JP2018195733A - 基板処理装置 - Google Patents
基板処理装置 Download PDFInfo
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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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Abstract
Description
基板を載置する載置台と、
前記載置台を下面側から支持する支持棒と、
前記載置台の下方に設けられ、前記支持棒を支持して回転軸周りに回転し、前記載置台を公転させる回転機構と、
前記載置台と前記回転機構との間に、載置台の公転領域に亘って設けられ、前記支持棒が移動する移動路に環状の切り欠きが形成され、基板の処理を行う処理空間の底面部となる伝熱板と、
前記伝熱板の上方であって、前記回転機構の回転により載置台が通過する領域に処理ガスを供給する処理ガス供給部と、を備えたことを特徴とする。
またヒータ26を伝熱板2に埋め込むようにしてもよい。発熱線26bを伝熱板2に埋め込むことで、ヒータ26の層を設ける必要がなく成膜装置1を小型化することができる。
また図3に示した伝熱板2に載置台3が移動する凹部を形成し、伝熱板2の周縁の上面の高さと載置台3上のウエハWの上面の高さとが揃うように構成してもよい。例えば図15に示すように伝熱板2の上面に載置台3が移動する環状の凹部201を形成する。この時伝熱板2の周縁側の縁部202と載置台3の移動領域の外周縁との間は、載置台3の移動を妨げないごく狭い隙間となっている。また伝熱板2の中心側の縁部203と載置台3の移動領域の内周縁との間も、載置台3の移動を妨げないごく狭い隙間となっている。さらに伝熱板2の周縁側の縁部202の上面の高さと、載置台3の縁部3aの上面の高さと、が揃い、伝熱板2の中心側の縁部203の上面の高さと、載置台3の縁部3aの上面の高さと、が揃うように構成されている。従って載置台3に載置されたウエハWの上面の高さと、伝熱板2の周縁側の縁部202の上面の高さ及び伝熱板2の中心側の縁部203の上面の高さと、が揃う。処理ガスは、吸着領域R1及び酸化領域R2に供給されると、伝熱板2及び載置台3の上面に沿って流れ、ウエハWに供給されるため、処理ガスが流れる面を平坦化し、処理ガスの気流を安定させることでウエハWの処理の面内均一性が向上する。
載置台3に載置されたウエハWの上面の高さと、伝熱板2の周縁側の縁部202の上面の高さ及び伝熱板2の中心側の縁部203の上面の高さ、さらには載置台3の縁部3aの上面の高さを揃えることで、ウエハW表面とウエハWの周囲との間で起伏が少なくなる。そのためウエハWの表面を流れる処理ガスの気流が安定しやすくなり、ウエハWの処理の面内均一性が向上する。
また駆動ギア500において、前記N極部501及びS極部502が配置された一面の反対側の面の中央部には駆動軸503の一端が接続されている。この駆動軸503の他端には図示しない回転駆動部504が設けられ、当該回転駆動部504を用いて駆動軸503を回転させることにより、駆動ギア500を回転中心回りに回転させることができる。また自転機構は各自転機構を個別に独立して自転させるモータなどで構成されていてもよい。
また上述の実施の形態では、従動ギア4と駆動ギア5との間には、磁力線を通す材料により構成された仕切り部材37を、大気雰囲気と真空雰囲気とを仕切るように設け、駆動ギア5を大気雰囲気側に設けている。このため、駆動ギア5側においてパーティクルが発生したとしても、真空容器11への進入が抑えられ、電気的な制御やメンテナンスが容易となる。さらに、駆動ギア5を大気雰囲気に設けると共に、従動ギア4をヒータ16から離れた領域に配置しているので、高温による磁力の低下を抑えることができる。
また本発明のガス供給部は、ガスを吐出する領域の周囲を囲むように環状の排気孔を設けると共に排気口の周囲に分離ガスを供給する環状の分離ガス供給孔を形成した構成でも良い。
また本発明は、基板にCVD法により成膜処理を行う装置でも良い。
