JP2000234163A - Evaporating device for organic compound - Google Patents

Evaporating device for organic compound

Info

Publication number
JP2000234163A
JP2000234163A JP11137917A JP13791799A JP2000234163A JP 2000234163 A JP2000234163 A JP 2000234163A JP 11137917 A JP11137917 A JP 11137917A JP 13791799 A JP13791799 A JP 13791799A JP 2000234163 A JP2000234163 A JP 2000234163A
Authority
JP
Japan
Prior art keywords
vapor
crucible
substrate
heater
organic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP11137917A
Other languages
Japanese (ja)
Other versions
JP3095740B2 (en
Inventor
Yoshiaki Ito
嘉亮 伊藤
Kazuo Honda
和夫 本田
Kazuhiro Watabe
一博 渡部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fukushima Prefecture
Original Assignee
Fukushima Prefecture
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fukushima Prefecture filed Critical Fukushima Prefecture
Priority to JP11137917A priority Critical patent/JP3095740B2/en
Publication of JP2000234163A publication Critical patent/JP2000234163A/en
Application granted granted Critical
Publication of JP3095740B2 publication Critical patent/JP3095740B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To prevent the contamination of an organic thin film caused by the re-evaporation of a raw material organic material from the wall surface in a vacuum vessel by opening a vapor jetting hole having smaller hole diameter than the inside diameter of a crucible on an upper cap part of a heat shielding box and forming the vapor jetting hole so as to gradually decrease the hole diameter toward the upper surface part from the bottom surface part. SOLUTION: Because a heater 4 is housed in the heat shielding box 8 and the upper part is covered with the upper cap part 9 in this device, the heating by the radiant heat of the heater 4 is prevented to prevent the heating of the inside wall surface in the vacuum vessel 1. And because the vapor jetting hole 10 disposed on the upper cap part 9 has conical cross section and the hole diameter is smaller than the inside diameter of the crucible 3, a vapor reservoir is formed in the heat shielding box 8 to increase the internal pressure. Further, the inside diameter of the vapor jetting hole 10 is gradually decreased toward the upper surface part from the bottom surface of the upper cap part 9 to narrow the cross section through which the evaporated vapor is passed and the vapor advances straight toward the upper side to be efficiently vapor- deposited on an oppositely arranged substrate 6.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、有機化合物の薄膜
を形成する際に用いる有機化合物用蒸発装置に関するも
のである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic compound evaporator used for forming a thin film of an organic compound.

【0002】[0002]

【従来の技術】従来、有機化合物の薄膜形成用の蒸発装
置としては、ガラスや石英もしくはセラミックスなどで
形成されたるつぼの周囲に、線状または面状のヒーター
を配置し、るつぼを加熱して原料有機物を蒸発させて、
この蒸気を基板の表面に蒸着させて形成する方法が一般
的である。
2. Description of the Related Art Conventionally, as an evaporator for forming a thin film of an organic compound, a linear or planar heater is arranged around a crucible made of glass, quartz, ceramics or the like, and the crucible is heated. Evaporate the raw organic matter,
A general method is to form the vapor by vapor deposition on the surface of the substrate.

【0003】従来の有機化合物用蒸発装置は、るつぼか
ら蒸発した原料有機物の蒸気が基板以外の真空槽の内壁
面にも付着する。この内壁面に付着した原料有機物は、
ヒーターの放出する赤外線等による輻射熱により加熱さ
れて、再度蒸気となって基板に付着するため、原料が異
なる有機物を蒸着させる場合に、基板が汚染されてしま
う問題がある。
[0003] In the conventional organic compound evaporator, the vapor of the raw material organic matter evaporated from the crucible adheres to the inner wall surface of the vacuum chamber other than the substrate. The raw material organic matter attached to this inner wall surface is
The substrate is heated by radiant heat generated by infrared rays or the like emitted from the heater and becomes a vapor again and adheres to the substrate. Therefore, when an organic material of a different material is deposited, there is a problem that the substrate is contaminated.

【0004】またヒーターの輻射熱は基板にも直接照射
されて基板の温度を上昇させるため、基板表面に蒸着し
た有機薄膜の変質を引き起こす問題もあった。このよう
なヒーターの輻射熱から基板を保護する方法としては、
基板と蒸発源との間に、スリットの入った熱遮蔽板を配
置する方法が知られている。しかしながら、この方法で
は基板の輻射熱による加熱は防止できるが、真空槽内壁
面への輻射を遮ることができないため、前述のごとく、
内壁面からの原料有機物の再蒸発による汚染の問題は解
決できなかった。
In addition, the radiation heat of the heater is directly applied to the substrate to raise the temperature of the substrate, which causes a problem that the organic thin film deposited on the substrate surface is deteriorated. As a method of protecting the substrate from the radiant heat of such a heater,
There is known a method of disposing a heat shield plate having a slit between a substrate and an evaporation source. However, this method can prevent the substrate from being heated by radiant heat, but cannot prevent radiation to the inner wall surface of the vacuum chamber.
The problem of contamination due to re-evaporation of raw material organic matter from the inner wall could not be solved.

