WO2011010660A1 - 成膜装置及び成膜方法 - Google Patents
成膜装置及び成膜方法 Download PDFInfo
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- WO2011010660A1 WO2011010660A1 PCT/JP2010/062242 JP2010062242W WO2011010660A1 WO 2011010660 A1 WO2011010660 A1 WO 2011010660A1 JP 2010062242 W JP2010062242 W JP 2010062242W WO 2011010660 A1 WO2011010660 A1 WO 2011010660A1
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- processing container
- gas
- film forming
- film
- forming apparatus
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Classifications
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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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02612—Formation types
- H01L21/02617—Deposition types
- H01L21/0262—Reduction or decomposition of gaseous compounds, e.g. CVD
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/40—Oxides
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/40—Oxides
- C23C16/406—Oxides of iron group metals
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/4401—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber
- C23C16/4404—Coatings or surface treatment on the inside of the reaction chamber or on parts thereof
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45523—Pulsed gas flow or change of composition over time
- C23C16/45525—Atomic layer deposition [ALD]
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28512—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table
- H01L21/28556—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table by chemical means, e.g. CVD, LPCVD, PECVD, laser CVD
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- 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
- H01L21/683—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 for supporting or gripping
- H01L21/687—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
- H01L21/68742—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by a lifting arrangement, e.g. lift pins
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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
- H01L21/683—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 for supporting or gripping
- H01L21/687—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
- H01L21/68785—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 for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by the mechanical construction of the susceptor, stage or support
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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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76843—Barrier, adhesion or liner layers formed in openings in a dielectric
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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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76853—Barrier, adhesion or liner layers characterized by particular after-treatment steps
- H01L21/76855—After-treatment introducing at least one additional element into the layer
Definitions
- the present invention relates to a film forming apparatus and a film forming method for forming a thin film such as a manganese (Mn) containing film as a barrier / seed film on the surface of an object to be processed such as a semiconductor wafer.
- a thin film such as a manganese (Mn) containing film as a barrier / seed film
- tantalum metal Ti
- tantalum nitride film TiN
- a thin seed film made of a copper film is formed on the entire wafer surface including the entire wall surface in the recess in the plasma sputtering apparatus, and then the copper plating process is performed on the entire wafer surface. Is given. Thereby, the inside of the recess is completely filled. Thereafter, excess copper thin film on the wafer surface is removed by polishing by CMP (Chemical Chemical Polishing) or the like.
- a self-formed barrier layer using a Mn film or a CuMn alloy film instead of the Ta film or TaN film has attracted attention (Japanese Patent Laid-Open No. 2005-277390).
- a Mn film or CuMn alloy film is formed by sputtering, and the Mn film or CuMn alloy film itself becomes a seed film.
- a Cu plating layer can be directly formed thereon, and by annealing after plating, it reacts with the SiO 2 layer, which is a lower insulating film, in a self-aligned manner, and this SiO 2 layer and the Mn film or CuMn alloy film
- a barrier film such as a MnSi x O y (x, y: any positive integer) film or a manganese oxide MnO x (x: any positive integer) film is formed at the boundary portion. That is, there is an advantage that the number of manufacturing steps can be reduced.
- the present invention has been devised to pay attention to the above problems and to effectively solve them.
- the objective of this invention is providing the film-forming apparatus and film-forming method which can suppress that a deposit adheres to the surface of the member exposed to the atmosphere in a processing container.
- the present invention relates to a member exposed to the atmosphere in a processing container in a film forming apparatus in which a thin film is formed on the surface of an object to be processed using an organometallic source gas in a processing container that can be evacuated.
- the film forming apparatus is characterized in that a hydrophobic layer is provided on the surface.
- hydrophobic layer is provided on the surface of the member exposed to the atmosphere in the processing container, it is possible to effectively suppress deposits from adhering to the surface of the member.
- the present invention provides a film forming apparatus in which a thin film is formed on the surface of an object to be processed using an organic metal source gas and an oxygen-containing gas in a processing container that can be evacuated.
- the film forming apparatus is characterized in that a hydrophobic layer is provided on the surface of a member exposed to the atmosphere inside.
- hydrophobic layer is provided on the surface of the member exposed to the atmosphere in the processing container, it is possible to effectively suppress deposits from adhering to the surface of the member.
