WO2011016121A1 - 成膜装置 - Google Patents
成膜装置 Download PDFInfo
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- WO2011016121A1 WO2011016121A1 PCT/JP2009/063939 JP2009063939W WO2011016121A1 WO 2011016121 A1 WO2011016121 A1 WO 2011016121A1 JP 2009063939 W JP2009063939 W JP 2009063939W WO 2011016121 A1 WO2011016121 A1 WO 2011016121A1
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- WIPO (PCT)
- Prior art keywords
- main surface
- semiconductor substrate
- substrate
- susceptor
- forming apparatus
- Prior art date
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- 239000000758 substrate Substances 0.000 claims abstract description 222
- 239000004065 semiconductor Substances 0.000 claims abstract description 166
- 238000010438 heat treatment Methods 0.000 claims abstract description 114
- 239000010408 film Substances 0.000 claims description 130
- 239000010409 thin film Substances 0.000 claims description 63
- 150000004767 nitrides Chemical class 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
- 150000004678 hydrides Chemical class 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- 150000002902 organometallic compounds Chemical class 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims 1
- 230000006866 deterioration Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 57
- 229910052594 sapphire Inorganic materials 0.000 description 49
- 239000010980 sapphire Substances 0.000 description 49
- 238000000034 method Methods 0.000 description 42
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 31
- 229910052710 silicon Inorganic materials 0.000 description 31
- 239000010703 silicon Substances 0.000 description 31
- 230000015572 biosynthetic process Effects 0.000 description 29
- 229910002601 GaN Inorganic materials 0.000 description 16
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 16
- 238000001947 vapour-phase growth Methods 0.000 description 12
- 238000009826 distribution Methods 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000013078 crystal Substances 0.000 description 8
- 238000000927 vapour-phase epitaxy Methods 0.000 description 8
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 7
- 238000000151 deposition Methods 0.000 description 7
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 6
- 238000011065 in-situ storage Methods 0.000 description 5
- 229910010271 silicon carbide Inorganic materials 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
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- 238000005229 chemical vapour deposition Methods 0.000 description 4
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- 238000011144 upstream manufacturing Methods 0.000 description 4
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- 150000001875 compounds Chemical class 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 description 3
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- 229910003468 tantalcarbide Inorganic materials 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000007738 vacuum evaporation Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- 238000007259 addition reaction Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- MDPILPRLPQYEEN-UHFFFAOYSA-N aluminium arsenide Chemical compound [As]#[Al] MDPILPRLPQYEEN-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- 239000010453 quartz Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000012808 vapor phase Substances 0.000 description 2
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- RNQKDQAVIXDKAG-UHFFFAOYSA-N aluminum gallium Chemical compound [Al].[Ga] RNQKDQAVIXDKAG-UHFFFAOYSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
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- 239000007769 metal material Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
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Images
Classifications
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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
- C23C16/46—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 heating the substrate
-
- 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
- C30B25/10—Heating of the reaction chamber or the substrate
-
- 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
- C30B25/16—Controlling or regulating
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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
- H01L21/02367—Substrates
- H01L21/0237—Materials
- H01L21/02373—Group 14 semiconducting materials
- H01L21/02381—Silicon, silicon germanium, germanium
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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
- H01L21/02367—Substrates
- H01L21/0237—Materials
- H01L21/0242—Crystalline insulating materials
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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
- H01L21/02436—Intermediate layers between substrates and deposited layers
- H01L21/02439—Materials
- H01L21/02455—Group 13/15 materials
- H01L21/02458—Nitrides
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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
- H01L21/02436—Intermediate layers between substrates and deposited layers
- H01L21/02494—Structure
- H01L21/02496—Layer structure
- H01L21/02502—Layer structure consisting of two layers
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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
- H01L21/02436—Intermediate layers between substrates and deposited layers
- H01L21/02494—Structure
- H01L21/02496—Layer structure
- H01L21/02505—Layer structure consisting of more than two layers
- H01L21/02507—Alternating layers, e.g. superlattice
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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
- H01L21/02518—Deposited layers
- H01L21/02521—Materials
- H01L21/02538—Group 13/15 materials
- H01L21/0254—Nitrides
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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
Definitions
- the present invention relates to a film forming apparatus for vapor-depositing or vacuum depositing a thin film on a main surface of a substrate. More specifically, the present invention relates to a semiconductor wafer when forming a thin film on a main surface of a semiconductor substrate. The present invention relates to a film forming apparatus for controlling the main surface of the film to be bent by heating.
- the raw material constituting the thin film to be formed is heated on one main surface of the semiconductor substrate while heating.
- the method of exposing to gas is generally performed.
- the source gas for example, a source gas containing a group III nitride semiconductor organometallic compound that becomes a cation or a group V element that becomes an anion is used. By supplying these source gases onto the main surface of the heated semiconductor substrate, a thin film is grown on one main surface of the semiconductor substrate.
- Non-Patent Document 1 A technique for growing a thin film on a heated semiconductor substrate using the above-described source gas (vapor phase) is called vapor phase growth.
- a semiconductor substrate is set in an apparatus for performing vapor phase growth, and the semiconductor substrate is heated.
- a susceptor is provided as a member. In any of the methods for heating a semiconductor substrate disclosed in Non-Patent Document 1, a semiconductor substrate to be heated is set on a susceptor.
- FIG. 6 is a schematic diagram showing an outline of the inside of a film forming apparatus by vapor deposition that has been conventionally used.
