WO2006068127A1 - エピタキシャルシリコンウェハの製造方法 - Google Patents
エピタキシャルシリコンウェハの製造方法 Download PDFInfo
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- WO2006068127A1 WO2006068127A1 PCT/JP2005/023342 JP2005023342W WO2006068127A1 WO 2006068127 A1 WO2006068127 A1 WO 2006068127A1 JP 2005023342 W JP2005023342 W JP 2005023342W WO 2006068127 A1 WO2006068127 A1 WO 2006068127A1
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- Prior art keywords
- substrate
- oxide film
- hydrofluoric acid
- silicon wafer
- epitaxial silicon
- Prior art date
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims description 47
- 229910052710 silicon Inorganic materials 0.000 title claims description 47
- 239000010703 silicon Substances 0.000 title claims description 47
- 238000004519 manufacturing process Methods 0.000 title claims description 31
- 239000000758 substrate Substances 0.000 claims abstract description 217
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 120
- 238000004140 cleaning Methods 0.000 claims abstract description 51
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 36
- 230000007547 defect Effects 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 17
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000000407 epitaxy Methods 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 238000010438 heat treatment Methods 0.000 abstract description 12
- 239000007864 aqueous solution Substances 0.000 description 36
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 239000007789 gas Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 10
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 101150008672 csn-1 gene Proteins 0.000 description 3
- 239000005871 repellent Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000005247 gettering Methods 0.000 description 2
- QOSATHPSBFQAML-UHFFFAOYSA-N hydrogen peroxide;hydrate Chemical compound O.OO QOSATHPSBFQAML-UHFFFAOYSA-N 0.000 description 2
- 238000001451 molecular beam epitaxy Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003376 silicon Chemical class 0.000 description 1
- 238000000927 vapour-phase epitaxy Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/324—Thermal treatment for modifying the properties of semiconductor bodies, e.g. annealing, sintering
-
- 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
-
- 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
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/02—Elements
- C30B29/06—Silicon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02041—Cleaning
- H01L21/02043—Cleaning before device manufacture, i.e. Begin-Of-Line process
- H01L21/02052—Wet cleaning only
-
- 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
-
- 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
- H01L21/02524—Group 14 semiconducting materials
- H01L21/02532—Silicon, silicon germanium, germanium
-
- 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
- H01L21/02656—Special treatments
- H01L21/02658—Pretreatments
Definitions
- the present invention relates to a method of manufacturing an epitaxial silicon wafer.
- an epitaxial silicon wafer having a silicon single crystal substrate and an epitaxial layer formed on the surface of the substrate is known.
- the substrate is doped with nitrogen to form oxygen precipitation nuclei inside the substrate, metal impurities are captured in the oxygen precipitation nuclei, and the metal impurities are removed by gettering.
- COP Crystal Originated Particle
- SF SF
- FIG. 4A a force in which COP (Crystal Originated Particle) 111, which is a micro defect, is present on the surface and inside of the substrate 11 doped with such nitrogen is exposed on the surface of the substrate 11 COPl ll (COP opened toward the substrate surface) causes SF (stacking fault) in the epitaxial layer 12.
- Reference numeral 13 in FIG. 4A denotes an oxide film.
- a method for removing COP 111 exposed on the surface of the substrate 11 includes heat treatment.
- FIGS. 4B and 4C in the substrate 11 doped with nitrogen, the shape of the COPll is easily held by the inner wall oxide film 112 remaining in the COP11 11. COPll cannot be removed by heat treatment alone. Therefore, as shown in FIG. 4D, a stacking fault 121 occurs in the epitaxial layer 12.
- An oxide film is formed.
- Patent Document 1 JP 2002-20200 A (Pages 2-5)
- An object of the present invention is to provide a method for manufacturing an epitaxial silicon wafer that can sufficiently reduce the number of stacking faults in an epitaxial layer.