【0005】[0005]

【発明が解決しようとする課題】本発明はかかる問題点
を解消し、真空槽内壁面からの原料有機物の再蒸発によ
る有機薄膜の汚染を防止すると共に、加熱による有機薄
膜の変質を防止した有機化合物用蒸発装置を提供するも
のである。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and to prevent the organic thin film from being contaminated due to the re-evaporation of the organic material from the inner wall surface of the vacuum chamber and to prevent the organic thin film from being deteriorated by heating. The present invention provides a compound evaporator.

【0006】[0006]

【課題を解決するための手段】本発明の請求項1記載の
有機化合物用蒸発装置は、真空槽内に、るつぼの周囲に
ヒーターを取付けた蒸発源を設け、ここから原料有機物
を蒸発させて、真空槽内の上部に設けた基板表面に有機
薄膜を形成する有機化合物用蒸発装置において、前記ヒ
ーターを取付けたるつぼを、内面にセラミックをコート
した熱遮蔽箱に収納し、この熱遮蔽箱の上部に取付けた
上蓋部に、孔径がるつぼの内径より小さい蒸気噴出孔を
開孔したことを特徴とするものである。
According to a first aspect of the present invention, there is provided an evaporating apparatus for an organic compound according to the first aspect of the present invention, wherein an evaporating source provided with a heater around a crucible is provided in a vacuum chamber, from which raw material organic substances are evaporated. In an organic compound evaporator for forming an organic thin film on the surface of a substrate provided in the upper portion of a vacuum chamber, the crucible to which the heater is attached is housed in a heat shielding box coated with ceramic on the inner surface. A steam ejection hole having a hole diameter smaller than the inner diameter of the crucible is formed in the upper lid portion attached to the upper portion.

【0007】また請求項2記載の有機化合物用蒸発装置
は、上蓋部に開孔した蒸気噴出孔の孔径が、その底面部
から上面部に向かって順次小さく形成されていることを
特徴とするものである。
According to a second aspect of the present invention, there is provided an evaporating apparatus for an organic compound, wherein the diameter of the steam ejection hole formed in the upper lid portion is gradually reduced from the bottom portion to the upper portion. It is.

【0008】[0008]

【発明の実施の形態】以下本発明の実施の一形態を図1
ないし図3を参照して説明する。図1において1は真空
槽で、これは真空排気系2に接続されて、内部を真空に
引くようになっている。また真空槽1内の下方には、2
個のるつぼ3、3が設けられ、このるつぼ3の周囲にヒ
ーター4を螺旋状に巻回して蒸発源が形成されている。
このるつぼ3は例えばガラスや石英で形成されている。
更にこの蒸発源の上方には、これと対向して基板6が基
板ホルダー7によって下向きに保持されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG.
This will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes a vacuum chamber, which is connected to a vacuum exhaust system 2 to evacuate the inside. In the lower part of the vacuum chamber 1, 2
The crucibles 3 are provided, and a heater 4 is spirally wound around the crucible 3 to form an evaporation source.
The crucible 3 is made of, for example, glass or quartz.
Further, above the evaporation source, a substrate 6 is held facing downward by a substrate holder 7.

【0009】ヒーター4を巻回したるつぼ3は、図2に
示すように上部が開口した円筒状の熱遮蔽箱8内に収納
され、この上部に上蓋部9が取付けられている。熱遮蔽
箱8と上蓋部9は、ガラスや石英、金属またはセラミッ
クスなど耐熱性にある材料で構成され、この熱遮蔽箱8
の内壁8aにはセラミックスがコーティングされてい
る。このコーティングするセラミックスとしては、例え
ば酸化アルミニウム、酸化珪素、酸化ジルコニウム、ま
たはそれらの混合物があり、またコーティングの方法は
溶射法やゾル−ゲル法などで行なわれる。
The crucible 3 around which the heater 4 is wound is housed in a cylindrical heat shielding box 8 having an open top as shown in FIG. 2, and an upper lid 9 is mounted on this top. The heat shielding box 8 and the upper lid 9 are made of a heat-resistant material such as glass, quartz, metal or ceramics.
Is coated with ceramics. The ceramic to be coated includes, for example, aluminum oxide, silicon oxide, zirconium oxide, or a mixture thereof, and the coating is performed by a thermal spraying method or a sol-gel method.

【0010】また上蓋部9はその中心に蒸気噴出孔10
が開孔されている。この蒸気噴出孔10は例えば図2お
よび図3に示すように、断面が円錐状をなし、その孔径
は上蓋部9の底面部から上面部に向かって順次小さく形
成されている。またこの蒸気噴出孔10の上部の内径は
るつぼ3の内径より小さく形成されている。なお上蓋部
9の内壁9aと蒸気噴出孔10の内面にも前記と同様に
セラミックスがコーティングされている。また図1に示
すように、るつぼ3と基板6との間には蒸気を遮蔽する
シャッター5が水平に設けられている。
The upper cover 9 has a steam outlet 10 at its center.
Is opened. As shown in FIGS. 2 and 3, for example, the steam ejection hole 10 has a conical cross section, and the diameter of the hole is gradually reduced from the bottom to the top of the upper lid 9. The inner diameter of the upper portion of the steam ejection hole 10 is formed smaller than the inner diameter of the crucible 3. The inner wall 9a of the upper lid 9 and the inner surface of the steam ejection hole 10 are also coated with ceramics as described above. Further, as shown in FIG. 1, a shutter 5 for shielding vapor is horizontally provided between the crucible 3 and the substrate 6.

