WO2007148470A1 - 処理装置、処理方法及びプラズマ源 - Google Patents
処理装置、処理方法及びプラズマ源 Download PDFInfo
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- WO2007148470A1 WO2007148470A1 PCT/JP2007/058593 JP2007058593W WO2007148470A1 WO 2007148470 A1 WO2007148470 A1 WO 2007148470A1 JP 2007058593 W JP2007058593 W JP 2007058593W WO 2007148470 A1 WO2007148470 A1 WO 2007148470A1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/30—Plasma torches using applied electromagnetic fields, e.g. high frequency or microwave energy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—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 at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System 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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/42—Stripping or agents therefor
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/42—Stripping or agents therefor
- G03F7/427—Stripping or agents therefor using plasma means only
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—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 at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System 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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/30604—Chemical etching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—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 at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System 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
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31105—Etching inorganic layers
- H01L21/31111—Etching inorganic layers by chemical means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—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 at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System 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
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31127—Etching organic layers
- H01L21/31133—Etching organic layers by chemical means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—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 at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System 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
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31127—Etching organic layers
- H01L21/31133—Etching organic layers by chemical means
- H01L21/31138—Etching organic layers by chemical means by dry-etching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67069—Apparatus for fluid treatment for etching for drying etching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67075—Apparatus for fluid treatment for etching for wet etching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67075—Apparatus for fluid treatment for etching for wet etching
- H01L21/6708—Apparatus for fluid treatment for etching for wet etching using mainly spraying means, e.g. nozzles
Definitions
- Processing apparatus Processing apparatus, processing method, and plasma source
- the present invention relates to a processing apparatus and a processing method for processing the surface of an object to be processed, and in particular, formed on a semiconductor substrate such as silicon, a semiconductor memory using the semiconductor substrate, an integrated circuit, or a glass substrate.
- the present invention relates to a processing apparatus and a processing method used in a manufacturing process of a display device as an object to be processed.
- the present invention also relates to a plasma source for generating plasma, a processing object processing apparatus using plasma, and a processing method therefor.
- a number of surface treatments such as cleaning of a substrate surface, removal of a resist, and etching of a film are performed by wet treatment.
- m hydroxide / hydrogen peroxide / water mixture (hereinafter abbreviated as “APM”) is a method that removes particles on the surface by oxidizing the surface with hydrogen peroxide water and removing the oxide film with ammonia. it can.
- APM m hydroxide / hydrogen peroxide / water mixture
- HPM ydrogen Peroxide / water Mixture
- FPM e / water Mixture
- HF / H 2 O Diluted HydroFluoric acid
- DHF can remove an unnecessary natural oxide film on the silicon surface.
- a cleaning process using an APM heated to 75 to 85 degrees is performed on the silicon surface to remove surface particles, followed by a cleaning process using DHF to remove unnecessary natural oxide film on the surface.
- the resist is first subjected to dry cleaning using oxygen plasma or oxygen atoms, and then removed by wet cleaning using the SPM.
- the H SO solution is first subjected to dry cleaning using oxygen plasma or oxygen atoms, and then removed by wet cleaning using the SPM.
- the H SO solution can remove an unnecessary natural oxide film on the silicon surface.
- a silicon nitride film As a case of wet etching the coating formed on the substrate surface, for example, there is a step of removing a silicon nitride film.
- a method of selective oxidation using a silicon nitride film as a mask is used to separate the MOS transistors. After this oxidation step, the silicon nitride film is unnecessary. Removed.
- the surface of the silicon nitride film was slightly oxidized in the oxidation process, and the etching process was somewhat complicated. First, the oxide film on the silicon nitride film was wet-etched with a hydrofluoric acid aqueous solution, and then 160-degree hot phosphoric acid (HPO aqueous solution) entered.
- HPO aqueous solution 160-degree hot phosphoric acid
- the silicon nitride film was removed by immersing in a cleaning tank for about 40 minutes. Finally, the oxide film that was the base of the silicon nitride film was wet etched with a hydrofluoric acid aqueous solution.
- FIG. 24 shows a method of circulating cooling water or a cooling gas, for example, FIG.
- the cooling gas 70 surrounds the plasma 160 transferred to the front of the plasma generator 116.
- FIG. 24 (B) when the workpiece 144 to be processed is arranged on the front surface of the plasma 160, when the cooling gas 70 is ejected, the cooling gas 70 has an expanded shape, and the plasma 160 is contained therein. Be placed. In this case, the cooling gas 70 is mixed in the plasma 160 for turbulence and diffusion. If the cooling gas 70 is not ejected or ejected in a different direction, ambient atmospheric gas is mixed into the plasma 160 and the purity of the plasma 160 is lowered.
- Patent Document 1 JP 2005-31020 A
- Patent Document 2 Japanese Patent Laid-Open No. 2003-194723
- hydrogen peroxide 0 is mixed in APM, HPM, SPM, and FPM used in the cleaning process. Hydrogen peroxide functions as an oxidant in aqueous solution,
- the present invention has been made in view of these problems, and an object of the present invention is to provide a processing apparatus and a processing method that shorten the lead time and are more reliable in processing performance than in the past. To do. Another object of the present invention is to provide a processing device and a processing method capable of improving the performance or reliability of a semiconductor device.
- a processing apparatus of the present invention provides a chamber, holding means provided in the chamber and holding an object to be processed, and supplying active atoms in the chamber.
- An active atom supply unit; and a chemical solution supply unit configured to supply a chemical solution into the chamber.
- the dry treatment by the active atom supplied from the active atom supply unit and the chemical solution are performed on the surface of the object to be processed. It is characterized by performing a wet process with a chemical solution supplied from a supply means.
- the active atom supply means supplies the active atoms into the chamber under atmospheric pressure.
- the holding means is capable of rotating the object to be processed, and the supply port of the active atom supply means is disposed so as to face the surface of the object to be processed. Further, it may be provided to be movable in the radial direction from the rotation center of the workpiece. In this case, the supply port of the active atom supply unit and the supply port of the chemical solution supply unit may be integrated.
- the supply port of the active atom supply means may face the surface of the object to be processed and have an area equal to or larger than the size of the object to be processed.
- the holding means may be provided so as to hold a plurality of the objects to be processed, and may be provided so that the plurality of objects to be processed can be immersed in the chemical solution.
- the chemical solution may contain sulfuric acid, and the active atom may contain hydrogen atoms or oxygen atoms.
- the chemical solution may be ammonium hydroxide, hydrochloric acid, sulfuric acid, or hydrogen fluoride.
- the active atom may include an oxygen atom.
- the object to be processed may include a semiconductor on a processing surface, the active atom may include a hydrogen atom, and the chemical solution may include phosphoric acid.
- the active atom may include a fluorine atom.
- the object to be processed has a resist film on a processing surface, the active atom includes a hydrogen atom or an oxygen atom, and the resist film on the object to be processed is removed. You may do.
- the active atom supply means generates the active atoms using an inductively coupled plasma method or a microwave plasma method.
- the processing method of the present invention uses the dry treatment with active atoms supplied from the active atom supply means and the chemical solution supplied from the chemical supply means on the surface of the object to be processed held in the chamber.
- the wet process is performed simultaneously or continuously.
- the dry processing is preferably performed under atmospheric pressure.
- the supply of active atoms to a part of the surface of the object to be processed is performed while supplying the chemical liquid supplied from the chemical liquid supply unit to the entire surface of the object to be processed. You may supply the active atom supplied from a means.
- the active atom is supplied while the supply port of the active child feeding means is moved in the radial direction from the rotation center of the treatment object while rotating the treatment object. May be.