- the member includes the processing container, a shower head unit that introduces gas into the processing container, a mounting table structure that supports the processing object, and the processing object is carried out into the processing container.
- a gate valve that is opened and closed when entering is included.
- the hydrophobic layer is also formed inside the exhaust pipe connected to the processing vessel.
- the hydrophobic layer is composed of one layer selected from the group consisting of a SiOC layer, a fluorine resin layer, and a hydrophobized silicon layer.
- the metal contained in the organometallic source gas is Mn, Nb, Zr, Cr, V, Y, Pd, Ni, Pt, Rh, Tc, Al, Mg, Sn, Ge, Ti, or Re.
- the present invention provides a film forming method in which a thin film is formed on the surface of an object to be processed using an organic metal source gas in a processing container that can be evacuated, and the object to be processed is accommodated in the processing container.
- a hydrophobic process in which the surface of the processing container is hydrophobized by flowing a hydrophobizing gas in a state where the thin film is not formed, and the thin film is formed by flowing the organometallic source gas in a state in which the object to be processed is accommodated in the processing container And a thin film forming step.
- the present invention provides a method for forming a thin film on the surface of an object to be processed using an organic metal source gas in a processing container that can be evacuated.
- a silicon layer forming step for forming a silicon layer on the surface in advance, a hydrophobizing step for hydrophobizing the surface of the silicon layer by flowing a hydrophobizing gas without containing the object to be processed into the processing container, and the processing A thin film forming step of forming the thin film by flowing the organometallic raw material gas in a state in which the object to be processed is accommodated in a container.
- the surface of the silicon layer is hydrophobized so that deposits can be effectively suppressed from adhering to the surface.
- the hydrophobizing gas is HF (hydrofluoric acid), HMDS (Hexamethyldisilazane), TMDS (1,1,3,3-Tetramethyldisilazane), TMSDMA (Dimethylaminotrimethylsilane), DMSDMA (Dimethylsilyldimethylamine), TMMAS (Trimethylmethylaminosilane), TMICS.
- TMSA Trimethyl (isocyanato) silane
- TMSA Trimethylsilylacetylene
- TMSC Trim ethylsilylcyanide5
- 1,3,5,7-tetramethylcyclotetrasiloxane dimethylsilane, tetraethylcyclotetrasiloxane, 1,2,3- Triethyl-2,4,6-trimethylcyclotrisilazane, 1,2,3,4,5,6-hexamethylcyclotrisilazane, monomethylsilane, hexamethyldisilane, hexamethylsiloxane, trimethylsilane, tetramethylsilane, dimethyl Dimethoxysila , Octamethylcyclotetrasiloxane, trimethoxymethylsilane, hexaethyldisilazane, hexaphenyldisilazane, heptamethyldisilazane, dipropyl
- FIG. 1 is a configuration diagram showing an example of a film forming apparatus according to the present invention.
- FIG. 2 is a partially enlarged sectional view showing a hydrophobic layer formed on the surface of each member of the film forming apparatus.
- 3A and 3B are process diagrams showing an example of the hydrophobization treatment.
- FIG. 4 is a graph showing experimental results for evaluating the film thickness of a film deposited on the hydrophobic layer used in the film forming apparatus of the present invention.
- FIG. 5 is a flowchart showing an example of the film forming method of the present invention.
- FIG. 1 is a configuration diagram illustrating an example of a film forming apparatus according to the present invention
- FIG. 2 is a partial enlarged cross-sectional view illustrating a hydrophobic layer formed on the surface of each member of the film forming apparatus of FIG.
- FIG. 3 is a process diagram showing an example of the hydrophobization treatment.
- the film forming apparatus is an apparatus for forming a Mn-containing film as a thin film using an organometallic source gas and an oxygen-containing gas.
- an oxygen-containing gas a case where water vapor (H 2 O) is used as the oxygen-containing gas will be described as an example.
- the film forming apparatus 2 includes a processing vessel 4 made of aluminum or aluminum alloy having an inner cross-section made substantially circular, for example.
- a shower head portion 6 which is a gas introduction means for introducing a necessary gas, for example, a film forming gas, is provided on the ceiling portion in the processing container 4.