【0011】上記構成の有機化合物用蒸発装置におい
て、先ず図1に示すように2個のるつぼ3、3に原料有
機物A、Bを別個に投入してから熱遮蔽箱8、8に収納
した後、上蓋部9を取付ける。次いでシャッター5を閉
じて、るつぼ3と基板6とを遮断した状態で、真空排気
系2で真空槽1内を排気して所定の真空状態にする。こ
の後、ヒーター4に通電して一方のるつぼ3内の原料有
機物Aを加熱する。原料有機物Aの蒸発速度が安定した
らシャッター5を開けて、原料有機物Aの蒸気を基板6
の表面に蒸着させて有機物薄膜を形成する。
In the evaporating apparatus for an organic compound having the above structure, first, as shown in FIG. 1, raw material organic substances A and B are separately charged into two crucibles 3 and 3 and then stored in heat shielding boxes 8 and 8. Attach the upper lid 9. Next, with the shutter 5 closed and the crucible 3 and the substrate 6 shut off, the vacuum chamber 1 is evacuated by the vacuum evacuation system 2 to a predetermined vacuum state. Thereafter, the heater 4 is energized to heat the organic material A in one crucible 3. When the evaporation rate of the raw material A is stabilized, the shutter 5 is opened, and the vapor of the raw material A is transferred to the substrate 6.
To form an organic thin film.

【0012】次にシャッター5を閉じて一方のるつぼ3
内の原料有機物Aの温度が低下するのを待って、今度は
隣接する他方のるつぼ3のヒーター4に通電して、原料
有機物Bを加熱する。この蒸発速度が安定したらシャッ
ター5を開けて、原料有機物Bの蒸気を基板6の表面に
蒸着させて複合した有機物薄膜を形成する。
Next, the shutter 5 is closed and one of the crucibles 3 is closed.
After the temperature of the raw material organic material A in the inside is lowered, the heater 4 of the other adjacent crucible 3 is energized to heat the raw material organic material B. When the evaporation rate is stabilized, the shutter 5 is opened, and the vapor of the raw material B is vapor-deposited on the surface of the substrate 6 to form a composite organic thin film.

【0013】従って、この蒸着装置ではヒーター4が熱
遮蔽箱8内に収納され、上部が上蓋部9で覆われている
ので、ヒーター4の輻射熱は遮蔽されて、真空槽1の内
壁面や基板6の輻射熱による加熱を防止することができ
る。また、蒸発源の周囲を囲む熱遮蔽箱8と上蓋部9の
内壁8a、9aにセラミックスがコーティングされてい
るので、ヒーター4からの輻射熱が効果的に遮蔽され
る。この結果、真空槽1の内壁面の加熱が防止され、こ
こに付着した原料有機物の再蒸発を防止することができ
ると共に、基板6の加熱による有機薄膜の変質も防止す
ることができる。
Therefore, in this vapor deposition apparatus, since the heater 4 is housed in the heat shielding box 8 and the upper part is covered by the upper lid 9, the radiant heat of the heater 4 is shielded, and the inner wall surface of the vacuum chamber 1 and the substrate are removed. 6 can be prevented from being heated by radiant heat. Further, since the heat shielding box 8 surrounding the periphery of the evaporation source and the inner walls 8a, 9a of the upper lid 9 are coated with ceramics, radiant heat from the heater 4 is effectively shielded. As a result, the heating of the inner wall surface of the vacuum chamber 1 is prevented, the re-evaporation of the raw material organic substances adhered thereto can be prevented, and the deterioration of the organic thin film due to the heating of the substrate 6 can also be prevented.

【0014】また上蓋部9に設けた蒸気噴出孔10は図
2に示すように断面が円錐状をなし、その孔径はるつぼ
3の内径より小さく形成されているので、熱遮蔽箱8内
に蒸気溜りが形成されて内圧が高くなる。その上、蒸気
噴出孔10の内径が上蓋部9の底面部から上面部に向か
って順次小さく形成され、蒸発する蒸気の通過断面が絞
られているので、蒸気が上方に向かって直進し、対向し
て配置した基板6に効率よく蒸着させることができる。
As shown in FIG. 2, the steam outlet 10 provided in the upper lid 9 has a conical cross section and the hole diameter is smaller than the inner diameter of the crucible 3, so that the steam A pool is formed and the internal pressure increases. In addition, since the inner diameter of the steam ejection hole 10 is gradually reduced from the bottom portion to the upper portion of the upper lid portion 9 and the passage cross section of the vapor to be evaporated is narrowed, the steam travels straight upward and faces the opposite side. Can be efficiently vapor-deposited on the substrate 6 arranged in such a manner.

