JP5107285B2 - 成膜装置、成膜方法、プログラム、およびコンピュータ可読記憶媒体 - Google Patents
成膜装置、成膜方法、プログラム、およびコンピュータ可読記憶媒体 Download PDFInfo
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- JP5107285B2 JP5107285B2 JP2009051257A JP2009051257A JP5107285B2 JP 5107285 B2 JP5107285 B2 JP 5107285B2 JP 2009051257 A JP2009051257 A JP 2009051257A JP 2009051257 A JP2009051257 A JP 2009051257A JP 5107285 B2 JP5107285 B2 JP 5107285B2
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- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
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- C23C16/45523—Pulsed gas flow or change of composition over time
- C23C16/45525—Atomic layer deposition [ALD]
- C23C16/45544—Atomic layer deposition [ALD] characterized by the apparatus
- C23C16/45548—Atomic layer deposition [ALD] characterized by the apparatus having arrangements for gas injection at different locations of the reactor for each ALD half-reaction
- C23C16/45551—Atomic layer deposition [ALD] characterized by the apparatus having arrangements for gas injection at different locations of the reactor for each ALD half-reaction for relative movement of the substrate and the gas injectors or half-reaction reactor compartments
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- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
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- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
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- C23C16/54—Apparatus specially adapted for continuous coating
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- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0616—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating
- G01B11/0683—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating measurement during deposition or removal of the layer
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Description
(ウエハ搬入工程)
始めに、ウエハWがサセプタ2上に載置される工程について、主として図10と図11を参照しながら説明する。まず、サセプタ2を回転して載置部24を搬送口15に整列させ、ゲートバルブ(図示せず)を開く。次に、図9に示すように、ウエハWが搬送アーム10によって搬送口15を通して真空容器1内に搬入され、載置部24の上方に保持される(図9参照)。次いで、昇降ピン16が上昇して搬送アーム10からウエハWを受け取り、搬送アーム10が真空容器1から退出し、ゲートバルブ(図示せず)が閉まり、昇降ピン16が下降してウエハWをサセプタトレイ201の載置部24に載置する。
この一連の動作が、一ランで処理されるウエハの枚数に等しい回数繰り返されると、ウエハ搬入が終了する。
ウエハ搬入後、真空ポンプ64(図1)により真空容器1内が予め設定した圧力にまで排気される。次に、サセプタ2が上から見て時計回りに回転(公転)を開始する。サセプタ2およびサセプタトレイ201は、ヒータユニット7により前もって所定の温度(例えば300℃)に加熱されており、ウエハWは、載置部24に載置されることにより加熱される。ウエハWが加熱され、所定の温度に維持されたことが温度センサ(図示せず)により確認された後、第1の反応ガス(BTBAS)が第1の反応ガス供給ノズル31を通して第1の処理領域へ供給され、第2の反応ガス(O3)が第2の反応ガス供給ノズル32を通して第2の処理領域P2へ供給される。加えて、分離ガス供給ノズル41、42から分離ガス(N2)が供給される。
上述のようにして成膜している間に、以下の膜厚測定が行われる。
始めに、サセプタ2の回転速度に応じた測定タイミングが決定される。測定タイミングは、サセプタ2を回転する回転軸22の外周の所定の位置(例えば、サセプタ2の載置部24に対応した位置)に、例えば磁石を取り付けて回転軸22とも回転させ、所定のヘッドで磁気の変化を測定することにより把握することができる。
