WO2016027416A1 - 多結晶シリコン棒の製造方法および多結晶シリコン棒 - Google Patents
多結晶シリコン棒の製造方法および多結晶シリコン棒 Download PDFInfo
- Publication number
- WO2016027416A1 WO2016027416A1 PCT/JP2015/003759 JP2015003759W WO2016027416A1 WO 2016027416 A1 WO2016027416 A1 WO 2016027416A1 JP 2015003759 W JP2015003759 W JP 2015003759W WO 2016027416 A1 WO2016027416 A1 WO 2016027416A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polycrystalline silicon
- silicon rod
- plate
- diffraction
- sample
- Prior art date
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/02—Silicon
- C01B33/021—Preparation
- C01B33/027—Preparation by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material
- C01B33/035—Preparation by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material by decomposition or reduction of gaseous or vaporised silicon compounds in the presence of heated filaments of silicon, carbon or a refractory metal, e.g. tantalum or tungsten, or in the presence of heated silicon rods on which the formed silicon is deposited, a silicon rod being obtained, e.g. Siemens process
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/02—Silicon
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
- G01N23/203—Measuring back scattering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
- G01N23/207—Diffractometry using detectors, e.g. using a probe in a central position and one or more displaceable detectors in circumferential positions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/225—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using electron or ion
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/60—Compounds characterised by their crystallite size
Definitions
- the present invention relates to a technique for producing polycrystalline silicon. More specifically, the present invention relates to a technique for producing high-quality polycrystalline silicon that makes it possible to control the crystal grain size, crystal orientation, and thermal diffusivity of polycrystalline silicon within desired ranges.
- High-purity and high-quality silicon substrates are indispensable semiconductor materials for manufacturing today's semiconductor devices.
- Such a silicon substrate is manufactured by a CZ method or an FZ method using polycrystalline silicon as a raw material, and semiconductor grade polycrystalline silicon is often manufactured by a Siemens method (for example, Patent Document 1 (Japanese Patent Publication No. 2004-2000)). No. 532786).
- the Siemens method is a method in which a silane source gas such as trichlorosilane or monosilane is brought into contact with a heated silicon core wire, and polycrystalline silicon is vapor-deposited (deposited) on the surface of the silicon core wire by a CVD (Chemical Vapor Deposition) method. ).
- the reaction temperature in the bell jar is about 900 ° C. to 1200 ° C. in order to increase the gas concentration of trichlorosilane as much as possible and increase the deposition rate of polycrystalline silicon. Controlled to range.
- the crystal grain size, crystal orientation and thermal diffusivity of polycrystalline silicon are the most basic and important characteristic values. This is because the meltability and melting rate of polycrystalline silicon during the production of single crystal silicon depend on these characteristic values, and thus directly affect the crystal quality of single crystal silicon.
- polycrystalline silicon is a raw material for producing single crystal silicon by the FZ method
- a non-oriented material having a small crystal grain size tends to be preferred.
- the above general tendency is not absolute, and even when polycrystalline silicon is used as a raw material for producing single crystal silicon by the CZ method, for example, when it is desired to shorten the melting time in a quartz crucible, A relatively small particle size may be preferred. In addition, when it is desired to reduce the supply power for melting, non-oriented ones may be preferred.
- Patent Document 2 Japanese Unexamined Patent Application Publication No. 2014-031297 by the present inventors selected polycrystalline silicon suitable as a raw material for producing single crystal silicon with high quantitativeness and reproducibility, An electron backscatter diffraction image obtained by irradiating an electron beam onto a main surface of a plate-like sample collected from a polycrystalline silicon rod, which is an invention aimed at providing a technique that contributes to stable production of silicon.
- the total area of the regions where crystal grains having a grain size of 0.5 ⁇ m or more are not detected is 10% or less of the entire area irradiated with the electron beam (Condition 1), and the grain size is 0.5 ⁇ m.
- a polycrystalline silicon rod that simultaneously satisfies the condition that the number of crystal grains in the range of less than 3 ⁇ m is 45% or more of the total number of detected crystal grains (Condition 2) is selected as a raw material for producing single crystal silicon. Hand to do There has been disclosed.