【0015】また本発明の蒸気噴出孔10の形状として
は、この他に図4および図5に示すように、断面が中空
円球の一部を形成するように円弧状に順次内径が上方に
向かって小さく形成したものでも良い。また熱遮蔽箱8
は図6に示すように角筒状のものでも良く、この場合は
上蓋部9も四角形状に形成される。また上記説明では真
空槽1内に2個のるつぼ3を同時に配置した場合につい
て示したが、原料有機物ごとに1個ずつ配置して蒸着さ
せる方法でも良い。
In addition, as shown in FIG. 4 and FIG. 5, the shape of the steam ejection hole 10 of the present invention is such that the inner diameter is gradually increased in an arc shape so that the cross section forms part of a hollow sphere. It may be formed smaller toward the surface. Heat shielding box 8
As shown in FIG. 6, a rectangular tube may be used. In this case, the upper lid 9 is also formed in a square shape. In the above description, the case where two crucibles 3 are arranged at the same time in the vacuum chamber 1 has been described, but a method in which one crucible 3 is arranged for each raw material organic material and vapor deposition may be performed.

【0016】[0016]

【発明の効果】以上説明した如く本発明の請求項1記載
の有機化合物用蒸発装置によれば、原料有機物用のるつ
ぼを、熱遮蔽箱内に収納し、この上に蒸気噴出孔を開孔
した上蓋部を取付けると共に、内壁にセラミックスコー
ティングを施しているので、るつぼ以外の方向に輻射さ
れるヒーターの輻射熱を遮り、真空槽や基板の加熱を防
止して真空槽内壁面に付着した原料有機物の再蒸発によ
る有機物薄膜の汚染を防止することができると共に、基
板の加熱による有機物薄膜の変質も防止することができ
る。
As described above, according to the evaporating apparatus for an organic compound according to the first aspect of the present invention, a crucible for a raw material organic substance is housed in a heat shielding box, and a steam ejection hole is formed thereon. The upper cover is attached and the inner wall is coated with ceramics, so it blocks the radiant heat of the heater radiated in directions other than the crucible, prevents heating of the vacuum chamber and the substrate, and prevents the organic matter from adhering to the inner wall of the vacuum chamber. It is possible to prevent the organic thin film from being contaminated due to re-evaporation of the organic thin film, and also prevent the organic thin film from being deteriorated by heating the substrate.

【0017】更に請求項2記載の有機化合物用蒸発装置
は、上蓋部に開孔した蒸気噴出孔の孔径が、その底面部
から上面部に向かって順次小さく形成されているので、
上昇する蒸気に直進性が得られ、基板表面に効率よく蒸
着して真空槽内壁への付着を少なくすることができる。
Further, in the evaporating apparatus for an organic compound according to the second aspect, the diameter of the steam ejection hole formed in the upper lid portion is gradually reduced from the bottom portion to the upper portion.
Straightness is obtained for the ascending vapor, so that the vapor is efficiently vapor-deposited on the surface of the substrate and adhesion to the inner wall of the vacuum chamber can be reduced.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施の一形態による有機化合物用蒸発
装置の概略断面図である。
FIG. 1 is a schematic sectional view of an organic compound evaporator according to an embodiment of the present invention.

【図2】図1に示す熱遮蔽箱と上蓋部を拡大して示す斜
視図である。
FIG. 2 is an enlarged perspective view showing a heat shielding box and an upper cover part shown in FIG. 1;

【図3】図2に示す上蓋部の断面図である。FIG. 3 is a cross-sectional view of the upper cover shown in FIG.

【図4】本発明の他の実施の形態による上蓋部の断面図
である。
FIG. 4 is a cross-sectional view of an upper cover according to another embodiment of the present invention.

【図5】本発明の他の実施の形態による上蓋部の断面図
である。
FIG. 5 is a sectional view of an upper lid according to another embodiment of the present invention.

【図6】本発明の他の実施の形態による箱形の熱遮蔽箱
と四角形の上蓋部を示す斜視図である。
FIG. 6 is a perspective view showing a box-shaped heat shielding box and a rectangular upper cover according to another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 真空槽 2 真空排気系 3 るつぼ 4 ヒーター 5 シャッター 6 基板 7 基板ホルダー 8 熱遮蔽箱 8a 内壁 9 上蓋部 9a 内壁 10 蒸気噴出孔 DESCRIPTION OF SYMBOLS 1 Vacuum tank 2 Vacuum exhaust system 3 Crucible 4 Heater 5 Shutter 6 Substrate 7 Substrate holder 8 Heat shielding box 8a Inner wall 9 Top lid 9a Inner wall 10 Steam ejection hole

─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成12年4月5日(2000.4.5)[Submission date] April 5, 2000 (200.4.5)

【手続補正1】[Procedure amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】全文[Correction target item name] Full text

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【書類名】 明細書[Document Name] Statement

【発明の名称】 有機化合物用蒸発装置[Title of the Invention] Evaporator for organic compounds

【特許請求の範囲】[Claims]

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、有機化合物の薄膜
を形成する際に用いる有機化合物用蒸発装置に関するも
のである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic compound evaporator used for forming a thin film of an organic compound.