- gases necessary for film formation are ejected toward the processing space S from a large number of gas ejection holes 10A and 10B provided on the gas ejection surface 8 on the lower surface.
- gas diffusion chambers 12A and 12B divided into two hollow shapes are formed.
- the processing gas introduced into the gas diffusion chambers 12A and 12B is diffused in the plane direction and then blown out from the gas injection holes 10A and 10B respectively connected to the gas diffusion chambers 12A and 12B. That is, the gas injection holes 10A and 10B are arranged in a matrix, and the gases injected from the gas injection holes 10A and 10B are mixed in the processing space S.
- the entire shower head portion 6 is made of, for example, a nickel alloy such as nickel or Hastelloy (registered trademark), aluminum, or an aluminum alloy.
- a structure mode in which only one gas diffusion chamber is used as the shower head unit 6 may be employed.
- a sealing member 14 made of, for example, an O-ring or the like is interposed at the joint between the shower head unit 6 and the upper end opening of the processing container 4 so that the airtightness in the processing container 4 is maintained.
- a loading / unloading port 16 is provided for loading or unloading the semiconductor wafer W as an object to be processed into the processing container 4.
- the carry-in / out port 16 is provided with a gate valve 18 that can be opened and closed in an airtight manner.
- the exhaust space 22 is formed in the bottom 20 of the processing container 4. Specifically, a large opening 24 is formed at the center of the container bottom 20, and a cylindrical partition wall 26 having a bottomed cylindrical shape that extends downward is connected to the opening 24. The interior of 26 forms (partitions) the exhaust space 22.
- the mounting base structure 30 is provided in the bottom part 28 of the cylindrical partition wall 26 so that it may stand up from this. Specifically, the mounting table structure 30 is capable of mounting a cylindrical column 32 standing up from the bottom 28 and a semiconductor wafer W as an object to be processed fixed on the upper end of the column 32.
- the main mounting table 34 is mainly configured.
- the mounting table 34 is made of, for example, a ceramic material, quartz glass, or aluminum (including an alloy).
- a resistance heater 36 made of, for example, a carbon wire heater that generates heat by energization is accommodated as a heating means. Thereby, the semiconductor wafer W mounted on the upper surface of the mounting table 34 can be heated.
- a plurality of, for example, three pin insertion holes 38 are formed in the mounting table 34 so as to penetrate in the vertical direction (only two are shown in FIG. 1).
- a push-up pin 40 inserted in a loosely fitted state so as to be movable up and down is disposed.
- a push-up ring 42 made of ceramics such as alumina formed in a circular ring shape is arranged. That is, the lower end of each push-up pin 40 is supported by the push-up ring 42.
- the arm portion 44 extending from the push-up ring 42 is connected to a retracting rod 46 provided through the container bottom portion 20.
- the retractable rod 46 can be moved up and down by an actuator 48.
- the push-up pins 40 can be projected and raised upward from the upper ends of the pin insertion holes 38.
- an extendable bellows 50 is interposed in the penetration portion of the bottom of the container of the retractable rod 46 so that the retractable rod 46 can be raised and lowered while maintaining the airtightness in the processing container 4.
- the opening 24 on the inlet side of the exhaust space 22 is set to be smaller than the diameter of the mounting table 34, and the gas flowing down outside the peripheral edge of the mounting table 34 circulates below the mounting table 34 before opening 24.
- An exhaust port 52 is formed in the lower side wall of the cylindrical partition wall 26 so as to face the exhaust space 22.
- a vacuum exhaust system 54 is connected to the exhaust port 52.
- the vacuum exhaust system 54 has an exhaust passage 56 composed of an exhaust pipe 110 connected to the exhaust port 52.
- the exhaust passage 56 has a pressure adjusting valve 58, a vacuum pump 60, a detoxifying device (not shown). ) Etc. are inserted sequentially.
- a rubber heater 112 or the like is wound around the exhaust pipe 110 so as to be heated to a predetermined temperature.
- the side wall of the processing vessel 4, the side wall of the shower head unit 6, the side wall of the cylindrical partition wall 26, and the bottom portion 28 of the cylindrical partition wall 26 have a predetermined temperature, for example, 80 ° C. so that the source gas does not re-liquefy.
- cartridge heaters 62, 64, 114, and 116 are embedded as heating means for maintaining them.
