WO2012026062A1 - 半導体単結晶の製造装置及び製造方法 - Google Patents
半導体単結晶の製造装置及び製造方法 Download PDFInfo
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- WO2012026062A1 WO2012026062A1 PCT/JP2011/003866 JP2011003866W WO2012026062A1 WO 2012026062 A1 WO2012026062 A1 WO 2012026062A1 JP 2011003866 W JP2011003866 W JP 2011003866W WO 2012026062 A1 WO2012026062 A1 WO 2012026062A1
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- single crystal
- heater
- heat insulating
- semiconductor single
- heat
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
- C30B15/14—Heating of the melt or the crystallised materials
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- 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
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
- C30B15/30—Mechanisms for rotating or moving either the melt or the crystal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T117/00—Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor
- Y10T117/10—Apparatus
- Y10T117/1024—Apparatus for crystallization from liquid or supercritical state
- Y10T117/1032—Seed pulling
- Y10T117/1068—Seed pulling including heating or cooling details [e.g., shield configuration]
Definitions
- the present invention relates to a semiconductor single crystal manufacturing apparatus for growing a compound semiconductor single crystal such as a silicon single crystal or GaAs (gallium arsenide) by the Czochralski method (hereinafter sometimes referred to as CZ method)
- CZ method Czochralski method
- the present invention relates to a method for manufacturing a semiconductor single crystal using an apparatus.
- a crucible for containing a raw material melt is provided inside a growth furnace body (also called a main chamber), and a heater is disposed around the crucible. While melting the raw material in the crucible and keeping the temperature of the melted raw material melt constant, the seed crystal is immersed in the raw material melt and the crucible and the seed crystal are rotated in opposite directions, and the seed crystal is moved upward. The semiconductor single crystal is grown below the seed crystal.
- a graphite material or the like is provided in the vicinity of the furnace wall inside the growth furnace body.
- a heat insulating material made of is used. This heat insulating material protects the furnace wall and at the same time keeps the inside of the growth furnace main body, thereby suppressing the heat generated by an extra heater and keeping the raw material melt temperature constant without waste.
- Patent Document 1 discloses a single crystal pulling method in which the concentration of oxygen taken into a single crystal is controlled by changing the number of stacked heat insulating plates arranged below the crucible.
- Patent Document 2 discloses a crystal pulling apparatus in which a heat conduction radiation member that receives radiant heat from a heater and transmits heat to the lower part of the crucible by heat conduction and emits radiant heat toward the crucible is disclosed. Yes.
- Patent Document 3 discloses a semiconductor single crystal manufacturing apparatus in which a heat insulating plate that can be driven up and down by a heat insulating plate lifting mechanism is disposed below the crucible.
- the present invention has been made in view of such a problem, and enhances the heat retaining effect around the crucible containing the raw material melt, and reduces the heat generation amount (that is, power consumption) of the heater disposed outside the crucible.
- An object of the present invention is to provide a semiconductor single crystal manufacturing apparatus capable of sufficiently increasing the growth rate of the semiconductor single crystal and stabilizing the quality of the semiconductor single crystal even if it is suppressed.
- the present invention has been made to solve the above-described problems, and includes at least a crucible and a heater arranged around the crucible inside the growth furnace main body, and the heater is arranged in the crucible.
- An apparatus for producing a semiconductor single crystal which heats the raw material melt contained in the raw material melt and raises the semiconductor single crystal from the raw material melt by the Czochralski method, and surrounds the heater in the growth furnace body
- a heat insulating cylinder is disposed on the inner surface, the heat insulating cylinder has a step portion dividing the upper part and the lower part on the inner surface, and the inner diameter of the lower part is larger than the inner diameter of the upper part.
- a heat insulating plate is arranged below the heater and inside the lower part of the heat retaining cylinder, and the outer diameter of the heat insulating plate is larger than the inner diameter of the upper part of the heat insulating cylinder and smaller than the inner diameter of the lower part of the heat insulating cylinder.
- the above-mentioned when pulling up and manufacturing the semiconductor single crystal by the CZ method, the above-mentioned is provided below the heater disposed around the crucible in the growth furnace body. Since the heat insulating plate having the prescribed shape is arranged, the heat retaining effect around the crucible is enhanced, and a sufficient amount of heat can be concentrated in the raw material melt even if the output of the heater is suppressed to some extent. This suppresses excessive radiant heat from the heater, increases the cooling efficiency of the semiconductor single crystal to be grown, reduces power consumption by the heater, and at the same time further increases the pulling speed and stabilizes the quality of the semiconductor single crystal. Can be achieved.
