WO2015198798A1 - サセプタ及びその製造方法 - Google Patents
サセプタ及びその製造方法 Download PDFInfo
- Publication number
- WO2015198798A1 WO2015198798A1 PCT/JP2015/065763 JP2015065763W WO2015198798A1 WO 2015198798 A1 WO2015198798 A1 WO 2015198798A1 JP 2015065763 W JP2015065763 W JP 2015065763W WO 2015198798 A1 WO2015198798 A1 WO 2015198798A1
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- Prior art keywords
- carbide layer
- recess
- forming
- silicon carbide
- base material
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 9
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 229910003468 tantalcarbide Inorganic materials 0.000 claims abstract description 61
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 58
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000000463 material Substances 0.000 claims abstract description 48
- 230000000873 masking effect Effects 0.000 claims description 30
- 239000000758 substrate Substances 0.000 claims description 20
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 16
- 229910052715 tantalum Inorganic materials 0.000 claims description 16
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 229910002804 graphite Inorganic materials 0.000 claims description 15
- 239000010439 graphite Substances 0.000 claims description 15
- 238000005255 carburizing Methods 0.000 claims description 6
- 239000003575 carbonaceous material Substances 0.000 claims description 4
- 239000012535 impurity Substances 0.000 abstract description 4
- 239000010409 thin film Substances 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 96
- 238000005229 chemical vapour deposition Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- JOHWNGGYGAVMGU-UHFFFAOYSA-N trifluorochlorine Chemical compound FCl(F)F JOHWNGGYGAVMGU-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B25/00—Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
- C30B25/02—Epitaxial-layer growth
- C30B25/12—Substrate holders or susceptors
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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
- C23C16/04—Coating on selected surface areas, e.g. using masks
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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
- C23C16/04—Coating on selected surface areas, e.g. using masks
- C23C16/042—Coating on selected surface areas, e.g. using masks using masks
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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
- C23C16/04—Coating on selected surface areas, e.g. using masks
- C23C16/045—Coating cavities or hollow spaces, e.g. interior of tubes; Infiltration of porous substrates
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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
- C23C16/06—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 metallic material
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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
- C23C16/32—Carbides
- C23C16/325—Silicon carbide
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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
- C23C16/458—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 supporting substrates in the reaction chamber
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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
- C23C16/458—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 supporting substrates in the reaction chamber
- C23C16/4581—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 supporting substrates in the reaction chamber characterised by material of construction or surface finish of the means for supporting the substrate
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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
- C23C16/56—After-treatment
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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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
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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
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02142—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing silicon and at least one metal element, e.g. metal silicate based insulators or metal silicon oxynitrides
- H01L21/0215—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing silicon and at least one metal element, e.g. metal silicate based insulators or metal silicon oxynitrides the material containing tantalum, e.g. TaSiOx
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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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/02521—Materials
- H01L21/02524—Group 14 semiconducting materials
- H01L21/02529—Silicon carbide
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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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- 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
- H01L21/68757—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 coating or a hardness or a material
Definitions
- the present invention relates to a susceptor and a manufacturing method thereof.
- Patent Document 1 the part on which the wafer is placed is configured by a member made of separable tantalum carbide, and the peripheral part of the part on which the wafer is placed is separable silicon carbide.
- a susceptor composed of a coated graphite material has been proposed.
- Patent Document 1 since the susceptor disclosed in Patent Document 1 is composed of a plurality of members, there is a problem that the manufacturing process is complicated and the handling is not easy.
- An object of the present invention is to provide a susceptor capable of suppressing impurities and the like from adhering to a wafer when a thin film is formed on the wafer, and a method for manufacturing the same.
- the susceptor of the present invention is characterized by comprising a substrate having a recess, a tantalum carbide layer formed directly on the bottom surface of the recess, and a silicon carbide layer formed on the surface of the substrate other than the recess. .
- a tantalum carbide layer may also be directly formed on the side surface of the recess.
- the base material is preferably made of a carbon material, and more preferably made of graphite.
- the method of manufacturing a susceptor according to the first aspect of the present invention includes a step of preparing an original base material in which no concave portion is formed, a step of forming a silicon carbide layer on the surface of the original base material, and a concave portion in the original base material. And a step of removing the silicon carbide layer in a region corresponding to the recess, and a step of forming a tantalum carbide layer on the bottom surface of the recess.
- the method of manufacturing a susceptor according to the second aspect of the present invention includes a step of preparing a base material in which a concave portion is formed, a step of forming a silicon carbide layer on the surface of the base material other than the concave portion, and a bottom surface of the concave portion. And a step of forming a tantalum carbide layer.
- the step of forming the silicon carbide layer includes a step of disposing a masking member in the recess, a step of forming a silicon carbide layer on the surface of the substrate on which the masking member is disposed, and carbonization. And removing the masking member from the recess after forming the silicon layer.