- the shower head unit 6 is supplied with a raw material gas supply means 66 for supplying a raw material gas to supply a predetermined gas, and an oxygen-containing gas for supplying, for example, water vapor (H 2 O) as an oxygen-containing gas.
- a gas supply means 68 is connected.
- the source gas supply means 66 has a source gas flow path 72 connected to the gas inlet 70 of one gas diffusion chamber 12A of the two gas diffusion chambers.
- the raw material gas flow path 72 is connected to a first raw material source 78 that accommodates the first raw material, with an on-off valve 74 interposed therebetween.
- a flow rate controller 76 such as a mass flow controller for adjusting the flow rate of the bubbling gas is installed in the source gas channel 72 upstream of the first source source 78.
- an organometallic raw material containing a metal is used as the first raw material.
- the raw material is gasified by bubbling with an inert gas such as Ar gas whose flow rate is controlled, and the organometallic raw material gas can be supplied along with the inert gas.
- the first raw material source 78 is heated by a heater or the like (not shown) in order to increase the vapor pressure of the raw material.
- the organometallic raw material for example, (EtCp) 2 Mn (precursor: cyclopentadienyl manganese) containing manganese is stored in the first raw material source 78 in a liquid state.
- an inert gas for bubbling other rare gases such as He and Ne, N 2 or H 2 can be used instead of Ar gas.
- a tape heater 80 is wound around the raw material gas flow path 72 and the on-off valve 74 interposed therewith to prevent the raw material gas from being liquefied again. It is supposed to be heated.
- a plurality of raw material gas supply means may be installed according to the raw material to be used.
- the oxygen-containing gas supply means 68 has a gas flow path 84 connected to the gas inlet 82 of the other gas diffusion chamber 12B.
- the gas flow path 84 is connected to a water vapor source 90 that generates water vapor while an on-off valve 86 and a flow rate controller 88 such as a mass flow controller are sequentially provided on the way.
- the water vapor source 90 is composed of a water storage tank, for example.
- the water storage tank is maintained at, for example, about 40 ° C. by a temperature controller 92, for example, and generates water vapor by increasing the vapor pressure.
- a tape heater 94 is wound around the gas flow path 84 and the on-off valve 86 or the flow rate controller 88 interposed in the gas flow path 84 in order to prevent the water vapor from being reliquefied. It is heated to 80 ° C.
- the source gas is introduced into the gas diffusion chamber 12 ⁇ / b> A located above the shower head unit 6, and the oxygen-containing gas (water vapor) is introduced into the gas diffusion chamber 12 ⁇ / b> B located below the shower head unit 6.
- the temperature of the gas ejection surface 8 tends to increase because the shower head unit 6 faces and is close to the mounting table 34. That is, when the source gas is introduced into the lower gas diffusion chamber 12B, the source gas may be decomposed.
- an inert gas supply means for purging is connected to the shower head unit 6 so that purge gas is supplied as necessary.
- an inert gas such as N 2 gas, Ar gas, He gas, or Ne gas can be used.
- the hydrophobic layer 96 which is the characteristics of this invention is provided in the surface of the member exposed to the atmosphere in the processing container 4.
- the member corresponds to the processing container 4, the shower head unit 6, the mounting table structure 30, the gate valve 18, and the like. That is, the inner surface of the processing container 4 (including the inner surface of the cylindrical partition wall 26), the lower surface of the shower head unit 6, each surface of the mounting table 34, each surface of the column 32, the inner surface of the gate valve 18, and the like. And the surface directly exposed to the atmosphere in the processing container 4 corresponds. And the hydrophobic layer 96 is provided in those surfaces. The situation at this time is shown in FIG. That is, the hydrophobic layer 96 is provided on the surface of each member typified by the processing container 4 and the like. The surface of the hydrophobic layer 96 is hydrophobic.
- hydrophobic layer 96 deposits are suppressed from adhering to each surface of the hydrophobic layer 96.
- the hydrophobic layer 96 is provided on the inner surface of the exhaust pipe 110 connected to the processing container 4, and the inner walls and inner structures of the pressure regulating valve 58 and the vacuum pump 60.
- the hydrophobic layer 96 a SiOC layer, a fluorine resin layer, a lubricated alumite, a hydrophobic heat resistant paint, or a hydrophobized silicon layer can be used.
