JP2022162418A - 半導体製造装置および半導体装置の製造方法 - Google Patents
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Abstract
【解決手段】本開示に係る半導体製造装置は、ウエハを回転させる回転ステージと、前記ウエハの処理面に薬液を供給するノズルと、前記処理面の上方で、平面視で前記処理面を横切るようなスキャン軌跡上で、前記ノズルを移動させるノズル移動部と、を備え、前記ノズル移動部が前記ノズルを前記スキャン軌跡上の第1軌跡と第2軌跡で移動させることで、前記薬液により前記ウエハがエッチングされ、前記第1軌跡は、前記スキャン軌跡のうち前記回転軸に最も近接する部分に対して一方の側の第1折り返し点と他方の側の第2折り返し点で折り返す軌跡であり、前記第2軌跡は、前記スキャン軌跡上の第3折り返し点と、前記スキャン軌跡のうち前記回転軸に最も近接する部分に対して前記第3折り返し点と同じ側に設けられた第4折り返し点と、で折り返す軌跡である。
【選択図】図1
Description
図1は、実施の形態1に係る半導体製造装置100の斜視図である。半導体製造装置100は、ウェットエッチング処理を行うための装置である。半導体製造装置100は、ウエハ1を回転させる回転ステージ11を備える。図1の例では、ウエハ1は回転軸1aを中心として回転方向1cに回転する。回転機構部10において、回転ステージ11は回転モータ12と接続されることで回転する。
Claims (12)
- ウエハを回転させる回転ステージと、
前記ウエハの処理面に薬液を供給するノズルと、
前記処理面の上方で、平面視で前記処理面を横切るようなスキャン軌跡上で前記ノズルを移動させるノズル移動部と、
を備え、
前記ノズル移動部が前記ノズルを前記スキャン軌跡上の第1軌跡と第2軌跡で移動させることで、前記薬液により前記ウエハがエッチングされ、
前記第1軌跡は、前記スキャン軌跡のうち前記回転ステージの回転軸に最も近接する部分に対して一方の側の第1折り返し点と他方の側の第2折り返し点で折り返す軌跡であり、
前記第2軌跡は、前記スキャン軌跡上の第3折り返し点と、前記スキャン軌跡のうち前記回転軸に最も近接する部分に対して前記第3折り返し点と同じ側に設けられた第4折り返し点と、で折り返す軌跡であることを特徴とする半導体製造装置。 - 前記第1折り返し点と前記第2折り返し点は、平面視で前記回転軸からの一定の範囲である中心領域の外側に設けられ、
前記第2軌跡は、平面視で前記中心領域の外側に設けられることを特徴とする請求項1に記載の半導体製造装置。 - 前記第1軌跡でエッチングをした場合に、前記回転軸から離れるほどエッチング量は増加または減少し、
前記中心領域は、前記回転軸から前記エッチング量の増加または減少が収まるまでの範囲であることを特徴とする請求項2に記載の半導体製造装置。 - 前記ノズル移動部は、前記第1折り返し点または前記第2折り返し点が異なる複数の第1軌跡で前記ノズルを移動させることを特徴とする請求項1から3の何れか1項に記載の半導体製造装置。
- 前記ノズル移動部は、前記第3折り返し点または前記第4折り返し点が異なる複数の第2軌跡で前記ノズルを移動させることを特徴とする請求項1から4の何れか1項に記載の半導体製造装置。
- 前記ノズル移動部は、前記第1折り返し点または前記第2折り返し点が異なる複数の第1軌跡間で軌跡を切り替える場合、前記第3折り返し点または前記第4折り返し点が異なる複数の第2軌跡間で軌跡を切り替える場合、または、前記第1軌跡と前記第2軌跡との間で軌跡を切り替える場合に、切り替え時の前記ノズルの移動方向に切り替え後の軌跡の折り返し点があれば前記折り返し点で前記ノズルを折り返し、切り替え時の前記ノズルの移動方向に切り替え後の軌跡の折り返し点が無ければ、前記中心領域を外れた時点で前記ノズルを折り返すことを特徴とする請求項2または3に記載の半導体製造装置。
- 複数のステップを含む処理レシピに応じて前記ノズル移動部を制御する制御部を備え、
前記制御部には、前記複数のステップの各々について前記第1折り返し点および前記第2折り返し点、または、前記第3折り返し点および前記第4折り返し点が設定可能であることを特徴とする請求項1から6の何れか1項に記載の半導体製造装置。 - 前記ノズル移動部は、少なくとも1つの前記第1軌跡と少なくとも1つの前記第2軌跡で順番に前記ノズルを移動させ、前記少なくとも1つの第1軌跡と前記少なくとも1つの第2軌跡のうち最も均一性が良い軌跡で、最後に前記ノズルを移動させることを特徴とする請求項1から7の何れか1項に記載の半導体製造装置。
- 前記ウエハはワイドバンドギャップ半導体によって形成されていることを特徴とする請求項1から8の何れか1項に記載の半導体製造装置。
- 前記ワイドバンドギャップ半導体は、炭化珪素、窒化ガリウム系材料またはダイヤモンドであることを特徴とする請求項9に記載の半導体製造装置。
- 回転ステージにウエハを搭載し、
前記回転ステージで前記ウエハを回転させながら、前記ウエハの処理面の上方で、平面視で前記処理面を横切るようなスキャン軌跡上でノズルを移動させるノズル移動部により、前記ノズルを前記スキャン軌跡上の第1軌跡と第2軌跡で移動させて、前記ノズルから前記処理面に薬液を供給して前記ウエハをエッチングし、
前記第1軌跡は、前記スキャン軌跡のうち前記回転ステージの回転軸に最も近接する部分に対して一方の側の第1折り返し点と他方の側の第2折り返し点で折り返す軌跡であり、
前記第2軌跡は、前記スキャン軌跡上の第3折り返し点と、前記スキャン軌跡のうち前記回転軸に最も近接する部分に対して前記第3折り返し点と同じ側に設けられた第4折り返し点と、で折り返す軌跡であることを特徴とする半導体装置の製造方法。 - 前記第1軌跡による前記ウエハのエッチングと、前記第2軌跡による前記ウエハのエッチングは連続して実施されることを特徴とする請求項11に記載の半導体装置の製造方法。
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