- the oxide film 13 on the surface of the substrate 11 and the COP 111 opened on the surface of the substrate 11 are formed.
- the inner wall oxide film 112 inside (111A) is removed.
- the inner wall oxide film 112 inside the COP111A is exposed to the surface of the substrate 11 and is removed by cleaning with hydrofluoric acid aqueous solution!
- the inner wall oxide film 112 of COP111B has not been removed by cleaning with a hydrofluoric acid aqueous solution.
- the present invention has been devised based on such knowledge.
- the manufacturing method of the epitaxial silicon wafer of the present invention includes a substrate manufactured by the Tjoklarski method, obtained by cutting out a silicon single crystal doped with nitrogen, and an epitaxial formed on the substrate.
- a method of manufacturing an epitaxial silicon wafer comprising: a hydrofluoric acid cleaning step of cleaning the substrate with a liquid containing hydrofluoric acid; and defects in the substrate that are not exposed on the surface of the substrate.
- the defects located inside the substrate are not exposed on the substrate surface, and the substrate surface is exposed.
- An oxide film is formed. In other words, the oxide film is formed on the substrate surface without substantially etching the substrate surface.
- the substrate surface contains hydrogen peroxide. It is preferable to form an oxide film on the surface of the substrate by washing with a solution or ozone aqueous solution.
- the substrate surface is coated with a solution containing hydrogen peroxide (for example, hydrogen peroxide solution, a mixed solution of hydrogen peroxide and hydrochloric acid, etc.) or ozone.
- a solution containing hydrogen peroxide for example, hydrogen peroxide solution, a mixed solution of hydrogen peroxide and hydrochloric acid, etc.
- ozone By washing with an aqueous solution, an oxide film can be formed without exposing defects located inside the substrate to the surface of the substrate.
- the substrate in the hydrofluoric acid cleaning step, is cleaned using a rotary cleaning device, and the rotary cleaning device supplies a liquid containing hydrofluoric acid to one surface of the substrate.
- Dropping means for dropping, supporting means for supporting the other surface of the substrate, and rotating means for rotating the substrate with the axis passing through the surface of the substrate supported by the supporting means as a rotation center axis It is preferable that the substrate is cleaned by dropping the liquid containing hydrofluoric acid while the substrate is rotated by the rotating unit at a rotation speed of 10 rotations Z or less.
- the substrate surface is water-repellent and the substrate rotation speed exceeds 10 rotations Z, the liquid containing hydrofluoric acid dripped onto the substrate surface is blown out by the rotation of the substrate.
- the oxide film on the substrate surface and the inner wall oxide film in the defect opened on the substrate surface cannot be removed with the liquid containing hydrofluoric acid.
- the liquid containing hydrofluoric acid dropped on the substrate surface is less likely to be blown out of the substrate, and the liquid containing hydrofluoric acid is Since it exists on the surface, the oxide film on the substrate surface and the inner wall oxide film in the defect on the substrate surface can be surely removed.
- FIG. 1 is a flowchart showing a manufacturing process of an epitaxial silicon wafer that is useful for an embodiment of the present invention.
- FIG. 2A is a schematic view showing each step of manufacturing the epitaxial silicon wafer.
- FIG. 2B is a schematic diagram showing each process of manufacturing the epitaxial silicon wafer.
- FIG. 2C is a schematic view showing each step of manufacturing the epitaxial silicon wafer.
- FIG. 2D is a schematic view showing each step of manufacturing the epitaxial silicon wafer.
- FIG. 2E is a schematic view showing each step of manufacturing the epitaxial silicon wafer.
- FIG. 2F is a schematic view showing each step of manufacturing the epitaxial silicon wafer.
- FIG. 3 is a schematic view showing a cleaning apparatus used in the manufacturing method of the epitaxial silicon wafer.
- FIG. 4A is a schematic diagram showing a manufacturing process of a conventional epitaxial silicon wafer.
- FIG. 4B is a schematic diagram showing a manufacturing process of a conventional epitaxial silicon wafer.