- the step of forming the tantalum carbide layer includes a step of forming a metal tantalum layer on the bottom surface of the recess, and a tantalum carbide by carburizing the metal tantalum layer. Forming a layer.
- the step of forming the tantalum carbide layer includes a step of providing a masking jig so as to cover the surface of the base material other than the recess, and a masking jig.
- the tantalum carbide layer may be formed simultaneously on the bottom surface and the side surface of the recess.
- the tantalum carbide layer when the tantalum carbide layer is formed, in order to prevent the tantalum carbide layer from being formed around the masking jig and the base material, It is preferable to dispose an expanded graphite sheet between the masking jig and the substrate.
- the present invention when a thin film is formed on a wafer, it is possible to prevent impurities and the like from adhering to the wafer.
- FIG. 1 is a schematic cross-sectional view showing a susceptor according to an embodiment of the present invention.
- FIG. 2 is typical sectional drawing which shows the manufacturing process of embodiment of the 1st aspect of this invention.
- FIG. 3 is typical sectional drawing which shows the manufacturing process of embodiment of the 2nd aspect of this invention.
- FIG. 4 is a schematic cross-sectional view showing a masking jig used in the embodiment of the present invention.
- FIG. 5 is a schematic cross-sectional view showing an enlarged front end portion of the masking jig.
- FIG. 1 is a schematic cross-sectional view showing a susceptor according to an embodiment of the present invention.
- the susceptor 1 includes a base material 10 having a recess 11, a tantalum carbide layer 22, and a silicon carbide layer 20.
- the susceptor 1 is used, for example, when a semiconductor is manufactured by placing a wafer on a tantalum carbide layer 22 that is a wafer placement surface.
- a tantalum carbide layer 22 is formed directly on the bottom surface 11 a and the side surface 11 b of the recess 11.
- the tantalum carbide layer 22 is formed on both the bottom surface 11a and the side surface 11b of the recess 11.
- the tantalum carbide layer 22 is formed on at least the bottom surface 11a. Good.
- a silicon carbide layer 20 is formed on the surface of the substrate 10 other than the recess 11. In the present embodiment, the silicon carbide layer 20 is formed directly on the surface of the substrate 10.
- the base material 10 is preferably made of a carbon material, and more preferably made of graphite. Moreover, it is preferable that the base material 10 is formed from the material which has a thermal expansion coefficient (CTE) comparable as the silicon carbide layer 20 formed on it. From these viewpoints, the base material 10 is preferably formed of a material having a coefficient of thermal expansion (CTE) of 4 to 6.5 / ° C. (350 to 450 ° C.). Also from such a viewpoint, the base material 10 is preferably formed from a carbon material such as graphite.
- the silicon carbide layer 20 can be formed by, for example, a CVD method.
- the thickness of the silicon carbide layer 20 is preferably in the range of 50 ⁇ m to 300 ⁇ m, more preferably in the range of 80 ⁇ m to 160 ⁇ m.
- the tantalum carbide layer 22 can be formed, for example, by forming a metal tantalum layer by a CVD method and then carburizing the metal tantalum layer. The formation of such a tantalum carbide layer is described in, for example, Japanese Patent Application Laid-Open No. 2011-153070.
- the thickness of the tantalum carbide layer 22 is not particularly limited, but is preferably in the range of 10 ⁇ m to 30 ⁇ m, for example.
- the tantalum carbide layer 22 is formed in the recess 11 where the wafer is placed, and the wafer is placed on the tantalum carbide layer 22. For this reason, silicon carbide does not adhere to the back surface of the wafer.
- a silicon carbide layer 20 is formed on the surface of the base material 10 other than the recess 11. For this reason, when silicon carbide is epitaxially grown on the wafer, even if silicon carbide is deposited on the silicon carbide layer 20, the deposited silicon carbide does not peel off. Therefore, the deposited silicon carbide can be prevented from peeling off as particles and adhering to the surface of the wafer. Therefore, in this embodiment, when forming a thin film on a wafer, it can suppress that an impurity etc. adhere to a wafer.
- the tantalum carbide layer 22 is directly formed on the bottom surface 11a and the side surface 11b of the recess 11. For this reason, the tantalum carbide layer 22 can be formed with good adhesion to the substrate 10. It is conceivable to form the tantalum carbide layer 22 in the recess 11 after the silicon carbide layer 20 is formed on the entire surface of the substrate 10 including the inside of the recess 11. In this case, the tantalum carbide layer 22 in the recess 11 is formed on the silicon carbide layer 20. When the tantalum carbide layer 22 is formed directly on the substrate 10 as in this embodiment, the tantalum carbide layer 22 is formed with better adhesion than when the tantalum carbide layer 22 is formed on the silicon carbide layer 20. Can do.