- Patent Document 3 Japanese Patent Laid-Open No. 2013-217653 by the present inventors selected polycrystalline silicon suitable as a raw material for producing single crystal silicon with high quantitativeness and reproducibility, The invention aims to provide a technique that contributes to stable production of silicon, and uses polycrystalline silicon as a plate-like sample, and the plate-like shape is located at a position where Bragg reflection from the mirror index surface ⁇ hkl> is detected.
- the sample is arranged, and the X-ray irradiation region defined by the slit is rotated in-plane at a rotation angle ⁇ around the center of the disk-shaped sample so that the main surface of the disk-shaped sample is ⁇ -scanned,
- a chart showing the dependence of the Bragg reflection intensity from the mirror index surface ⁇ hkl> on the rotation angle ( ⁇ ) of the plate-like sample is obtained, and the degree of crystal orientation of polycrystalline silicon is determined by the number of peaks appearing on the chart.
- Patent Document 4 Japanese Patent Laid-Open No. 2014-034506 by the present inventors selected polycrystalline silicon suitable as a raw material for producing single crystal silicon with high quantitativeness and reproducibility, It is an invention aimed at providing a technique that contributes to stable production of silicon, and is a plate-like shape whose main surface is a cross section perpendicular to the radial direction of a polycrystalline silicon rod grown by precipitation by a chemical growth method.
- thermo diffusivity ⁇ (T) of this plate-like sample is measured, and compared with the thermal diffusivity ⁇ R (T) of the standard sample, the ratio of thermal diffusivity ( ⁇ (T) / ⁇ R ( Based on T)), a method of selecting a polycrystalline silicon rod suitable as a raw material for producing single crystal silicon is disclosed.
- Patent Documents 2 to 4 described above cannot associate the crystal grain size, crystal orientation, and thermal diffusivity with the manufacturing conditions (precipitation conditions) of polycrystalline silicon.
- the characteristics of polycrystalline silicon could not be fed back to the deposition conditions.
- the present invention has been made in view of such problems, and the object of the present invention is to provide polycrystalline silicon for realizing crystal grain size, crystal orientation, and thermal diffusivity suitable for use.
- the object is to provide a technique that enables characteristic control.
- a method for producing a polycrystalline silicon rod according to the present invention is a method for producing a polycrystalline silicon rod by the Siemens method, and the inside of the reactor is brought to a pressure range of 0.45 to 0.9 MPa. In a controlled state, polycrystalline silicon is precipitated, and the average value of the crystal grain size when evaluated by the EBSD method (electron backscattering diffraction measurement method) at an arbitrary portion of the polycrystalline silicon rod is 6 ⁇ m or less. A crystalline silicon rod is obtained.
- the pressure range is controlled to 0.6 to 0.9 MPa.
- the reaction temperature during the polycrystalline silicon precipitation reaction is set in the range of 1100 ° C. to 1150 ° C., for example.
- the polycrystalline silicon rod according to the present invention is a polycrystalline silicon rod grown by the above method, and a plate-like sample collected from an arbitrary part of the polycrystalline silicon rod is subjected to an EBSD method (electron backscatter diffraction measurement method).
- the crystal grain size is in the range of 0.5 to 30 ⁇ m and the average grain size is 6 ⁇ m or less.
- the polycrystalline silicon rod according to the present invention is a polycrystalline silicon rod grown by the above method, and each of n plate-like samples collected from any part of the polycrystalline silicon rod is represented by a Miller index.
- the Bragg reflection from the surface (111) is disposed at a position where it is detected, and the average value of the diffraction intensities obtained by measuring the X-ray diffraction detection amount while rotating the plate-like sample in the measurement surface,
- the population standard deviation of the population of n plate-like samples is ⁇ and the population average is ⁇
- the polycrystalline silicon rod according to the present invention is a polycrystalline silicon rod grown by the above method, and each of n plate-like samples collected from any part of the polycrystalline silicon rod is represented by a Miller index.
- the Bragg reflection from the surface (220) is disposed at a position where it is detected, and the average value of diffraction intensities obtained by measuring the detected amount of X-ray diffraction while rotating the plate-like sample in the measurement surface is obtained,
- the polycrystalline silicon rod according to the present invention is a polycrystalline silicon rod grown by the above method, and each of n plate-like samples collected from an arbitrary part of the polycrystalline silicon rod has a Miller index.