- FIG. 4C is a schematic diagram showing a manufacturing process of a conventional epitaxial silicon wafer.
- FIG. 4D is a schematic diagram showing a manufacturing process of a conventional epitaxial silicon wafer.
- FIG. 5A is a schematic diagram showing a manufacturing process of a conventional epitaxial silicon wafer.
- FIG. 5B is a schematic diagram showing a manufacturing process of a conventional epitaxial silicon wafer.
- FIG. 5C is a schematic diagram showing a manufacturing process of a conventional epitaxial silicon wafer.
- FIG. 5D is a schematic diagram showing a manufacturing process of a conventional epitaxial silicon wafer.
- FIG. 5E is a schematic view showing a manufacturing process of a conventional epitaxial silicon wafer.
- FIG. 5F is a schematic diagram showing a manufacturing process of a conventional epitaxial silicon wafer.
- the method for manufacturing an epitaxial silicon wafer includes a hydrofluoric acid cleaning process (Process S1), an oxide film forming process (Process S 2), and an epitaxial layer forming process (Process S3). To do.
- the epitaxial silicon wafer 1 includes a substrate 11 and an epitaxial layer 12 formed on the substrate 11.
- the substrate 11 of the epitaxial silicon wafer 1 is manufactured by growing a silicon single crystal ingot doped with nitrogen by the CZ method and cutting the ingot.
- the concentration of nitrogen in the substrate 11 is preferably 1 ⁇ 10 14 atoms / cm 3 or less, particularly at a concentration at which OSF nuclei (oxygen-induced stacking faults) are not exposed on the substrate surface.
- the substrate grown and cut by the CZ method is subjected to processing such as chamfering, surface grinding, and polishing to become a substrate 11 having a mirror-finished surface.
- a defect COP11 K111A is exposed on the surface of the substrate 11.
- the edges 0 to 111 (1118) are also present inside the substrate 11.
- each C An inner wall oxide film 112 is formed in OP 111 (111 A, 11 IB).
- An oxide film 13 is formed on the surface of the substrate 11.
- the surface of the substrate 11 thus cleaned is washed with a hydrofluoric acid aqueous solution (processing S1). As shown in FIG. 2B, the cleaning with the hydrofluoric acid aqueous solution removes the oxide film 13 on the surface of the substrate 11, and the oxide film 112 in the COP 111A exposed on the surface of the substrate 11 is removed. It will be.
- a rotary cleaning device 3 shown in FIG. 3 is used.
- the rotary cleaning apparatus 3 includes a holding unit 31 that holds the substrate 11, a rotating unit 32 that rotates the holding unit 31, and a dropping unit 33 that drops the hydrofluoric acid aqueous solution 35 on one surface of the substrate 11. Is provided.
- the holding means 31 includes an inner chuck 311 that abuts on the other surface of the substrate 11 and holds the substrate 11, and an outer chuck 312 disposed outside the inner chuck 311.
- the inner chuck 311 has a hollow frustum shape.
- the inner chuck 311 has an upper surface (surface on the substrate 11 side) having a larger diameter than the lower surface.
- the outer chuck 312 has a hollow truncated cone shape larger than the inner chuck 311, and the upper surface on the substrate 11 side is open. Accordingly, a gap is formed between the outer chuck 312 and the inner chuck 311.
- the gas 34 injected into the rotary shaft 321 is discharged from the rotary shaft 321 into the gap. Therefore, this gap forms a part of the discharge path T of the gas 34 described later. From the outlet T1 of the discharge path T, the gas 34 is discharged toward the peripheral edge of the substrate 11 installed on the inner chuck 311.
- the outer chuck 312 has a structure that can move relative to the inner chuck 311 in the vertical direction (arrow Y direction).
- a hydraulic cylinder 313 or the like is provided on the outer chuck 312 and the outer chuck 312 is moved up and down.