- the tantalum carbide layer 22 is formed on the silicon carbide layer 20, it is difficult to obtain a high degree of dimensional accuracy due to the thickness variation and unevenness of the silicon carbide layer 20.
- the tantalum carbide layer 22 is formed directly on the base material 10, only the film thickness of the tantalum carbide layer 22 is added on the base material 10, so that the dimensional accuracy of the recess 11 can be increased.
- the recess 11 is often required to have high dimensional accuracy, which is a great advantage when used as a susceptor.
- the silicon carbide layer 20 having a thermal expansion coefficient close to that of the base material 10 is formed on the surface of the base material 10 other than the recess 11, it is possible to prevent the susceptor 1 from warping. it can.
- the susceptor 1 of the embodiment shown in FIG. 1 can be manufactured, for example, by the manufacturing method of the first aspect and the second aspect described below.
- FIG. 2 is a schematic cross-sectional view showing the manufacturing process of the embodiment of the first aspect of the present invention.
- an original base material 10a in which the concave portion 11 is not formed is prepared.
- a silicon carbide layer 20 is formed on the surface of the base substrate 10a.
- the silicon carbide layer 20 is formed on the entire surface of the base substrate 10a.
- the silicon carbide layer 20 is formed by a CVD method.
- the recess 11 is formed in the original base material 10a on which the silicon carbide layer 20 is formed.
- the recess 11 is formed by cutting, for example.
- the silicon carbide layer 20 in the region corresponding to the recess 11 is also removed.
- the silicon carbide layer 20 and the substrate 10 exposed from the recess 11 After forming the recess 11, it is preferable to purify the silicon carbide layer 20 and the substrate 10 exposed from the recess 11. For example, it can be purified by heat treatment using chlorine gas and hydrogen gas, chlorine trifluoride gas, or the like. It is preferable to set the ash content of the base material 10 exposed from the recess 11 to 20 ppm or less by the purification treatment.
- a metal tantalum layer 21 is formed on the bottom surface 11a and the side surface 11b of the recess 11.
- the metal tantalum layer 21 is formed by, for example, a CVD method.
- FIG. 4 is a schematic cross-sectional view showing a masking jig used in the embodiment.
- FIG. 5 is a schematic cross-sectional view showing an enlarged front end portion of the masking jig.
- the masking jig 13 shown in FIG. 4 is disposed so as to cover the region where the silicon carbide layer 20 is formed.
- an expanded graphite sheet 14 is sandwiched between the masking jig 13 and the base material 10 in the periphery of the recess 11.
- the thickness of the expanded graphite sheet 14 is preferably about 0.1 to 1.0 mm.
- the tip portion 13 a of the masking jig 13 is formed to extend toward the bottom surface of the recess 11. Thereby, the position shift of the expanded graphite sheet 14 is prevented.
- the thickness of the tantalum carbide layer in the recess 11 may be insufficient.
- the protrusion of the tantalum carbide layer on the susceptor upper surface of the silicon carbide layer 20 is preferably 5 mm or less, more preferably 3 mm or less.
- the metal tantalum layer 21 is formed directly on the bottom surface 11a and the side surface 11b of the recess 11 as shown in FIG.
- the tantalum carbide layer 22 is formed by carburizing the metal tantalum layer 21 formed in the recess 11.
- the carburizing process can be performed, for example, by a method described in Japanese Patent Application Laid-Open No. 2011-153070.
- the susceptor 1 of the embodiment shown in FIG. 1 can be manufactured.
- FIG. 3 is a schematic cross-sectional view showing the manufacturing process of the embodiment of the second aspect of the present invention.
- the recess 11 can be formed by, for example, cutting.
- a masking member 12 is disposed in the recess 11 of the base material 10.
- the masking member 12 preferably has a thermal expansion coefficient close to that of the substrate 10 so that no gap is formed between the masking member 12 and the recess 11 when heated.
- the masking member 12 is formed using the same graphite as the graphite constituting the substrate 10.
- the silicon carbide layer 20 is formed on the surface of the substrate 10.
- the silicon carbide layer 20 is formed by a CVD method.
- the silicon carbide layer 20 is also formed on the masking member 12, after the silicon carbide layer 20 is formed, the masking member 12 is removed, and the state shown in FIG. In this state, it is preferable to purify the silicon carbide layer 20 as in the first aspect.
- a metal tantalum layer 21 is formed on the bottom surface 11a and the side surface 11b of the recess 11 as shown in FIG.
- the tantalum carbide layer 22 is formed by carburizing the metal tantalum layer 21 formed in the recess 11.
- the susceptor 1 of the embodiment shown in FIG. 1 can be manufactured.