- the area of the diffraction peak appearing in the diffraction chart obtained by measuring the detected amount of X-ray diffraction while rotating the plate-like sample in the measurement plane, arranged at a position where Bragg reflection from the surface (220) is detected
- the ratio of the total diffraction intensity to the area is determined for each of the n plate-like samples, and the average of the n area ratios is 5% or more.
- the polycrystalline silicon rod according to the present invention is a polycrystalline silicon rod grown by the above method, and the thermal diffusivity of a plate-like sample taken from any part of the polycrystalline silicon rod is 73 mm 2 / Less than a second.
- FIG. 1 is a schematic cross-sectional view for explaining a configuration example of a reactor for producing a polycrystalline silicon rod.
- the reaction furnace 100 is an apparatus for obtaining a polycrystalline silicon rod 13 by vapor-phase-growing polycrystalline silicon on the surface of the silicon core wire 12 by the Siemens method, and a bell jar 1 having an inspection window 2 for confirming the internal state.
- the bottom plate 5 are hermetically sealed, and a plurality of silicon core wires 12 assembled in a torii form are arranged in the sealed space to deposit polycrystalline silicon on the surface of the silicon core wire (or silicon rod 13).
- the bottom plate 5 has a core wire holder 11 and a metal electrode 10 for energizing and generating heat from both ends of the silicon core wire 12, and a gas supply nozzle 9 for supplying process gas such as nitrogen gas, hydrogen gas, trichlorosilane gas into the bell jar 1.
- emitting the gas after reaction to the exterior of the bell jar 1 is installed.
- three nozzles 9 are illustrated, but one or more nozzles 9 may be provided.
- the bottom plate 5 has a disk shape, and the metal electrode 10, the nozzle 9, and the reaction exhaust gas port 8 provided on the bottom plate 5 are often installed concentrically.
- the source gas a mixed gas of trichlorosilane and hydrogen is often used, and the reaction temperature is also relatively high at about 1000 ° C. to 1200 ° C. Therefore, a refrigerant inlet 3 and a refrigerant outlet 4 are provided at the lower part and the upper part of the bell jar 1, respectively, and a refrigerant inlet 6 and a refrigerant outlet 7 are provided at both ends of the bottom plate 5, respectively. Coolant is supplied and cooled. Note that water is generally used as such a refrigerant. Further, the inner surface temperature of the bell jar 1 during the precipitation reaction is generally maintained at 150 ° C. to 400 ° C.
- a carbon core wire holder 11 for fixing the silicon core wire 12 is installed on the top of the metal electrode 10.
- the silicon core wire 12 is energized and self-heated to flow the source gas in a state where the surface temperature is controlled to be in the range of about 1000 to 1200 ° C., thereby depositing polycrystalline silicon on the surface of the silicon core wire 12 and Obtain a crystalline silicon rod.
- the reaction temperature for conducting the polycrystalline silicon precipitation reaction is set in the range of, for example, 1100 ° C. to 1150 ° C., and the inside of the reactor is set to 0.45 to 0 Polycrystalline silicon is deposited in a state controlled to a pressure range of .9 MPa.
- the pressure in the furnace when depositing polycrystalline silicon by the Siemens method is closely related to the grain size of the obtained polycrystalline. For this reason, the present inventors believe that, when deposited under a relatively high pressure, the free crystal growth of silicon is inhibited, and as a result, the diameter of each crystal grain becomes small.
- a polycrystalline silicon rod having an average crystal grain size of 6 ⁇ m or less when evaluated by an EBSD method (electron backscattering diffraction measurement method) at an arbitrary site is obtained. obtain.
- the average value of the crystal grain size when evaluated by the EBSD method is 2 ⁇ m or less at an arbitrary site.
- a polycrystalline silicon rod can be obtained.
- Table 1 shows that the reaction temperature during the precipitation reaction of polycrystalline silicon is set to approximately 1100 ° C., and the inside of the reaction furnace is controlled to normal pressure (about 0.1 MPa), 0.45 MPa, and 0.6 MPa.
- normal pressure about 0.1 MPa
- 0.45 MPa 0.45 MPa
- 0.6 MPa the crystal grain sizes evaluated using samples collected from polycrystalline silicon obtained by depositing polycrystalline silicon using trichlorosilane gas as a source gas
- the particle size is determined according to the method described in Patent Document 2 (Japanese Patent Laid-Open No. 2014-031297), and the “particle size” is the value of each of the crystal grains detected by the analysis of the electron backscatter diffraction image.
