratio of aluminum oxide exceeds 10% by mass, the bonding force between particles is improved, but wear due to plasma etching is likely to occur, and the amount of generated particles may increase. Moreover, when the content ratio of aluminum oxide is 10% by mass or less, wear due to plasma attack and radical attack is reduced, the amount of particles generated is reduced, and plasma resistance is improved. A more preferable value of the content ratio is 5% by mass or less, and more preferably 3% by mass or less. In addition, in order to acquire the containing effect of aluminum oxide, 2 mass% or more is preferable. However, when the content of aluminum oxide is 0.2% or more, the particle bond of aluminum nitride is improved, so the lower limit is preferably 0.2% or more. The effect of adding aluminum oxide can be obtained not only when the thermal spray material is AlN but also when Si 3 N 4 or BN is used.
- the porosity of the thermal spray coating is desirably 5% or less. Thereby, the plasma inflow into the pores can be suppressed and the bond strength between the particles constituting the thermal spray coating can be increased, so that the generation of particles due to wear can be reduced. If this porosity exceeds 5%, plasma etching occurs intensively in the pores, which may promote the generation of particles from that portion, and the thermal spray coating may be easily peeled off, resulting in the number of parts replacement. May increase and decrease productivity. A more preferable range of the porosity is 1% or less.
- the surface roughness of the sprayed coating is desirably 5 ⁇ m or less in terms of the average roughness Ra.
- the surface roughness of the sprayed coating is desirably 5 ⁇ m or less in terms of the average roughness Ra.
- the lower layer is an aluminum oxide film
- other oxides, nitrides, or a mixture thereof may be used, and it is preferable to select a material according to necessary characteristics. Further, the effect is exhibited even when an aluminum nitride film is formed and then the outermost surface of the film is fluorinated to form a fluoride film.
- the film thickness of the thermal spray coating according to the present invention is preferably 10 ⁇ m or more, more preferably 50 ⁇ m or more.
- the upper limit of the thermal spray coating is not particularly limited, but it is preferably 500 ⁇ m or less because no further effect can be obtained even if it is excessively thick.
- the coating structure By controlling to such a coating structure, plasma resistance and corrosion resistance are greatly improved, so it becomes possible to reduce impurity contamination from the parts, and to remove the deposits deposited on the parts stably and effectively. Can be suppressed.
- the surface of the coating is in the form of fine particles, the deposited film deposited on the surface also forms an deposited film that stably deposits, and projections that induce the generation of particles formed on the melt-deposited sprayed coating. Since there is no generation, an effect of greatly reducing the generation amount of particles can be obtained.
- a nitride spray coating densely in an unmelted state to reduce the number of particles in the plasma etching apparatus and reduce the number of parts replacement (long life).
- the porosity is small and the optimum sprayed surface roughness can be obtained, so that it is possible to achieve a surface form and sprayed structure with high plasma etching resistance, and the effects of both are demonstrated synergistically.
- a sprayed coating is obtained.
- the fine powder particles are preferably several ⁇ m or less. However, if the particles are excessively small, the particles form aggregates and the aggregates are bonded to each other, so that densification is inhibited and adhesion of the deposited particles is reduced.
- the shape of the fine powder is preferably an angular shape like a pulverized powder rather than a spherical shape.
- the coating surface is further sprayed with dry ice pellets to perform cleaning treatment to remove particles that are likely to fall off, fine particles can be removed. Since the surface roughness is reduced, dry eye screening is preferably performed. Further, after the coating is formed, post-processing may be performed by polishing and mirror finishing. However, since the minute foreign matter by the surface processing remains on the surface and easily becomes a generation source of particles, it is preferable to perform a removal cleaning process by spraying dry ice pellets after the processing.
- the thermal spraying conditions appropriately selected according to the constituent material and shape of the component body, the environmental conditions used, the thermal spray material, etc. .
- fine nitride particles having a powder particle size of about several microns are used.
- a desired binding particle size and surface roughness can be obtained by selecting and using a particle size range of the supplied powder.
- the average particle size of the supplied powder is preferably 10 ⁇ m or less, and more preferably 1 ⁇ m or more and 3 ⁇ m or less. Then, by controlling the spraying conditions such as the gas flow rate, pressure, spraying distance, nozzle diameter, and material supply amount, the sprayed coating structure in which unmelted particles are bonded, the surface roughness, the porosity, and the like can be controlled.