- the material of the linear expansion coefficient approximated to the silicon carbide layer 20 is selected as the base material 10
- the tantalum carbide layer 22 is formed at 1800 ° C. and then cooled to room temperature
- the silicon carbide and the tantalum carbide there is a possibility that fine cracks may occur in the tantalum carbide layer 22 due to the difference in linear expansion coefficient.
- the base material 10 is exposed from the cracks, there is a risk that, for example, the graphite of the base material 10 is corroded when coming into contact with the reaction gas.
- the reaction temperature is 1500 ° C. to 1700 ° C. Therefore, the crack that has once expanded can be prevented from being blocked by the expansion of the tantalum carbide layer 22 during the reaction and corroding the base material 10.
- a susceptor can be formed by selecting an appropriate material for the base material 10 regardless of the relationship of the linear expansion coefficient between the base material 10 and the tantalum carbide layer 22.
- the difference between the formation temperature of the tantalum carbide layer and the use temperature is preferably 300 ° C. or less, more preferably 200 ° C. or less.
- the susceptor of the embodiment shown in FIG. 1 has been described as an example of the susceptor of the present invention, but the present invention is not limited to this.
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Abstract
Description
10…基材
10a…元基材
11…凹部
11a…底面
11b…側面
12…マスキング部材
13…マスキング治具
13a…先端部
14…膨張黒鉛シート
20…炭化ケイ素層
21…金属タンタル層
22…炭化タンタル層
Claims (11)
- 凹部を有する基材と、
前記凹部の底面上に直接形成される炭化タンタル層と、
前記凹部以外の前記基材の表面上に形成される炭化ケイ素層とを備える、サセプタ。 - 前記凹部の側面上にも炭化タンタル層が直接形成されている、請求項1に記載のサセプタ。
- 前記基材が、炭素材料から形成されている、請求項1または2に記載のサセプタ。
- 前記基材が、黒鉛から形成されている、請求項3に記載のサセプタ。
- 請求項1~4のいずれか一項に記載のサセプタを製造する方法であって、
前記凹部が形成されていない元基材を準備する工程と、
前記元基材の表面上に前記炭化ケイ素層を形成する工程と、
前記元基材に前記凹部を形成するとともに、前記凹部に対応する領域の前記炭化ケイ素層を除去する工程と、
前記凹部の底面上に炭化タンタル層を形成する工程とを備える、サセプタの製造方法。 - 請求項1~4のいずれか一項に記載のサセプタを製造する方法であって、
前記凹部が形成された基材を準備する工程と、
前記凹部以外の前記基材の表面上に炭化ケイ素層を形成する工程と、
前記凹部の底面上に炭化タンタル層を形成する工程とを備える、サセプタの製造方法。 - 前記炭化ケイ素層を形成する工程が、
前記凹部内にマスキング部材を配置する工程と、
前記マスキング部材を配置した前記基材の表面上に炭化ケイ素層を形成する工程と、
前記炭化ケイ素層を形成した後、前記マスキング部材を前記凹部から取り除く工程とを含む、請求項6に記載のサセプタの製造方法。 - 前記炭化タンタル層を形成する工程が、
前記凹部の底面上に金属タンタル層を形成する工程と、
前記金属タンタル層を浸炭処理して前記炭化タンタル層を形成する工程とを含む、請求項5~7のいずれか一項に記載のサセプタの製造方法。 - 前記炭化タンタル層を形成する工程が、
前記凹部以外の前記基材の表面上を覆うようにマスキング治具を設ける工程と、
前記マスキング治具を設けた後、前記炭化タンタル層を形成する工程とを含む、請求項5~8のいずれか一項に記載のサセプタの製造方法。 - 前記炭化タンタル層を形成する工程において、前記マスキング治具と前記基材の間に膨張黒鉛シートを配置する、請求項5~9のいずれか一項に記載のサセプタの製造方法。
- 前記炭化タンタル層を形成する工程において、前記凹部の、底面上と、側面上とに同時に炭化タンタル層を形成する、請求項5~10のいずれか一項に記載のサセプタの製造方法。
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EP15812047.7A EP3162913B1 (en) | 2014-06-24 | 2015-06-01 | Susceptor and method for manufacturing same |
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US20210040643A1 (en) * | 2017-05-12 | 2021-02-11 | Toyo Tanso Co., Ltd. | Susceptor, method for producing epitaxial substrate, and epitaxial substrate |
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JP7176489B2 (ja) | 2019-07-12 | 2022-11-22 | 三菱電機株式会社 | 炭化珪素エピタキシャル成長装置及び炭化珪素エピタキシャルウエハの製造方法 |
US20220411959A1 (en) * | 2021-06-24 | 2022-12-29 | Coorstek Kk | Susceptor and manufacturing method thereof |
CN118727134A (zh) * | 2023-03-31 | 2024-10-01 | 华为技术有限公司 | 石墨环、石墨环的制备方法及外延设备 |
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