- a hydrophobic layer 96 is formed with a thickness of about 0.01 to 5 mm, for example.
- the SiOC layer the SiOC material itself is hydrophobic.
- a SiOC material having a dense inside, or a SiOC material having a porous inside can be used.
- black diamond registered trademark
- Aurora ⁇ ULK registered trademark
- the fluorine resin material itself has hydrophobicity.
- Teflon registered trademark
- Lubricated alumite is a hard alumite film with fine pores filled with fatty acid such as oleic acid, graphite or Teflon resin (fluorine resin), and adsorbed fine particles of PTFE (polytetrafluoroethylene). Including anodized.
- the silicon layer is formed on the surface of each member such as the processing container 4 by, for example, silicon spraying.
- the surface of the silicon layer 100 is terminated with —OH group which is a hydrophilic group.
- the hydrophobic layer 96 is formed to be hydrophobic.
- HMDS hexamethyldisilazane
- the —OH group on the surface of the silicon layer 100 is replaced with the —H group, and hydrogen is terminated. Thereby, hydrophobicity is exhibited.
- the —OH group on the surface of the silicon layer 100 reacts with the HMDS to be silylated to attach Si and three methyl groups. Thereby, hydrophobicity is exhibited.
- R1, R2, and R3 shown in FIG. 3B are not limited to methyl groups, but may be alkyl groups.
- the hydrophobic layer 96 described above is selective to the surface that is exposed to the atmosphere in the processing container 4 after assembly before the film forming apparatus 2 is assembled, that is, when each member is in the state of a part. It is preferable to be formed.
- a control means 102 composed of, for example, a computer is provided.
- the control means 102 controls the start and stop of the supply of each gas, controls the supply amount of each gas, controls the pressure in the processing container 4, controls the temperature of the wafer W, and the like.
- the control unit 102 includes a storage medium 104 and a user interface 106 in which a computer program for performing the above-described control is stored.
- the storage medium 104 for example, a flexible disk, a flash memory, a hard disk, a CD (Compact Disc), or the like can be used.
- the user interface 106 includes a keyboard for an operator to input / output commands for managing the film forming apparatus 2, a display for visualizing and displaying the operating status of the film forming apparatus 2, and the like.
- the operation of the film forming apparatus 2 configured as described above will be described.
- the surface of the unprocessed semiconductor wafer W is covered with an insulating layer such as an interlayer insulating film, while a contact hole, a via hole, or a trench such as a wiring groove reaching the lower wiring layer is formed in advance. ing.
- Such a wafer W is carried into the processing container 4 through the gate valve 18 and the carry-in / out port 16 which are held by a carrying arm (not shown) and opened. Then, the wafer W is transferred to the raised push-up pins 40. As the push-up pins 40 are lowered, the wafer W is mounted on the upper surface of the mounting table 34.
- the raw material gas supply means 66 and the oxygen-containing gas supply means 68 are operated, and each predetermined gas is supplied to the shower head unit 6 while the flow rate is controlled, and each gas is injected from the gas injection holes 10A and 10B. And introduced into the processing space S.
- these gases There are various supply modes of these gases, as will be described later.
- Mn-containing source gas and water vapor are supplied.
- the atmosphere in the processing container 4 and the exhaust space 22 is evacuated. And the valve opening degree of the pressure regulating valve 58 is adjusted, and the atmosphere of the processing space S is maintained at a predetermined process pressure.
- the temperature of the wafer W is heated by the resistance heater 36 provided in the mounting table 34 and maintained at a predetermined process temperature.
- the process temperature of the wafer W is about 200 ° C.
- the shower head unit 6 and the processing container 4 are heated to a temperature at which the Mn source gas does not re-liquefy, for example, about 80 ° C.
- a desired thin film is formed on the surface of the semiconductor wafer W.
- a Mn-containing film is formed on the surface of the wafer W as a thin film.
- This Mn-containing film is specifically a MnOx film (manganese oxide film), and in some cases MnSixOy reacted with the base.
- the gas supply mode in this case as shown in Japanese Patent Application Laid-Open No. 2009-016782, for example, a method of supplying a Mn-containing source gas and water vapor simultaneously to form a thin film by a thermal CVD method;
- ALD atomic Layered Deposition
- a source gas and water vapor are alternately and repeatedly supplied to repeat a source gas adsorption step and a reaction step.