- the critical speed at which the fine powder starts to deposit due to the impact energy varies depending on the material of the fine powder to be used, but the fine powder deposition is started by setting the speed of the fine powder particles to about 400 m / sec to 800 m / sec. As a result, a film is formed. In order to obtain this particle velocity, particles are deposited without blasting by spraying the fine powder with the combustion gas, so it is necessary to select a gas type. It is preferable to use combustion energy such as acetylene, oxygen, and kerosene as the combustion gas.
- FIG. 9 is a schematic diagram showing a main configuration of a plasma etching apparatus which is an embodiment of the semiconductor manufacturing apparatus of the present invention.
- Plasma etching processing of various thin films such as insulating films, electrode films, and wiring films formed on a substrate or microfabrication of Si is performed by utilizing the interaction between a microwave electric field and a magnetic field as shown in FIG. It can be carried out using a microwave etching apparatus that converts gas into plasma.
- a quartz discharge tube 11 is provided in the upper part of the vacuum apparatus processing chamber 10, a gas supply port 12 for introducing an etching gas is disposed in the processing chamber 10, and a vacuum exhaust port 13 is provided.
- the processing chamber 10 is provided with a sample stage 14 on which a wafer is placed.
- a high frequency power supply 15 is connected to the sample stage 14 so that high frequency power is applied to the sample stage 14.
- a waveguide 16 is provided outside the discharge tube 11, and a solenoid coil 17 for generating a magnetic field in the discharge tube is further provided outside the waveguide 16.
- a magnetron 18 that oscillates microwaves is provided at the end of the waveguide 16.
- an etching gas is introduced from the gas supply port 12 into the processing chamber 10, and the processing chamber 10 is evacuated, and then the microwave from the magnetron 18 is introduced into the discharge tube 11 through the waveguide 16, and the solenoid coil.
- a magnetic field is formed by 17, and the etching gas in the discharge tube 11 is turned into plasma by the interaction between the microwave electric field and the magnetic field by the solenoid coil 17.
- high frequency power is applied to the sample stage 14 from the high frequency power source 15 to generate a bias voltage, and ions in the plasma are drawn to the wafer 19 side to perform anisotropic etching.
- the thermal spray coating 20 containing unmelted nitride particles is formed on the inner surface of a quartz discharge tube 11 as a component body.
- thermal spray coating 20 can reduce wear due to plasma and radicals as described above, it is possible to reduce generation of particles due to peeling of the thermal spray coating 20. At the same time, since the quartz surface of the discharge tube 11 can be prevented from being exposed, generation of particles due to peeling from the quartz surface can be reduced.
- Example 1 An AlN film having a film thickness of 50 ⁇ m was formed on the inner surface of the discharge tube 11 made of quartz, which is a component of the plasma etching apparatus as shown in FIG. That is, using an ultra-high-speed flame spraying equipment, an oxygen flow rate of 138 cc / min, a kerosene supply rate of 133 cc / min, a supply acetylene pressure of 30 psi were set, and an AlN powder material having an average particle size of 2.3 ⁇ m was injected together with combustion gas, An AlN film was formed by depositing on the surface of each part. At that time, the spraying distance was set in the range of 130 to 160 mm as shown in Table 1.
- each part on which the AlN coating was formed is then subjected to conditions of a temperature of 200 ° C. ⁇ 2 hours. And dried.
- plasma etching of an aluminum alloy film on an 8-inch wafer is performed using a mixed gas of BCl 3 + Cl 2 + N 2 , and the average particle generation amount up to a predetermined number of wafers processed A comparative study with the number of wafers processed was performed.
- the generation amount of particles was obtained by measuring the number of particles having a diameter of 0.2 ⁇ m or more mixed on an 8-inch wafer with a particle counter. In addition, the service life was confirmed by the number of wafers processed immediately before the amount of particles generated increased rapidly and exceeded 50. These results are shown in Table 1.
- Example 2 A Si 3 N 4 film 20 having a thickness of 50 ⁇ m was formed on the inner surface of a quartz discharge tube 11 as a component of the plasma etching apparatus as shown in FIG. That is, using an ultra-high-speed flame spraying equipment, setting an oxygen flow rate of 128 cc / min, a kerosene supply rate of 130 cc / min, and a supply acetylene pressure of 30 psi, an Si 3 N 4 powder material having an average particle size of 2.3 ⁇ m is injected together with combustion gas The Si 3 N 4 coating 20 was formed by depositing on the surface of each component. At that time, the spraying distance was set in the range of 130 to 160 mm as shown in Table 1.