- the thickness of the lower part of the heat insulating cylinder is 30 to 70% of the thickness of the upper part. If the wall thickness at the bottom of the heat insulation cylinder is set to 30 to 70% of the wall thickness at the top of the heat insulation cylinder in this way, radiation from the bottom of the heater is more effectively blocked, and the outflow of heat energy to the bottom of the growth furnace main body is prevented. Can be prevented.
- the said heat insulation board is driven up by the heat insulation board raising / lowering mechanism with the said crucible. If the heat insulating plate is driven to be lifted by the heat insulating plate raising / lowering mechanism together with the crucible as described above, a state in which the temperature around the crucible is efficiently maintained regardless of the position of the crucible can always be maintained. As a result, the temperature distribution around the crucible can be appropriately maintained throughout the entire single crystal growth process.
- the heater can be driven up and down by a heater lifting mechanism, and the heater lifting mechanism can also be used as the heat insulating plate lifting mechanism.
- the heater and the heat insulating plate may be integrated via a common base, and the heat insulating plate lifting mechanism that also serves as the heater lifting mechanism may drive the common base up and down. . Thereby, a simpler configuration can be realized.
- the present invention provides the raw material melt while heating the raw material melt stored in the crucible by the heater in the growth furnace body using any one of the semiconductor single crystal manufacturing apparatuses described above.
- a method for producing a semiconductor single crystal comprising producing a semiconductor single crystal by pulling up and growing the semiconductor single crystal by the Czochralski method.
- the heat insulation effect around the crucible is increased in the manufacture of the semiconductor single crystal, and it is sufficient even if the output of the heater is suppressed to some extent.
- a large amount of heat can be concentrated in the raw material melt. This suppresses excessive radiant heat from the heater, increases the cooling efficiency of the semiconductor single crystal to be grown, reduces the power consumption of the heater, and further increases the pulling speed and stabilizes the quality of the semiconductor single crystal. Can be achieved.
- the heat retaining effect around the crucible when the semiconductor single crystal is pulled and grown and manufactured by the CZ method is increased, and even if the output of the heater is suppressed to a certain extent, the amount of heat is sufficient.
- the output of the heater can be suppressed to some extent, deterioration of the heater and the crucible can be suppressed, and the life of each member can be improved.
- FIG. 6 is a cross-sectional view schematically showing a semiconductor single crystal manufacturing apparatus used in Comparative Example 1.
- FIG. 6 is a cross-sectional view schematically showing a semiconductor single crystal manufacturing apparatus used in Comparative Example 2.
- FIG. It is a graph which shows the measurement result of an Example and a comparative example.
- the present invention will be described in detail with reference to the drawings, but the present invention is not limited thereto.
- the present invention can be applied to pulling various semiconductor single crystals.
- a case where a silicon single crystal is mainly manufactured will be described as an example.
- FIG. 1 is a schematic cross-sectional view showing an embodiment of a semiconductor single crystal manufacturing apparatus according to the present invention for growing a semiconductor single crystal by a CZ method.
- the semiconductor single crystal manufacturing apparatus shown in FIG. 1 includes a growth furnace main body (also referred to as a main chamber) 19a that contains a raw material melt 13 that is a raw material of a semiconductor single crystal, and a raw material melt connected to the growth furnace main body 19a.
- 13 is composed of an upper growth furnace (also called a pull chamber) 19b for holding and taking out the semiconductor single crystal pulled up from 13.
- a crucible (inner crucible) 11a containing the raw material melt 13 is disposed near the inner center of the growth furnace body 19a, and the heater 12 provided around the crucible (outer crucible) 11b generates heat.
- the raw material is melted and held as a high-temperature melt.
- the crucible directly holding the raw material melt 13 is a quartz crucible 11a, and this quartz crucible 11a is softened at a high temperature and is brittle and easily broken.
- the outside of the crucible 11a is covered with a graphite crucible 11b.