【0002】[0002]

【従来の技術】従来、有機化合物の薄膜形成用の蒸発装
置としては、ガラスや石英もしくはセラミックスなどで
形成されたるつぼの周囲に、線状または面状のヒーター
を配置し、るつぼを加熱して原料有機物を蒸発させて、
この蒸気を基板の表面に蒸着させて形成する方法が一般
的である。
2. Description of the Related Art Conventionally, as an evaporator for forming a thin film of an organic compound, a linear or planar heater is arranged around a crucible made of glass, quartz, ceramics or the like, and the crucible is heated. Evaporate the raw organic matter,
A general method is to form the vapor by vapor deposition on the surface of the substrate.

【0003】従来の有機化合物用蒸発装置は、るつぼか
ら蒸発した原料有機物の蒸気が基板以外の真空槽の内壁
面にも付着する。この内壁面に付着した原料有機物は、
ヒーターの放出する赤外線等による輻射熱により加熱さ
れて、再度蒸気となって基板に付着するため、原料が異
なる有機物を蒸着させる場合に、基板が汚染されてしま
う問題がある。
[0003] In the conventional organic compound evaporator, the vapor of the raw material organic matter evaporated from the crucible adheres to the inner wall surface of the vacuum chamber other than the substrate. The raw material organic matter attached to this inner wall surface is
The substrate is heated by radiant heat generated by infrared rays or the like emitted from the heater and becomes a vapor again to adhere to the substrate. Therefore, when an organic material of a different material is deposited, there is a problem that the substrate is contaminated.

【0004】またヒーターの輻射熱は基板にも直接照射
されて基板の温度を上昇させるため、基板表面に蒸着し
た有機薄膜の変質を引き起こす問題もあった。このよう
なヒーターの輻射熱から基板を保護する方法としては、
基板と蒸発源との間に、スリットの入った熱遮蔽板を配
置する方法が知られている。しかしながら、この方法で
は基板の輻射熱による加熱は防止できるが、真空槽内壁
面への輻射を遮ることができないため、前述のごとく、
内壁面からの原料有機物の再蒸発による汚染の問題は解
決できなかった。
In addition, the radiation heat of the heater is directly applied to the substrate to raise the temperature of the substrate, which causes a problem that the organic thin film deposited on the substrate surface is deteriorated. As a method of protecting the substrate from the radiant heat of such a heater,
There is known a method of disposing a heat shield plate having a slit between a substrate and an evaporation source. However, this method can prevent the substrate from being heated by radiant heat, but cannot prevent radiation to the inner wall surface of the vacuum chamber.
The problem of contamination due to re-evaporation of raw material organic matter from the inner wall could not be solved.

【0005】[0005]

【発明が解決しようとする課題】本発明はかかる問題点
を解消し、真空槽内壁面からの原料有機物の再蒸発によ
る有機薄膜の汚染を防止すると共に、加熱による有機薄
膜の変質を防止した有機化合物用蒸発装置を提供するも
のである。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and to prevent the organic thin film from being contaminated due to the re-evaporation of the organic material from the inner wall surface of the vacuum chamber and to prevent the organic thin film from being deteriorated by heating. The present invention provides a compound evaporator.

【0006】[0006]

【課題を解決するための手段】本発明の請求項1記載の
有機化合物用蒸発装置は、真空槽内に、るつぼの周囲に
ヒーターを取付けた蒸発源を設け、ここから原料有機物
を蒸発させて、真空槽内の上部に設けた基板表面に有機
薄膜を形成する有機化合物用蒸発装置において、前記ヒ
ーターを取付けたるつぼを、内面にセラミックをコート
した熱遮蔽箱に収納し、この熱遮蔽箱の上部に取付けた
上蓋部に、孔径がるつぼの内径より小さい蒸気噴出孔を
開孔し、且つこの蒸気噴出孔の孔径が、その底面部から
上面部に向かって順次小さく形成されていることを特徴
とするものである。
According to a first aspect of the present invention, there is provided an evaporating apparatus for an organic compound according to the first aspect of the present invention, wherein an evaporating source provided with a heater around a crucible is provided in a vacuum chamber, from which raw material organic substances are evaporated. In an organic compound evaporator for forming an organic thin film on the surface of a substrate provided in the upper portion of a vacuum chamber, the crucible to which the heater is attached is housed in a heat shielding box coated with ceramic on the inner surface. A steam outlet having a hole diameter smaller than the inner diameter of the crucible is formed in the upper lid portion attached to the upper portion, and the hole diameter of the steam outlet is formed gradually smaller from the bottom to the top. It is assumed that.

【0007】[0007]

【発明の実施の形態】以下本発明の実施の一形態を図1
ないし図3を参照して説明する。図1において1は真空
槽で、これは真空排気系2に接続されて、内部を真空に
引くようになっている。また真空槽1内の下方には、2
個のるつぼ3、3が設けられ、このるつぼ3の周囲にヒ
ーター4を螺旋状に巻回して蒸発源が形成されている。
このるつぼ3は例えばガラスや石英で形成されている。
更にこの蒸発源の上方には、これと対向して基板6が基
板ホルダー7によって下向きに保持されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG.
This will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes a vacuum chamber, which is connected to a vacuum exhaust system 2 to evacuate the inside. In the lower part of the vacuum chamber 1, 2
The crucibles 3 are provided, and a heater 4 is spirally wound around the crucible 3 to form an evaporation source.
The crucible 3 is made of, for example, glass or quartz.
Further, above the evaporation source, a substrate 6 is held facing downward by a substrate holder 7.