- the object to be processed is immersed in a chemical solution supplied from the chemical solution supply means in the chamber, and the active solution is discharged into the atmosphere in the chamber while discharging the chemical solution. Atoms may be supplied.
- the chemical solution may contain sulfuric acid, and the active atom may contain hydrogen atoms or oxygen atoms.
- the chemical solution may be ammonium hydroxide, hydrochloric acid, sulfuric acid, or hydrogen fluoride.
- the active material may contain an oxygen atom, and the object to be treated may contain a semiconductor on the treated surface, and the active atom may contain a hydrogen atom, and the chemical solution contains phosphoric acid.
- the active atom may include a fluorine atom.
- the object to be processed has a resist film on a processing surface, the active atom includes a hydrogen atom or an oxygen atom, and the resist film of the object to be processed is removed. You may do.
- the plasma source of the present invention includes a plasma generation unit that generates plasma and a liquid supply unit that forms a liquid curtain, and the liquid supply unit includes at least one of plasma generated by the plasma generation unit. The part is covered with a liquid curtain.
- the processing apparatus of the present invention includes a plasma generating unit that generates plasma, a liquid supply unit that covers at least a part of the plasma generated by the plasma generation unit with a liquid curtain, and the liquid supply unit facing the liquid supply unit. And a holding part that holds the object to be processed, and is characterized in that the object to be processed held in the holding part is treated with plasma covered with a liquid tenn.
- the processing method of the present invention is characterized in that a liquid or mist is supplied into the liquid curtain, plasma is formed in the liquid curtain, and the object to be processed is processed.
- the processing method of the present invention is characterized in that a processing object is dry-treated with plasma covered with a liquid curtain, and the processing object is wet-treated with a liquid or mist.
- the dry process and the wet process can be performed simultaneously, so that the lead time can be shortened. It also reduces the contamination on the object to be processed and improves the performance of semiconductor devices. Performance or reliability can be improved. Furthermore, since the surface of the object to be processed can be controlled with high accuracy, it is possible to improve the reliability and the manufacturing yield by increasing the manufacturing accuracy. In addition, the present invention has the effects described in the section of the best mode for carrying out the invention below.
- the plasma is surrounded by the liquid curtain and the gas is shut off, high-purity processing is possible. Further, the sample can be easily and easily cooled, and the wet treatment and the dry treatment can be performed on the workpiece continuously, simultaneously, or in time series, and the plasma to be used can be used.
- the gas can be reduced, the plasma can be stabilized, the plasma torch can be lengthened, and the shape of the cooling torch part can be made simple and inexpensive, thereby obtaining useful effects.
- FIG. 1 is a diagram showing an embodiment of a processing apparatus of the present invention.
- FIG. 2 is a diagram showing an embodiment of a holding means
- FIG. 3 is a view showing another embodiment of the holding means.
- FIG. 4 is a diagram showing an embodiment of active atom supply means and chemical supply means
- FIG. 5 is a diagram showing another embodiment of the active atom supply means and the chemical solution supply means.
- FIG. 6 is a view showing another embodiment of the processing apparatus of the present invention.
- FIG. 7 is a diagram showing another embodiment of the processing apparatus of the present invention.
- FIG. 8 is a view showing another embodiment of the processing apparatus of the present invention.
- FIG. 9 is a view showing another embodiment of the processing apparatus of the present invention.
- FIG. 10 Diagram explaining the resist removal effect of active oxygen atoms
- FIG. 11 Diagram explaining the resist removal effect of active oxygen atoms
- FIG. 14 (a) is a diagram showing the etching rate of the resist when using active hydrogen atoms, and (b) is a diagram showing the etching rate of the resist when using active oxygen atoms.
- FIG. 16 is an explanatory diagram of a plasma source provided with a facing member disposed to face the liquid discharge port.
- FIG. 17 is a schematic view of the end of the liquid supply unit
- FIG. 22 is an explanatory diagram of a processing apparatus using a plasma source.
- the processing apparatus shown in FIG. 1 has a chamber 1, a holding means 3 that holds an object 2 to be processed, an active atom supply means 4, and a chemical solution supply means 5, and an active atom supply means By supplying the active atom from 4 into the chamber 1, the surface of the workpiece 2 is dry-treated, and by supplying the chemical from the chemical supply means 5 into the chamber 1, the workpiece 2 Wet treatment can be performed on the surface of the substrate. Furthermore, it is preferable that the processing apparatus has an exhaust unit and a chemical solution discharge unit.
- the chamber 1 performs dry processing and wet processing therein, and has a carry-in port and a carry-out port for the workpiece 2 not shown.
- the chamber 1 may isolate the space in the chamber 1 from the outside at least during processing in order to prevent outflow of active atoms, gas generated by dry processing or wet processing, and contamination from outside. Although it is preferable, it may be opened depending on the contents of the processing.
- the chamber 11 is preferably exhausted by an exhaust means in order to prevent the gas supplied into the chamber 11 or the gas generated by the processing from flowing out.
- the pressure in the chamber 11 is preferably between atmospheric pressure (normal pressure) and low vacuum (lOOPa or more), particularly preferably atmospheric pressure.
- a dry treatment a lower pressure can generally generate plasma stably with lower power.
- lowering the pressure increases the evaporation amount of the chemical solution, and the composition ratio of the chemical solution. Change the consumption of chemicals.
- the lead time for dry processing and wet processing is the time required to return to atmospheric pressure from a reduced pressure or reduced pressure state if the pressure is lowered. Is required and processing takes time. For this reason, it is preferable that the treatment apparatus of the present invention performs the treatment under atmospheric pressure to low vacuum (lOOPa or more), particularly preferably under atmospheric pressure (normal pressure).
- the object to be processed 2 is subjected to a dry process using active atoms supplied from the active atom supply unit 4 and a wet process using liquid supplied from the liquid supply unit 5.
- Examples of the object to be processed 2 include a semiconductor substrate itself such as silicon, a display device formed on a semiconductor substrate or a glass substrate on which various films are laminated.
- the holding means 3 holds the workpiece 2 in the chamber 11, and may be in contact with the workpiece 2 or may be levitated. Moreover, the structure which can hold
- FIG. 2 and 3 are plan views of other embodiments of the holding means 3, respectively.
- two workpieces 2 can be placed at the positions 3a and 3b of the holding means 3, and each workpiece 2 can be rotated and revolved as a whole.
- three workpieces 2 can be placed at positions 3a, 3b, 3c of the holding means 3, and each workpiece 2 can be rotated and revolved as a whole.
- the same processing may be performed at each of the positions 3a to 3c to improve productivity, or different processing may be performed to handle multiple processes.
- the workpiece 2 may be merely rotated without being revolved, or may be a receiving jig type holding means as shown in FIG.
- the active atom supply means 4 supplies active atoms and generates active atoms in atmospheric pressure and low vacuum (lOOPa or more), which is preferably a means for generating active atoms by plasma. It is particularly preferable that the active atom can be generated under atmospheric pressure.
- active atoms can be generated under atmospheric pressure using an inductively coupled plasma method, a microwave plasma method, or a plasma jet generation method.
- the inductively coupled plasma method and the microwave plasma method generate plasma using electrodeless discharge, so that it is possible to prevent the occurrence of contamination due to the metal generated from the electrodes, thereby improving the processing reliability. Can do.
- plasma includes a state in which most is ionized, or a state in which most is neutral particles and a part is ionized.