成膜工程終了後、真空容器1内をパージする。次いで、ウエハWが、搬入動作と逆の動作により搬送アーム10により真空容器1から順次搬出される。すなわち、載置部24が搬送口15に整列し、ゲートバルブが開いた後、昇降ピン16が上昇してウエハWをサセプタトレイ201の上方に保持する。次に、搬送アーム10がウエハWの下方にまで進入し、昇降ピン16が下降して、搬送アーム10によりウエハWが受け取られる。この後、搬送アーム10が真空容器1から退出し、ウエハWを真空容器1から搬出する。これにより、一のウエハWの搬出が終了する。続けて、上記の動作が繰り返されて、サセプタ2上のすべてのウエハWが搬出される。
図10は、ガスノズル31,32,41,42から真空容器1内へ供給されたガスのフローパターンを模式的に示す図である。図示のとおり、第2の反応ガス供給ノズル32から吐出されたO3ガスの一部は、サセプタ2の表面(及びウエハWの表面)に当たって、その表面に沿ってサセプタ2の回転方向と逆の方向に流れる。次いで、このO3ガスは、サセプタ2の回転方向の上流側から流れてきたN2ガスに押し戻され、サセプタ2の周縁と真空容器1の内周壁の方へ向きを変える。最後に、O3ガスは、排気領域6に流れ込み、排気口62を通して真空容器1から排気される。
・サセプタ2の回転速度: 1−500rpm(ウエハWの直径が300mmの場合)
・真空容器1の圧力: 1067 Pa(8 Torr)
・ウエハ温度: 350℃
・BTBASガスの流量: 100 sccm
・O3ガスの流量: 10000 sccm
・分離ガス供給ノズル41,42からのN2ガスの流量: 20000 sccm
・分離ガス供給管51からのN2ガスの流量: 5000 sccm
・サセプタ2の回転数: 600回転(必要な膜厚による)
この実施形態による成膜装置200によれば、成膜装置200が、BTBASガスが供給される第1の処理領域と、O3ガスが供給される第2の処理領域との間に、低い天井面44を含む分離領域Dを有しているため、BTBASガス(O3ガス)が第2の処理領域P2(第1の処理領域P1)へ流れ込むのが防止され、O3ガス(BTBASガス)と混合されるのが防止される。したがって、ウエハWが載置されたサセプタ2を回転させて、ウエハWを第1の処理領域P1、分離領域D、第2の処理領域P2、及び分離領域Dを通過させることにより、酸化シリコン膜の分子層成膜が確実に実施される。また、BTBASガス(O3ガス)が第2の処理領域P2(第1の処理領域P1)へ流れ込みO3ガス(BTBASガス)と混合するのを更に確実に防止するため、分離領域Dは、N2ガスを吐出する分離ガス供給ノズル41,42を更に含む。さらに、この実施形態による成膜装置200の真空容器1は、N2ガスが吐出される吐出孔を有する中心領域Cを有しているため、中心領域Cを通ってBTBASガス(O3ガス)が第2の処理領域P2(第1の処理領域P1)へ流れ込みO3ガス(BTBASガス)と混合されるのを防止することができる。さらにまた、BTBASガスとO3ガスが混合されないため、サセプタ2への酸化シリコンの成膜が殆ど生じず、よって、パーティクルの問題を低減することができる。
図22は、本発明の他の実施形態による基板処理装置700の概略上面図である。図示のとおり、基板処理装置700は、2つの真空容器111と、それぞれの真空装置111の側壁の搬送口に取り付けられた搬送路270aと、搬送路270aに取り付けられたゲートバルブ270Gと、ゲートバルブ270Gにより連通可能に設けられる搬送モジュール270と、搬送モジュール270にそれぞれゲートバルブ272Gを介して接続されるロードロック室272a、272bとを有している。
Claims (11)
- 容器内にて、互いに反応する少なくとも2種類の反応ガスを順番に基板に供給するサイクルを実行して反応生成物の層を当該基板上に生成することにより膜を堆積する成膜装置であって、
前記容器内に回転可能に設けられ、一の面に画定されて前記基板が載置される載置領域を有するサセプタ;
前記容器の前記サセプタに対向する部分に、前記容器に対して気密に設けられる窓部;
前記サセプタに載置される前記基板に堆積される膜の膜厚を前記窓部を通して光学的に測定する膜厚測定部;
前記一の面に第1の反応ガスを供給するよう構成される第1の反応ガス供給部;
前記サセプタの回転方向に沿って前記第1の反応ガス供給部から離れた、前記一の面に第2の反応ガスを供給するよう構成される第2の反応ガス供給部;
前記回転方向に沿って、前記第1の反応ガスが供給される第1の処理領域と前記第2の反応ガスが供給される第2の処理領域との間に位置し、前記第1の処理領域と前記第2の処理領域とを分離する分離領域;
前記第1の処理領域と前記第2の処理領域とを分離するために、前記容器の中央部に位置し、前記一の面に沿って第1の分離ガスを吐出する吐出孔を有する中央領域;および
前記容器内を排気するために前記容器に設けられた排気口;
を備え、
前記分離領域が、第2の分離ガスを供給する前記サセプタの直径方向に伸びる複数の供給孔を有する分離ガス供給部と、前記分離ガス供給部を収容すると共に、前記第2の分離ガスが前記回転方向に対し前記分離領域から前記処理領域側へ流れることができる狭隘な空間を、前記サセプタの前記一の面に対して形成する天井面と、を含む成膜装置。 - 前記膜厚測定部が、前記基板の複数の点のそれぞれに対して光を照射し、当該照射した光の反射光を受光する複数の投受光部を含む、請求項1に記載の成膜装置。
- 前記基板に成膜された膜について前記膜厚測定部により測定された膜厚と、当該膜の目標膜厚とが比較され、当該比較の結果、前記測定された膜厚が前記目標膜厚以上と判定された場合、成膜を停止するように構成される、請求項1または2に記載の成膜装置。
- 前記膜厚測定部がエリプソメータを含む、請求項1から3のいずれか一項に記載の成膜装置。
- 容器内にて、互いに反応する少なくとも2種類の反応ガスを順番に基板に供給するサイクルを実行して反応生成物の層を当該基板上に生成することにより膜を堆積する成膜方法であって、
前記容器内に回転可能に設けられたサセプタの載置領域であって、一の面に画定され前記基板が載置される載置領域に、前記基板を載置するステップ;
前記基板が載置されたサセプタを回転するステップ;
第1の反応ガス供給部から前記サセプタへ第1の反応ガスを供給するステップ;
前記サセプタの回転方向に沿って前記第1の反応ガス供給部から離れた第2の反応ガス供給部から前記サセプタへ第2の反応ガスを供給するステップ;