- plasma etching of an aluminum alloy film on an 8-inch wafer is performed using a mixed gas of BCl 3 + Cl 2 + N 2 , and the average particle generation amount up to a predetermined number of wafers processed A comparative study with the number of wafers processed was performed.
- the generation amount of particles was obtained by measuring the number of particles having a diameter of 0.2 ⁇ m or more mixed on an 8-inch wafer with a particle counter. In addition, the service life was confirmed by the number of wafers processed immediately before the amount of particles generated increased rapidly and exceeded 50. These results are shown in Table 1.
- Example 3 A BN film 20 having a film thickness of 50 ⁇ m was formed on the inner surface of the discharge tube 11 made of quartz, which is a component of the plasma etching apparatus as shown in FIG. That is, using an ultra-high-speed flame spraying equipment, setting an oxygen flow rate of 130 cc / min, a kerosene supply amount of 135 cc / min, and a supply acetylene pressure of 30 psi, BN powder material having an average particle size of 2.2 ⁇ m is injected together with combustion gas, A BN coating 20 was formed by depositing on the surface of each component. At that time, the spraying distance was set in the range of 140 to 160 mm as shown in Table 1.
- the BN coating surface is cleaned by spraying dry ice pellets onto the surface of the BN coating 20 at a pressure of 5 kg / cm 2 , and then each component on which the BN coating 20 is formed is heated to 200 ° C. ⁇ 2 hours. The drying process was performed on the conditions of these.
- plasma etching of an aluminum alloy film on an 8-inch wafer is performed using a mixed gas of BCl 3 + Cl 2 + N 2 , and the average particle generation amount up to a predetermined number of wafers processed A comparative study with the number of wafers processed was performed.
- the generation amount of particles was obtained by measuring the number of particles having a diameter of 0.2 ⁇ m or more mixed on an 8-inch wafer with a particle counter. In addition, the service life was confirmed by the number of wafers processed immediately before the amount of particles generated increased rapidly and exceeded 50. These results are shown in Table 1.
- Example 4 After the Al 2 O 3 coating 20 having a film thickness of 60 ⁇ m is formed on the inner surface of the discharge tube 11 made of quartz, which is a component of the plasma etching apparatus as shown in FIG. 9, the Al 2 O 3 An AlN film of 50 ⁇ m was formed on the film 20. That is, using an ultra-high-speed flame spraying equipment, oxygen flow rate of 132 cc / min, kerosene supply rate of 138 cc / min, supply acetylene pressure of 30 psi, and Al 2 O 3 powder material with an average particle size of 2.1 ⁇ m are injected together with combustion gas The Al 2 O 3 coating 20 was formed by depositing on the surface of each component.
- the spraying distance was set to 130 to 160 mm.
- an oxygen flow rate of 138 cc / min, a kerosene supply rate of 133 cc / min, and a supply acetylene pressure of 30 psi were set, and an AlN powder material having an average particle size of 2.3 ⁇ m was injected together with the combustion gas.
- An AlN coating was formed by depositing on the surface of the Al 2 O 3 coating. By spraying dry ice pellets onto the surface of the AlN film at a pressure of 5 kg / cm 2 , the surface of the AlN film is cleaned, and then each part on which the AlN film is formed is dried at a temperature of 200 ° C. for 2 hours. Was given.
- plasma etching of an aluminum alloy film on an 8-inch wafer is performed using a mixed gas of BCl 3 + Cl 2 + N 2 , and the average particle generation amount up to a predetermined number of wafers processed A comparative study with the number of wafers processed was performed.
- the generation amount of particles was obtained by measuring the number of particles having a diameter of 0.2 ⁇ m or more mixed on an 8-inch wafer with a particle counter. In addition, the service life was confirmed by the number of wafers processed immediately before the amount of particles generated increased rapidly and exceeded 50. These results are shown in Table 1.
- plasma etching is performed on an aluminum alloy film formed on an 8-inch wafer using a mixed gas of BCl 3 + Cl 2 + N 2 , and the average particle size up to a predetermined number of wafers processed
- Table 1 A comparison between the generation amount and the number of wafers processed until just before the generation amount of particles exceeds 50 is shown in Table 1 below.