- the crystal is grown while rotating the quartz crucible 11a and the semiconductor single crystal 17 in directions opposite to each other. Therefore, the crucible support shaft 16 is provided below the graphite crucible 11b. It can be moved up and down and freely rotated by a crucible rotating lifting mechanism 20 attached to the outer lower part of the growth furnace main body 19a. Further, at the time of growing a single crystal, it is preferable to operate with the melt surface of the raw material melt 13 kept constant in order to obtain a desired crystal quality. It is a mechanism capable of holding the melt surface of the raw material melt 13 at a desired position.
- a pulling shaft winding mechanism (not shown) for unwinding and winding a pulling shaft 15 such as a wire for pulling up the single crystal 17 is provided at the ceiling of the upper growing furnace 19b.
- a seed crystal holder 15 a for holding the seed crystal 14 is provided at the tip of the pulling shaft 15 unwound from the top.
- the upper growth furnace 19b has an inert gas amount introduced into the furnace by a gas supply pipe (not shown) for introducing an inert gas into the furnace or a gas flow rate control device attached to the gas supply pipe.
- the inert gas introduced into the furnace is exhausted from a gas exhaust pipe (not shown) provided at the bottom of the growth furnace main body 19a.
- a heat insulating cylinder 21 is provided between the heater 12 and the furnace wall of the growth furnace main body 19a in order to protect the furnace wall from high-temperature radiant heat from the heater 12 and to efficiently keep the inside of the growth furnace main body 19a.
- the bottom of the growth furnace body 19a is also nurtured when the raw material melt 13 flows out of the crucible 11a in order to protect the furnace wall from high-temperature radiant heat and to keep the inside of the growth furnace body 19a warm.
- a bottom heat insulating material 23 is provided for the purpose of holding the raw material melt 13 so as not to flow out of the furnace body 19a.
- a heat insulating plate 22 is provided between the bottom heat insulating material 23 and the heater 12.
- the heat insulating plate 22 can be moved up and down by a heat insulating plate lifting mechanism 41. Further, at the time of single crystal growth, in order to obtain a desired crystal quality, the heat insulating plate elevating mechanism 41 can hold the heat insulating plate 22 in a desired position via the heat insulating plate elevating base 42.
- the inner surface of the heat insulating cylinder 21 has a step portion 21a that separates the upper portion and the lower portion, and the inner diameter of the lower portion 21b is larger than the inner diameter of the upper portion 21c.
- the heat insulation cylinder 21 sets the thickness of the main-body part to 80 mm or more.
- the step 21 a is formed in the heat insulating cylinder 21 so that the thickness of the lower part 21 b of the heat insulating cylinder 21 is 30 to 70% of the thickness of the upper part 21 c of the heat insulating cylinder 21.
- the position where the step 21a is formed is set to a height that is equal to or higher than the uppermost position of the heat insulating plate 22 from the time of raw material melting to the time of crystal growth.
- the heat insulating cylinder 21 has a main body made of carbon fiber.
- the outer diameter of the heat insulating plate 22 is larger than the inner diameter of the upper part 21 c of the heat insulating cylinder 21 and smaller than the inner diameter of the lower part 21 b of the heat insulating cylinder 21.
- the thickness of the heat insulating plate is preferably 50 mm or more.
- the heat insulating plate 22 preferably has a carbon fiber main body.
- the heat insulating plate 22 is fitted to the stepped portion 21 a of the heat insulating tube 21, that is, the heat insulating plate 22 is placed below the heater 12 and the heat insulating tube.
- the radiant heat from the lower part of the heater 12 during crystal growth is prevented from reaching the bottom heat insulating material 23 directly, and the heater power Can be efficiently transmitted to the raw material melt 13.
- the heat insulating plate 22 becomes larger than the diameter of the heater 12, and the radiant heat from the lower portion of the heater 12 is directly applied to the lower portion of the chamber. Without reaching, it can be directly received by the heat insulating cylinder 21 and the heat insulating plate 22 and efficiently reflected downward in the crucible.
- the heater 12 when the semiconductor single crystal is pulled up, the heater 12 can be driven to rise through the heater lifting base 32 by the heater lifting mechanism 31 together with the crucibles 11a and 11b and the heat insulating plate 22. preferable.
