JP2013137131A - In-field heat treatment device - Google Patents

In-field heat treatment device Download PDF

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JP2013137131A
JP2013137131A JP2011287424A JP2011287424A JP2013137131A JP 2013137131 A JP2013137131 A JP 2013137131A JP 2011287424 A JP2011287424 A JP 2011287424A JP 2011287424 A JP2011287424 A JP 2011287424A JP 2013137131 A JP2013137131 A JP 2013137131A
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magnetic field
heat treatment
protrusion
superconducting coil
treatment apparatus
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Japanese (ja)
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Ryoichi Hirose
量一 広瀬
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Japan Superconductor Technology Inc
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Japan Superconductor Technology Inc
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Priority to JP2011287424A priority Critical patent/JP2013137131A/en
Priority to PCT/JP2012/082810 priority patent/WO2013099702A1/en
Publication of JP2013137131A publication Critical patent/JP2013137131A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/04—Cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/67005—Apparatus not specifically provided for elsewhere
    • H01L21/67011—Apparatus for manufacture or treatment
    • H01L21/67098—Apparatus for thermal treatment
    • H01L21/67109—Apparatus for thermal treatment mainly by convection

Abstract

PROBLEM TO BE SOLVED: To compactly design a height dimension of an in-field heat treatment device using a non-coolant-type superconductive magnet.SOLUTION: A height dimension of an in-field heat treatment device using a non-coolant-type superconductive magnet is compactly designed by: forming a protrusion 3b on a side section of a cylindrical, vertically-facing vacuum heat insulation container 3; causing a heat-conducting member 5 in a transcalent conductor connected to a superconductive coil 2 to extend inside a protrusion 1b in a radiation shield 1 inside the protrusion 3b; arranging, facing vertically downwards, a two-stage refrigeration machine 4 at the site of the protrusion 1b in the radiation shield 1; and by connecting the two-stage refrigeration end 4b thereof to the heat-conducting member 5 that has been extended inside the protrusion 1b.

Description

本発明は、被処理部材に磁場を印加しながら熱処理する磁場中熱処理装置に関する。   The present invention relates to a heat treatment apparatus in a magnetic field that performs heat treatment while applying a magnetic field to a member to be treated.

ＭＲＡＭ(Magnetic Random Access Memory)や磁気抵抗効果型ヘッド等に用いられる半導体素子を製造する際には、被処理部材に平行磁場を印加しながら熱処理を行う磁場中熱処理装置が用いられている。この磁場中熱処理装置には、被処理部材を収納する筒状の炉容器の周囲に超電導磁石を配置して、炉容器内に平行磁場を形成するとともに、炉容器内の被処理部材を加熱するヒータ等の加熱手段を設けたものが用いられている（例えば、特許文献１参照）。超電導磁石で磁場を形成する磁場中熱処理装置は、通常の電磁石を使用するものに較べて消費電力が少なく、かつ、磁界強度の強い磁場を形成できる利点がある。   When manufacturing a semiconductor element used for an MRAM (Magnetic Random Access Memory), a magnetoresistive head, or the like, a heat treatment apparatus in a magnetic field that performs heat treatment while applying a parallel magnetic field to a member to be processed is used. In this heat treatment apparatus in a magnetic field, a superconducting magnet is disposed around a cylindrical furnace vessel that accommodates a member to be treated, thereby forming a parallel magnetic field in the furnace vessel and heating the member to be treated in the furnace vessel. What provided heating means, such as a heater, is used (for example, refer to patent documents 1). A heat treatment apparatus in a magnetic field that forms a magnetic field with a superconducting magnet has an advantage that it can form a magnetic field with low power consumption and a strong magnetic field strength as compared with an apparatus using an ordinary electromagnet.

上述した半導体素子の製造に用いられる磁場中熱処理装置は、クリーンルーム内に設置されることが多い。超電導磁石には、真空断熱容器内で、超電導コイルを液体ヘリウム等の液体冷媒に浸漬して冷却する冷媒型のものと、超電導コイルを冷凍機の冷却端で冷却する無冷媒型のものとがあり、無冷媒型のものは、ヘリウムガス等の冷媒ガスを放出する恐れがないので、クリーンルーム内に設置する磁場中熱処理装置には好適である。   The above-described heat treatment apparatus in a magnetic field used for manufacturing the semiconductor element is often installed in a clean room. There are two types of superconducting magnets: a refrigerant type that cools the superconducting coil by immersing it in a liquid refrigerant such as liquid helium, and a non-refrigerant type that cools the superconducting coil at the cooling end of the refrigerator. The non-refrigerant type is suitable for a heat treatment apparatus in a magnetic field installed in a clean room because there is no risk of releasing a refrigerant gas such as helium gas.