- the tip of the piston 313B is fixed to the lower surface of the inner chuck 311.
- the outer chuck 312 is opposed to the inner chuck 311.
- the rotating means 32 rotates the inner chuck 311 of the holding means 31.
- the rotating means 32 includes a rotating shaft 321 attached to the lower surface of the inner chuck 311 and a driving device (not shown) that rotationally drives the rotating shaft 321.
- the rotating shaft 321 has a hollow structure, and its upper end is fixed to the lower surface of the inner chuck 311.
- the rotation center axis 321B of the rotation axis 321 passes through the plane center position of the surface of the substrate.
- a hole 321A is formed in the vicinity of the upper end of the rotating shaft 321, and the gas 34 into which the lower end force of the rotating shaft 321 has also been injected passes through the rotating shaft 321 and through the hole 321A, the inner chuck 311 and the outer chuck 321A. The gap between the chucks 312 is filled. Then, gas 34 is discharged from the outlet T1. That is, the inside of the rotating shaft 321 and the gaps between the inner chuck 311 and the outer chuck 312 constitute the gas 34 discharge path T.
- the gas 34 As the gas 34 is discharged from the outlet T1 of the discharge path T, a negative pressure is generated on the other surface side of the substrate 11. Due to this negative pressure, the other surface force of the substrate 11 comes into contact with the upper surface of the inner chuck 311 and the substrate 11 is fixed to the inner chuck 311.
- dry oxygen is used as the gas 34. Is done.
- the dropping unit 33 includes a nozzle 331 that drops the hydrofluoric acid aqueous solution 35 onto the substrate 11.
- the nozzle 331 is disposed opposite to the inner chuck 311, and the discharge port of the nozzle 331 is disposed coaxially with the plane center of the substrate 11, that is, the rotation center axis 321 B.
- the hydrofluoric acid aqueous solution 35 is dropped from the nozzle 331 while the substrate 11 is rotating, the hydrofluoric acid aqueous solution 35 is diffused by the centrifugal force and the central force of the substrate 11 is also directed toward the peripheral portion. As shown in the figure, the other surface side of the substrate 11 is turned around along the peripheral edge.
- the concentration of the hydrofluoric acid aqueous solution 35 is not particularly limited, but can be, for example, about 1% to 10%.
- the substrate 11 is set on the inner chuck 311.
- gas 34 is injected into the rotary shaft 321, and between the rotary shaft 321, the inner chuck 311 and the outer chuck 312. Gas 34 is discharged from outlet T1 through the gap.
- the rotary shaft 321 is rotationally driven, and then the hydrofluoric acid aqueous solution 35 is dropped from the nozzle 331 of the dropping means 33.
- the rotation speed of the rotating shaft 321, that is, the rotation speed of the substrate 11 is 10 rotations Z or less, preferably 2 rotations Z or less.
- the hydrofluoric acid aqueous solution 35 diffuses from the center edge of the substrate 11 toward the peripheral edge, and passes around the peripheral edge to the other surface side of the substrate 11.
- the amount of the hydrofluoric acid aqueous solution 35 that wraps around the other surface of the substrate 11 depends on the number of rotations of the substrate 11, the discharge amount of the hydrofluoric acid aqueous solution 35, the viscosity of the hydrofluoric acid aqueous solution 35, and the discharge pressure from the gas outlet T1. Can be adjusted.
- an oxide film 13 is formed on the surface of the substrate 11 (processing S2). Since the surface of the substrate 11 cleaned with the hydrofluoric acid aqueous solution 35 tends to adhere to the particles formed by the oxide film, it is necessary to form the oxide film 13.
- an oxide film is formed using the rotary cleaning device 3 used in the hydrofluoric acid cleaning process.
- the substrate 11 is placed on the inner chuck 311, the gas 34 is injected into the rotating shaft 321, and the gas 34 passes through the gap between the rotating shaft 321 and the inner chuck 311 and the outer chuck 312. From the outlet T1.