前記第1の反応ガス供給部から前記第1の反応ガスが供給される第1の処理領域と前記第2の反応ガス供給部から前記第2の反応ガスが供給される第2の処理領域との間に位置する分離領域の天井面に収容された、前記サセプタの直径方向に伸びる複数の供給孔を有する分離ガス供給部から、第1の分離ガスを供給し、前記分離領域の天井面と前記サセプタとの間に形成される狭隘な空間において前記回転方向に対し前記分離領域から前記処理領域側に前記第1の分離ガスを流すステップ;
前記容器の中央部に位置する中央部領域に形成される吐出孔から第2の分離ガスを供給するステップ;
前記容器を排気するステップ;
前記回転するステップにより回転されるサセプタ上の前記基板に光を照射するステップ;
前記光を照射するステップにより前記基板に照射された光の反射光を受光するステップ;
前記受光するステップにより受光した前記反射光の分光強度を利用して前記基板上に成膜される膜の膜厚を計算するステップ;
を含む、成膜方法。 - 前記照射するステップにおいて、複数の光ビームが前記基板に対して照射され、当該複数の光ビームに対応する複数の反射ビームがそれぞれ受光され、
前記膜の膜厚を計算するステップにおいて、前記複数の反射ビームそれぞれの分光強度が利用されて、前記膜の膜厚が形成される、請求項5に記載の成膜方法。 - 前記膜の膜厚を計算するステップにおいて計算された膜厚と、当該膜の目標膜厚とを比較するステップを更に含む、請求項5または6に記載の成膜方法。
- 前記比較するステップにおける比較の結果、前記計算された膜厚が前記目標膜厚以上と判定された場合に、前記第1の反応ガスと前記第2の反応ガスの供給を停止するステップを更に含む、請求項5から7のいずれか一項に記載の成膜方法。
- 前記膜の膜厚を計算するステップにおいて、エリプソメトリにより前記膜厚が計算される、請求項5から8のいずれか一項に記載の成膜方法。
- 請求項1から4のいずれか一項に記載の成膜装置に、請求項5から9のいずれか一項に記載の成膜方法を実施させるプログラム。
- 請求項10に記載のプログラムを格納するコンピュータ可読記憶媒体。
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CN100487948C (zh) * | 2004-03-03 | 2009-05-13 | 三洋电机株式会社 | 测定沉积膜厚度的方法及装置和形成材料层的方法及装置 |
DE102004056170A1 (de) * | 2004-08-06 | 2006-03-16 | Aixtron Ag | Vorrichtung und Verfahren zur chemischen Gasphasenabscheidung mit hohem Durchsatz |
US20060073276A1 (en) * | 2004-10-04 | 2006-04-06 | Eric Antonissen | Multi-zone atomic layer deposition apparatus and method |
US7908993B2 (en) * | 2005-08-24 | 2011-03-22 | Brother Kogyo Kabushiki Kaisha | Film forming apparatus, film forming method and method for manufacturing piezoelectric actuator |
US20070218702A1 (en) * | 2006-03-15 | 2007-09-20 | Asm Japan K.K. | Semiconductor-processing apparatus with rotating susceptor |
US20070215036A1 (en) * | 2006-03-15 | 2007-09-20 | Hyung-Sang Park | Method and apparatus of time and space co-divided atomic layer deposition |
US8187679B2 (en) * | 2006-07-29 | 2012-05-29 | Lotus Applied Technology, Llc | Radical-enhanced atomic layer deposition system and method |
JP4980672B2 (ja) * | 2006-08-23 | 2012-07-18 | 大陽日酸株式会社 | 気相成長装置 |
CN101755073B (zh) * | 2007-07-30 | 2011-10-12 | Ips股份有限公司 | 在晶圆上沉积薄膜的反应器 |
-
2009
- 2009-03-04 JP JP2009051257A patent/JP5107285B2/ja active Active
-
2010
- 2010-02-26 US US12/713,250 patent/US20100227046A1/en not_active Abandoned
- 2010-03-03 KR KR1020100018788A patent/KR101572698B1/ko active Active
- 2010-03-03 TW TW099106055A patent/TWI486483B/zh active
- 2010-03-03 CN CN201010122656.2A patent/CN101826447B/zh active Active
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TWI486483B (zh) | 2015-06-01 |
JP2010206026A (ja) | 2010-09-16 |
KR101572698B1 (ko) | 2015-11-27 |
US20100227046A1 (en) | 2010-09-09 |
CN101826447B (zh) | 2014-02-26 |
CN101826447A (zh) | 2010-09-08 |
KR20100100633A (ko) | 2010-09-15 |
TW201104013A (en) | 2011-02-01 |
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