特許文献１に記載された磁場中熱処理装置は、筒状の炉容器が鉛直向きに配置される貫通孔を設けた筒状の真空断熱容器に、炉容器内に平行磁場を形成する無冷媒型の超電導磁石を配置し、筒状鉛直向きの真空断熱容器の下面側に冷凍機を鉛直上向きに配置して、その冷却端を真空断熱容器内の超電導コイルに接続している。   The heat treatment apparatus in a magnetic field described in Patent Document 1 is a refrigerant-free type that forms a parallel magnetic field in a furnace container in a cylindrical vacuum heat insulating container provided with a through hole in which a cylindrical furnace container is arranged vertically. The superconducting magnet is disposed, the refrigerator is disposed vertically upward on the lower surface side of the cylindrical vertical vacuum heat insulating container, and the cooling end is connected to the superconducting coil in the vacuum heat insulating container.

特開２００１−１０２２１１号公報JP 2001-102111 A

特許文献１に記載された無冷媒型の超電導磁石を用いた磁場中熱処理装置は、筒状鉛直向きの真空断熱容器の下面側に冷凍機を鉛直上向きに配置して、真空断熱容器内の超電導コイルに接続しているので、炉容器への被処理部材の装填機構を含めた全体の高さ寸法が大きくなり、クリーンルーム内に設置する際の高さ寸法制約が厳しくなる問題がある。   A magnetic field heat treatment apparatus using a refrigerant-free superconducting magnet described in Patent Document 1 has a refrigerator placed vertically upward on the lower surface side of a cylindrical vertical vacuum insulation container, and the superconductivity in the vacuum insulation container Since it is connected to the coil, there is a problem that the entire height dimension including the mechanism for loading the member to be processed into the furnace vessel becomes large, and the height dimension restriction when installing in the clean room becomes severe.

そこで、本発明の課題は、無冷媒型の超電導磁石を用いた磁場中熱処理装置の高さ寸法をコンパクトに設計できるようにすることである。   Therefore, an object of the present invention is to make it possible to design a height dimension of a heat treatment apparatus in a magnetic field using a refrigerant-free superconducting magnet in a compact manner.

上記の課題を解決するために、本発明は、被処理部材を収納した筒状の炉容器が鉛直向きに挿入される貫通孔を設けた筒状鉛直向きの真空断熱容器に、前記貫通孔に配置される炉容器内に平行磁場を形成する超電導コイルを配置して、前記炉容器内の被処理部材を加熱する加熱手段を設け、前記超電導コイルを冷凍機の冷却端で冷却する磁場中熱処理装置において、前記筒状鉛直向きの真空断熱容器の側部に突出部を形成し、この突出部内に前記超電導コイルに接続した熱良導体の熱伝導部材を延出させ、前記真空断熱容器の突出部の部位に前記冷凍機を配置して、その冷却端を前記突出部内に延出させた前記熱伝導部材に接続した構成を採用した。   In order to solve the above-described problems, the present invention provides a cylindrical vertical vacuum insulation container provided with a through-hole into which a cylindrical furnace container containing a member to be processed is inserted in the vertical direction. A superconducting coil for forming a parallel magnetic field is arranged in the arranged furnace vessel, a heating means for heating a member to be treated in the furnace vessel is provided, and a heat treatment in a magnetic field for cooling the superconducting coil at a cooling end of a refrigerator In the apparatus, a protruding portion is formed at a side portion of the cylindrical vertically insulated vacuum insulating container, and a heat conductive member of a good thermal conductor connected to the superconducting coil is extended into the protruding portion, and the protruding portion of the vacuum insulating container The structure which connected the said refrigerator to the heat conductive member which has arrange | positioned the said refrigerator in this site | part and extended the cooling end in the said protrusion part was employ | adopted.