- Either supply mode film formation method
- thin films having a thickness of atomic level or molecular level can be repeatedly stacked one by one by alternately performing the adsorption of the source gas and the reaction by the supply of water vapor.
- the source gas or water vapor is exposed to the atmosphere in the processing container. It adheres to the surface of the member, for example, the inner surface of the processing vessel, the gas injection surface of the shower head, the surface of the mounting table, the inner surface of the gate valve, etc. There was a tendency.
- the surface of the member exposed to the atmosphere in the processing container 4 that is, the inner surface of the processing container 4 or the gas jet of the shower head unit 6 is used. Since the hydrophobic layer 96 is provided on the surface of the mounting table structure 30 including the surface 8 and the mounting table 34 and the support column 32 and on the inner surface of the gate valve 18, the Mn-containing source gas and The adhesion of water vapor is effectively suppressed.
- FIG. 4 is a graph showing the film thickness of the film deposited on each surface layer.
- the MnOx film is formed to a thickness of about 4.2 nm. This is an undesirable result.
- the thickness of the deposited MnOx film is suppressed and very thin in all materials. That is, the film thickness in the case of a silicon layer chip subjected to HF treatment (hydrophobization treatment) is about 0.5 nm, and the film thickness in the case of a chip of SiOC layer (black diamond) is about 0.2 nm. The film thickness in the case of a porous SiOC layer chip was about 0.6 nm, and it was found that good results were obtained in all cases.
- the hydrophobic layer 96 is formed on a necessary portion of the surface of each member before the film forming apparatus 2 is assembled.
- the present invention is not limited to this.
- the hydrophobic treatment may be performed prior to the formation of the Mn-containing film after assembling the film forming apparatus.
- FIG. 5 is a flowchart showing an example of such a case.
- a hydrophobic gas is flowed from a gas source (not shown) in a state where the wafer W is not accommodated in the processing container 4 of the film forming apparatus 2 constructed by assembling the respective members formed with the silicon layer, A hydrophobizing step is performed in which the surface of the silicon layer formed on the surface of each member is hydrophobized (S1).
- the hydrophobizing gas HF gas or HMDS gas can be used.
- the surface of the silicon layer formed on the surface of each member that is, the inner surface of the processing container 4, the gas injection surface 8 of the shower head unit 6, the surface of the mounting table structure 30, and the surface of the gate valve 18 is obtained.
- the hydrophobic layer 96 is formed by being hydrophobized.
- a hydrophobic layer 96 is formed on the surface of each member.
- a thin film forming step is performed in which a Mn-containing source gas and water vapor are flown to form a MnOx film (S2).
- S2 MnOx film
- the hydrophobic layer 96 is formed on the surface of each member, the same effect as the effect described above can be exhibited.
- the above-described hydrophobizing treatment has been performed on the silicon layer attached to the surface of each member, but the present invention is not limited to this. Hydrophobization is directly performed on each member without providing a silicon layer on the surface. Processing may be performed.
- the same material is used for each member as the hydrophobic layer 96.
- the present invention is not limited to this, and various materials may be combined separately.
- an SiOC layer may be provided as the hydrophobic layer 96 on the inner surface of the processing container 4
- an HF-treated silicon layer may be provided as the hydrophobic layer 96 on the gas ejection surface 8 of the shower head unit 6.
- the oxygen-containing gas includes H 2 O (water vapor), N 2 O, NO 2 , NO.
- H 2 O water vapor
- N 2 O nitrogen
- NO 2 nitrogen
- One or more materials selected from the group consisting of O 3 , O 2 , H 2 O 2 , CO, CO 2 , alcohols and organic acids can be used.
- Alcohols include methyl alcohol and ethyl alcohol.
- the present invention is not limited to this.
- the present invention can also be applied when a Mn film is formed as a thin film using an Mn-containing source gas without using an oxygen-containing gas.
- Mn is used as an example of the metal contained in the organic metal source gas, but the present invention is not limited to this.
- the metal contained in the organic metal source gas is selected from the group consisting of Mn, Nb, Zr, Cr, V, Y, Pd, Ni, Pt, Rh, Tc, Al, Mg, Sn, Ge, Ti, and Re.