- the supply port of the active atom supply means 4 is disposed so as to face the surface of the workpiece 2 and is provided so as to be movable in the radial direction from the rotation center of the workpiece 2. Therefore, by supplying the active atoms while rotating the workpiece 2 and moving the supply port of the active atom supply means 4 in the radial direction from the rotation center, the active atoms are applied to the entire surface of the workpiece 2. Can supply.
- the chemical solution supply means 5 supplies a chemical solution, and is movably provided in FIG. However, if the chemical solution can be supplied to the entire surface of the object to be treated 2, it is not necessary to provide it so as to be movable.
- the chemical solution various acids, alkalis, neutral solutions, alcohols, pure water, or a mixture thereof can be used.
- the chemical liquid supply means may have a heating means for heating and supplying the chemical liquid.
- the active atom supply means 4 in FIG. 1 is integrated with the chemical liquid supply means 5, and the chemical liquid ejection port of the chemical liquid supply means 5 is disposed around the active atom supply means 4. For this reason, the active atom supply means 4 and the chemical solution supply means 5 can be moved simultaneously.
- the plasma torch plasma source
- the plasma torch can be cooled with chemicals. If the chemical liquid outlet of the chemical liquid supply means 5 and the active atom supply means 4 are arranged around the open portion, a liquid curtain to be described later can be formed by the discharged chemical liquid.
- FIG. 4 is a schematic view of a plasma torch (plasma source) that generates a plasma by an inductively coupled plasma method that is an embodiment of the active atom supply means 4 and emits active atoms.
- the plasma torch has a coil 12 arranged around the nozure 11, and a cooling gas pipe 13 for cooling the noznore 11, a first gas pipe 14, a second gas pipe 15, and a third gas pipe 16.
- a chemical solution supply means 5 is disposed around the nozzle 11, and the chemical solution is supplied from the chemical solution inlet 17.
- the plasma torch (plasma source) is configured to apply a high frequency to the coil 12, thereby supplying plasma gas or carrier gas supplied from one or more of the first to third gas pipes 14, 15, 16 into the nozzle. From the supply port at the tip of the nozzle 11 to the plasma. Thus, activated active atoms can be released.
- Patent Documents 1 and 2 describe a plasma torch using an inductively coupled plasma method.
- the inductively coupled plasma method enabled stable supply of high-purity active atoms even under atmospheric pressure. If a microwave supply means is provided in place of the coil 12 in FIG. 2 and plasma is generated by the microwave, the active atom supply means 4 by the microphone mouth plasma method can be configured.
- FIG. 5 is a schematic view of a plasma torch that generates plasma and emits active atoms by a plasma jet method using electrode discharge, which is another embodiment of the active atom supply means 4.
- the plasma torch has an electrode 22 at the center of a nozzle 21 and has a gas pipe 23. Further, a chemical solution supply means 5 is disposed around the nozzle 21, and the chemical solution is supplied from the chemical solution inlet 24.
- the plasma gas supplied from the gas pipe 23 can be turned into plasma, and active atoms activated by the plasma can be emitted from the supply port at the tip of the nozzle 21.
- the processing apparatus of FIG. 1 can simultaneously perform dry treatment with active atoms and wet treatment with a chemical solution, or may perform wet treatment continuously after the dry treatment, or after the wet treatment. Subsequently, dry treatment may be performed.
- the chemical solution supplied from the chemical solution supply means 5 rotates the workpiece 2 so that the entire surface of the workpiece 2 is thinly covered with centrifugal force by the wet treatment. Is done.
- the active atoms supplied from the supply port of the active atom supply means 4 partially dry the thin layer near the supply port and the chemical solution layer, and dry-treat part of the surface of the workpiece 2. Then, the entire surface of the workpiece 2 can be dry-treated by scanning the surface of the workpiece 2 through the supply port of the active atom supply means 4.
- the processing apparatus shown in FIG. 6 is configured such that, in the processing apparatus of FIG. 1, the active atom supply means 4 and the chemical liquid supply means 5 are separately provided and are movable.
- the chemical solution supply means 5 may be fixed as long as the chemical solution can be supplied from the chemical solution supply means 5 to the entire surface of the object to be processed. For example, if a chemical solution is supplied near the rotation center of the workpiece, the chemical solution is supplied to the entire surface of the workpiece by centrifugal force.
- the processing apparatus shown in FIG. 7 is provided with an active atom supply means 4 for a large area, an active atom supply means 4, a workpiece 2, and a chemical solution supply means 5 for supplying a chemical solution from a gap. .
- the active atom supply means 4 for large area has a large area plasma generation source using, for example, a microwave or an electrode, and the supply port faces the surface of the object 2 to be processed. It has an area equal to or larger than the size of 2 and can supply active atoms as a uniform flow.
- the chemical solution supply means 5 is arranged in a different direction from the supply port of the active atom supply means 54. Since the entire surface of the workpiece 2 can be processed at once by the active atom supply means 4 for a large area, the lead time can be greatly reduced. A plurality of chemical solution supply means 5 may be provided to improve the uniformity of the wet process. Further, the active atom supply means 4 may be configured such that the supply port is provided in a line longer than one side of the workpiece 2 and the workpiece 2 is moved so as to be orthogonal to the linear supply port. .
- the processing apparatus shown in FIG. 8 includes a holding means 3a for holding the workpiece 2 to be dry-treated and a holding means 3b for holding the workpiece 2 to be wet-treated in the chamber 11.
- the active atom supply means 4 is arranged above the holding means 3a
- the chemical solution supply means 5 is arranged above the holding means 3b.
- the processing apparatus of FIG. 8 may be provided with a transport means for transporting the workpiece 2 between the holding means 3a and 3b.
- the dry process and the wet process can be continuously performed in the same chamber 11.
- the processing apparatus shown in FIG. 9 is an apparatus capable of processing a plurality of workpieces 2 simultaneously in a batch system, and (A) shows a schematic cross-sectional view and (B) shows a schematic plan view.
- the processing apparatus includes a cleaning tank 31 in the chamber 1, a holding means 3, an active atom supply means 4 above the cleaning tank 31, a chemical discharge pipe 32 and a diffusion plate 33 below the cleaning tank 31, And a chemical supply means that does not.
- the cleaning tank 31 stores a chemical solution supplied from a chemical solution supply unit (not shown), and performs a wet process by immersing the workpiece 2 in the chemical solution. After the wet process, the chemical solution is a chemical solution. It is discharged from the discharge pipe 32.
- the holding means 3 holds the plurality of workpieces 2 upright, and is provided so that the plurality of workpieces 2 can be immersed in the chemical solution in the cleaning tank 31.
- the active atom supply means 4 supplies active atoms from above to the workpiece 2.
- the torch 34 and the matching box 35 are integrated and arranged directly above the cleaning tank 31.
- the liquid level in the cleaning tank 31 is lowered and exposed from the upper side of the object to be processed 2, but the active atoms supplied from the upper side are directed downward, and then proceed to the liquid level or the cleaning tank. While colliding with the bottom surface and reflecting, it circulates in a convection and creates a stream of active atoms inside the cleaning tank.
- the active atoms react with the surface of the object to be treated 2, and the dry treatment can be uniformly performed on the entire object to be treated.
- the diffusing plate 33 assists the formation of the air flow by the active atoms.
- an exhaust means 36 such as a pump may be provided in the chemical liquid discharge pipe 32 so that the chemical liquid is discharged after the wet treatment and can be dried under reduced pressure.
- the evacuation may be stopped and active atoms such as hydrogen atoms may be supplied from above or obliquely from above. .