すなわち、筒状鉛直向きの真空断熱容器の側部に突出部を形成し、この突出部内に超電導コイルに接続した熱良導体の熱伝導部材を延出させ、真空断熱容器の突出部の部位に冷凍機を配置して、その冷却端を突出部内に延出させた熱伝導部材に接続することにより、無冷媒型の超電導磁石を用いた磁場中熱処理装置の高さ寸法をコンパクトに設計できるようにした。   That is, a protruding portion is formed on the side of the cylindrical vertical vacuum heat insulating container, and a heat conductive member of a good thermal conductor connected to the superconducting coil is extended into the protruding portion, and the protruding portion of the vacuum insulating container is frozen. By arranging the machine and connecting its cooling end to the heat conduction member extended into the protruding part, the height dimension of the magnetic field heat treatment apparatus using a refrigerant-free superconducting magnet can be designed compactly did.

前記超電導コイルが、鉛直向きの同軸上に配置された複数の円筒形コイルの組み合わせからなり、前記炉容器内に鉛直向きの平行磁場を形成するものであり、前記複数のコイルの少なくとも一対のコイルを、前記超電導コイル内側の磁場中心を含む磁場軸に垂直な面に対して対称に配置することにより、炉容器内に平行磁場をより良好に形成することができる。   The superconducting coil is a combination of a plurality of cylindrical coils arranged coaxially in the vertical direction, and forms a vertical parallel magnetic field in the furnace vessel. At least a pair of coils of the plurality of coils Is arranged symmetrically with respect to a plane perpendicular to the magnetic field axis including the magnetic field center inside the superconducting coil, a parallel magnetic field can be more favorably formed in the furnace vessel.

前記超電導コイルが、鉛直向きの同軸上に配置された複数の円筒形コイルの組み合わせからなり、前記炉容器内に鉛直向きの平行磁場を形成するものであり、前記複数のコイルの少なくとも１つを、前記超電導コイル内側における磁場と逆向きの磁場を発生させるように、順向きの磁場を発生させる他のコイルの外周側に配置することにより、逆向きの磁場を発生させる外周側のコイルによって、超電導コイルの外周側での漏洩磁場を小さくすることができる。   The superconducting coil is a combination of a plurality of cylindrical coils arranged coaxially in the vertical direction, and forms a vertical parallel magnetic field in the furnace vessel. At least one of the plurality of coils is The outer coil that generates the magnetic field in the opposite direction is disposed by the outer coil side of the other coil that generates the forward magnetic field so as to generate the magnetic field in the opposite direction to the magnetic field inside the superconducting coil. The leakage magnetic field on the outer peripheral side of the superconducting coil can be reduced.

前記冷凍機は２段式のパルスチューブ冷凍機とするのが好ましい。パルスチューブ冷凍機は、蓄冷材を往復運動させることなく固定するので、メンテナンスを楽にすることができる。   The refrigerator is preferably a two-stage pulse tube refrigerator. Since the pulse tube refrigerator fixes the regenerator material without reciprocating, maintenance can be facilitated.

本発明に係る磁場中熱処理装置は、筒状鉛直向きの真空断熱容器の側部に突出部を形成し、この突出部内に超電導コイルに接続した熱良導体の熱伝導部材を延出させ、真空断熱容器の突出部の部位に冷凍機を鉛直向きに配置して、その冷却端を突出部内に延出させた熱伝導部材に接続するようにしたので、無冷媒型の超電導磁石を用いた磁場中熱処理装置の高さ寸法をコンパクトに設計することができる。   The heat treatment apparatus in a magnetic field according to the present invention forms a protrusion on the side of a cylindrical vertical vacuum heat insulating container, and extends a heat conductive member of a good thermal conductor connected to the superconducting coil in the protrusion to Since the refrigerator is arranged vertically at the projecting part of the container and its cooling end is connected to the heat conducting member extended into the projecting part, it is in a magnetic field using a refrigerant-free superconducting magnet. The height dimension of the heat treatment apparatus can be designed compactly.

磁場中熱処理装置の実施形態を示す縦断面図Longitudinal sectional view showing an embodiment of a heat treatment apparatus in a magnetic field 図１の超電導コイルを示す切欠き斜視図Cutaway perspective view showing the superconducting coil of FIG. 図２の変形例を示す切欠き斜視図Notched perspective view showing a modification of FIG.