- the rotary shaft 321 is rotationally driven, and then ozone water is dropped from the nozzle 331 of the dropping means 33.
- the rotational speed of the rotating shaft 321, that is, the rotational speed of the substrate 11 is about 500 revolutions Z.
- an epitaxial layer 12 is formed on the surface of the substrate 11 (processing S3).
- the substrate 11 is heat-treated.
- the substrate 11 is heat-treated in a hydrogen atmosphere.
- the oxide film 13 on the surface of the substrate 11 is removed. Then, COP111A on the surface of the substrate 11 is smoothed, and COP111A on the surface of the substrate 11 disappears.
- the epitaxial layer 12 is formed on the surface of the substrate 11.
- the substrate 11 is set in an epitaxial layer growth apparatus (not shown), and the substrate 11 is formed on the substrate 11 by using a metal organic vapor phase epitaxy method (MOCVD method), a molecular beam epitaxy method (MBE method), or the like.
- MOCVD method metal organic vapor phase epitaxy method
- MBE method molecular beam epitaxy method
- a epitaxial layer 12 is formed.
- the substrate 11 is washed with a hydrofluoric acid aqueous solution 35, and then the surface of the substrate 11 is washed with ozone water to form the oxide film 13 on the surface of the substrate 11.
- the oxide film 13 can be formed on the surface of the substrate 11 without exposing the COP 111B, which is a defect located inside the substrate 11, to the surface of the substrate 11.
- the oxide film 13 can be formed on the surface of the substrate 11 without substantially etching the surface of the substrate 11.
- the oxide film 13 is formed, the COP 111B that is a defect inside the substrate 11 is not exposed to the surface of the substrate 11.
- COP111A on the surface of the substrate 11 can be surely lost, and COP111B existing in the substrate 11 is not exposed and remains on the surface of the substrate 11.
- the epitaxial layer 12 is formed, the occurrence of defects in the epitaxial layer 12 can be reduced.
- the rotation speed of the substrate 11 is set to 10 rotations Z or less, the hydrofluoric acid aqueous solution 35 dropped on the surface of the substrate 11 is blown out of the substrate 11, and the hydrofluoric acid Since the aqueous solution 35 exists on the surface of the substrate 11, the oxide film 13 on the surface of the substrate 11 and the inner wall oxide film 112 of the COP 111 on the surface of the substrate 11 can be surely removed.
- the rotary cleaning device 3 is used in the hydrofluoric acid cleaning process and the oxide film forming process.
- the rotary cleaning apparatus 3 processes the substrates 11 one by one.
- the substrates 11 are processed one by one, and the so-called single-wafer rotary cleaning device 3 is used, so that the substrates 11 may be contaminated by other substrates. There is no.
- the rotary cleaning device 3 processes the substrate 11 one by one, the rotary cleaning device 3 is smaller than the case where a liquid bath is provided to immerse a plurality of substrates 11 at a time. Can be achieved.
- force for cleaning the substrate 11 using the rotary cleaning device 3 shown in FIG. 3 does not have to use such a rotary cleaning device 3.
- store the fluorine solution in a bath and wash the substrate by immersing the substrate in the bath.
- ozone water may be accumulated in the tank, and the substrate may be immersed in the ozone water in the tank.
- the force for forming the oxide film on the substrate surface using ozone water in the oxide film forming step is not limited to this. That is, on the surface of the substrate 11 Any liquid can be used as long as it does not expose the unexposed defects in the substrate 11 to the surface of the substrate 11 and forms the oxide film 13 on the surface of the substrate 11.
- the oxide film 13 can be formed on the surface of the substrate 11 using hydrogen peroxide water.
- the oxide film 13 is formed on the surface of the substrate 11 without exposing the defects inside the substrate 11 to the surface of the substrate 11. Since it can be formed, the same effect as the above embodiment can be obtained. That is, the number of stacking faults in the epitaxial layer 12 can be sufficiently reduced.