- active atoms such as hydrogen atoms may be supplied from above or obliquely from above.
- the processing apparatus of the present invention uses the active atom supply means that can supply active atoms under atmospheric pressure, so that the wet processing is performed in the same chamber as the dry processing. Reached.
- the active atom supply means is limited to those capable of supplying active atoms under atmospheric pressure. Although not specified, it is preferable that the active atom can be supplied under atmospheric pressure.
- a processing method by the processing apparatus of the present invention will be described.
- a first processing method a case of using in a resist removing process will be described.
- active atoms containing oxygen atoms or hydrogen atoms were used, and a chemical solution containing heated sulfuric acid was used.
- FIG. 10 (a) is an optical micrograph of the silicon wafer with the resist attached.
- the silicon wafer of FIG. 10 (a) after forming a 1 ⁇ m resist, 5 ⁇ 10 15 pieces / cm 2 of phosphorus were implanted, and the resist surface was thermally cured. This heat-cured resist required about 30 minutes to be removed by a conventional dry process.
- FIG. 10 (b) shows a 100% oxygen gas supplied to the wafer of FIG. 10 (a) at a flow rate of 10 liters per minute using the inductively coupled plasma method at atmospheric pressure. It is an optical micrograph of a silicon wafer after processing with active oxygen atoms supplied by applying high frequency of 40 MHz and 900 W to the coil to generate plasma. The distance from the supply locus of the active atom supply means to the wafer was 2 cm, and the irradiation time was 1 second. From Fig. 10 (b), a pattern processed into silicon was observed, confirming that the resist could be removed.
- FIGS. 11 (a), (b), and (c) are optical micrographs of the silicon wafer after the active oxygen atoms are generated and processed by changing the type of plasma gas.
- Fig. 11 (a) when 100% oxygen gas was used under the same conditions as in Fig. 10 (b), the resist could be removed in 1 second.
- Figure ll (b) shows that the resist could be removed in 5 seconds when a mixed gas of oxygen gas supplied at a flow rate of 3 liters and helium gas supplied at a flow rate of 12 liters per minute was used.
- Figure 11 (c) shows that the resist could be removed in 8 seconds when a mixed gas of oxygen gas supplied at a flow rate of 3 liters and argon gas supplied at a flow rate of 12 liters per minute was used.
- the distance from the supply port of the active atom supply means to the wafer was 2 cm, and plasma was generated by applying high frequencies of 40 MHz and 900 W to the coinore.
- FIGS. 12 (a), (b), and (c) are supplied at a flow rate of 3 liters per minute and an oxygen gas supplied at a flow rate of 12 liters as in FIG. 11 (b).
- This is an optical micrograph of a silicon wafer after processing by changing the distance from the supply port to the wafer when using a gas mixture of helium gas and applying a high frequency of 40 MHz and 900 W to the coin and turning it into plasma.
- Fig. 12 (a) shows the case of processing at a distance of 7 cm, and 60 seconds until a part of the resist surface is removed. It took.
- Figure 12 (b) shows a case where the treatment was performed at a distance of 5 cm, and it took 15 seconds to sufficiently remove the resist surface.
- Figure 12 (c) shows a case where the treatment was performed at a distance of 2 cm, and it took 5 seconds to sufficiently remove the resist surface. From Fig. 12, it was confirmed that the reactive power of the active atom decreased with increasing distance. However, even when the distance is as far as 7 cm, it was shown that the reaction force is sufficient. This is presumably because high-density plasma was generated by the inductively coupled plasma method at atmospheric pressure.
- FIGS. 13 (a), (b), and (c) use a mixed gas of hydrogen gas supplied at a flow rate of 2 liters and helium gas supplied at a flow rate of 12 liters per minute, It is the optical microscope photograph of the silicon wafer after processing by changing the distance from a supply port to a wafer.
- Figure 13 (a) shows the case where the resist was removed at a distance of 7 cm.
- Figure 13 (b) shows a case where the treatment was performed at a distance of 5 cm, and it took 30 seconds to sufficiently remove the resist surface.
- Fig. 13 (c) shows the case of processing at a distance of 3 cm, and it took 10 seconds to sufficiently remove the resist surface. From FIG. 13, it was confirmed that the active hydrogen atom is inferior in reactive stress to the active oxygen atom, but the resist can be removed even with the active hydrogen atom.
- the resist was removed by simultaneously performing dry processing and wet processing in the processing apparatus of FIG.
- a wafer is placed on the holding means 3 and rotated, and active atoms containing oxygen atoms or hydrogen atoms are supplied from the supply port of the active atom supply means 4 (outlet of the torch), and the chemical solution supply means 5 is 120 ° C.
- sulfuric acid was supplied as a chemical solution.
- the moving speed of the supply port of the active atom supply means 4 is slowed so that the active atoms are uniformly supplied to the entire surface of the wafer. It is preferable to do so.
- the heat-cured surface portion of the resist can be quickly removed by dry treatment using active atoms, and the remaining resist can be removed by wet treatment using sulfuric acid.
- the resist was removed and the surface was cleaned by dry cleaning with active oxygen atoms and wet cleaning with sulfuric acid.
- hydrogen peroxide is mixed with sulfuric acid.
- active oxygen atoms are combined with an oxidizing agent. Therefore, it was possible to obtain a sufficient cleaning effect without mixing hydrogen peroxide.
- the lead time can be shortened. It was.
- the resist after the resist was removed by dry treatment using active atoms containing oxygen atoms or hydrogen atoms, finishing etching could also be performed by wet treatment using sulfuric acid. Furthermore, even when the processing apparatus of FIG. 2 was used, the resist could be removed by performing dry processing and wet processing simultaneously or continuously.
- the horizontal axis represents the processing time (seconds), and the vertical axis represents the etching film thickness ( ⁇ m).
- the black circle graph in the figure represents a normal resist film.
- the black square graph in the figure is the result of processing a resist film that was thermally cured by ion implantation.
- FIG. 14 (a) shows a supply locus wafer of active atom supply means using a mixed gas of hydrogen gas supplied at a flow rate of 1 liter and helium gas supplied at a flow rate of 15 liters per minute. It shows the etching amount per unit time under the condition that the distance is 8 cm, that is, the etching rate. From Fig. 14 (a), when active hydrogen atoms are used, both the normal resist film (black circle in the figure) and the cured resist film (black square in the figure) are approximately 0.1. It was confirmed that etching can be performed at an etching rate of ⁇ m / 60 seconds.
- Fig. 14 (b) shows the etching rate under the condition that the oxygen gas supplied at a flow rate of 6 liters per minute is used and the distance from the supply port of the active child supply means to the wafer is 6 cm. Yes. From FIG. 14 (b), the use of active oxygen atoms in the case of ordinary resist film (graph black circles in the figure), and the force cured can be etched with an etching rate of about 1 ⁇ mZ60 second In the case of the resist film (black square graph in the figure), it was confirmed that the etching rate was about 0.02 to 0.03 / im / 60 seconds.
- the etching rate of active oxygen atoms was higher for normal resist films, but the etching rate of active hydrogen atoms was higher for cured resist films.
- active hydrogen atoms For example, a resist film having a hardened surface may be etched by a dry process using active hydrogen atoms, and a normal resist thereunder may be etched by a dry process using active oxygen atoms or a wet process using a chemical solution.
- the etching rate itself can be changed by changing the distance from the supply port of the active atom supply means to the wafer, and even in dry processing using active oxygen atoms. It is possible to remove the hardened resist quickly, or to remove the resist more quickly by dry treatment using active hydrogen atoms.