【0008】ヒーター4を巻回したるつぼ3は、図2に
示すように上部が開口した円筒状の熱遮蔽箱8内に収納
され、この上部に上蓋部9が取付けられている。熱遮蔽
箱8と上蓋部9は、ガラスや石英、金属またはセラミッ
クスなど耐熱性にある材料で構成され、この熱遮蔽箱8
の内壁8aにはセラミックスがコーティングされてい
る。このコーティングするセラミックスとしては、例え
ば酸化アルミニウム、酸化珪素、酸化ジルコニウム、ま
たはそれらの混合物があり、またコーティングの方法は
溶射法やゾル−ゲル法などで行なわれる。
The crucible 3 around which the heater 4 is wound is housed in a cylindrical heat shielding box 8 having an open top as shown in FIG. 2, and an upper lid 9 is attached to this top. The heat shielding box 8 and the upper lid 9 are made of a heat-resistant material such as glass, quartz, metal or ceramics.
Is coated with ceramics. The ceramic to be coated includes, for example, aluminum oxide, silicon oxide, zirconium oxide, or a mixture thereof, and the coating is performed by a thermal spraying method or a sol-gel method.

【0009】また上蓋部9はその中心に蒸気噴出孔10
が開孔されている。この蒸気噴出孔10は例えば図2お
よび図3に示すように、断面が円錐状をなし、その孔径
は上蓋部9の底面部から上面部に向かって順次小さく形
成されている。またこの蒸気噴出孔10の上部の内径は
るつぼ3の内径より小さく形成されている。なお上蓋部
9の内壁9aと蒸気噴出孔10の内面にも前記と同様に
セラミックスがコーティングされている。また図1に示
すように、るつぼ3と基板6との間には蒸気を遮蔽する
シャッター5が水平に設けられている。
The upper cover 9 has a steam outlet 10 at its center.
Is opened. As shown in FIGS. 2 and 3, for example, the steam ejection hole 10 has a conical cross section, and the diameter of the hole is gradually reduced from the bottom to the top of the upper lid 9. The inner diameter of the upper portion of the steam ejection hole 10 is formed smaller than the inner diameter of the crucible 3. The inner wall 9a of the upper lid 9 and the inner surface of the steam ejection hole 10 are also coated with ceramics as described above. Further, as shown in FIG. 1, a shutter 5 for shielding vapor is horizontally provided between the crucible 3 and the substrate 6.

【0010】上記構成の有機化合物用蒸発装置におい
て、先ず図1に示すように2個のるつぼ3、3に原料有
機物A、Bを別個に投入してから熱遮蔽箱8、8に収納
した後、上蓋部9を取付ける。次いでシャッター5を閉
じて、るつぼ3と基板6とを遮断した状態で、真空排気
系2で真空槽1内を排気して所定の真空状態にする。こ
の後、ヒーター4に通電して一方のるつぼ3内の原料有
機物Aを加熱する。原料有機物Aの蒸発速度が安定した
らシャッター5を開けて、原料有機物Aの蒸気を基板6
の表面に蒸着させて有機物薄膜を形成する。
In the evaporating apparatus for an organic compound having the above-mentioned structure, first, as shown in FIG. 1, raw material organic substances A and B are separately charged into two crucibles 3 and 3 and then stored in heat shielding boxes 8 and 8. Attach the upper lid 9. Next, with the shutter 5 closed and the crucible 3 and the substrate 6 shut off, the vacuum chamber 1 is evacuated by the vacuum evacuation system 2 to a predetermined vacuum state. Thereafter, the heater 4 is energized to heat the organic material A in one crucible 3. When the evaporation rate of the raw material A is stabilized, the shutter 5 is opened, and the vapor of the raw material A is transferred to the substrate 6.
To form an organic thin film.

【0011】次にシャッター5を閉じて一方のるつぼ3
内の原料有機物Aの温度が低下するのを待って、今度は
隣接する他方のるつぼ3のヒーター4に通電して、原料
有機物Bを加熱する。この蒸発速度が安定したらシャッ
ター5を開けて、原料有機物Bの蒸気を基板6の表面に
蒸着させて複合した有機物薄膜を形成する。
Next, the shutter 5 is closed and one of the crucibles 3 is closed.
After the temperature of the raw material organic material A in the inside is lowered, the heater 4 of the other adjacent crucible 3 is energized to heat the raw material organic material B. When the evaporation rate is stabilized, the shutter 5 is opened, and the vapor of the raw material B is vapor-deposited on the surface of the substrate 6 to form a composite organic thin film.