- a conventional deposition apparatus 100 by vapor deposition is lower than a main surface direction of a susceptor 1 for setting a substrate, for example, a semiconductor substrate 10 (in FIG.
- a heater 2 as a heating member is provided in a direction facing the main surface opposite to the side on which the substrate 10 is set. That is, the susceptor 1 and the semiconductor substrate 10 are heated from below the susceptor 1.
- a flow channel 3 for flowing a source gas is installed on the upper side of the susceptor 1 (in FIG. 6, the direction facing the side on which the semiconductor substrate 10 is set).
- the source gas constituting the thin film to be formed is supplied from the source gas nozzle 4 installed at one end (upstream side) of the flow channel 3. It flows inside the flow channel 3 so that one main surface of the semiconductor substrate 10 (the upper main surface shown in FIG. 6) can be exposed to this source gas. Then, a thin film composed of the supplied source gas is formed on the main surface of the heated semiconductor substrate 10.
- the curvature of the semiconductor substrate 10 to be described later that is, the direction along the main surface of the semiconductor substrate 10, using laser light emitted from the module 5 installed on the ceiling (upper side) inside the film forming apparatus 100. The degree of curvature with respect to can be measured.
- Non-patent Document 2 it is indicated by data that a wafer as a semiconductor substrate is warped (curved) even if the temperature is raised.
- the warpage of the semiconductor substrate occurs because a temperature difference between the upper and lower sides of the semiconductor substrate appears due to the heat flow generated by the temperature rise of the semiconductor substrate.
- a susceptor as a member for setting a semiconductor substrate and heating the semiconductor substrate is currently set on a semiconductor substrate on which a thin film is to be grown on the upper side of the susceptor.
- a heater is installed on the side to heat the susceptor.
- a semiconductor substrate installed in the upper side of a susceptor is heated by heating a susceptor from the lower side with a heater.
- the method of flowing the raw material gas which comprises the thin film to form on the upper side of a semiconductor substrate is used. In the case of the phase down, the above case is upside down.
- a semiconductor substrate on which a thin film is to be grown is set below the susceptor, and a heater for heating the susceptor is installed above the susceptor. And a semiconductor substrate installed in the lower side of a susceptor is heated by heating a susceptor from the upper side with a heater. And the method of flowing the gas of the raw material which comprises the thin film to form on the lower side of a semiconductor substrate is used.
- the heat of the heater is transmitted from the lower side of the susceptor to the upper side, and is transmitted from the lower side to the upper side of the semiconductor substrate set on the upper side of the susceptor. Furthermore, heat flows due to radiation above the semiconductor substrate and heat transfer to the raw material gas. Then, a temperature difference appears between the upper and lower sides with respect to the main surface direction of the semiconductor substrate. Therefore, a wafer that is a semiconductor substrate is warped (curved) in the direction along the main surface.
- the lower temperature of the wafer becomes higher than the upper temperature, so that warpage occurs so that the lower side of the wafer is convex (convex downward).
- the upper temperature of the wafer becomes higher than the lower temperature, so that the upper side of the wafer is convex (convex upward). Warpage occurs to be.
- the contact state between the main surface of the wafer and the susceptor varies depending on the position on the main surface of the wafer. For example, if the wafer is warped so that the wafer protrudes downward due to the heater installed on the lower side of the susceptor, the vicinity of the center of the main surface of the wafer comes into contact with the susceptor, but at the edge of the main surface. As the distance gets closer, the distance between the wafer and the susceptor increases. Therefore, in this case, the temperature of the central portion of the wafer is higher than the temperature of the edge of the wafer. In this way, the temperature distribution on the main surface of the wafer may cause the uniformity of the thin film grown on the wafer to deteriorate.
- the wafer depending on the type of thin film grown on the main surface of the wafer, which is a semiconductor substrate, for example, when gallium nitride (GaN) is vapor-phase grown on the main surface of a silicon (Si) substrate, the wafer after film formation If the warpage (warpage that protrudes downward) becomes large, cracks may occur in the wafer. As described above, due to heat transfer and temperature difference between the upper side and the lower side in the direction along the main surface of the wafer, warpage of the wafer, deterioration of homogeneity, and occurrence of cracks in some cases Problems can occur.
- GaN gallium nitride
- Si silicon
- the present invention has been made in order to solve the above-described problems, and its purpose is to form a thin film on the main surface of the semiconductor substrate so that the main surface of the semiconductor substrate is curved by heating. It is to provide a film forming apparatus to be controlled.
- a film forming apparatus includes a susceptor that holds a substrate, a first heating member that is disposed to face one main surface of the susceptor, and the other of the susceptor that is located on the opposite side of the one main surface.
- the 2nd heating member arrange
- the film forming apparatus including two heating members the semiconductor substrate set on one main surface of the susceptor can be heated by the heating members from both the upper side and the lower side. .
- the temperature difference between the upper side and the lower side becomes smaller than in the case where the heating member is provided and heated only on either the upper side or the lower side of the semiconductor substrate.
- the amount of warpage when a thin film is grown on the semiconductor substrate can be reduced.
- the temperature uniformity of the semiconductor substrate is improved, and the formed thin film is formed on the semiconductor substrate. It can be almost homogenized over the main surface.
- the film forming apparatus includes a susceptor that holds a substrate, a first heating member that is disposed so as to face one main surface of the susceptor, and a susceptor that is positioned on the opposite side of the one main surface.
- a second heating member disposed so as to face the other main surface, and a control unit capable of independently controlling the heating temperatures of the first heating member and the second heating member.