- Example 2 An AlN film having a film thickness of 50 ⁇ m was formed on the inner surface of the discharge tube 11 made of quartz, which is a component of the plasma etching apparatus as shown in FIG. At that time, AlN raw material powder containing 40% (sample 15), 30% (sample 16) and 20% (sample 17) of Al 2 O 3 was used. As in Example 1, the treated product uses an ultra-high-speed flame spraying equipment, and is set to an oxygen flow rate of 138 cc / min, a kerosene supply rate of 133 cc / min, a supply acetylene pressure of 30 psi, and an AlN powder material having an average particle size of 1.8 ⁇ m.
- plasma etching is performed on an aluminum alloy film formed on an 8-inch wafer using a mixed gas of BCl 3 + Cl 2 + N 2 , and the average particle size up to a predetermined number of wafers processed
- Table 1 A comparison between the generation amount and the number of wafers processed until just before the generation amount of particles exceeds 50 is shown in Table 1 below.
- Example 5 An AlN coating 20 having a thickness of 50 ⁇ m was formed on the inner surface of a quartz discharge tube 11 as a component of the plasma etching apparatus as shown in FIG. That is, using an ultra-high-speed flame spraying equipment, an oxygen flow rate of 138 cc / min, a kerosene supply rate of 133 cc / min, a supply acetylene pressure of 30 psi, an AlN powder material having an average particle size of 1.6 ⁇ m is injected together with combustion gas, An AlN film 20 was formed by depositing on the surface of each part. At that time, the spraying distance was set in the range of 130 to 160 mm as shown in Table 1.
- plasma etching of the SiO 2 film formed on the 8-inch wafer is performed using a mixed gas of CF 4 + O 2 + Ar, and the average generation of particles up to a predetermined number of wafers processed The amount and the number of processed wafers were compared and the results are shown in Table 1 below.
- a Y 2 O 3 film having a thickness of 50 ⁇ m was formed on the inner surface of the discharge tube 11 made of quartz, which is a component of the plasma etching apparatus as shown in FIG. That is, a thermal spray coating made of an oxide of Y 2 O 3 using a Y 2 O 3 powder having an average particle size of 33 ⁇ m, by setting the current 550 A, voltage 75 V, Ar gas flow rate / pressure to 100/100 by plasma spraying. Formed. At that time, the spraying distance was set in the range of 130 to 150 mm as shown in Table 1. On the surface of each particle constituting the sprayed coating, an Al oxide film of impurities contained in the raw material powder was formed.
- plasma etching of the SiO 2 film on the 8-inch wafer is performed using a mixed gas of CF 4 + O 2 + Ar, and the average particle generation amount up to a predetermined number of wafers processed and the wafer Comparison with the number of processed sheets was performed, and the results are shown in Table 1 below.
- Crystal structure ratio of particles constituting the thermal spray coating The surface of the sprayed coating was analyzed by X-ray mass spectrometry, and the content of Al 2 O 3 was calculated from the peak intensity ratio of the main peak of AlN and the main peak of Al 2 O 3 . Further, when Si 3 N 4 or BN is used as the thermal spray material, the content of each oxide is determined from the peak intensity ratio between the main peak of the thermal spray material and the main peak of each oxide (SiO 2 or B 2 O 3 ). The amount was calculated.
- the thermal spray coating is directly formed on the surface of the component main body.
- at least one oxide film made of Al 2 O 3 or the like is formed on the surface of the component main body, and the outermost surface thereof.
- the component for a semiconductor manufacturing apparatus and the component for a compound semiconductor manufacturing apparatus According to the present invention, particles generated from the component parts can be stably and effectively prevented, and the coating film for preventing peeling itself. It becomes possible to improve the stability of the. Therefore, it is possible to reduce the number of times of cleaning and part replacement of the semiconductor manufacturing apparatus and the compound semiconductor manufacturing apparatus. Further, according to the semiconductor manufacturing apparatus and the compound semiconductor manufacturing apparatus of the present invention having such a component for a semiconductor manufacturing apparatus and a component for a compound semiconductor manufacturing apparatus, particles in a film that causes a defect in a wiring film or an element are generated. Mixing can be suppressed, and productivity can be improved and the cost of consumable parts can be reduced.
- the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying constituent elements without departing from the scope of the invention in the implementation stage.
- various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment.
- constituent elements over different embodiments may be appropriately combined.