以下、図面に基づき、本発明の実施形態を説明する。この磁場中熱処理装置は、図１に示すように、鉛直向き円筒形で中心孔１ａを有する輻射シールド１の中に鉛直向きソレノイド型の超電導コイル２が配置され、輻射シールド１が鉛直向きの貫通孔３ａを有する筒状の真空断熱容器３に、中心孔１ａに貫通孔３ａ部を通して収納されている。熱処理される被処理物Ｍを収納した筒状真空の炉容器２１は、真空断熱容器３の貫通孔３ａに鉛直向きに配置されており、超電導コイル２によって炉容器２１内の筒軸方向に均一な平行磁場が形成される。炉容器２１には被処理物Ｍを周囲から加熱するヒータ２２が設けられ、図示は省略するが、外周側が水冷されるようになっている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, in this magnetic field heat treatment apparatus, a vertically-oriented solenoid type superconducting coil 2 is arranged in a radiation shield 1 having a vertically-oriented cylindrical shape and a central hole 1a, and the radiation shield 1 penetrates vertically. A cylindrical vacuum heat insulating container 3 having a hole 3a is accommodated in the center hole 1a through the through hole 3a. A cylindrical vacuum furnace vessel 21 containing a workpiece M to be heat-treated is arranged vertically in the through hole 3a of the vacuum heat insulating vessel 3 and is uniformly distributed in the cylinder axis direction in the furnace vessel 21 by the superconducting coil 2. A parallel magnetic field is formed. The furnace vessel 21 is provided with a heater 22 that heats the workpiece M from the surroundings. Although not shown, the outer peripheral side is water-cooled.

前記輻射シールド１と真空断熱容器３の側部には、それぞれ突出部１ｂ、３ｂが形成され、真空断熱容器３の突出部３ｂの上面に、２段式のパルスチューブ冷凍機４が鉛直下向きに取り付けられている。超電導コイル２の下端面には熱良導体の銅で形成された熱伝導部材５が接続されて、真空断熱容器３の突出部３ｂの中の輻射シールド１の突出部１ｂ内に延出されており、冷凍機４の１段冷却端４ａが輻射シールド１の突出部１ｂに接続され、２段冷却端４ｂが突出部１ｂ内に延出された熱伝導部材５に接続されている。したがって、冷凍機４が高さ方向に大きく突出することがなく、装置全体の高さ寸法がコンパクトに設計されている。なお、冷凍機４の１段冷却端４ａは輻射シールド１を約４０Ｋに冷却し、２段冷却端４ｂは熱伝導部材５を介して超電導コイル２を約４Ｋに冷却する。   Protrusions 1b and 3b are formed on the side portions of the radiation shield 1 and the vacuum heat insulating container 3, respectively, and a two-stage pulse tube refrigerator 4 is placed vertically downward on the upper surface of the protrusion 3b of the vacuum heat insulating container 3. It is attached. A heat conducting member 5 formed of copper as a good thermal conductor is connected to the lower end surface of the superconducting coil 2 and extends into the protruding portion 1b of the radiation shield 1 in the protruding portion 3b of the vacuum heat insulating container 3. The first stage cooling end 4a of the refrigerator 4 is connected to the protruding portion 1b of the radiation shield 1, and the second stage cooling end 4b is connected to the heat conducting member 5 extending into the protruding portion 1b. Therefore, the refrigerator 4 does not protrude greatly in the height direction, and the height of the entire apparatus is designed to be compact. The first stage cooling end 4 a of the refrigerator 4 cools the radiation shield 1 to about 40 K, and the second stage cooling end 4 b cools the superconducting coil 2 to about 4 K via the heat conducting member 5.

図２は、前記超電導コイル２を示す。この超電導コイル２は、その全長に亙って延びるメインコイル２ａと、超電導コイル２の内側の磁場中心Ｏを含む磁場軸Ｓに垂直な面に対して対称に配置された一対のコレクションコイル２ｂとからなる。メインコイル２ａは超電導コイル２の内側に、磁場中心Ｏで凸形状の磁場Ｇ１を発生させ、一対のコレクションコイル２ｂは磁場中心Ｏで凹形状の磁場Ｇ２を発生させる。したがって、炉容器２１が配置される超電導コイル２の内側にはこれらの磁場Ｇ１、Ｇ２が合成された均一な平行磁場ＧＴが形成される。 FIG. 2 shows the superconducting coil 2. The superconducting coil 2 has a main coil 2a extending over its entire length, a pair of collection coils 2b arranged symmetrically with respect to a plane perpendicular to the magnetic field axis S including the magnetic field center O inside the superconducting coil 2. Consists of. The main coil 2 a generates a convex magnetic field G 1 at the magnetic field center O inside the superconducting coil 2, and the pair of collection coils 2 b generates a concave magnetic field G 2 at the magnetic field center O. Thus, the inside of the superconducting coil 2 the reactor vessel 21 is arranged these fields G 1, G 2 uniform parallel magnetic field G T synthesized is formed.