- the treatment method of the present invention when used for a cleaning process using conventional APM, HPM, SPM, FPM or DHF, active atoms containing oxygen atoms are used, A chemical solution containing ammonium hydroxide, hydrochloric acid or hydrofluoric acid was used.
- the active oxygen atom functions as an oxidizing agent, and the cleaning effect by acid or alkali can be enhanced.
- the supply amount of active oxygen atoms can be controlled by controlling the gas flow rate, a highly accurate cleaning effect can be obtained. For example, a two-step cleaning process is performed using the holding means 3 as shown in FIG.
- the active oxygen atom is supplied from the active atom supply means 4 to the treatment object 2 and the ammonium hydroxide aqueous solution is supplied from the chemical solution supply means 5, so that the active oxygen atoms are supplied.
- the surface was oxidized by removing the oxide film with an aqueous ammonium hydroxide solution to remove particles on the surface.
- the entire holding means 3 is rotated 180 ° to supply active oxygen atoms from the active atom supplying means 4 to the object 2 to be processed 2 at the second processing position 3b, and hydrofluoric acid from the chemical supplying means 5
- the surface is oxidized, the surface is oxidized with active oxygen atoms, and the oxide film is removed with hydrofluoric acid, whereby the surface contaminants can be removed.
- atoms on the surface of the semiconductor are combined with hydrogen atoms to obtain a stable interface state.
- the active hydrogen atoms can reduce a natural oxide film formed on the surface of silicon. If ultrapure water is used as the chemical solution, the silicon surface is exposed by the washing action of ultrapure water, and the surplus hydrogen atoms are bonded to the silicon surface on the surface where the natural oxide film is reduced by hydrogen atoms. The surface is inactivated by covering the silicon surface with hydrogen atoms.
- the active hydrogen atoms are bonded to the exposed silicon surface to obtain a high-quality silicon surface. That is, it is treated with a chemical solution containing active atoms containing hydrogen atoms and hydrofluoric acid.
- a plurality of objects to be processed can be processed in a batch system using the processing apparatus shown in FIG.
- the washing tank 31 in FIG. 9 is filled with DHF, and the holding means 3 holding a plurality of objects to be processed 2 is dipped to perform a wet process.
- active atoms including hydrogen atoms are supplied from the active atom supply means 4 into the chamber 11 while DHF is sucked and discharged from the chemical solution discharge pipe 32 by the exhaust means 34.
- Active hydrogen atoms are supplied to the surface of the workpiece 2 exposed as the liquid level in the cleaning tank 31 descends, and the surface can be inactivated.
- an HF / HNO (1/20) mixed solution is used as a chemical solution for silicon.
- the silicon surface is oxidized with HNO and the oxide film is etched with HF, etc.
- oxygen atoms were supplied and HF was supplied as a chemical solution, the oxygen atoms acted as an oxidant, and silicon etching could be performed.
- etching could be suppressed by supplying an oxygen atom as an oxidizing agent as an active atom.
- the fifth treatment method can also be applied to the step of removing the silicon nitride film.
- a hydrofluoric acid aqueous solution is supplied as a chemical solution to the object to be processed at the first object position 3a to remove the oxide film on the silicon nitride film.
- a cleaning process is performed.
- the holding means 3 is revolved to move the object to be processed to the second processing position 3b, and plasma is generated from the plasma gas containing CF / CHF gas.
- An active atom containing an atomic atom and a hydrogen atom was supplied, a heated chemical solution containing phosphoric acid was supplied, and the silicon nitride film was removed.
- the etching selectivity ratio between the silicon nitride film and the oxide film is 20: 1.
- the holding means 3 is revolved, the object to be treated is moved to the third treatment position 3c, a hydrofluoric acid aqueous solution is supplied as a chemical solution, and hydrogen atoms are supplied as active atoms, so that silicon
- the oxide film underlying the nitride film was removed, the silicon surface was covered with hydrogen atoms by active hydrogen atoms.
- the time required for manufacturing the semiconductor integrated circuit device it was possible to reduce the time conventionally spent 4 hours (in units of 25 sheets) to 1 hour (in units of 25 sheets).
- the reliability of the semiconductor integrated circuit device could be improved.
- FIGS. 1 and FIG. 5 are arranged such that the chemical liquid outlet of the chemical liquid supply means 5 is arranged around the opening of the active atom supply means 4. It becomes a plasma source in which at least a part of the plasma is covered with a liquid curtain.
- the plasma source converts a gas such as argon or helium into plasma at the plasma generation unit.
- the plasma source is used to analyze the workpiece to be processed transferred into the plasma, to treat the surface of the workpiece such as a semiconductor wafer, or to decompose the workpiece such as PCB or chlorofluorocarbon. used.
- the plasma source may have any structure as long as it can generate plasma and can use plasma.
- the plasma source 110 has a torch-like structure, for example, as shown in FIG. 15, and includes a carrier gas cylinder 120, a plasma gas cylinder 112, and a liquid cylinder 122, and a plasma generation unit is provided inside the plasma gas cylinder 112. 116.
- the carrier gas cylinder 120 transfers a sample for analysis, a material such as a surface treatment, and a sample such as a treatment substance into plasma.
- the carrier gas for transporting these samples can be the same or different from the plasma gas.
- liquids, mists and gaseous substances can be transferred into the plasma without using a carrier gas.
- they can be transferred in aerosol form by spraying, etc., vaporized in advance, or transferred in liquid form.
- the plasma source 110 can create plasma that can be used at high atmospheric pressures, such as low atmospheric pressure and atmospheric pressure.
- the plasma includes a state in which most of the plasma is ionized, or a state in which most of the plasma is neutral particles and a portion is ionized.
- the carrier gas cylinder 120, the plasma gas cylinder 112, and the liquid cylinder 122 can be made of a material such as quartz glass or ceramics.
- various gases such as oxygen, hydrogen, nitrogen, methane, chlorofluorocarbon, air, water vapor, or a mixture thereof can be used for the plasma gas and the carrier gas. . (Plasma gas cylinder)
- the plasma gas cylinder 112 is disposed, for example, on the outer periphery of the carrier gas cylinder 120, and forms a plasma generator 116 in a part thereof.
- the plasma gas cylinder 112 is cylindrical, it is arranged concentrically with the carrier gas cylinder 120.
- the plasma gas cylinder 112 transfers the plasma gas to the plasma generator 116.
- the plasma gas is preferably transferred by the plasma generator 116 so as to rotate along the inner wall surface of the cylinder.
- the plasma gas introduction pipe 114 for introducing the plasma gas is arranged in the circumferential tangential direction of the plasma gas cylinder 112 as shown in FIG.
- the gap between the carrier gas cylinder 120 and the plasma gas cylinder 112 is narrowed.
- the portion of the carrier gas cylinder 120 on the plasma generation part 116 side is made thicker, or the carrier gas cylinder 112 may have a large outer diameter although not shown.
- the plasma gas cylinder 112 has an opening 118.
- the opening 118 is provided at the end of the plasma generator 116. The plasma is sent out from the opening 118 to the outside of the plasma generator 116.
- the plasma generator 116 is formed, for example, inside the plasma gas cylinder 112, one end is the end of the carrier gas cylinder 120, and the other end is the opening 118 of the carrier gas cylinder 120.
- the The plasma is exhausted forward from the opening 118.
- the plasma gas cylinder 112 is cooled with a liquid, melting of the plasma gas cylinder 112 can be avoided, so that the plasma generator 116 can be lengthened.