- the method of generating the plasma of the processing gas has been described using the interaction between the microwave electric field and the magnetic field, but the method of generating the plasma is not limited to this, for example, The same effects can be applied to plasma generators such as those using parallel plate electrodes, those using high frequency coils, and those using inductive energy.
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Abstract
Description
本発明は、部品から発生する微細なダストの発生を安定かつ有効に抑制することが可能であり、部品からの不純物による汚染防止が可能な半導体製造装置用部品や化合物半導体製造装置用部品及び半導体製造装置や化合物半導体製造装置を提供することを目的としている。
前述した図9に示すようなプラズマエッチング装置の構成部品である石英製の放電管11の内面に、下記要領で膜厚が50μmであるAlN被膜を形成した。すなわち、超高速フレーム溶射設備を使用し、酸素流量138cc/min、灯油供給量133cc/min、供給アセチレン圧力30psiに設定し、平均粒径2.3μmのAlN粉末材料を燃焼ガスと共に噴射せしめ、上記各部品表面に堆積せしめてAlN被膜を形成した。その際、溶射距離は表1に示すように130~160mmの範囲に設定して実施した。次に、圧力5kg/cm2でドライアイスペレットをAlN被膜表面に吹付けることにより、AlN被膜面のクリーニング処理を実施し、しかる後にAlN被膜を形成した各部品を温度200℃×2時間の条件で乾燥処理を施した。
前述した図9に示すようなプラズマエッチング装置の構成部品である石英製の放電管11の内面に、下記要領で膜厚が50μmであるSi3N4被膜20を形成した。すなわち、超高速フレーム溶射設備を使用し、酸素流量128cc/min、灯油供給量130cc/min、供給アセチレン圧力30psiに設定し、平均粒径2.3μmのSi3N4粉末材料を燃焼ガスと共に噴射せしめ、上記各部品表面に堆積せしめてSi3N4被膜20を形成した。その際、溶射距離は表1に示すように130~160mmの範囲に設定して実施した。次に、圧力5kg/cm2でドライアイスペレットをSi3N4被膜20の表面に吹付けることにより、Si3N4被膜20面のクリーニング処理を実施し、しかる後にSi3N4被膜20を形成した各部品を温度200℃×2時間の条件で乾燥処理を施した。
前述した図9に示すようなプラズマエッチング装置の構成部品である石英製の放電管11の内面に、下記要領で膜厚が50μmであるBN被膜20を形成した。すなわち、超高速フレーム溶射設備を使用し、酸素流量130cc/min、灯油供給量135cc/min、供給アセチレン圧力30psiに設定し、平均粒径2.2μmのBN粉末材料を燃焼ガスと共に噴射せしめ、上記各部品表面に堆積せしめてBN被膜20を形成した。その際、溶射距離は表1に示すように140~160mmの範囲に設定して実施した。次に、圧力5kg/cm2でドライアイスペレットをBN被膜20表面に吹付けることにより、BN被膜面のクリーニング処理を実施し、しかる後にBN被膜20を形成した各部品を温度200℃×2時間の条件で乾燥処理を施した。
前述した図9に示すようなプラズマエッチング装置の構成部品である石英製の放電管11の内面に、下記要領で膜厚が60μmであるAl2O3被膜20形成した後、そのAl2O3被膜20の上にAlN被膜を50μm形成した。すなわち、超高速フレーム溶射設備を使用し、酸素流量132cc/min、灯油供給量138cc/min、供給アセチレン圧力30psiに設定し、平均粒径2.1μmのAl2O3粉末材料を燃焼ガスと共に噴射せしめ、上記各部品表面に堆積せしめてAl2O3被膜20を形成した。その際、溶射距離は130~160mmに設定して実施した。次に、超高速フレーム溶射設備を使用し、酸素流量138cc/min、灯油供給量133cc/min、供給アセチレン圧力30psiに設定し、平均粒径2.3μmのAlN粉末材料を燃焼ガスと共に噴射せしめ、上記Al2O3被膜表面に堆積せしめてAlN被膜を形成した。圧力5kg/cm2でドライアイスペレットをAlN被膜表面に吹付けることにより、AlN被膜面のクリーニング処理を実施し、しかる後にAlN被膜を形成した各部品を温度200℃×2時間の条件で乾燥処理を施した。