- One heating member and the second heating member can heat only one or both. That is, the film forming apparatus according to the present invention has an ability to form a good film by heating only one of the first heating member and the second heating member. Therefore, it is possible to arbitrarily control the heat flow inside the film forming apparatus.
- the possibility of cracks occurring in the semiconductor substrate can be reduced.
- the heating member so as to face both one and the other main surface with respect to the main surface direction of the semiconductor substrate, the temperature difference of the source gas in the atmosphere facing the main surface of the semiconductor substrate as a result, the concentration gradient due to the gas can be reduced and the occurrence of convection of the source gas can be suppressed. For this reason, the film quality of the formed thin film can be improved.
- the film forming apparatus further includes a measuring unit that measures the curvature or warpage of the substrate, and each of the first heating member and the second heating member is determined according to the result of measuring the curvature or warpage of the substrate.
- the measurement result is fed back from the control unit to the first heating member and the second heating member while measuring the amount and direction of curvature of the semiconductor substrate in real time.
- the temperatures of the first heating member and the second heating member can be controlled in real time so as to reduce the curvature. Since the warpage can be reduced by reducing the curvature, the warpage of the semiconductor substrate can be further reduced as described above.
- the semiconductor substrate is heated using the susceptor and the heating member described above, and a raw material gas constituting a thin film to be formed is supplied onto one main surface of the semiconductor substrate while heating.
- a raw material gas constituting a thin film to be formed is supplied onto one main surface of the semiconductor substrate while heating.
- a source gas for using the above-described method (vapor phase growth) for example, a chloride gas or a hydride gas of a nonmetallic material may be used.
- vapor of an organometallic compound may be used.
- vapor of a component constituting a thin film of, for example, a group III nitride semiconductor is deposited in vacuum while the semiconductor substrate is heated. You may use the method by vacuum evaporation. By using this method, it is possible to slow down the film formation rate and to observe the thin film in situ while forming the film.
- the film forming apparatus of the present invention it is possible to reduce the possibility of warping or cracking on the substrate and to improve the film quality of the grown thin film.
- FIG. 2 is a schematic cross-sectional view showing an outline of the inside of a film forming apparatus 201 including a control unit that controls the temperature of a heater.
- FIG. It is a cross-sectional schematic diagram which shows the outline
- a film deposition apparatus 200 by vapor deposition according to Embodiment 1 of the present invention is arranged above a susceptor 1 for setting a substrate, for example, a wafer that is a semiconductor substrate 10.
- a heater 7 is provided as a first heating member disposed so as to face the surface.
- a heating jig 6 is arranged in a region sandwiched between the heater 7 existing above the susceptor 1 and the susceptor 1.
- the main surface refers to the surface set in the direction along the horizontal direction having the largest area among the surfaces of the semiconductor substrate 10 and the susceptor 1, for example.
- growth and film formation are used almost synonymously.
- a heater 2 as a second heating member is provided on the lower side of the susceptor 1 so as to face the main surface on the lower side of the susceptor 1.
- a flow channel 3 for flowing a source gas is installed on the upper side of the susceptor 1.
- the heater 7 and the heater 2 heat the susceptor 1 and the semiconductor substrate 10 thereon, a thin film to be formed is formed from the source gas nozzle 4 installed at one end (upstream side) of the flow channel 3.
- the component source gas is flowed into the flow channel 3 so that one main surface (the upper main surface shown in FIG. 1) of the semiconductor substrate 10 is exposed to the source gas.
- a thin film composed of the supplied source gas is formed on the main surface of the heated semiconductor substrate 10.
- the curvature or warpage of the semiconductor substrate 10 to be described later that is, along the main surface of the semiconductor substrate 10, using the laser light emitted from the module 5 installed on the ceiling (upper side) of the film forming apparatus 200. It is possible to measure the degree of curvature with respect to the direction.
- both the curvature and the warpage are quantitative indicators of the degree of curvature of the semiconductor substrate 10, but the curvature is an index representing the degree of curvature at a certain point on the main surface of the semiconductor substrate 10. Is an index representing the degree of curvature of the entire main surface of the semiconductor substrate 10 and the shape of the main surface of the semiconductor substrate 10 accompanying the curvature.
- the heating jig 6, the heater 7, and the flow channel 3 are partially discontinuous in the left-right direction. This is because the laser light emitted from the module 5 is emitted from the main surface of the semiconductor substrate 10. This is to facilitate the image to be propagated upward. Therefore, as long as the laser beam from the module 5 can be transmitted, a member in which the left and right directions of the heating jig 6 and the heater 7 are continuous may be used. In FIG. 1, the laser beam from the module 5 is irradiated from above.
- the module 5 is set near the side surface of the flow channel 3, and the module 5 to the main surface of the semiconductor substrate 10 are You may irradiate the laser beam which can permeate
- FIG. 1 is a cross-sectional view, the heating jig 6, the heater 7, and the flow channel 3 are actually one member.
- the susceptor 1 is for setting the semiconductor substrate 10.
- both the susceptor 1 and the heating jig 6 have a role of uniformly transmitting the heat of the heater to the semiconductor substrate 10.
- the heating jig 6 propagates the heat generated by the heater 7 and the susceptor 1 uniformly propagates the heat generated by the heater 2 to the semiconductor substrate 10.
- Both the susceptor 1 and the heating jig 6 are made of carbon (C) coated with silicon carbide (SiC), for example. Since silicon carbide has high thermal conductivity and excellent heat resistance, heat can be smoothly propagated to the semiconductor substrate 10.