- the sampling depth can be increased and the analysis sensitivity can be increased, and in mass spectrometry, the influence of the secondary discharge that causes a decrease in the analysis sensitivity can be reduced.
- the plasma generation unit 116 is not limited to the force chamber showing the generation chamber inside the plasma gas cylinder 112, and any space can be used as long as it can generate plasma.
- the opening 118 is the first location where the generated plasma moves from that location.
- the liquid cylinder 122 supplies liquid to the periphery of the plasma gas cylinder 112, for example.
- the liquid cylinder 122 is disposed on the outer periphery of the plasma gas cylinder 112.
- the cylinder 122 for liquid is cylindrical, it is concentrically arranged on the plasma gas cylinder 112.
- Liquid The liquid gas is injected from the liquid introduction pipe 124, flows through the space between the liquid cylinder 122 and the plasma gas cylinder 112, and the plasma gas cylinder 112 can be cooled.
- the liquid cylinder 122 is disposed so as to cover the plasma gas cylinder 112. The liquid may be transferred so as to rotate around the outer periphery of the plasma gas cylinder 112.
- the liquid introduction pipe 124 is disposed in the tangential direction of the circumference of the liquid cylinder 122 as shown in FIG. In FIG. 15, it is preferable that the liquid introduction pipe 124 has a direction in which the force extending from the liquid cylinder 122 is different in the same direction as the plasma gas introduction pipe 114 (upward direction in FIG. 15). That is, the liquid introduction pipe 124 and the plasma gas introduction pipe 114 are provided at an appropriate angle with respect to the axis of the casing, and the liquid introduction pipe 124 and the plasma gas introduction pipe 114 are connected so as not to approach each other. It would be easier to connect the piping.
- cleaning chemicals can also be used as the liquid. Cleaning chemicals refer to acids, alkalis, alcohols, fluorocarbon chemicals and aqueous solutions. Alternatively, a gas-liquid two-phase gas and liquid mixture may be used as necessary.
- the liquid supply unit 132 forms a liquid curtain 134 that is a liquid film.
- the liquid curtain 134 covers the plasma formed by the plasma generator 116.
- the liquid curtain 134 can be a kind of chamber.
- the plasma can also be formed in the liquid curtain 134.
- the liquid supply unit 132 can use, for example, the liquid cylinder 122.
- the liquid supply unit 132 has a discharge port 126 at the end of the liquid cylinder 122, that is, in the vicinity of the opening 118 of the plasma generation unit 116.
- the discharge port 126 has a structure that allows liquid to be ejected forward from the liquid cylinder 122. The liquid should be discharged from the outlet 126 while rotating around the axis of the opening 118.
- the liquid supply unit 132 only needs to have a structure in which the plasma is covered with the liquid curtain 134, and thus a configuration in which the liquid cylinder 122 is not used may be employed.
- the liquid supply unit 132 forms the liquid curtain 134 around the plasma, it is possible to prevent unnecessary gas from being mixed into the plasma and to prevent a decrease in the purity of the plasma.
- covering the plasma may encompass the entire periphery of the plasma or may cover a portion of the periphery of the plasma. By covering the plasma in this way, no external need Gas can be prevented from entering the plasma, and the mixing ratio of unnecessary gas can be reduced.
- the liquid curtain 134 may include a case where the liquid curtain 134 is formed of a mist or mist film. As a result, the mixing ratio of unnecessary gas can be reduced.
- FIG. 16 shows a part of the plasma source 110 in which the facing member 136 is disposed to face the plasma generating unit 116.
- the plasma 160 is partly in front of the outside of the plasma generator 116.
- the liquid supply unit 132 ejects liquid toward the facing member 136.
- the liquid supply unit 132 ejects a peripheral force liquid around the opening 118 of the plasma generation unit 116 to form a liquid curtain 134 around the plasma 160.
- the liquid curtain 134 and the opposing member 136 can shield the plasma 160 from the outside air and prevent the unnecessary gas from being mixed into the plasma 160.
- the liquid supply unit 132 may have a double structure.
- the liquid supply unit 132 may have two or more liquid introduction pipes 124. I do not care. Further, two or more kinds of chemicals may be mixed in the liquid supply unit.
- the shape of the outlet 126 plays an important role in the shape of the liquid curtain 134 and the stability of the plasma 160.
- the end of the plasma gas cylinder 112 and the end of the liquid cylinder 122 in FIG. 15 are cut at the same position on the central axis. Thereby, the liquid is discharged to the outside in the axial direction.
- the liquid discharged from the discharge port 126 is subjected to centrifugal force due to rotation around the central axis of the cylinder, surface tension of the liquid, plasma gas pressure, It is considered that the shape of the liquid curtain 134 is determined by the balance of forces such as the external pressure.
- the shape of the liquid curtain 134 can be obtained from the liquid type, flow rate, flow velocity, rotation speed, discharge port shape, etc. in the liquid cylinder 122.
- FIG. 17 shows the structure of the end of the liquid supply unit 132 of the plasma torch.
- the end of the liquid supply unit 132 is composed of a cylindrical end of a plasma gas cylinder 112 and a liquid cylinder 122.
- the end of the liquid supply unit 132 is, for example, a liquid cylinder as shown in FIG.
- the end of the body 122 can be formed so as to protrude from the end of the plasma gas cylinder 112. With this configuration, the liquid curtain 134 is formed along the axial direction.
- FIG. 17 shows the structure of the end of the liquid supply unit 132 of the plasma torch.
- the end of the liquid supply unit 132 is composed of a cylindrical end of a plasma gas cylinder 112 and a liquid cylinder 122.
- the end of the liquid supply unit 132 is, for example, a liquid cylinder as shown in FIG.
- the end of the body 122 can be formed so as to protrude from the end of the plasma gas cylinder 112. With this configuration, the liquid curtain 134 is formed
- the end of the plasma gas cylinder 112 protrudes from the end of the liquid cylinder 122 and can be bent while being inclined in the outer peripheral direction.
- the end portion of the liquid cylinder 122 and the end portion of the plasma gas cylinder 112 can be formed so as to be bent while being inclined in the outer peripheral direction.
- the end of the liquid cylinder 122 protrudes from the end of the plasma gas cylinder 112, and can be formed to bend at a right angle in the inner circumferential direction.
- the end of the plasma gas cylinder 112 can be formed so as to protrude from the end of the liquid cylinder 122.
- FIG. 17E the end of the plasma gas cylinder 112 protrudes from the end of the liquid cylinder 122.
- the end of the liquid cylinder 122 protrudes from the end of the plasma gas cylinder 112, and the end of the liquid cylinder 122 bends while being inclined in the inner peripheral direction. Can be formed.
- the end of the liquid cylinder 122 and the end of the plasma gas cylinder 112 are both bent while being inclined in the outer circumferential direction, and further, the end of the liquid cylinder 122 is The end of the plasma gas cylinder 112 can be formed so as to protrude in parallel with the axis.
- FIGS. 17 (B) to (D), (F) and (G) the deformed end of the plasma gas cylinder 112 can be seen as eaves. The eaves in FIG.
- the shape of the liquid curtain 134 can be formed into an arbitrary shape by changing the shapes of the end portions of the plasma gas cylinder 112 and the liquid cylinder 122 to various shapes.
- the plasma generator 128 turns the plasma gas into a plasma state.
- an induction coil that is a load coil is wound around the outer periphery of the liquid cylinder 122, a high frequency oscillator is connected to the induction coil, and a high frequency is applied to the induction coil.