- the area is determined for each and is defined by the diameter of a circle having the area.
- the average particle size at 0.45 MPa is 6 ⁇ m
- the average particle size at 0.6 MPa is It is 2 ⁇ m.
- the pressure inside the furnace can be controlled by controlling the flow rate at the reaction exhaust gas outlet. Increasing the furnace pressure reduces the gas flow rate in the furnace, but there is no significant change in the deposition rate. This is considered to be because the concentration of hydrochloric acid as a by-product decreases as the furnace pressure increases, and the etching action by hydrochloric acid weakens.
- Table 2 summarizes the crystal orientation evaluated using samples collected from polycrystalline silicon obtained under the above three conditions.
- the CV value of the Miller index plane (111), which was deposited under normal pressure is as high as 17 to 42%, and the orientation of the (111) plane is high.
- the CV value of the Miller index plane (111), which was deposited under the pressures of 0.45 MPa and 0.6 MPa was relatively low, 12 to 14%, and the orientation of the (111) plane was low. I understand.
- the (220) peak area ratio in the table is arranged at a position where Bragg reflection from the mirror index surface (220) is detected for each of n plate-like samples taken from any part of the polycrystalline silicon rod.
- the ratio of the area of the diffraction peak appearing in the diffraction chart obtained by measuring the X-ray diffraction detection amount while rotating the plate sample in the measurement plane to the area of the total diffraction intensity is the n plate samples. It is obtained every time and the average of the n area ratios is obtained.
- the Miller index plane (220) peak area ratio of those deposited under normal pressure is 0%, whereas the Miller index plane (220) peak area ratio of those deposited under pressures of 0.45 MPa and 0.6 MPa is 5%. That's it.
- needle crystal in the table gives a peak appearing on the baseline in the above-mentioned X-ray diffraction measurement chart, and this is a locally oriented needle crystal. It corresponds to the cross section exposed on the surface.
- the crystal grain size is relatively large for those deposited under normal pressure and the orientation of the Miller index plane (111) is high, while the crystal grain size is precipitated for those deposited under high pressure.
- the orientation is relatively small and the orientation of the Miller index surface (111) is not recognized, there is a tendency that needle-like crystals having the Miller index surface (220) as a precipitation surface exist locally.
- the crystal grain size is 0.
- a polycrystalline silicon rod having a range of 5 to 30 ⁇ m and an average particle size of 6 ⁇ m or less can be obtained.
- such a polycrystalline silicon rod is arranged at a position where Bragg reflection from the mirror index surface (220) is detected for each of n plate-like samples collected from an arbitrary part,
- the ratio of the area of the diffraction peak appearing in the diffraction chart obtained by measuring the detected amount of X-ray diffraction while rotating in the measurement plane to the area of the total diffraction intensity for each of the n plate-like samples, It is a polycrystalline silicon rod having an average of n area ratios of 5% or more.
- such a polycrystalline silicon rod is a polycrystalline silicon rod in which the thermal diffusivity of a plate-like sample taken from an arbitrary site is 73 mm 2 / sec or less.
- the polycrystalline silicon rod according to the present invention may be used as it is as a raw material for producing single crystal silicon by the FZ method, or may be crushed into a silicon lump for producing single crystal silicon by the CZ method. It may be used as a raw material.
- the precipitation reaction temperature and the gas concentration of trichlorosilane were kept constant, and only the furnace pressure (normal pressure, 0.45 MPa, 0. 6 MPa, 0.9 MPa) was changed to grow a polycrystalline silicon rod.
- the precipitation reaction temperature was controlled in the range of 1100 to 1150 ° C. by monitoring the surface temperature of the polycrystalline silicon rod with a radiation thermometer. Moreover, the mixed gas of trichlorosilane and hydrogen gas was supplied in the furnace, and the trichlorosilane concentration in this mixed gas was 30 mol%.
- the gas flow rate was 0.05 mol / cm 2 ⁇ h under normal pressure conditions, and the flow rate determined when each reactor internal pressure was set at the reaction exhaust gas outlet. Note that “cm 2 ” in the unit of the gas flow rate is a surface area of the silicon polycrystalline rod in the reaction furnace.