- the heater 12 As the raw material melt 13 decreases due to crystal growth, the crucibles 11a and 11b rise, and the heat capacity of the entire crucible containing the raw material melt 13 also changes, but the heater 12 is raised following the crucibles 11a and 11b. Since the heating center of the heater 12 can be moved in accordance with the movement of the crucibles 11a and 11b and the decrease in the raw material melt 13, the raw material melt 13 can be heated more appropriately.
- FIG. 2 is a schematic cross-sectional view showing an embodiment in which the heater 12 and the heat insulating plate 22 are integrated through a common base as another example of the embodiment of the semiconductor single crystal manufacturing apparatus according to the present invention.
- the heat insulating plate 22 and the heater 12 are driven via a common base (common lift base) 52 by an integrated lift mechanism 51.
- the heat insulating plate 22 is supported by a heat insulating plate supporting insulator 53 made of an insulating material such as aluminum oxide or quartz glass, thereby preventing a supply current to the heater 12 from flowing to the heat insulating plate 22 side.
- Other configurations are the same as those of the embodiment of the semiconductor single crystal manufacturing apparatus shown in FIG.
- a semiconductor single crystal is stored based on a storage device (not shown) that stores various pulling patterns of the semiconductor single crystal 17 and pulling pattern data stored in the storage device.
- the crucible ascending / descending mechanism 20 for controlling the operation of the crucible rotation elevating mechanism 20 and the heat insulating plate 22 are raised following the rise of the crucibles 11a and 11b so that the crucible rises following the pulling up of the crucible 17.
- a heat insulating plate raising control unit (not shown) that controls the operation of the heat insulating plate lifting mechanism 41 can be provided.
- a heater raising control unit (not shown) that controls the operation of the heater lifting mechanism 31 so as to move in combination with the heater 12 can be provided.
- Example 1 Example 2
- Example 2 Single Crystal Growth Conditions A silicon single crystal was grown under the following conditions using the semiconductor single crystal manufacturing apparatus of the present invention shown in FIG. a) Raw material: 200 kg of polycrystalline silicon was filled in a quartz crucible 11a having a diameter of 650 mm. b) Growth crystal: 200 mm in diameter. A seed crystal 14 having a crystal axis direction ⁇ 100> was used. c) A heat insulating plate 22 having a thickness of 80 mm was used. The outer diameter of the heat insulating plate 22 was set to the conditions of Example 1 and Example 2 described in Table 1. d) Heater 12: A slit overlapping section having a length (heat generating portion) of 200 mm was used.
- the top wall thickness of the heat insulating cylinder 21 was 90 mm.
- the inner diameter of the upper part of the heat insulation cylinder and the inner diameter of the lower part of the heat insulation cylinder were the conditions of Example 1 and Example 2 described in Table 1, respectively.
- the power consumed when growing the constant diameter portion of the silicon single crystal is the case where a conventional heat insulating plate is used.
- both Example 1 and Example 2 were able to grow single crystals with less power consumption by about 10%. Further, almost no deformation of the crucible caused by the high temperature heating of the quartz crucible 11a for a long time was observed, and it was confirmed that the load due to the heating to the crucible was reduced.
- Comparative Example 1 Using the semiconductor single crystal manufacturing apparatus shown in FIG. 3, a silicon single crystal having a diameter of 200 mm was pulled under substantially the same conditions as in Examples 1 and 2 except for the conditions listed in Table 1.
- the semiconductor single crystal manufacturing apparatus shown in FIG. 3 is obtained by replacing the manufacturing apparatus shown in FIG. 2 with a heat insulating plate and a heat insulating cylinder that are not fitted to each other (the heat insulating plate 72 and the heat insulating cylinder 71). There is no step in the heat insulating cylinder 71, and the inner diameter and the outer diameter of the heat insulating plate 72 are the conditions of Comparative Example 1 described in Table 1 above.
- the power consumption during the formation of the crystal constant diameter portion was about 10% higher than in Example 1.
- the radiant heat from the heater 12 increased, and a distortion that was considered to be deformed by heating was recognized in a part of the upper part of the crucible 11a. .
- the amount of heat generated by the heater 12 increases due to an increase in the amount of heat energy flowing from the gap between the heat insulating plate 72 and the heat insulating cylinder 71 to the chamber bottom (bottom heat insulating material 23), and the heat flux directly above the raw material melt 13. This is probably because the atmospheric temperature is high.