- the plasma generator 128 can use various methods such as a microwave plasma method using a cavity resonator or the like, and a parallel plate or coaxial electrode method. Electric power for generating plasma can be applied in various forms from direct current to alternating current, high frequency, and microwaves. Further, plasma may be generated by introducing light such as a laser from the outside of the plasma generator. Plasma is flammable gas, flammable liquid, flammable You may generate
- FIG. 18 and 19 show the structures of various plasma sources 110.
- FIG. 18 (A) a plasma gas is allowed to flow from the left to the plasma generator, and a voltage is applied between the electrodes 150 and 150 to form the plasma 160.
- the liquid curtain 134 is formed by the liquid supply unit 132.
- the plasma 160 becomes a plasma jet and flows in the liquid curtain 134 in the right direction. As the plasma 160 goes to the right, neutral particles increase and the number of ionized particles decreases.
- FIG. 18 (B) plasma gas is caused to flow from the left direction to the plasma generating portion, and the plasma 160 is formed by the cavity resonators 152 and 152.
- Plasma 160 is a microwave plasma and flows to the downstream side in the right direction.
- plasma gas is flowed from the left to the plasma generator, plasma 160 is formed by the coaxial electrodes 154 and 154, and a mesh or mesh electrode 156 is disposed near the opening 118 of the plasma generation chamber 116.
- Plasma 160 is coaxial plasma and flows downstream in the right direction.
- plasma gas is allowed to flow from the left to the plasma generator, and plasma 160 is formed by the parallel plate electrodes 150 and 150.
- the plasma 160 is a parallel plate plasma.
- plasma gas is caused to flow from the left direction to the plasma generating portion, and the plasma 160 is formed by the electrode 150 of the plasma needle and the cylindrical electrode 150.
- the acicular electrode 150 is fixed inside the insulator 158.
- FIG. 18 (F) plasma gas is allowed to flow from the left direction to the plasma generator, and plasma 160 is formed by laser 60.
- FIG. 18 (G) a continuous liquid target 62, which is a continuous liquid beam from the left direction, is caused to flow through the plasma generation unit, and a plasma 160 is formed by the laser 60.
- an intermittent liquid target 64 which is liquid particles, is intermittently flowed from the left direction to the plasma generating portion, and a plasma 160 is formed by the laser 60.
- FIG. 18 (1) a solid solid target 66 is supplied from the left direction, and a plasma 160 is formed by a laser 60 in the plasma generation unit.
- the fuel is supplied from the left and the combustion plasma 162 is formed by the flame.
- the sample gas or mist can be flowed from the left to the plasma generation part.
- combustible liquids and solids such as gasoline can be ejected or sprayed and burned.
- FIG. 19 (A) shows a plasma in which the liquid curtain 134 is formed even when the plasma 160 force is far away.
- Ma source 110 is shown.
- the liquid curtain 134 may be formed so as to surround the periphery of the plasma generator 128 that is not integrated with the plasma 160.
- FIG. 19B another gas, liquid, or liquid mist 130 is caused to flow through the plasma 160 by the gas mist gas supply unit 300 in the space between the liquid curtain 134 and the plasma 160.
- gas, mist, liquid, another plasma, and the like are supplied by the plasma gas introduction pipe 114 and the gas mist gas supply unit 300 of another nozzle.
- the liquid curtain 134 is used as a kind of chamber, and the plasma 160 is formed inside the liquid curtain 134 by the coil of the plasma generator 128.
- FIG. 20 shows an embodiment in which water is ejected from the discharge port 126 of the liquid cylinder 122 toward the bottom of the bottle to form the liquid force tenn 134.
- the liquid curtain 134 ejected from the liquid cylinder 122 reaches the water surface at the bottom of the tub.
- the embodiment of FIG. 20 is an example in which no gas is introduced from the plasma generator 116.
- the liquid curtain 134 has a shape that once spreads around the discharge port 126 and converges again. In this phenomenon, water is rotated along the inner periphery of the liquid cylinder 122. Therefore, the water ejected from the discharge port 126 spreads in the outer peripheral direction due to the centrifugal force of rotation, and then the water is tensioned by the surface tension of the water.
- the flow rate of water was 3.3 L (liter) / min.
- FIG. 21 is similar to FIG. 20, in which water is ejected from the discharge port 126 of the liquid cylinder 122 to form the liquid curtain 134.
- the force is generated from the plasma generator 116 to the inside of the liquid curtain 134.
- the example which introduces a suitsa or gas is shown.
- the liquid curtain 134 in FIG. 21 has a shape in which the end is expanded like a bell, and reaches the water surface at the bottom of the rod. Once the liquid curtain 134 in FIG. 21 spreads in the outer peripheral direction, it retains the shape that spreads in the shape of a bell even if the gas supply is stopped. This phenomenon is thought to indicate that the gas is trapped in the liquid curtain 134 and the surface of the tub.
- FIG. 22 shows a processing apparatus 140 using the plasma source 110.
- the processing apparatus 140 processes a workpiece 144 such as a silicon wafer, and includes a chamber 146 and a holding unit 142 that holds the plasma source 110 and the workpiece 144 in the chamber 146.
- the plasma source 110 transfers the plasma 160 from the plasma generation unit 116 to the outside of the front and covers the external plasma 160 with a liquid force of 134.
- the plasma 160 treats the surface of the object 144 such as resist removal.
- the type of plasma gas is determined according to the workpiece 144 and the processing content.
- the liquid can be a chemical for the treatment, and the type of the chemical is determined according to the processing content.
- the chemical solution may be injected into the processing target 144 by an independent chemical solution injection device 148 instead of the liquid supply unit 132.
- an independent chemical solution injection device 148 is used as described above, the degree of freedom of the processing step is increased, and the dry treatment using the plasma 160 and the wet treatment using the chemical solution can be performed simultaneously, in parallel, or in time series. .
- the holding unit 142 holds the workpiece 144, and rotates the workpiece 144 around the rotation axis as necessary.
- the plasma source 110 is disposed to face the object to be processed 144, and can perform a separation motion and an approaching motion relative to the object to be processed 144.
- the plasma source 110 can perform a relatively parallel movement with a constant interval with respect to the workpiece 144. By this movement, it is possible to perform plasma treatment on a large workpiece 144 and chemical treatment.
- Plasma source 11 can use all of plasma, gas, liquid, and mist, or can use two or three of these interactions.
- the plasma source 110 can also use plasma, gas, liquid, and mist simultaneously or alternately.
- the plasma source 110 forms only the liquid curtain 134 with the plasma 160 not ignited, introduces another gas or mist into the liquid curtain 1 34, or cools the sample with the liquid curtain 134.
- Today the plasma source 110 is used in a processing method, various processes are possible.
- Plasma source 11 can use all of plasma, gas, liquid, and mist, or can use two or three of these interactions.
- the plasma source 110 can also use plasma, gas, liquid, and mist simultaneously or alternately.
- the plasma source 110 forms only the liquid curtain 134 with the plasma 160 not ignited, introduces another gas or mist into the liquid curtain 1 34, or cools the sample with the liquid curtain 134.
- Today the plasma source 110 is used in a processing method.
- FIG. 23 illustrates a processing method for the workpiece 144.
- the plasma source 110 and the holding part 14 2 are arranged in the chamber 146.
- the workpiece 144 is placed on the holding portion 142 and fixed (Sl).
- the plasma source 110 is arranged to face the workpiece 144 (S2).
- the holding part 142 is rotated (S3).
- the plasma 160 is covered with a liquid curtain 134 (S4). This prevents unnecessary gases such as outside air from being mixed into the plasma 160.