- quartz, sapphire, SiC, carbon coated with pyrolytic carbon, boron nitride (BN), and tantalum carbide (TaC) are used as materials for the susceptor 1 and the heating jig 6. it can.
- the flow channel 3 is a pipe provided for supplying a source gas onto the main surface of the semiconductor substrate 10.
- quartz is used as the material of the flow channel 3.
- a raw material gas constituting the thin film to be formed is supplied from the raw material gas nozzle 4 into the flow channel 3. At this time, if the semiconductor substrate 10 is heated by the heater 7 and the heater 2, the source gas supplied onto the main surface of the semiconductor substrate 10 is thermally decomposed and crystals (thin films) are formed on the main surface of the semiconductor substrate 10. Can be formed.
- the gas supplied from the source gas nozzle 4 onto the main surface of the semiconductor substrate 10 has a high vapor pressure at room temperature formed by adding a methyl group (—CH 3 ) to the metal constituting the thin film.
- a liquid or solid organometallic vapor and a non-metallic hydride gas are added.
- These gases are blown onto the main surface of the heated semiconductor substrate 10 and thermally decomposed to obtain semiconductor crystals, thereby using a metal organic vapor phase epitaxy (MOVPE method) to form a group III compound semiconductor thin film as a semiconductor.
- MOVPE method metal organic vapor phase epitaxy
- a film can be formed on the main surface of the substrate 10. As described above, heating by the heater is performed in order to thermally decompose the supplied gas to form a crystal as a thin film.
- a vapor phase growth method (VPE method) using a chloride gas may be used as a gas supplied from the source gas nozzle 4 onto the main surface of the semiconductor substrate 10.
- a vapor phase growth method using a chloride gas and a hydride gas of a nonmetallic material is referred to as a hydride vapor phase growth method (H-VPE method).
- H-VPE method a hydride vapor phase growth method using a chloride gas and a hydride gas of a nonmetallic material.
- a temperature gradient occurs between the lower side and upper side of the main surface of the sapphire substrate, and the curvature of the main surface of the sapphire substrate is caused by the temperature gradient (temperature difference) between the lower side and upper side of the main surface of the sapphire substrate. Increases, warping occurs in the direction along the main surface of the sapphire substrate.
- the source gas supplied to the inside of the flow channel 3 due to radiant heat or the like from the lower side to the upper side of the susceptor 1 due to radiant heat or the like from the lower side to the upper side of the susceptor 1, a gas temperature gradient occurs, resulting in active gas convection. Then, when the source gas supplied from the source gas nozzle 4 passes over the main surface of the semiconductor substrate 10, it passes while repetitively moving in the vertical direction by the convection of the gas. Such gas convection hinders stable vapor phase growth on the main surface of the semiconductor substrate 10.
- the conventional film forming apparatus 100 shown in FIG. 6 includes a heater 7 as a first heating member disposed so as to face the upper main surface of the susceptor 1.
- the semiconductor substrate 10 is heated using a film forming apparatus 200 shown in FIG. 1 having a configuration in which a heating jig 6 is arranged in a region sandwiched between the heater 7 present on the upper side and the susceptor 1.
- the semiconductor substrate 10 set on one main surface of the susceptor 1 is heated by the heating member from both the upper side and the lower side.
- the temperature difference between the upper side and the lower side is higher than that when the heating member is provided and heated only on either the upper side or the lower side of the semiconductor substrate 10 as in the film forming apparatus 100 shown in FIG. Get smaller.
- the curvature of the main surface of the semiconductor substrate 10 when the thin film is grown on the semiconductor substrate 10 is compared with the case where the heating member is provided and heated only on either the upper side or the lower side of the semiconductor substrate 10. The degree of curvature can be reduced, and the amount of warpage can be reduced.
- the film forming apparatus 200 for example, only one of the heater 7 and the heater 2 can be heated as necessary. For example, when only the heater 2 is heated without operating the heater 7 in the film forming apparatus 200, the same operation as the film forming apparatus 100 shown in FIG. 6 can be performed. In other words, the film forming apparatus 200 has a capability of forming a good film even if only one of the heater 7 and the heater 2 is used. Moreover, the heating temperature of the heater 7 and the heater 2 can be set to any heating temperature independently. Therefore, the heat flow inside the film forming apparatus 200 can be arbitrarily controlled.
- each of the heater 7 and the heater 2 can be independently set to an arbitrary heating temperature, including the case where only one of the heater 7 and the heater 2 is heated.
- two heating members are disposed on the main surface of the semiconductor substrate 10 so as to face both the main surfaces of one (upper side) and the other (lower side) with respect to the main surface direction of the semiconductor substrate 10.
- the concentration gradient of the source gas in the facing atmosphere due to the temperature difference is reduced, and generation of convection of the source gas can be suppressed.
- the source gas flows stably from the upstream side to the downstream side in the pipe of the flow channel 3. Therefore, vapor phase growth can be stably performed on the main surface of the semiconductor substrate 10, and the film quality of the grown thin film can be improved.
- the contact state between the main surface of the semiconductor substrate 10 and the susceptor 1 is changed.
- the upper position that is, the central portion and the edge of the semiconductor substrate 10 can be made substantially constant. Therefore, the temperature of the main surface of semiconductor substrate 10 can be made substantially constant regardless of the position on the main surface.
- the thin film formed on the semiconductor substrate 10 can be made substantially homogeneous.