なお、前記メインコイル２ａを省略して、磁場中心Ｏに対して対称に配置した一対のコイルをメインコイルとすることもできる。この場合は、実施形態のものよりは磁場の平行度が低下するが、メインコイル２ａのみを配置した場合よりは磁場の平行度を向上させることができる。   The main coil 2a may be omitted, and a pair of coils arranged symmetrically with respect to the magnetic field center O may be used as the main coil. In this case, the parallelism of the magnetic field is lower than that of the embodiment, but the parallelism of the magnetic field can be improved as compared with the case where only the main coil 2a is arranged.

図３は、前記超電導コイル２の変形例を示す。この変形例では、前記メインコイル２ａの外周側に、メインコイル２ａが発生する磁場Ｇ１と逆向きの磁場Ｇ３を発生させる２つのシールドコイル２ｃが配置されている。この変形例では、超電導コイル２の外周側でのメインコイル２ａの磁場Ｇ１をシールドコイル２ｃの逆向きの磁場Ｇ３が打ち消し、超電導コイル２の外周側での漏洩磁場を小さくする。超電導コイル２の内周側では、メインコイル２ａの磁場Ｇ１の打ち消し量はシールドコイル２ｃが遠い外周側に配置されているので少なく、十分に大きい磁界ＧＴが形成される。なお、シールドコイル２ｃの配置数は２つに限定されることはない。 FIG. 3 shows a modification of the superconducting coil 2. In this modification, the outer periphery of the main coil 2a, 2 single shield coil 2c generating a magnetic field G 1 and the magnetic field G 3 in the opposite direction to the main coils 2a occurs is located. In this modification, cancel the magnetic field G 1 of the main coil 2a at the outer peripheral side of the superconducting coil 2 is the magnetic field G 3 opposite the shield coil 2c, to reduce the leakage magnetic field at the outer peripheral side of the superconducting coil 2. The inner periphery of the superconducting coil 2, the amount cancellation of the magnetic field G 1 of the main coil 2a is small since the shield coil 2c is disposed farther outer peripheral side, a sufficiently large magnetic field G T is formed. The number of shield coils 2c arranged is not limited to two.

上述した実施形態では、冷凍機をパルスチューブ冷凍機とし、真空断熱容器の突出部に鉛直下向きに取り付けたが、冷凍機はギフォードマクマホン冷凍機等の他のタイプのものとすることもでき、鉛直上向きまたは水平向きに取り付けることもできる。   In the embodiment described above, the refrigerator is a pulse tube refrigerator, and is attached vertically downward to the protrusion of the vacuum heat insulating container, but the refrigerator can be of other types such as a Gifford McMahon refrigerator, It can also be mounted upwards or horizontally.

１ 輻射シールド
１ａ 中心孔
１ｂ 突出部
２ 超電導コイル
２ａ メインコイル
２ｂ コレクションコイル
２ｃ シールドコイル
３ 真空断熱容器
３ａ 貫通孔
３ｂ 突出部
４ 冷凍機
４ａ １段冷却端
４ｂ ２段冷却端
５ 熱伝導部材
２１ 炉容器
２２ ヒータ DESCRIPTION OF SYMBOLS 1 Radiation shield 1a Center hole 1b Protrusion part 2 Superconducting coil 2a Main coil 2b Collection coil 2c Shield coil 3 Vacuum heat insulation container 3a Through-hole 3b Protrusion part 4 Refrigerator 4a First stage cooling end 4b Two stage cooling end 5 Heat conduction member 21 Furnace Container 22 heater

Claims (4)