- One or more metals can be used.
- HF gas or HMDS gas has been described as an example of the hydrophobizing gas, but the present invention is not limited to this.
- hydrophobizing gas HF (hydrofluoric acid), HMDS (Hexamethyldisilazane), TMDS (1,1,3,3-Tetramethyldisilazane), TM SDMA (Dimethylaminotrimethylsilane), DMSDMA (Dimethylsilyldimethylamine), TMMAS (Trimethylmethylaminosilane), TMICS (Trimethyl ( isocyanato) silane), TMSA (Trimethylsilylacetylene), and TMSC (Trimethylsilylcyanide5), 1,3,5,7-tetramethylcyclotetrasiloxane, dimethylsilane, tetraethylcyclotetrasiloxane, 1,2,3-triethyl-2, 4,6-trimethylcyclotrisilazane, 1,2,3,4,5,6-hexa
- a semiconductor wafer has been described as an example of the object to be processed, but the semiconductor wafer includes a silicon substrate and a compound semiconductor substrate such as GaAs, SiC, or GaN.
- the present invention is not limited to these substrates, and the present invention can also be applied to glass substrates, ceramic substrates, and the like used in liquid crystal display devices.
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Abstract
Description
Claims (10)
- 真空引き可能になされた処理容器内で、有機金属原料ガスを用いて被処理体の表面に薄膜を形成するようにした成膜装置において、
前記処理容器内の雰囲気に晒される部材の表面に、疎水層が設けられている
ことを特徴とする成膜装置。 - 真空引き可能になされた処理容器内で、有機金属原料ガスと酸素含有ガスとを用いて被処理体の表面に薄膜を形成するようにした成膜装置において、
前記処理容器内の雰囲気に晒される部材の表面に、疎水層が設けられている
ことを特徴とする成膜装置。 - 前記部材には、前記処理容器と、前記処理容器内へガスを導入するシャワーヘッド部と、前記被処理体を支持する載置台構造と、前記処理容器内へ前記被処理体を搬出入する時に開閉されるゲートバルブと、からなる群より選択される1以上が含まれている
ことを特徴とする請求項1または2に記載の成膜装置。 - 前記処理容器に接続された排気配管の内部にも、前記疎水層が形成されている
ことを特徴とする請求項1乃至3のいずれか一項に記載の成膜装置。 - 前記疎水層は、SiOC層とフッ素系樹脂層と疎水化処理されたシリコン層よりなる群より選択される1つの層からなる
ことを特徴とする請求項請求項1乃至4のいずれか一項に記載の成膜装置。 - 前記有機金属原料ガスに含まれる金属は、Mn、Nb、Zr、Cr、V、Y、Pd、Ni、Pt、Rh、Tc、Al、Mg、Sn、Ge、Ti、Reよりなる群から選択される1以上の金属である
ことを特徴とする請求項1乃至5のいずれか一項に記載の成膜装置。 - 前記Mnを含む有機金属材料は、(EtCp)2 Mn[=Mn(C2 H5 C5 H4 )2 ]、Cp2 Mn[=Mn(C5 H5 )2 ]、(MeCp)2 Mn[=Mn(CH3 C5 H4 )2 ]、(i-PrCp)2 Mn[=Mn(C3 H7 C5 H4 )2 ]、MeCpMn(CO)3 [=(CH3 C5 H4 )Mn(CO)3 ]、(t-BuCp)2 Mn[=Mn(C4 H9 C5 H4 )2 ]、CH3 Mn(CO)5 、Mn(DPM)3 [=Mn(C11H19O2 )3 ]、Mn(DMPD)(EtCp)[=Mn(C7 H11C2 H5 C5 H4 )]、Mn(acac)2 [=Mn(C5 H7 O2 )2 ]、Mn(DPM)2 [=Mn(C11H19O2 )2 ]、Mn(acac)3 [=Mn(C5 H7 O2 )3 ]、Mn(hfac)2 [=Mn(C5HF6 O2 )3 ]、((CH3 )5 Cp)2 Mn[=Mn( (CH3 )5 C5 H4 )2 ]、[Mn(iPr-AMD)2 ][=Mn(C3 H7 NC(CH3 )NC3 H7 )2 ]、[Mn(tBu-AMD)2 ][=Mn( C4 H9 NC(CH3 )NC4 H9 )2 ]よりなる群から選択される1以上の材料である