- a polycrystalline silicon rod is grown to a diameter of 140 to 160 mm, and after completion of the reaction, the polycrystalline silicon rod is taken out, and in the radial direction at 10 mm intervals in the growth direction (radial direction) of the polycrystalline silicon rod.
- the reason why the upper limit of the furnace pressure is set to 0.9 MPa is from the viewpoint of the pressure resistance of the bell jar and the excessive decrease in the deposition rate.
- the plate sample was collected according to the method disclosed in Patent Document 3, for example.
- the plate-like sample is a disc having a diameter of about 19 mm and a thickness of about 2 mm. Specifically, it was collected as follows.
- FIG. 2A and FIG. 2B are diagrams for conceptually explaining how to collect the plate-like sample 20 from the polycrystalline silicon rod 13.
- reference numeral 12 denotes a silicon core wire for depositing polycrystalline silicon on the surface to form a silicon rod.
- CTR a part close to the silicon core wire 1
- EDG a part close to the side surface of the polycrystalline silicon rod 10
- the plate-like sample 20 is collected from the middle part of the plate).
- the diameter of the polycrystalline silicon rod 13 illustrated in FIG. 2A is approximately 150 mm. From the side surface side of the polycrystalline silicon rod 13, the rod 14 having a diameter of approximately 19 mm and a length of approximately 75 mm is connected to the longitudinal direction of the silicon core wire 1. And cut out vertically.
- a portion (CTR) of the rod 14 near the silicon core wire 12 a portion near the side surface of the polycrystalline silicon rod 13 (EDG), and a portion between the CTR and EGD (R / 2).
- CTR CTR
- EDG polycrystalline silicon rod 13
- R / 2 a disk-shaped sample (20 CTR , 20 EDG , 20 R / 2 ) having a thickness of approximately 2 mm with a cross section perpendicular to the radial direction of the polycrystalline silicon rod 13 as the main surface is collected.
- the part, length, and number of rods 14 to be sampled may be appropriately determined according to the diameter of the silicon rod 13 and the diameter of the rod 14 to be hollowed out, and from which part of the rod 14 from which the plate-like sample 20 has been hollowed out.
- the position of the silicon rod 13 as a whole can be reasonably estimated. For example, when acquiring two plate-like samples, two positions, a position on the center side and a position on the outside of the point that is half the radius from the center with respect to the radius of the circumference of the silicon rod.
- the acquisition positions of two samples to be compared are located on the center side of a point that is one third of the radius from the center and outside the point that is two thirds of the radius from the center. If the position is used, a more accurate comparison can be made.
- the plate-shaped sample to compare should just be 2 or more, and there is no upper limit in particular.
- the diameter of the plate-like sample 20 is set to approximately 19 mm is merely an example, and the diameter may be appropriately determined within a range that does not hinder measurement.
- the abrasive carbon randoms # 300, # 600, and # 1200 are used in order in order to remove the blade marks of the rotation cut.
- mirror polishing was performed with a polishing pad and a diamond polishing agent of 0.1 ⁇ m.
- the crystal grain size can be measured from 0.5 ⁇ m to several tens of ⁇ m in the measurement of the crystal grain size by EBSD, the distribution state of the crystal grain size can be understood by expressing the measurement result with a histogram.
- Table 3 shows the crystal grain size and crystal orientation at normal pressure (Comparative Examples 1 and 2), 0.45 MPa (Example 1), 0.6 MPa (Example 2), and 0.9 MPa (Example 3). The evaluation results of properties and thermal diffusivity are summarized.
- the crystal grain size tends to decrease, and the width of the crystal grain size distribution tends to narrow.
- the crystal grain size distribution directly affects, for example, thermal diffusivity (thermal conductivity), crystallinity, residual stress, fracture strength, and fragility, so it is indispensable for stable production of single crystal silicon. Information.
- the orientation state (orientation ratio) of the crystal grains having a mirror index face of (111) and the crystal grains having a mirror index face of (220) can be controlled by controlling the furnace pressure. I can read what I can do.