被処理部材を収納した筒状の炉容器が鉛直向きに挿入される貫通孔を設けた筒状鉛直向きの真空断熱容器に、前記貫通孔に配置される炉容器内に平行磁場を形成する超電導コイルを配置して、前記炉容器内の被処理部材を加熱する加熱手段を設け、前記超電導コイルを冷凍機の冷却端で冷却する磁場中熱処理装置において、前記筒状鉛直向きの真空断熱容器の側部に突出部を形成し、この突出部内に前記超電導コイルに接続した熱良導体の熱伝導部材を延出させ、前記真空断熱容器の突出部の部位に前記冷凍機を配置して、その冷却端を前記突出部内に延出させた前記熱伝導部材に接続したことを特徴とする磁場中熱処理装置。   Superconductivity for forming a parallel magnetic field in a furnace vessel arranged in the through hole in a cylindrical vertical vacuum insulation vessel provided with a through hole into which a cylindrical furnace vessel containing a member to be processed is vertically inserted In the heat treatment apparatus in a magnetic field in which a coil is disposed to heat a member to be processed in the furnace vessel and the superconducting coil is cooled at a cooling end of a refrigerator, A protrusion is formed on the side, a heat conducting member of a good thermal conductor connected to the superconducting coil is extended into the protrusion, the refrigerator is disposed at the protrusion of the vacuum heat insulating container, and the cooling is performed. A heat treatment apparatus in a magnetic field, characterized in that an end is connected to the heat conducting member that extends into the protrusion. 前記超電導コイルが、鉛直向きの同軸上に配置された複数の円筒形コイルの組み合わせからなり、前記炉容器内に鉛直向きの平行磁場を形成するものであり、前記複数のコイルの少なくとも一対のコイルを、前記超電導コイル内側の磁場中心を含む磁場軸に垂直な面に対して対称に配置した請求項１に記載の磁場中熱処理装置。   The superconducting coil is a combination of a plurality of cylindrical coils arranged coaxially in the vertical direction, and forms a vertical parallel magnetic field in the furnace vessel. At least a pair of coils of the plurality of coils 2. The heat treatment apparatus in a magnetic field according to claim 1, wherein the heat treatment apparatus is arranged symmetrically with respect to a plane perpendicular to a magnetic field axis including a magnetic field center inside the superconducting coil. 前記超電導コイルが、鉛直向きの同軸上に配置された複数の円筒形コイルの組み合わせからなり、前記炉容器内に鉛直向きの平行磁場を形成するものであり、前記複数のコイルの少なくとも１つを、前記超電導コイル内側における磁場と逆向きの磁場を発生させるように、順向きの磁場を発生させる他のコイルの外周側に配置した請求項１または２に記載の磁場中熱処理装置。   The superconducting coil is a combination of a plurality of cylindrical coils arranged coaxially in the vertical direction, and forms a vertical parallel magnetic field in the furnace vessel. At least one of the plurality of coils is The heat treatment apparatus in a magnetic field according to claim 1 or 2, which is disposed on the outer peripheral side of another coil for generating a forward magnetic field so as to generate a magnetic field opposite to the magnetic field inside the superconducting coil. 前記冷凍機を２段式のパルスチューブ冷凍機とした請求項１乃至３のいずれかに記載の磁場中熱処理装置。   The heat treatment apparatus in a magnetic field according to any one of claims 1 to 3, wherein the refrigerator is a two-stage pulse tube refrigerator.
JP2011287424A 2011-12-28 2011-12-28 In-field heat treatment device Pending JP2013137131A (en)

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US9655291B2 (en) 2015-06-26 2017-05-16 Kobe Steel, Ltd. Multilayer magnetic shield
KR101969593B1 (en) * 2018-12-10 2019-08-13 케이. 에이. 티. (주) System
WO2024014783A1 (en) * 2022-07-12 2024-01-18 한국재료연구원 Magnetic field heat treatment device for manufacturing anisotropic bulk permanent magnet

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JPH0878737A (en) * 1994-08-31 1996-03-22 Mitsubishi Electric Corp Superconductive magnet
JP2001102211A (en) * 1999-09-28 2001-04-13 Sumitomo Heavy Ind Ltd Heat treatment system in magnetic field
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9655291B2 (en) 2015-06-26 2017-05-16 Kobe Steel, Ltd. Multilayer magnetic shield
KR101969593B1 (en) * 2018-12-10 2019-08-13 케이. 에이. 티. (주) System
WO2024014783A1 (en) * 2022-07-12 2024-01-18 한국재료연구원 Magnetic field heat treatment device for manufacturing anisotropic bulk permanent magnet

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