前述した図9に示すようなプラズマエッチング装置の構成部品である石英製の放電管11の内面に、下記要領で膜厚が50μmであるAl2O3溶射被膜を形成した。すなわち、プラズマ溶射設備を使用し、電流650A、電圧55V、Arガス流量/圧力を75/80に設定し、平均粒径32μmのAl2O3粉末材料を上記各部品表面に堆積せしめてAl2O3溶射被膜を形成した。その際、溶射距離は表1に示すように120~150mmの範囲に設定して実施した。しかる後に、Al2O3溶射被膜を形成した各部品を温度200℃×2時間の条件で乾燥処理を施した。
前述した図9に示すようなプラズマエッチング装置の構成部品である石英製の放電管11の内面に、下記要領で膜厚が50μmであるAlN被膜を形成した。その際、Al2O3が夫々40%(試料15)、30%(試料16)及び20%(試料17)含有するAlN原料粉末を使用した。処理品は実施例1と同様に、超高速フレーム溶射設備を使用し、酸素流量138cc/min、灯油供給量133cc/min、供給アセチレン圧力30psiに設定し、平均粒径1.8μmのAlN粉末材料を燃焼ガスと共に噴射せしめ、上記各部品表面に堆積せしめてAlN被膜を形成した。その際、溶射距離は表1に示すように130~160mmの範囲に設定して実施した。次に、圧力5kg/cm2でドライアイスペレットをAlN被膜表面に吹付けることにより、AlN被膜面のクリーニング処理を実施し、しかる後にAlN被膜を形成した各部品を温度200℃×2時間の条件で乾燥処理を施した。
前述した図9に示すようなプラズマエッチング装置の構成部品である石英製の放電管11の内面に、下記要領で膜厚が50μmであるAlN被膜20を形成した。すなわち、超高速フレーム溶射設備を使用し、酸素流量138cc/min、灯油供給量133cc/min、供給アセチレン圧力30psiに設定し、平均粒径1.6μmのAlN粉末材料を燃焼ガスと共に噴射せしめ、上記各部品表面に堆積せしめてAlN被膜20を形成した。その際、溶射距離は表1に示すように130~160mmの範囲に設定して実施した。次に、圧力5kg/cm2でドライアイスペレットをAlN被膜表面に吹付けることにより、AlN被膜面のクリーニング処理を実施し、しかる後にAlN被膜20を形成した各部品を温度200℃×2時間の条件で乾燥処理を施した。
前述した図9に示すようなプラズマエッチング装置の構成部品である石英製の放電管11の内面に、下記要領で膜厚が50μmであるY2O3被膜を形成した。すなわちプラズマ溶射法により、電流550A、電圧75V、Arガス流量/圧力を100/100に設定し、平均粒径33μmのY2O3粉末を使用し、Y2O3の酸化物から成る溶射被膜を形成した。その際、溶射距離は表1に示すように130~150mmの範囲に設定して実施した。溶射被膜を構成する各粒子表面には原料粉末中に含有される不純物のAlの酸化膜が形成されていた。
日本工業規格(JIS B 0601-1994)で規定する算術平均粗さを表面粗さRaとした。
溶射被膜の膜厚方向に切断した断面組織を、倍率500倍の光学顕微鏡で観察し、縦210μm×横270μmの観察視野で空孔の面積を測定し、下記(1)式から気孔率(%)として換算し、各視野10箇所の平均値を気孔率として下記表1に示す。
気孔率(%)=(S2/S1)×100 (1)
但し、S1は縦210μm×横270μmの視野面積(μm2)で、S2は縦210μm×横270μmの視野内における空孔の合計面積(μm2)である。
溶射被膜の表面を、X線質量分析法によって分析し、AlNの主ピークとAl2O3の主ピークのピーク強度比からAl2O3の含有量を算出した。また、溶射材料としてSi3N4やBNを使用した場合についても、溶射材料の主ピークと各酸化物(SiO2やB2O3)の主ピークとのピーク強度比から各酸化物の含有量を算出した。
Claims (8)
- 部品本体と、原料粉末としての窒化物粒子の溶射により前記部品本体の表面に形成された溶射被膜とを具備する半導体製造装置用部品であって、前記溶射被膜は窒化物の粉末粒子が未溶融で90%以上堆積して形成されていることを特徴とする半導体製造装置用部品。
- 請求項1記載の半導体製造装置用部品において、前記溶射被膜の窒化物以外の残部は酸化物であり、前記未溶融の窒化物粒子は原料粉末の結晶構造を維持していることを特徴とする半導体製造装置用部品。
- 請求項1または請求項2に記載の半導体製造装置用部品において、前記窒化物粒子は窒化アルミニウム、窒化ボロン、窒化けい素の少なくとも1種であることを特徴とする半導体製造装置用部品。
- 請求項1ないし請求項3のいずれか1項に記載の半導体製造装置用部品において、前記窒化物粒子は窒化アルミニウム(AlN)粒子であり、前記溶射被膜は未溶融の窒化物の他に酸化物としての酸化アルミニウム(Al2O3)を10質量%以下含有することを特徴とする半導体製造装置用部品。
- 請求項1ないし請求項4のいずれか1項記載の半導体製造装置用部品において、前記溶射被膜の気孔率が5%以下であることを特徴とする半導体製造装置用部品。
- 請求項1ないし請求項5のいずれか1項記載の半導体製造装置用部品において、前記溶射被膜の表面粗さが算術平均粗さRaで5μm以下であることを特徴とする半導体製造装置用部品。