- the possibility of cracks occurring in the semiconductor substrate 10 is reduced by reducing the warpage of the semiconductor substrate 10 after film formation and after temperature drop.
- the warpage of the semiconductor substrate 10 is reduced.
- the thermal expansion coefficient of the substrate (semiconductor substrate 10) and the film grown on the substrate are different, when the temperature is lowered after the film formation, the warpage of the substrate increases, and the substrate may crack. is there.
- the warp generated based on the physical properties of the substrate during film formation is reduced (corrected). be able to.
- the film forming apparatus 200 can heat only one of the heater 7 and the heater 2, and can independently control the temperature of each of the heater 7 and the heater 2 independently. It becomes possible.
- the semiconductor substrate 10 on which the thin film is formed for example, a sapphire substrate, a Si wafer, a compound semiconductor such as GaN, SiC, aluminum nitride (AlN), or aluminum gallium nitride (AlGaN) wafer (substrate). It may be used.
- the curvature can be measured using, for example, laser light emitted from the module 5 serving as a measurement unit installed on the ceiling (upper side) of the film forming apparatus 200.
- the module 5 is set in the vicinity of the side surface of the flow channel 3, and from the diagonal direction with respect to the main surface of the semiconductor substrate 10 from the module 5 to the main surface of the semiconductor substrate 10, You may irradiate the laser beam which can permeate
- the warpage of the semiconductor substrate 10 during film formation is obtained by calculation in the module 5 from the curvature measured by the module 5 (in-situ monitor).
- a commercially available module 5 may be used as the module 5 for measuring the warpage of the semiconductor substrate 10 during film formation.
- a module 5 of a type that calculates the warp by calculation after measuring the curvature of a certain point on the main surface of the semiconductor substrate 10 may be used, or the warp (shape) of the entire semiconductor substrate 10 may be measured.
- a step meter or a surface roughness meter may be used.
- the film forming apparatus 201 shown in FIG. 2 has a configuration in which the film forming apparatus 200 shown in FIG. 1 is further provided with a control unit 30 that controls the temperatures of the heater 7 and the heater 2.
- the control unit 30 is connected to the module 5, and the module 5 performs real-time so that the curvature of the semiconductor substrate 10 becomes a predetermined value according to the result of measuring the curvature in the direction along the main surface of the semiconductor substrate 10.
- the heating temperatures of the heater 7 and the heater 2 can be controlled independently.
- the control unit 30 connected to the module 5 is connected to the heater 7 and the heater 2, and the curvature (warp) of the semiconductor substrate 10 is controlled by independently controlling the heating temperature of the heater 7 and the heater 2 in real time.
- vapor deposition apparatus 301 As shown in FIG. 2, vapor deposition apparatus 301 according to Embodiment 2 of the present invention irradiates vapor of components constituting a thin film to be deposited on one main surface of a substrate, for example, semiconductor substrate 10.
- a material container called a Knudsen cell 71 and a Knudsen cell 72 is provided with a material container having a pinhole at the tip.
- the film forming apparatus 301 has a function of evacuating the apparatus.
- the Knudsen cell 71 and the Knudsen cell 72 are provided with a pin on the main surface of the semiconductor substrate 10 in which a material is heated and evaporated in a vacuum higher than outer space and a jet flow (molecular beam) in which the evaporation molecules are scattered in a uniform direction is heated.
- a group III nitride semiconductor thin film to be formed on the main surface of the semiconductor substrate 10 is crystal-grown by irradiation from the holes.
- a film forming method for depositing on one main surface of a substrate by irradiating a molecular beam in a vacuum with the vapor scattering directions of the components constituting the thin film to be formed in a vacuum is used as a molecular beam epitaxy ( MBE method).
- the Knudsen cell 71 and the Knudsen cell 72 are filled with aluminum (Al) and nitrogen (N), respectively. Then, the Knudsen cell 71 is heated to evaporate Al. Note that N filled in the Knudsen cell 72 is a gas at room temperature, so heating is not necessary. However, for example, when a metal material or the like is filled here, heating is performed in the same manner as the Knudsen cell 71 to evaporate the material. .
- a jet stream (molecular beam) is irradiated onto one main surface of the semiconductor substrate 10 heated in vacuum from a pinhole at the tip of the Knudsen cell.
- Al and N molecules that have reached the main surface of the semiconductor substrate 10 adhere and bond on the main surface of the heated semiconductor substrate 10 to form an AlN crystal. That is, this is a vacuum deposited AlN thin film.
- the MBE method is a non-equilibrium system and does not involve a chemical reaction process, it is a film formation method suitable for analyzing a crystal growth mechanism and growing an ultrathin film.
- Knudsen cells are installed in the film forming apparatus 301 in FIG. 3, the number of Knudsen cells may be increased depending on the type of thin film to be formed. For example, in order to form a ternary gallium aluminum arsenide (GaAlAs) thin film, three Knudsen cells may be installed.
- GaAlAs gallium aluminum arsenide
- the second embodiment of the present invention is different from the first embodiment of the present invention only in that the film forming apparatus 301 using the MBE method by vacuum evaporation described above is used. That is, as shown in FIG. 3, also in the film forming apparatus 301, the semiconductor substrate 10 is set on the upper side of the susceptor 1, and the first heating member arranged so as to face the main surface on the upper side of the susceptor 1. A heater 7 and a heater 2 as a second heating member arranged to face the lower main surface of the susceptor 1 are provided. The two heaters propagate heat to the semiconductor substrate 10 via the susceptor 1 and the heating jig 6, respectively.