【0012】従って、この蒸着装置ではヒーター4が熱
遮蔽箱8内に収納され、上部が上蓋部9で覆われている
ので、ヒーター4の輻射熱は遮蔽されて、真空槽1の内
壁面や基板6の輻射熱による加熱を防止することができ
る。また、蒸発源の周囲を囲む熱遮蔽箱8と上蓋部9の
内壁8a、9aにセラミックスがコーティングされてい
るので、ヒーター4からの輻射熱が効果的に遮蔽され
る。この結果、真空槽1の内壁面の加熱が防止され、こ
こに付着した原料有機物の再蒸発を防止することができ
ると共に、基板6の加熱による有機薄膜の変質も防止す
ることができる。
Therefore, in this vapor deposition apparatus, the heater 4 is housed in the heat shield box 8 and the upper part is covered with the upper lid 9, so that the radiant heat of the heater 4 is shielded and the inner wall surface of the vacuum chamber 1 and the substrate are removed. 6 can be prevented from being heated by radiant heat. Further, since the heat shielding box 8 surrounding the periphery of the evaporation source and the inner walls 8a, 9a of the upper lid 9 are coated with ceramics, radiant heat from the heater 4 is effectively shielded. As a result, the heating of the inner wall surface of the vacuum chamber 1 is prevented, the re-evaporation of the raw material organic substances adhered thereto can be prevented, and the deterioration of the organic thin film due to the heating of the substrate 6 can also be prevented.

【0013】また上蓋部9に設けた蒸気噴出孔10は図
2に示すように断面が円錐状をなし、その孔径はるつぼ
3の内径より小さく形成されているので、熱遮蔽箱8内
に蒸気溜りが形成されて内圧が高くなる。その上、蒸気
噴出孔10の内径が上蓋部9の底面部から上面部に向か
って順次小さく形成され、蒸発する蒸気の通過断面が絞
られているので、蒸気が上方に向かって直進し、対向し
て配置した基板6に効率よく蒸着させることができる。
As shown in FIG. 2, the steam outlet 10 provided in the upper lid 9 has a conical cross section and the hole diameter is smaller than the inner diameter of the crucible 3, so that the steam A pool is formed and the internal pressure increases. In addition, since the inner diameter of the steam ejection hole 10 is gradually reduced from the bottom portion to the upper portion of the upper lid portion 9 and the passage cross section of the vapor to be evaporated is narrowed, the steam travels straight upward and faces the opposite side. Can be efficiently vapor-deposited on the substrate 6 arranged in such a manner.

【0014】また本発明の蒸気噴出孔10の形状として
は、この他に図4および図5に示すように、断面が中空
円球の一部を形成するように円弧状に順次内径が上方に
向かって小さく形成したものでも良い。また熱遮蔽箱8
は図6に示すように角筒状のものでも良く、この場合は
上蓋部9も四角形状に形成される。また上記説明では真
空槽1内に2個のるつぼ3を同時に配置した場合につい
て示したが、原料有機物ごとに1個ずつ配置して蒸着さ
せる方法でも良い。
In addition, as shown in FIGS. 4 and 5, the shape of the steam ejection hole 10 of the present invention is such that the inner diameter is gradually increased in an arc shape so that the cross section forms a part of a hollow sphere. It may be formed smaller toward the surface. Heat shielding box 8
As shown in FIG. 6, a rectangular tube may be used. In this case, the upper lid 9 is also formed in a square shape. Further, in the above description, the case where two crucibles 3 are arranged at the same time in the vacuum chamber 1 has been described, but a method in which one crucible 3 is arranged for each raw material organic material and vapor deposition may be performed.

【0015】[0015]

【発明の効果】以上説明した如く本発明の請求項1記載
の有機化合物用蒸発装置によれば、原料有機物用のるつ
ぼを、熱遮蔽箱内に収納し、この上に蒸気噴出孔を開孔
した上蓋部を取付けると共に、内壁にセラミックスコー
ティングを施しているので、るつぼ以外の方向に輻射さ
れるヒーターの輻射熱を遮り、真空槽や基板の加熱を防
止して真空槽内壁面に付着した原料有機物の再蒸発によ
る有機物薄膜の汚染を防止することができると共に、基
板の加熱による有機物薄膜の変質も防止することができ
る。
As described above, according to the evaporating apparatus for an organic compound according to the first aspect of the present invention, a crucible for a raw material organic substance is housed in a heat shielding box, and a steam ejection hole is formed thereon. The upper cover is attached and the inner wall is coated with ceramics, so it blocks the radiant heat of the heater radiated in directions other than the crucible, prevents heating of the vacuum chamber and the substrate, and prevents the organic matter from adhering to the inner wall of the vacuum chamber. It is possible to prevent the organic thin film from being contaminated due to re-evaporation of the organic thin film, and also prevent the organic thin film from being deteriorated by heating the substrate.

【0016】更に、上蓋部に開孔した蒸気噴出孔の孔径
が、その底面部から上面部に向かって順次小さく形成さ
れているので、上昇する蒸気に直進性が得られ、基板表
面に効率よく蒸着して真空槽内壁への付着を少なくする
ことができる。
Further, since the diameter of the steam ejection hole formed in the upper lid portion is gradually reduced from the bottom portion to the top portion, straightness is obtained for the ascending steam, and the substrate surface is efficiently placed on the surface. Vapor deposition can reduce adhesion to the inner wall of the vacuum chamber.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施の一形態による有機化合物用蒸発
装置の概略断面図である。
FIG. 1 is a schematic sectional view of an organic compound evaporator according to an embodiment of the present invention.