- Example 2 Using the semiconductor single crystal manufacturing apparatus shown in FIG. 4, a silicon single crystal having a diameter of 200 mm was pulled up under substantially the same conditions as in Examples 1 and 2 except for the conditions listed in Table 1.
- the semiconductor single crystal manufacturing apparatus shown in FIG. 4 is different from the manufacturing apparatus shown in FIG. 2 in that the heat insulating cylinder 81 has a step, but the outer shape of the heat insulating plate 82 is smaller than the inner diameter of the upper part of the heat insulating cylinder 81.
- the heat insulating plate 82 is replaced with one that cannot be overlapped.
- the inner diameter of the heat insulating cylinder 81 and the outer diameter of the heat insulating plate 82 were the conditions of Comparative Example 2 described in Table 1 above.
- the thickness of the upper part of the heat insulation cylinder is 80 mm or more and the thickness of the lower part of the heat insulation cylinder is 30 to 70% of the thickness of the upper part of the heat insulation cylinder.
- the present invention is not limited to the above embodiment.
- the above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.
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Abstract
Description
例えば、特許文献1には、ルツボの下方に配置する断熱板の積層枚数を変化させることにより単結晶中に取り込まれる酸素濃度を制御する単結晶引き上げ方法が開示されている。
このように保温筒下部の肉厚を保温筒上部の肉厚の30~70%とすれば、より効果的に、加熱ヒータ底部からの輻射を遮り、育成炉本体底部への熱エネルギーの流出を防ぐことができる。
このように断熱板をルツボとともに断熱板昇降機構により上昇駆動されるものとすれば、ルツボの位置によらずルツボ周囲を効率良く保温する状態を常に維持することができる。その結果、単結晶育成工程の全体にわたって、ルツボ周囲の温度分布を適切に維持することが可能となる。
さらにこの場合、前記加熱ヒータと前記断熱板とが共通ベースを介して一体化され、前記ヒータ昇降機構を兼ねる前記断熱板昇降機構は前記共通ベースを昇降駆動するものであるものとすることもできる。これにより、一層簡略な構成を実現できる。
なお、保温筒21は炭素繊維製の本体部を有することが望ましい。
この実施形態では、断熱板22と加熱ヒータ12とを、一体化した昇降機構51により共通ベース(共通の昇降ベース)52を介して駆動するようにしている。断熱板22は酸化アルミニウムや石英ガラス等の絶縁体からなる断熱板支持絶縁体53により支持されており、これにより、加熱ヒータ12への供給電流が断熱板22側へ流れないようにされている。その他の構成は図1に示した半導体単結晶の製造装置の実施形態と同様である。
本発明の効果を確認するために以下の実験を行った。
(1)単結晶の育成条件
図2に示す本発明の半導体単結晶の製造装置を用いて、以下の条件にてシリコン単結晶の育成を行った。
a)原料:多結晶シリコン200kgを口径650mmの石英製ルツボ11aに充填した。
b)育成結晶:直径200mmとした。種結晶14は、結晶軸方向の方位が<100>のものを使用した。
c)断熱板22の厚みが80mmのものを使用した。断熱板22の外径は表1に記載の実施例1及び実施例2の条件とした。
d)加熱ヒータ12:スリット重なり区間の長さ(発熱部)が200mmのものを使用した。
e)保温筒21の上部肉厚は90mmのものを使用した。保温筒上部の内径と保温筒下部の内径は、それぞれ、表1に記載の実施例1及び実施例2の条件とした。
f)中心の磁束密度4000Gの水平磁場を印加して単結晶を育成した。
これらの条件により断熱板22及び加熱ヒータ12を、ルツボ11a、11bの移動に合わせ移動させながら、繰り返し単結晶製造を行った。