- the configuration in which the semiconductor substrate 10 set on one main surface of the susceptor 1 is heated by the heating member from both the upper side and the lower side is, for example, a film forming apparatus 200 shown in FIG. This is the same as the film forming apparatus 201 shown in FIG.
- Example 1 is an example in which the film forming apparatus of the present invention improves the uniformity of the thin film formed and the curvature of the laminated structure.
- a main surface (upper side in FIG. 4) of a 6-inch sapphire substrate 11 (c-plane) as a semiconductor substrate 10 shown in FIG.
- Sample 1 was formed with a sapphire laminated structure 50 shown in FIG. 4 using a film forming apparatus 100 conventionally used as shown in FIG.
- the temperature T of the main surface of the sapphire substrate 11 in the sapphire laminated structure 50 is measured using a thermocouple (not shown in FIG. 6), and T when forming the low-temperature GaN 21 is 500 ° C.
- GaN 22 and AlGaN 42 were formed by using a metal organic vapor phase epitaxy method (MOVPE method) in a state where T when forming each of AlGaN 42 was 1050 ° C.
- MOVPE method metal organic vapor phase epitaxy method
- Sample 2 is heated only by heater 2 using film forming apparatus 200 according to Embodiment 1 of the present invention shown in FIG. 1, and heater 7 is not heated, so that sapphire laminated structure 50 shown in FIG. 4 is formed. did.
- the heating temperature of the heater 2 conforms to the heating temperature when the sample 1 was prepared. Specifically, the temperature T of the main surface of the sapphire substrate 11 in the sapphire laminated structure 50 is obtained using a thermocouple (not shown in FIG. 1).
- the metal organic chemical vapor deposition method MOVPE method
- MOVPE method metal organic chemical vapor deposition method
- the temperature T of the main surface of the sapphire multilayer structure 50 at this time conforms to the temperature when the sample 1 and the sample 2 are prepared.
- the temperature T of the main surface of the sapphire substrate 11 is measured, T when forming the low-temperature GaN 21 is 500 ° C., and T when forming each of the GaN 22 and AlGaN 42 is 1050 ° C.
- a GaN 22 film and an AlGaN film 42 were formed by using a metal organic chemical vapor deposition method (MOVPE method). Films were formed while adjusting the outputs (heating temperature) of the heaters 7 and 2 so that T becomes the above-described temperature and adjusting the outputs of the heaters 7 and 2 to be substantially the same. The other film forming conditions were followed when the sample 1 was formed.
- MOVPE method metal organic chemical vapor deposition method
- Sample 4 formed sapphire laminated structure 50 shown in FIG. 4 while heating both heater 2 and heater 7 using film forming apparatus 200 in Embodiment 1 of the present invention shown in FIG.
- the temperature T of the main surface of the sapphire substrate 11 in the sapphire multilayer structure 50 conforms to the temperature when the samples 1 to 3 described above are prepared.
- film formation was performed using metal organic chemical vapor deposition (MOVPE). Specifically, the output (heating temperature) of the heater 7 and the heater 2 is adjusted so that T becomes the above-described temperature, and the curvature (or warpage) of the sapphire laminated structure 50 during film formation is substantially zero. Specifically, the output ratio between the heater 7 and the heater 2 was adjusted to be approximately 67:33. The other film forming conditions were followed when the sample 1 was formed.
- MOVPE metal organic chemical vapor deposition
- the susceptor using the film forming apparatus 200 according to the present invention is also used when the film forming apparatus 100 in which the heater 2 is installed only on the lower side of the susceptor 1 (sample 1) is used.
- the same result was obtained when only the lower heater 2 of sample 1 was heated (sample 2).
- the main surface of the sapphire multilayer structure 50 is curved with a large curvature so as to be convex in the concave direction, that is, downward.
- the distribution is ⁇ 62 ⁇ / sq for sample 1 and ⁇ 52 ⁇ / sq for sample 2, indicating that the uniformity of the grown thin film is not maintained.
- the sheet resistance value of the central portion of the main surface is a relatively good result of about 433 ⁇ / sq, but as the edge approaches the edge from the central portion, the sheet resistance value increases and the distribution deteriorates. did.
- the sheet resistance value is relatively good at about 431 ⁇ / sq at the central part of the main surface, but the sheet resistance value increases as the distance from the central part approaches the edge. Worsened. Accordingly, when only the lower side of the susceptor 1 is heated, the temperature gradient (temperature difference) between the lower side and the upper side of the sapphire multilayer structure 50 increases, so that the sapphire multilayer structure 50 is greatly curved and the temperature distribution in the main surface of the sapphire multilayer structure 50 is increased. It became clear that the distribution of sheet resistance deteriorated.
- the curvature of the sapphire multilayer structure 50 during the film formation of the AlGaN 42 is reduced by heating both the upper and lower heaters of the susceptor 1 as in the sample 3, for example. Also, the sheet resistance distribution was improved to ⁇ 11 ⁇ / sq, and the uniformity of the grown thin film was improved. The sheet resistance value at the center part is also good at 426 ⁇ .
- the MOVPE apparatus capable of independently controlling the heating temperatures of the heater 7 as the first heating member and the heater 2 as the second heating member using the control unit 30 that can independently control the heating temperature.
- the homogeneity of the thin film formed on the main surface of the sapphire multilayer structure 50 could be greatly improved.
- the temperature gradient (temperature difference) between the lower and upper sides of the flow channel 3 is reduced, thereby reducing the sapphire stack.