ことを特徴とする請求項6記載の成膜装置。 - 真空引き可能になされた処理容器内で、有機金属原料ガスを用いて被処理体の表面に薄膜を形成する成膜方法において、
前記処理容器内へ前記被処理体を収容しない状態で疎水化ガスを流して前記処理容器の表面を疎水化する疎水化工程と、
前記処理容器内へ前記被処理体を収容した状態で前記有機金属原料ガスを流して前記薄膜を形成する薄膜形成工程と、
を備えたことを特徴とする成膜方法。 - 真空引き可能になされた処理容器内で、有機金属原料ガスを用いて被処理体の表面に薄膜を形成する成膜方法において、
前記処理容器内の雰囲気に晒される部材の表面にシリコン層を予め形成するシリコン層形成工程と、
前記処理容器内へ前記被処理体を収容しない状態で疎水化ガスを流して前記シリコン層の表面を疎水化する疎水化工程と、
前記処理容器内へ前記被処理体を収容した状態で前記有機金属原料ガスを流して前記薄膜を形成する薄膜形成工程と、
を備えたことを特徴とする成膜方法。 - 前記疎水化ガスは、HF(フッ酸)、HMDS(Hexamethyldisilazane)、TMDS(1,1,3,3-Tetramethyldisilazane)、TMSDMA(Di methylaminotrimethylsilane)、DMSDMA(Dimethylsilyldimethylamine)、TMMAS(Trimethylmethylaminosilane)、TMICS(Trimethyl(isocyanato)silane)、TMSA(Trimethylsilylacetylene)、及びTMSC(Trim ethylsilylcyanide5 )、1,3,5,7-テトラメチルシクロテトラシロキサ ン、ジメチルシラン、テトラエチルシクロテトラシロキサン、1,2,3-トリエチル-2,4,6-トリメチルシクロトリシラザン、1,2,3,4,5,6-ヘキサメチルシクロトリシラザン、モノメチルシラン、ヘキサメチルジシラン、ヘキサメチルシロキサン、トリメチルシラン、テトラメチルシラン、ジメチルジメトキシシラン、オクタメチルシクロテトラシロキサン、トリメトキシメチルシラン、ヘキサエチルジシラザン、ヘキサフェニルジシラザン、ヘプタメチルジシラザン、ジプロピル-テトラメチルジシラザン、ジ-n-ブチル-テトラメチルジシラザン、ジ-n-オクチル-テトラメチルジシラザン、ジビニル-テトラメチルジシラザン、1,1,3,3,5,5-ヘキサメチルシクロトリシラザン、ヘキサエチルシクロトリシラザン、ヘキサフェニルシクロトリシラザン、オクタメチルシクロテトラシラザン、オクタエチルシクロテトラシラザン、テトラエチル-テトラメチルシクロテトラシラザン、テトラフェニルジメチルジシラザン、ジフェニル-テトラメチルジシラザン、トリビニル-トリメチルシクロトリシラザン、及びテトラビニル-テトラメチルシクロテトラシラザンよりなる群から選択される1以上のガスよりなる
ことを特徴とする請求項8または9に記載の成膜方法。
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CN2010800168676A CN102395705A (zh) | 2009-07-22 | 2010-07-21 | 成膜装置和成膜方法 |
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- 2010-07-21 WO PCT/JP2010/062242 patent/WO2011010660A1/ja active Application Filing
- 2010-07-21 KR KR1020127001744A patent/KR101361249B1/ko active IP Right Grant
- 2010-07-21 CN CN2010800168676A patent/CN102395705A/zh active Pending
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Also Published As
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US20140190409A1 (en) | 2014-07-10 |
US8709541B2 (en) | 2014-04-29 |
KR20120034110A (ko) | 2012-04-09 |
US20120251721A1 (en) | 2012-10-04 |
CN102395705A (zh) | 2012-03-28 |
KR101361249B1 (ko) | 2014-02-11 |
JP5359642B2 (ja) | 2013-12-04 |
JP2011026634A (ja) | 2011-02-10 |
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