- the oxide film 13 can be formed on the surface of the substrate 11 without exposing the defects inside the substrate 11 not exposed on the surface of the substrate 11 to the surface of the substrate 11.
- An epitaxial silicon wafer was manufactured by the same method as in the previous embodiment. (Hydrofluoric acid cleaning process)
- This silicon single crystal substrate has a diameter of 300 mm and is P-type doped with boron in addition to nitrogen.
- the resistivity is 10 ⁇ 'cm.
- the substrate was washed with a hydrofluoric acid aqueous solution to remove the oxide film on the substrate surface, and the inner wall oxide film in the COP exposed on the substrate surface was removed.
- a hydrofluoric acid aqueous solution For cleaning the substrate, the rotary cleaning apparatus used in the above embodiment was used.
- the concentration of the hydrofluoric acid aqueous solution was 10%
- the rotation speed of the substrate was 2 rotations Z minutes
- the treatment time was 90 seconds.
- the substrate surface cleaned with a hydrofluoric acid aqueous solution was cleaned with ozone water to form an oxide film. Cleaning was performed using the same rotary cleaning apparatus as in the above embodiment.
- the concentration of ozone water was 20 ppm, and the rotation speed of the substrate was set to 500 rotations Z minutes.
- an epitaxial layer having a thickness of 4 / zm was formed while heating the substrate at 1130 ° C. Thereby, an epitaxial silicon wafer was obtained.
- the number of SF (stacking faults) in the epitaxial layer of the obtained epitaxial silicon wafer was counted and found to be 5.
- the present invention can be used in a method for manufacturing an epitaxial silicon wafer.
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- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
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- General Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/793,155 US7537658B2 (en) | 2004-12-24 | 2005-12-20 | Method for producing epitaxial silicon wafer |
DE112005003233.7T DE112005003233B4 (de) | 2004-12-24 | 2005-12-20 | Verfahren zur Herstellung eines epitaktischen Silizium-Wafers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004-374094 | 2004-12-24 | ||
JP2004374094A JP4824926B2 (ja) | 2004-12-24 | 2004-12-24 | エピタキシャルシリコンウェハの製造方法 |
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WO2006068127A1 true WO2006068127A1 (ja) | 2006-06-29 |
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PCT/JP2005/023342 WO2006068127A1 (ja) | 2004-12-24 | 2005-12-20 | エピタキシャルシリコンウェハの製造方法 |
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US (1) | US7537658B2 (ja) |
JP (1) | JP4824926B2 (ja) |
DE (1) | DE112005003233B4 (ja) |
TW (1) | TWI267915B (ja) |
WO (1) | WO2006068127A1 (ja) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080213418A1 (en) * | 2000-07-18 | 2008-09-04 | Hua Tan | Align-transfer-imprint system for imprint lithogrphy |
JP4824926B2 (ja) * | 2004-12-24 | 2011-11-30 | Sumco Techxiv株式会社 | エピタキシャルシリコンウェハの製造方法 |
TW200802552A (en) * | 2006-03-30 | 2008-01-01 | Sumco Techxiv Corp | Method of manufacturing epitaxial silicon wafer and apparatus thereof |
JP4827587B2 (ja) * | 2006-03-31 | 2011-11-30 | Sumco Techxiv株式会社 | シリコンウェーハの製造方法 |