- Generation of convection of the source gas in the atmosphere facing the main surface of the structure 50 can be suppressed. For this reason, the source gas flows stably from the upstream side to the downstream side in the pipe of the flow channel 3. Therefore, it is considered that film formation can be performed stably on the main surface of the sapphire multilayer structure 50, and characteristics such as sheet resistance distribution of the sapphire multilayer structure 50 are improved.
- both the lower and upper heaters of the main surface of the susceptor 1 are heated to reduce the temperature gradient (temperature difference) between the lower and upper sides of the main surface of the sapphire laminated structure 50, the curved shape The degree of curvature can be reduced.
- the contact state between the main surface of the sapphire multilayer structure 50 and the susceptor 1 is changed regardless of the position on the main surface of the sapphire multilayer structure 50, that is, the central portion and the edge of the sapphire multilayer structure 50 are almost the same.
- Can be constant. Therefore, the temperature of the main surface can be made substantially constant regardless of the position on the main surface.
- the thin film to be grown can be made substantially uniform by keeping the temperature distribution on the main surface substantially constant.
- the warp generated in the sapphire laminated structure 50 during the formation of the thin film is, for example, the heating conditions, thin film growth conditions such as the type and amount of source gas to be supplied, the type of sapphire laminated structure 50, and the substrate used. It varies depending on the type. For this reason, the temperature gradient (temperature difference) between the lower side and the upper side of the main surface of the susceptor 1 also changes depending on the above-described thin film growth conditions. For this reason, it is preferable to change the output ratio of the heater 7 and the heater 2 independently each time the growth conditions of the thin film are changed.
- Example 2 is an example in which the amount of warpage of the laminated structure formed by the film forming apparatus of the present invention was improved and cracks were suppressed.
- thickness is 700 ⁇ m
- the semiconductor substrate 10 see FIGS. 1 to 3 (in FIG. 5)
- 40 pairs of AlN 32 having a film thickness of 100 nm and a pair stack 62 of a GaN film having a film thickness of 25 nm and an AlN film having a film thickness of 5 nm were stacked to a total thickness of 1.2 ⁇ m.
- a sample of the silicon laminated structure 60 as an epitaxial laminated structure in which a thin film of GaN 22 having a thickness of 1.2 ⁇ m was laminated on the pair laminated layer 62 was formed by the following method.
- a nitride semiconductor epitaxial layer When a nitride semiconductor epitaxial layer is grown on the main surface of the silicon substrate 12, it protrudes downward due to a difference in thermal expansion coefficient between the silicon substrate 12 and the grown nitride semiconductor epitaxial layer when the temperature is lowered after film formation.
- the warpage of the nitride semiconductor epitaxial layer may increase, and cracks may occur in the nitride semiconductor epitaxial layer. Therefore, in Example 2, the presence or absence of warpage and cracks when the film was formed on the silicon substrate 12 was investigated.
- Sample 5 was formed with a silicon laminated structure 60 shown in FIG. 5 by using a conventional film forming apparatus 100 shown in FIG.
- the temperature T of the main surface of the silicon substrate 12 in the silicon multilayer structure 60 is measured using a thermocouple (not shown in FIG. 6), and each of the above-described T is 1050 ° C.
- the AlN 32, the pair stack 62, and the GaN 22 were formed by using a metal organic chemical vapor deposition method (MOVPE method).
- MOVPE method metal organic chemical vapor deposition method
- the sample 6 is heated only by the heater 2 using the film forming apparatus 200 according to Embodiment 1 of the present invention shown in FIG. 1, and the silicon laminated structure 60 shown in FIG. 5 is formed without heating the heater 7. did.
- the heating temperature of the heater 2 is in accordance with the heating temperature when the sample 5 is prepared. Specifically, the temperature T of the main surface of the silicon substrate 12 in the silicon laminated structure 60 using a thermocouple not shown in FIG.
- the film was formed with AlN32, the pair stack 62, and GaN22 by using the metal organic vapor phase epitaxy (MOVPE method) in the state where T when forming each of the above films was 1050 ° C. The other film forming conditions were followed when the sample 5 was formed.
- MOVPE method metal organic vapor phase epitaxy
- Sample 7 is heated only by heater 7 using film forming apparatus 200 according to Embodiment 1 of the present invention shown in FIG. 1, and heater 2 is not heated to form silicon laminated structure 60 shown in FIG. did.
- the heating temperature of the heater 7 is in accordance with the heating temperature when the sample 5 is prepared. Specifically, the temperature T of the main surface of the silicon substrate 12 in the silicon laminated structure 60 using a thermocouple not shown in FIG.
- the film was formed with AlN32, the pair stack 62, and GaN22 by using the metal organic vapor phase epitaxy (MOVPE method) in the state where T when forming each of the above films was 1050 ° C. The other film forming conditions were followed when the sample 5 was formed.
- MOVPE method metal organic vapor phase epitaxy
- the susceptor using the film forming apparatus 200 of the present invention is also used when the film forming apparatus 100 in which the heater 2 is installed only on the lower side of the susceptor 1 is used (sample 5).
- the same result was obtained when only the lower heater 2 of sample 1 was heated (sample 6).
- the main surface of the silicon substrate 12 that will later become the silicon laminated structure 60 has a large curvature (both 40 km) so as to be convex in the concave direction, that is, downward. Curved at -1 ).
- a large warp of about 100 ⁇ m occurred and cracks occurred.