- the thermal diffusivity is a physical quantity that does not depend on the thermal equilibrium relationship, and represents the amount of heat that can be diffused per unit time in terms of area. Thermal diffusivity is important as a parameter associated with dynamic heat input and output in thermal equilibrium during single crystal silicon production.
- the present invention provides a technique capable of controlling the characteristics of polycrystalline silicon in order to realize a crystal grain size, crystal orientation, and thermal diffusivity suitable for use.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Silicon Compounds (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
Description
1 ベルジャ
2 のぞき窓
3 冷媒入口(ベルジャ)
4 冷媒出口(ベルジャ)
5 底板
6 冷媒入口(底板)
7 冷媒出口(底板)
8 反応排ガス出口
9 ガス供給ノズル
10 電極
11 芯線ホルダ
12 シリコン芯線
13 多結晶シリコン棒
14 ロッド
20 板状試料
Claims (13)
- シーメンス法による多結晶シリコン棒の製造方法であって、
反応炉内を0.45~0.9MPaの圧力範囲に制御した状態で、多結晶シリコンを析出させ、
前記多結晶シリコン棒の任意の部位において、EBSD法(電子後方散乱回折測定法)により評価した場合の結晶粒径の平均値が6μm以下である多結晶シリコン棒を得る、ことを特徴とする多結晶シリコン棒の製造方法。 - 前記圧力範囲を0.6~0.9MPaに制御する、請求項1に記載の多結晶シリコン棒の製造方法。
- 多結晶シリコンの析出反応を行う際の反応温度を1100℃~1150℃の範囲に設定する、請求項1または2に記載の多結晶シリコン棒の製造方法。
- 請求項1または2に記載の方法で育成された多結晶シリコン棒であって、
前記多結晶シリコン棒の任意の部位から採取した板状試料をEBSD法(電子後方散乱回折測定法)により評価した場合に、結晶粒径が0.5~30μmの範囲にあり且つ平均粒径が6μm以下である、多結晶シリコン棒。 - 請求項4に記載の多結晶シリコン棒を粉砕して得られた多結晶シリコン塊。
- 請求項1または2に記載の方法で育成された多結晶シリコン棒であって、
前記多結晶シリコン棒の任意の部位から採取したn枚の板状試料のそれぞれを、ミラー指数面(111)からのブラッグ反射が検出される位置に配置し、該板状試料を測定面内で回転させながらX線回折検出量を測定して得られた回折強度の平均値を求め、前記n枚の板状試料の測定結果の母集団の母標準偏差をσとし母平均をμとしたときに、CV=σ/μで定義される変動係数の値が25%以下である、多結晶シリコン棒。 - 請求項6に記載の多結晶シリコン棒を粉砕して得られた多結晶シリコン塊。
- 請求項1または2に記載の方法で育成された多結晶シリコン棒であって、
前記多結晶シリコン棒の任意の部位から採取したn枚の板状試料のそれぞれを、ミラー指数面(220)からのブラッグ反射が検出される位置に配置し、該板状試料を測定面内で回転させながらX線回折検出量を測定して得られた回折強度の平均値を求め、前記n枚の板状試料の測定結果の母集団の母標準偏差をσとし母平均をμとしたときに、CV=σ/μで定義される変動係数の値が30%以下である、多結晶シリコン棒。 - 請求項8に記載の多結晶シリコン棒を粉砕して得られた多結晶シリコン塊。
- 請求項1または2に記載の方法で育成された多結晶シリコン棒であって、
前記多結晶シリコン棒の任意の部位から採取したn枚の板状試料のそれぞれにつき、ミラー指数面(220)からのブラッグ反射が検出される位置に配置し、該板状試料を測定面内で回転させながらX線回折検出量を測定して得られた回折チャート中に現れる回折ピークの面積の全回折強度の面積に対する比を前記n枚の板状試料毎に求め、該n個の面積比の平均が5%以上である、多結晶シリコン棒。 - 請求項10に記載の多結晶シリコン棒を粉砕して得られた多結晶シリコン塊。
- 請求項1または2に記載の方法で育成された多結晶シリコン棒であって、
前記多結晶シリコン棒の任意の部位から採取した板状試料の熱拡散率が、73mm2/秒以下である、多結晶シリコン棒。 - 請求項12に記載の多結晶シリコン棒を粉砕して得られた多結晶シリコン塊。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15833085.2A EP3184489A1 (en) | 2014-08-18 | 2015-07-28 | Method for manufacturing polycrystalline silicon bar and polycrystalline silicon bar |
CN201580043372.5A CN106660809A (zh) | 2014-08-18 | 2015-07-28 | 多晶硅棒的制造方法和多晶硅棒 |
KR1020177003339A KR20170042576A (ko) | 2014-08-18 | 2015-07-28 | 다결정 실리콘 봉의 제조 방법 및 다결정 실리콘 봉 |