JP5275585B2 (ja) | 2007-06-18 | 2013-08-28 | Sumco Techxiv株式会社 | エピタキシャルシリコンウェハの製造方法 |
US20090189159A1 (en) * | 2008-01-28 | 2009-07-30 | Atmel Corporation | Gettering layer on substrate |
US7972922B2 (en) | 2008-11-21 | 2011-07-05 | Freescale Semiconductor, Inc. | Method of forming a semiconductor layer |
US8747092B2 (en) | 2010-01-22 | 2014-06-10 | Nanonex Corporation | Fast nanoimprinting apparatus using deformale mold |
WO2014145826A2 (en) | 2013-03-15 | 2014-09-18 | Nanonex Corporation | System and methods of mold/substrate separation for imprint lithography |
US10105883B2 (en) | 2013-03-15 | 2018-10-23 | Nanonex Corporation | Imprint lithography system and method for manufacturing |
US11011355B2 (en) * | 2017-05-12 | 2021-05-18 | Lam Research Corporation | Temperature-tuned substrate support for substrate processing systems |
Citations (5)
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JPH11168106A (ja) * | 1997-09-30 | 1999-06-22 | Fujitsu Ltd | 半導体基板の処理方法 |
JPH11274162A (ja) * | 1998-03-19 | 1999-10-08 | Sumitomo Metal Ind Ltd | 半導体基板とその製造方法 |
JP2002020200A (ja) * | 2000-07-03 | 2002-01-23 | Sumitomo Metal Ind Ltd | エピタキシャルシリコンウェーハの製造方法 |
JP2004119446A (ja) * | 2002-09-24 | 2004-04-15 | Shin Etsu Handotai Co Ltd | アニールウエーハの製造方法及びアニールウエーハ |
JP2005244127A (ja) * | 2004-02-27 | 2005-09-08 | Sumitomo Mitsubishi Silicon Corp | エピタキシャルウェーハの製造方法 |
Family Cites Families (4)
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EP1133590B1 (en) | 1998-10-14 | 2003-12-17 | MEMC Electronic Materials, Inc. | Epitaxial silicon wafers substantially free of grown-in defects |
EP1132951A1 (en) | 2000-03-10 | 2001-09-12 | Lucent Technologies Inc. | Process of cleaning silicon prior to formation of the gate oxide |
CN1260405C (zh) * | 2000-09-19 | 2006-06-21 | Memc电子材料有限公司 | 基本上没有氧化诱生堆垛层错的掺氮硅 |
JP4824926B2 (ja) * | 2004-12-24 | 2011-11-30 | Sumco Techxiv株式会社 | エピタキシャルシリコンウェハの製造方法 |
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2004
- 2004-12-24 JP JP2004374094A patent/JP4824926B2/ja active Active
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2005
- 2005-10-27 TW TW094137635A patent/TWI267915B/zh active
- 2005-12-20 US US11/793,155 patent/US7537658B2/en active Active
- 2005-12-20 WO PCT/JP2005/023342 patent/WO2006068127A1/ja not_active Application Discontinuation
- 2005-12-20 DE DE112005003233.7T patent/DE112005003233B4/de active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH11168106A (ja) * | 1997-09-30 | 1999-06-22 | Fujitsu Ltd | 半導体基板の処理方法 |
JPH11274162A (ja) * | 1998-03-19 | 1999-10-08 | Sumitomo Metal Ind Ltd | 半導体基板とその製造方法 |
JP2002020200A (ja) * | 2000-07-03 | 2002-01-23 | Sumitomo Metal Ind Ltd | エピタキシャルシリコンウェーハの製造方法 |
JP2004119446A (ja) * | 2002-09-24 | 2004-04-15 | Shin Etsu Handotai Co Ltd | アニールウエーハの製造方法及びアニールウエーハ |
JP2005244127A (ja) * | 2004-02-27 | 2005-09-08 | Sumitomo Mitsubishi Silicon Corp | エピタキシャルウェーハの製造方法 |
Also Published As
Publication number | Publication date |
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TW200623254A (en) | 2006-07-01 |
US7537658B2 (en) | 2009-05-26 |
JP4824926B2 (ja) | 2011-11-30 |
DE112005003233B4 (de) | 2018-08-30 |
JP2006179831A (ja) | 2006-07-06 |
US20080131605A1 (en) | 2008-06-05 |
DE112005003233T5 (de) | 2007-10-31 |
TWI267915B (en) | 2006-12-01 |
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