- 請求項1ないし請求項6のいずれか1項記載の半導体製造装置用部品において、前記部品本体表面には少なくとも1層の酸化膜皮膜が形成されており、前記溶射被膜が酸化物被膜の最表面に形成されていることを特徴とする半導体製造装置用部品。
- 請求項1ないし請求項7のいずれか1項に記載の半導体製造装置用部品を具備することを特徴とする半導体製造装置。
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JP (1) | JP5566891B2 (ja) |
KR (1) | KR101284474B1 (ja) |
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Cited By (6)
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WO2013191224A1 (ja) * | 2012-06-20 | 2013-12-27 | 東京エレクトロン株式会社 | シーズニング方法、プラズマ処理装置及び製造方法 |
JP2014122418A (ja) * | 2012-11-22 | 2014-07-03 | Gunma Prefecture | 複層皮膜付き基材およびその製造方法 |
JP2017071835A (ja) * | 2015-10-08 | 2017-04-13 | 広島県 | 窒化アルミニウムの皮膜製造方法及びその方法により製造される窒化アルミニウム皮膜 |
JP2021015937A (ja) * | 2019-07-16 | 2021-02-12 | 日本特殊陶業株式会社 | 加熱部材 |
KR20210039464A (ko) | 2018-08-27 | 2021-04-09 | 도카로 가부시키가이샤 | 용사피막의 형성방법 |
US11873553B2 (en) | 2017-09-01 | 2024-01-16 | Shibaura Institute Of Technology | Component and apparatus of manufacturing semiconductor |
Families Citing this family (1)
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KR102504290B1 (ko) | 2015-12-04 | 2023-02-28 | 삼성전자 주식회사 | 수소 플라스마 어닐링 처리 준비 방법, 수소 플라스마 어닐링 처리 방법, 및 수소 플라스마 어닐링 장치 |
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JP2004083929A (ja) * | 2002-08-22 | 2004-03-18 | Tosoh Corp | 窒化アルミニウム溶射膜及びその製造方法 |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2013191224A1 (ja) * | 2012-06-20 | 2013-12-27 | 東京エレクトロン株式会社 | シーズニング方法、プラズマ処理装置及び製造方法 |
JPWO2013191224A1 (ja) * | 2012-06-20 | 2016-05-26 | 東京エレクトロン株式会社 | シーズニング方法、プラズマ処理装置及び製造方法 |
JP2014122418A (ja) * | 2012-11-22 | 2014-07-03 | Gunma Prefecture | 複層皮膜付き基材およびその製造方法 |
JP2017071835A (ja) * | 2015-10-08 | 2017-04-13 | 広島県 | 窒化アルミニウムの皮膜製造方法及びその方法により製造される窒化アルミニウム皮膜 |
US11873553B2 (en) | 2017-09-01 | 2024-01-16 | Shibaura Institute Of Technology | Component and apparatus of manufacturing semiconductor |
KR20210039464A (ko) | 2018-08-27 | 2021-04-09 | 도카로 가부시키가이샤 | 용사피막의 형성방법 |
JP2021015937A (ja) * | 2019-07-16 | 2021-02-12 | 日本特殊陶業株式会社 | 加熱部材 |
JP7312631B2 (ja) | 2019-07-16 | 2023-07-21 | 日本特殊陶業株式会社 | 加熱部材 |
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JP5566891B2 (ja) | 2014-08-06 |
KR101284474B1 (ko) | 2013-07-15 |
JPWO2010027073A1 (ja) | 2012-02-02 |
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