図3に示した半導体単結晶の製造装置を用いて、表1中に併記した条件以外は実施例1、2と略同じ条件で、直径200mmのシリコン単結晶を引き上げた。図3に示した半導体単結晶の製造装置は、図2に示す製造装置から、断熱板と保温筒を嵌め合い配置とならないもの(断熱板72及び保温筒71)に交換したものである。保温筒71に段差はなく、その内径及び断熱板72の外径は、上記表1中に記載の比較例1の条件とした。
図4に示した半導体単結晶の製造装置を用いて、表1中に併記した条件以外は実施例1、2と略同じ条件で、直径200mmのシリコン単結晶を引き上げた。図4に示した半導体単結晶の製造装置は、図2に示す製造装置から、保温筒81に段差を有するが、断熱板82の外形が保温筒81の上部の内径より小さく、保温筒81と断熱板82で重なりができないものに交換したものである。保温筒81の内径及び断熱板82の外径は、上記表1中に記載の比較例2の条件とした。
Claims (6)
- 育成炉本体の内部に、少なくとも、ルツボと、該ルツボの周囲に配置された加熱ヒータとを具備し、前記加熱ヒータにより前記ルツボ内に収容した原料融液を加熱しつつ、該原料融液からチョクラルスキー法により半導体単結晶を引き上げて育成する半導体単結晶の製造装置であって、
前記育成炉本体内の前記加熱ヒータの周囲に保温筒が配置されており、該保温筒は内側面に上部と下部とを分ける段差部を有し、前記下部の内径が前記上部の内径よりも大きいものであり、
前記育成炉本体内において前記加熱ヒータの下方かつ前記保温筒の下部の内側に断熱板が配置されており、該断熱板の外径が、前記保温筒の上部の内径よりも大きく、かつ前記保温筒の下部の内径よりも小さいものであることを特徴とする半導体単結晶の製造装置。 - 前記保温筒は、前記下部の肉厚が前記上部の肉厚の30~70%であることを特徴とする請求項1に記載の半導体単結晶の製造装置。
- 前記断熱板は、前記ルツボとともに断熱板昇降機構により上昇駆動されるものであることを特徴とする請求項1または請求項2に記載に記載の半導体単結晶の製造装置。
- 前記加熱ヒータはヒータ昇降機構により昇降駆動が可能であり、前記ヒータ昇降機構が前記断熱板昇降機構に兼用されていることを特徴とする請求項3に記載の半導体単結晶の製造装置。
- 前記加熱ヒータと前記断熱板とが共通ベースを介して一体化され、前記ヒータ昇降機構を兼ねる前記断熱板昇降機構は前記共通ベースを昇降駆動するものであることを特徴とする請求項4に記載の半導体単結晶の製造装置。
- 請求項1ないし5のいずれか1項に記載の半導体単結晶の製造装置を用いて、前記育成炉本体内において、前記加熱ヒータにより前記ルツボ内に収容した原料融液を加熱しつつ、該原料融液からチョクラルスキー法により半導体単結晶を引き上げて育成することにより半導体単結晶を製造することを特徴とする半導体単結晶の製造方法。
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WO2014169452A1 (zh) | 2013-04-17 | 2014-10-23 | Sun Yingui | 锁止装置、运载工具安全带调节装置以及运载工具安全带 |
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JP5891959B2 (ja) | 2012-06-04 | 2016-03-23 | 信越半導体株式会社 | 単結晶製造装置 |
JP5945971B2 (ja) | 2013-10-29 | 2016-07-05 | 信越半導体株式会社 | シリコン単結晶引上装置 |
CN114574943B (zh) * | 2022-03-03 | 2023-09-08 | 高景太阳能股份有限公司 | 一种单晶炉及一种单晶 |
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JPH0446099A (ja) * | 1990-06-12 | 1992-02-17 | Nippon Steel Corp | シリコン単結晶体の引上装置 |
US6183553B1 (en) * | 1998-06-15 | 2001-02-06 | Memc Electronic Materials, Inc. | Process and apparatus for preparation of silicon crystals with reduced metal content |
JP2000053486A (ja) * | 1998-07-31 | 2000-02-22 | Shin Etsu Handotai Co Ltd | 結晶引き上げ装置および結晶引き上げ方法 |
JP2002068886A (ja) * | 2000-08-31 | 2002-03-08 | Shin Etsu Handotai Co Ltd | 半導体単結晶製造装置及び黒鉛部材評価方法 |
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US20130125810A1 (en) | 2013-05-23 |
JP2012046371A (ja) | 2012-03-08 |
DE112011102485B8 (de) | 2021-09-23 |
DE112011102485B4 (de) | 2021-07-08 |
KR101675903B1 (ko) | 2016-11-14 |
US9234296B2 (en) | 2016-01-12 |
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