11 真空容器
2 伝熱板
23 公転用回転機構
3 載置台
32 自転軸
34 軸受けユニット
4 従動ギア
5 駆動ギア
41、51 N極部
42、52 S極部
53 自転用回転機構
100 制御部
W ウエハ
Claims (12)
- 処理容器内にて基板に対して処理ガスを供給して成膜を行う基板処理装置において、
基板を載置する載置台と、
前記載置台を下面側から支持する支持棒と、
前記載置台の下方に設けられ、前記支持棒を支持して前記処理容器の周方向に前記載置台を公転させる公転機構と、
高さ方向で見て、前記載置台と公転機構との間に設けられ、前記載置台の公転領域を加熱するための加熱部と、
前記加熱部と前記載置台の公転領域との間に設けられ、前記加熱部からの熱を前記公転領域に伝熱するための伝熱板と、
前記載置台の公転領域に処理ガスを供給するための処理ガス供給部と、を備え、
前記加熱部及び伝熱板の各々は、前記支持棒の移動路を形成するように隙間を介して処理容器の中央側と外側とに分割されていることを特徴とする基板処理装置。 - 前記伝熱板の下面中央部を支持する支柱を備え、
前記公転機構は、前記支柱を囲む円環状に構成され、周方向に回転することで載置台を公転させる回転駆動部を備えることを特徴とする請求項1に記載の基板処理装置。 - 基板の受け渡しを行う受け渡し位置にある載置台上の基板を下方から突き上げて昇降させる昇降部材を備え、
前記昇降部材は、前記回転駆動部よりも下方側から伸び出すことを特徴とする請求項2に記載の基板処理装置。 - 処理ガス供給部は、前記載置台の公転領域の一部である第1の処理領域に向けて、原料ガスを供給する第1のガス供給部と、
前記第1の処理領域に対して、分離ガスが供給される分離領域を介して前記処理容器の周方向に離間する第2の処理領域に、前記原料ガスと反応する反応ガスを供給するための第2のガス供給部と、を備えることを特徴とする請求項1ないし3のいずれか一項に記載の基板処理装置。 - 前記伝熱板は、周方向に分割可能な複数の部材で構成されることを特徴とする請求項1ないし4のいずれか一項に記載の基板処理装置。
- 前記支持棒は、前記公転機構に自転自在に支持された自転軸として構成され、
前記自転軸を自転させる自転機構を備えることを特徴とする請求項1ないし5のいずれか一項に記載の基板処理装置。 - 前記自転機構は、前記自転軸に設けられ、回転することで自転軸を自転させる従動ギアと、
前記従動ギアの公転軌道に臨むように設けられ、前記従動ギアと磁気によりギアを構成する磁気ギア機構を構成する駆動ギアと、
前記駆動ギアを回転させるギア回転機構と、を備えたことを特徴とする請求項6に記載基板処理装置。 - 前記駆動ギアは前記従動ギアの公転軌道の全周に沿って設けられたことを特徴とする請求項7に記載の基板処理装置。
- 前記従動ギアは、自転方向に沿って全周に亘ってN極部及びS極部が交互に配列され、
前記駆動ギアは、前記公転軌道に沿って全周に亘ってN極部及びS極部が交互に配列されていることを特徴とする請求項7または8に記載基板処理装置。 - 前記従動ギアの各磁極部は、下面に中心部から横方向に放射状に延びるように設けられ、
前記駆動ギアの各磁極部は、前記従動ギアの下面と対向する面に配列されていることを特徴とする請求項7ないし9のいずれか一項に記載基板処理装置。 - 前記従動ギアの公転による角速度と前記駆動ギアの角速度との速度差の絶対値がゼロから、当該速度差と従動ギアの自転速度とがほぼ比例関係を維持している値までの間において、駆動ギアの角速度が設定されていることを特徴とする請求項7ないし10のいずれか一項に記載の基板処理装置。
- 前記従動ギアの自転速度と、前記速度差と、の関係が記憶された記憶部と、
前記従動ギアの自転速度を入力するための入力部と、
入力された従動ギアの自転速度と、載置台の公転の回転数と、前記記憶部に記憶された前記関係とに基づいて、前記駆動ギアの回転数を設定するためのデータ処理部と、を備えたことを特徴とする請求項7ないし11のいずれか一項に記載の基板処理装置。
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