【図2】図1に示す熱遮蔽箱と上蓋部を拡大して示す斜
視図である。
FIG. 2 is an enlarged perspective view showing a heat shielding box and an upper cover part shown in FIG. 1;

【図3】図2に示す上蓋部の断面図である。FIG. 3 is a cross-sectional view of the upper cover shown in FIG.

【図4】本発明の他の実施の形態による上蓋部の断面図
である。
FIG. 4 is a cross-sectional view of an upper cover according to another embodiment of the present invention.

【図5】本発明の他の実施の形態による上蓋部の断面図
である。
FIG. 5 is a sectional view of an upper lid according to another embodiment of the present invention.

【図6】本発明の他の実施の形態による箱形の熱遮蔽箱
と四角形の上蓋部を示す斜視図である。
FIG. 6 is a perspective view showing a box-shaped heat shielding box and a rectangular upper cover according to another embodiment of the present invention.

【符号の説明】 1 真空槽 2 真空排気系 3 るつぼ 4 ヒーター 5 シャッター 6 基板 7 基板ホルダー 8 熱遮蔽箱 8a 内壁 9 上蓋部 9a 内壁 10 蒸気噴出孔[Description of Signs] 1 Vacuum tank 2 Vacuum exhaust system 3 Crucible 4 Heater 5 Shutter 6 Substrate 7 Substrate holder 8 Heat shield box 8a Inner wall 9 Top lid 9a Inner wall 10 Steam ejection hole

───────────────────────────────────────────────────── フロントページの続き (72)発明者 渡部 一博 福島県郡山市待池台1丁目12 福島県ハイ テクプラザ内 Fターム(参考) 4K029 BA62 CA01 DB06 DB12 DB18 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuhiro Watanabe 1-12 Machiikedai, Koriyama-shi, Fukushima Prefecture F-term in Fukushima High-Tech Plaza 4K029 BA62 CA01 DB06 DB12 DB18

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 真空槽内に、るつぼの周囲にヒーターを
取付けた蒸発源を設け、ここから原料有機物を蒸発させ
て、真空槽内の上部に設けた基板表面に有機薄膜を形成
する有機化合物用蒸発装置において、前記ヒーターを取
付けたるつぼを、内面にセラミックをコートした熱遮蔽
箱に収納し、この熱遮蔽箱の上部に取付けた上蓋部に、
孔径がるつぼの内径より小さい蒸気噴出孔を開孔したこ
とを特徴とする有機化合物用蒸発装置。
An organic compound for forming an organic thin film on a surface of a substrate provided in an upper portion of a vacuum chamber by providing an evaporation source having a heater mounted around a crucible in the vacuum chamber and evaporating raw material organic matter from the evaporation source. In the evaporator for use, the crucible to which the heater is attached is housed in a heat shielding box coated with ceramic on the inner surface, and an upper lid attached to the upper part of the heat shielding box,
An evaporator for an organic compound, wherein a vapor ejection hole having a diameter smaller than the inner diameter of a crucible is opened.
【請求項2】 上蓋部に開孔した蒸気噴出孔の孔径が、
その底面部から上面部に向かって順次小さく形成されて
いることを特徴とする請求項1記載の有機化合物用蒸発
装置。
2. The diameter of the steam ejection hole opened in the upper lid portion is:
2. The organic compound evaporator according to claim 1, wherein the evaporator is formed so as to be smaller in size from the bottom surface to the upper surface.
JP11137917A 1999-05-19 1999-05-19 Evaporator for organic compounds Expired - Fee Related JP3095740B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11137917A JP3095740B2 (en) 1999-05-19 1999-05-19 Evaporator for organic compounds

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Publication Number Publication Date
JP2000234163A true JP2000234163A (en) 2000-08-29
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Family

ID=15209714

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Country Link
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007123285A (en) * 2002-07-19 2007-05-17 Lg Electron Inc Vapor deposition source for vapor-depositing organic electroluminescent film
JP2009062566A (en) * 2007-09-05 2009-03-26 Sony Corp Evaporation apparatus, and method of manufacturing anode and battery using the same
JP2012026009A (en) * 2010-07-26 2012-02-09 Ulvac Japan Ltd Thin film deposition device
CN103866240A (en) * 2012-12-18 2014-06-18 圆益Ips股份有限公司 Thin film deposition device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007123285A (en) * 2002-07-19 2007-05-17 Lg Electron Inc Vapor deposition source for vapor-depositing organic electroluminescent film
JP2009062566A (en) * 2007-09-05 2009-03-26 Sony Corp Evaporation apparatus, and method of manufacturing anode and battery using the same
US8435594B2 (en) 2007-09-05 2013-05-07 Sony Corporation Evaporation apparatus, method of manufacturing anode using same, and method of manufacturing battery using same
KR101567599B1 (en) * 2007-09-05 2015-11-09 소니 주식회사 Evaporation apparatus method of manufacturing anode using same and method of manufacturing battery using same
JP2012026009A (en) * 2010-07-26 2012-02-09 Ulvac Japan Ltd Thin film deposition device
CN103866240A (en) * 2012-12-18 2014-06-18 圆益Ips股份有限公司 Thin film deposition device
CN103866240B (en) * 2012-12-18 2018-05-29 圆益Ips股份有限公司 Film deposition apparatus

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