- Surface treatment of the workpiece 144 is performed with the plasma 160 and the chemical solution (S5). For this surface treatment, dry treatment with plasma 160 and wet treatment with chemicals can be performed simultaneously, in parallel, or in time series.
- Mass spectrometry is performed using, for example, the plasma source 110 and a sampler and a mass spectrometer (not shown).
- the mass spectrometry method is carried out by transporting the sample object to be analyzed to the plasma generator 116 on a carrier gas.
- the plasma gas is introduced into the plasma generation unit 116 while rotating in the plasma gas cylinder 112 through the plasma gas introduction pipe 114.
- a part of the plasma gas is converted into plasma by the plasma generator in the plasma generator 116.
- the sample is transported into the plasma generation unit 116, it is activated by the plasma, and is discharged forward from the opening 118 of the plasma generation unit 116 together with the plasma.
- the sample is mainly discharged from the opening 118 while being present at the center of the cylindrical shape of the plasma generator 116, so that it passes through the hole of the sampler and goes to the mass spectrometer for mass analysis. . Most of the gas and plasma in the plasma generator 116 are blocked by the sampler and discharged in the outer circumferential direction.
- the liquid cools the plasma gas cylinder 112 and is discharged in the outer peripheral direction to form a liquid curtain 134.
- the liquid curtain 134 prevents unwanted gases from entering the plasma.
- the spectroscopic analysis is performed using, for example, the plasma source 110 and a condensing device such as a lens and a spectroscopic analysis device (not shown).
- the spectroscopic device is mainly disposed on the side of the plasma source 110, collects light emitted from the sample to-be-processed in the plasma, and performs spectroscopic analysis.
- the spectroscopic analysis method is performed by placing a sample to be analyzed on a carrier gas and transporting it to the plasma generator 116. At that time, the plasma gas is introduced into the plasma generator 116 while rotating in the plasma gas cylinder 112 through the plasma gas introduction pipe 114, and a part of the plasma gas is converted into plasma by the plasma generator 128 in the plasma generator 116. .
- the sample When the sample is transported into the plasma generator 116, the sample is activated by the plasma, and is discharged forward from the opening 118 of the plasma generator 116 together with the plasma.
- the sample is mainly present at the center of the cylindrical shape of the plasma generation unit 116, and is emitted outside through the opening 118 while generating unique light. Even when the sample is discharged, the sample exists with the plasma gas for a predetermined period while generating unique light outside the plasma generation unit 116. Therefore, the light unique to the sample is collected by the condensing device and sent to the spectroscopic analyzer for spectroscopic analysis.
- the liquid cools the plasma gas cylinder 112 and is discharged in the outer peripheral direction to become a liquid curtain 134.
- the liquid curtain 134 prevents unwanted gases from entering the plasma.
- the plasma source 110 can decompose a substance such as PCB or chlorofluorocarbon. By mixing the substance to be processed into the carrier gas or plasma gas and introducing it into the high temperature plasma, the substance can be decomposed and rendered harmless.
- the liquid cools the plasma gas cylinder 112 and is discharged in the outer peripheral direction to form a liquid curtain 134.
- the liquid curtain 134 can prevent unwanted gases from entering the plasma.
- the plasma is surrounded by the liquid curtain 134 and the gas is shut off, so that high-purity treatment can be performed in the atmosphere.
- the sample can be cooled easily and simply, and the wet treatment and the dry treatment can be performed continuously, simultaneously, or in time series on the workpiece.
- the plasma gas used can be reduced, the plasma can be stabilized, the plasma torch can be lengthened, and the shape of the cooling torch can be made simple and inexpensive. You can get power S.
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800007437A CN101331594B (zh) | 2006-06-22 | 2007-04-20 | 处理装置、处理方法及等离子源 |
EP07742028A EP2031646A4 (en) | 2006-06-22 | 2007-04-20 | TREATMENT DEVICE, TREATMENT METHOD AND PLASMA SOURCE |
US11/919,713 US20100055915A1 (en) | 2006-06-22 | 2007-04-20 | Processing apparatus, processing method, and plasma source |
KR1020077022532A KR100932053B1 (ko) | 2006-06-22 | 2007-04-20 | 처리장치, 처리방법 및 플라즈마원 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2006-172388 | 2006-06-22 | ||
JP2006172388 | 2006-06-22 | ||
JP2006196931A JP2008027657A (ja) | 2006-07-19 | 2006-07-19 | プラズマ源、処理装置及び処理方法 |
JP2006-196931 | 2006-07-19 |
Publications (1)
Publication Number | Publication Date |
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WO2007148470A1 true WO2007148470A1 (ja) | 2007-12-27 |
Family
ID=38833213
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/058593 WO2007148470A1 (ja) | 2006-06-22 | 2007-04-20 | 処理装置、処理方法及びプラズマ源 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100055915A1 (ja) |
EP (1) | EP2031646A4 (ja) |
KR (1) | KR100932053B1 (ja) |
CN (1) | CN101331594B (ja) |
TW (1) | TW200802587A (ja) |
WO (1) | WO2007148470A1 (ja) |
Cited By (3)
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US20110215071A1 (en) * | 2010-03-03 | 2011-09-08 | Veeco Instruments Inc. | Wafer carrier with sloped edge |
JP2021051123A (ja) * | 2019-09-24 | 2021-04-01 | 株式会社Screenホールディングス | 基板処理方法および基板処理装置 |
WO2023188121A1 (ja) * | 2022-03-30 | 2023-10-05 | ヤマハロボティクスホールディングス株式会社 | ウェーハ洗浄装置及びボンディングシステム |
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DE102011015263B4 (de) * | 2010-03-26 | 2014-07-24 | Hq-Dielectrics Gmbh | Vorrichtung und Verfahren zum Behandeln von Substraten |
KR20120064364A (ko) * | 2010-12-09 | 2012-06-19 | 삼성전자주식회사 | 태양 전지의 제조 방법 |
DE102011100057A1 (de) * | 2011-04-29 | 2012-10-31 | Centrotherm Thermal Solutions Gmbh & Co. Kg | Vorrichtung und verfahren zum behandeln von substraten mit einem plasma |
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CN104779136A (zh) * | 2014-01-10 | 2015-07-15 | 上海和辉光电有限公司 | 一种去除光致抗蚀剂的方法和设备 |
CN105514023B (zh) * | 2014-09-22 | 2018-07-24 | 上海和辉光电有限公司 | 一种接触孔界面处理方法 |
CN109308987A (zh) * | 2017-07-26 | 2019-02-05 | 东芝存储器株式会社 | 等离子体处理装置、半导体制造装置及半导体装置的制造方法 |
JP6985417B2 (ja) * | 2017-12-18 | 2021-12-22 | 積水化学工業株式会社 | 表面処理方法及び装置 |
KR102619877B1 (ko) * | 2019-09-11 | 2024-01-03 | 삼성전자주식회사 | 기판 처리 장치 |
JP7407607B2 (ja) * | 2020-01-31 | 2024-01-04 | 株式会社Screenホールディングス | プラズマ発生装置および基板処理装置 |
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Also Published As
Publication number | Publication date |
---|---|
EP2031646A1 (en) | 2009-03-04 |
CN101331594B (zh) | 2012-03-28 |
TW200802587A (en) | 2008-01-01 |
EP2031646A4 (en) | 2012-05-30 |
CN101331594A (zh) | 2008-12-24 |
KR100932053B1 (ko) | 2009-12-15 |
KR20080027457A (ko) | 2008-03-27 |
US20100055915A1 (en) | 2010-03-04 |
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