US15/327,693 US20170210630A1 (en) | 2014-08-18 | 2015-07-28 | Method for manufacturing polycrystalline silicon bar and polycrystalline silicon bar |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014166103A JP2016041636A (ja) | 2014-08-18 | 2014-08-18 | 多結晶シリコン棒の製造方法および多結晶シリコン棒 |
JP2014-166103 | 2014-08-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016027416A1 true WO2016027416A1 (ja) | 2016-02-25 |
Family
ID=55350388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/003759 WO2016027416A1 (ja) | 2014-08-18 | 2015-07-28 | 多結晶シリコン棒の製造方法および多結晶シリコン棒 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20170210630A1 (ja) |
EP (1) | EP3184489A1 (ja) |
JP (1) | JP2016041636A (ja) |
KR (1) | KR20170042576A (ja) |
CN (1) | CN106660809A (ja) |
WO (1) | WO2016027416A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11454599B2 (en) * | 2018-09-06 | 2022-09-27 | Showa Denko K.K. | Thermal conductivity measuring device, heating device, thermal conductivity measuring method, and quality assurance method |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6314097B2 (ja) | 2015-02-19 | 2018-04-18 | 信越化学工業株式会社 | 多結晶シリコン棒 |
JP6454248B2 (ja) * | 2015-09-14 | 2019-01-16 | 信越化学工業株式会社 | 多結晶シリコン棒 |
JP6969917B2 (ja) * | 2017-07-12 | 2021-11-24 | 信越化学工業株式会社 | 多結晶シリコン棒および多結晶シリコン棒の製造方法 |
JP6951936B2 (ja) * | 2017-10-20 | 2021-10-20 | 信越化学工業株式会社 | 多結晶シリコン棒および単結晶シリコンの製造方法 |
JP7050581B2 (ja) * | 2018-06-04 | 2022-04-08 | 信越化学工業株式会社 | 多結晶シリコンロッドの選別方法 |
JP7345441B2 (ja) * | 2020-07-02 | 2023-09-15 | 信越化学工業株式会社 | 多結晶シリコン製造装置 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011037699A (ja) * | 2009-07-15 | 2011-02-24 | Mitsubishi Materials Corp | 多結晶シリコンの製造方法、製造装置及び多結晶シリコン |
JP2011068553A (ja) * | 2009-08-28 | 2011-04-07 | Mitsubishi Materials Corp | 多結晶シリコンの製造方法、製造装置及び多結晶シリコン |
JP2013063884A (ja) * | 2011-09-20 | 2013-04-11 | Shin-Etsu Chemical Co Ltd | 多結晶シリコン製造装置および多結晶シリコンの製造方法 |
JP2013100211A (ja) * | 2011-11-10 | 2013-05-23 | Shin-Etsu Chemical Co Ltd | 多結晶シリコンの製造方法 |
JP2013112566A (ja) * | 2011-11-29 | 2013-06-10 | Shin-Etsu Chemical Co Ltd | 多結晶シリコンの製造方法および多結晶シリコン製造用反応炉 |
JP2013173644A (ja) * | 2012-02-24 | 2013-09-05 | Shin-Etsu Chemical Co Ltd | 多結晶シリコンおよび多結晶シリコン製造装置 |
WO2014061212A1 (ja) * | 2012-10-16 | 2014-04-24 | 信越化学工業株式会社 | 多結晶シリコン製造用原料ガスの供給方法および多結晶シリコン |
-
2014
- 2014-08-18 JP JP2014166103A patent/JP2016041636A/ja active Pending
-
2015
- 2015-07-28 WO PCT/JP2015/003759 patent/WO2016027416A1/ja active Application Filing
- 2015-07-28 EP EP15833085.2A patent/EP3184489A1/en not_active Withdrawn
- 2015-07-28 US US15/327,693 patent/US20170210630A1/en not_active Abandoned
- 2015-07-28 KR KR1020177003339A patent/KR20170042576A/ko unknown