- the silicon laminated structure 60 is later formed when the temperature of the silicon substrate 12 is raised to 1050 ° C.
- the main surface of the silicon substrate 12 is curved in a convex direction, that is, so that the central portion is warped upward (convex upward), and the absolute value of the curvature is 30 km ⁇ 1 .
- the warpage was 30 ⁇ m, which was significantly smaller than samples 5 and 6, and no cracks were generated.
- the nitride semiconductor epitaxial layer on the silicon substrate 12 warps in the concave direction when the temperature falls due to the difference in thermal expansion coefficient between silicon and the nitride semiconductor, and cracks are likely to occur.
- the silicon laminated structure 60 is greatly curved in the concave direction. It was found that the warpage of the silicon laminated structure 60 after growth and the occurrence of cracks can be suppressed by suppressing (correcting) the bending in the concave direction of the film, but rather in the convex direction.
- the silicon laminated structure 60 tends to warp in the concave direction. Therefore, suppressing the warping in the concave direction reduces the occurrence of cracks. It can also be connected.
- the film forming apparatus of the present invention is particularly excellent as a technique for improving the uniformity of the film quality of the substrate by improving the warp of the substrate on which the film is formed and suppressing cracks in the substrate.
Abstract
Description
図1に示すように、本発明の実施の形態1における気相成長による成膜装置200は基板、たとえば半導体基板10であるウェハをセットするためのサセプタ1の上側に、サセプタ1の上側の主表面に対向するように配置された第1の加熱部材としてのヒーター7を備えている。また、図1に示すように、サセプタ1の上側に存在するヒーター7と、サセプタ1とに挟まれた領域には加熱治具6が配置されている。なお、ここで主表面とは、たとえば半導体基板10やサセプタ1などの表面のうち最も面積の大きい、水平方向に沿った方向にセットされている表面をいう。また、ここでは成長と成膜とはほぼ同義として用いる。
図2に示すように、本発明の実施の形態2における気相成長による成膜装置301は基板、たとえば半導体基板10の一方の主表面上に成膜させたい薄膜を構成する成分の蒸気を照射するためのクヌーセンセル71およびクヌーセンセル72と呼ばれる筒状の先端にピンホールが空いた材料容器を備えた構成となっている。また、図示しないが成膜装置301は装置内を真空にする機能を備えている。
Claims (9)
- 基板(10)を保持するサセプタ(1)と、
前記サセプタ(1)の一方の主表面に対向するように配置された第1の加熱部材(7)と、
前記サセプタ(1)の、前記一方の主表面と反対側に位置する他方の主表面に対向するように配置された第2の加熱部材(2)と、
前記第1の加熱部材(7)および前記第2の加熱部材(2)のそれぞれの加熱温度を独立に制御可能な制御部(30)とを備える、成膜装置(200,201,301)。 - 基板(10)を保持するサセプタ(1)と、
前記サセプタ(1)の一方の主表面に対向するように配置された第1の加熱部材(7)と、
前記サセプタ(1)の、前記一方の主表面と反対側に位置する他方の主表面に対向するように配置された第2の加熱部材(2)と、
前記第1の加熱部材(7)および前記第2の加熱部材(2)のそれぞれの加熱温度を独立に制御可能な制御部(30)とを備えており、
前記第1の加熱部材(7)および前記第2の加熱部材(2)は、一方のみを加熱することも、両方を加熱することも可能な成膜装置(200,201,301)。 - 前記基板(10)の曲率または反りを測定する測定部(5)をさらに備え、
前記基板(10)の曲率または反りを測定した結果に応じて、前記第1の加熱部材(7)および前記第2の加熱部材(2)のそれぞれの加熱温度を独立に制御する、請求の範囲第1項に記載の成膜装置(200,201,301)。 - 前記基板(10)の一方の主表面上に、成膜させたい薄膜(21,22,32,42,62)を構成する成分の原料ガスを供給する、請求の範囲第1項に記載の成膜装置(200,201,301)。
- 前記原料ガスは塩化物ガスを含む、請求の範囲第4項に記載の成膜装置(200,201,301)。
- 前記原料ガスは非金属材料の水素化物ガスを含む、請求の範囲第4項に記載の成膜装置(200,201,301)。
- 前記原料ガスは有機金属化合物の蒸気を含む、請求の範囲第4項に記載の成膜装置(200,201,301)。
- 前記薄膜(21,22,32,42,62)は、III族窒化物半導体である、請求の範囲第4項に記載の成膜装置(200,201,301)。
- 前記基板(10)の一方の主表面上に、成膜させたい薄膜(21,22,32,42,62)を構成する成分の蒸気を真空中で堆積させる、請求の範囲第1項に記載の成膜装置(200,201,301)。
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PCT/JP2009/063939 WO2011016121A1 (ja) | 2009-08-06 | 2009-08-06 | 成膜装置 |
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JP6789187B2 (ja) * | 2017-07-07 | 2020-11-25 | 東京エレクトロン株式会社 | 基板反り検出装置及び基板反り検出方法、並びにこれらを用いた基板処理装置及び基板処理方法 |
US20230359128A1 (en) * | 2022-05-03 | 2023-11-09 | Tokyo Electron Limited | In-situ lithography pattern enhancement with localized stress treatment tuning using heat zones |
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Also Published As
Publication number | Publication date |
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CN102473607A (zh) | 2012-05-23 |
US20120006263A1 (en) | 2012-01-12 |
KR20120052287A (ko) | 2012-05-23 |
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