- 2015-07-28 CN CN201580043372.5A patent/CN106660809A/zh active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011037699A (ja) * | 2009-07-15 | 2011-02-24 | Mitsubishi Materials Corp | 多結晶シリコンの製造方法、製造装置及び多結晶シリコン |
JP2011068553A (ja) * | 2009-08-28 | 2011-04-07 | Mitsubishi Materials Corp | 多結晶シリコンの製造方法、製造装置及び多結晶シリコン |
JP2013063884A (ja) * | 2011-09-20 | 2013-04-11 | Shin-Etsu Chemical Co Ltd | 多結晶シリコン製造装置および多結晶シリコンの製造方法 |
JP2013100211A (ja) * | 2011-11-10 | 2013-05-23 | Shin-Etsu Chemical Co Ltd | 多結晶シリコンの製造方法 |
JP2013112566A (ja) * | 2011-11-29 | 2013-06-10 | Shin-Etsu Chemical Co Ltd | 多結晶シリコンの製造方法および多結晶シリコン製造用反応炉 |
JP2013173644A (ja) * | 2012-02-24 | 2013-09-05 | Shin-Etsu Chemical Co Ltd | 多結晶シリコンおよび多結晶シリコン製造装置 |
WO2014061212A1 (ja) * | 2012-10-16 | 2014-04-24 | 信越化学工業株式会社 | 多結晶シリコン製造用原料ガスの供給方法および多結晶シリコン |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11454599B2 (en) * | 2018-09-06 | 2022-09-27 | Showa Denko K.K. | Thermal conductivity measuring device, heating device, thermal conductivity measuring method, and quality assurance method |
Also Published As
Publication number | Publication date |
---|---|
US20170210630A1 (en) | 2017-07-27 |
CN106660809A (zh) | 2017-05-10 |
JP2016041636A (ja) | 2016-03-31 |
KR20170042576A (ko) | 2017-04-19 |
EP3184489A1 (en) | 2017-06-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2016027416A1 (ja) | 多結晶シリコン棒の製造方法および多結晶シリコン棒 | |
JP5828795B2 (ja) | 多結晶シリコンの結晶配向度評価方法、多結晶シリコン棒の選択方法、および単結晶シリコンの製造方法 | |
EP2863212B1 (en) | Polycrystalline silicon rod selection method | |
CN107848808B (zh) | 多晶硅棒 | |
EP2826748B1 (en) | Polycrystalline silicon rod | |
WO2015194170A1 (ja) | 多結晶シリコン棒の表面温度の算出方法および制御方法、多結晶シリコン棒の製造方法、多結晶シリコン棒、ならびに、多結晶シリコン塊 | |
CN107614761A (zh) | 金刚石单晶、工具以及金刚石单晶的制造方法 | |
EP3260415B1 (en) | Production method for a polycrystalline silicon rod | |
JP2022009646A (ja) | 多結晶シリコン棒および多結晶シリコン棒の製造方法 | |
JP5969956B2 (ja) | 多結晶シリコンの粒径評価方法および多結晶シリコン棒の選択方法 | |
JP2016028990A (ja) | 多結晶シリコン棒の製造方法および多結晶シリコン塊 | |
JP5923463B2 (ja) | 多結晶シリコンの結晶粒径分布の評価方法、多結晶シリコン棒の選択方法、多結晶シリコン棒、多結晶シリコン塊、および、単結晶シリコンの製造方法 | |
CN109694076B (zh) | 多晶硅棒和单晶硅的制造方法 | |
JP6470223B2 (ja) | 単結晶シリコンの製造方法 | |
JP6378147B2 (ja) | 多結晶シリコン棒の製造方法およびcz単結晶シリコンの製造方法 | |
JP2016121052A (ja) | 多結晶シリコン棒、多結晶シリコン棒の加工方法、多結晶シリコン棒の結晶評価方法、および、fz単結晶シリコンの製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15833085 Country of ref document: EP Kind code of ref document: A1 |
|
REEP | Request for entry into the european phase |
Ref document number: 2015833085 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15327693 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 20177003339 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |