JP6983796B2 - 基板を処理する方法 - Google Patents
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Description
これらの及び他の考慮に対して、本発明の実施形態は有用であり得る。
(a)第1の方向に沿う寸法が低減し、一方、第1の方向に直交する第2の方向に沿う寸法が低減しない特徴、
(b)新しい特徴は、第1の方向の寸法が低減し、第1の方向に直交する第2の方向の最初の表面の特徴より寸法がより長い、新しい特徴、
(c)その最初の位置に対して、位置がシフトする特徴。
本明細書で用いられるように、用語「寸法」は、所定の方向に沿う表面の特徴などの特徴の長さ、幅、深さ又は高さを言うことができる。様々な実施形態において、表面の特徴は、最初の位置からシフトすることに加えて、サイズを低減することができる。いくつかの実施形態により、堆積動作において堆積される材料は第1の材料とすることができ、第1の材料は、マスク材料、すなわち、処理前のパターン化された特徴の材料、として用いられる第2の材料とは異なる。
Claims (15)
- 基板に表面の特徴を提供するステップであって、前記表面の特徴は、特徴の形状と、特徴の位置と、基板の平面内の第1の方向に沿う第1の寸法と、前記第1の方向に垂直な第2の方向に沿う第2の寸法とを備える、ステップと、
前記表面の特徴の上に、層の材料を備える層を堆積するステップと、
イオン照射において、イオンを入射角で前記基板の方へ前記第1の方向に沿って向けるステップであって、前記入射角は、前記基板の平面に対する垂線に対して、非ゼロの角度を形成する、ステップと、を有し、
前記イオン照射は、前記イオンと反応中性種とを備え、前記イオン照射は、前記層の材料を反応エッチングし、
前記イオンは、前記表面の特徴の第1の側壁の部分の上の前記層に衝突し、前記第1の側壁の部分は前記基板の平面に対して垂直に、かつ、前記第2の方向に沿って、延び、前記イオンは、前記表面の特徴の第2の側壁の部分の上の前記層に衝突せず、前記第2の側壁の部分は前記基板の平面に対して垂直に、かつ、前記第1の方向に沿って、延び、
変えられた表面の特徴が生成され、該変えられた表面の特徴は、前記第1の方向に沿う前記寸法、前記特徴の形状、又は、前記特徴の位置の内の少なくとも1つの前記表面の特徴と異なる、基板を処理する方法。 - 前記基板の表面の特徴は、空洞を備え、該空洞は、前記第1の方向に沿う第1の寸法と、前記第1の方向に垂直な第2の方向に沿う第2の寸法とを備え、
前記層を堆積する前記ステップは、前記空洞の収縮を実施するステップを有し、前記第1の寸法及び前記第2の寸法を低減する、請求項1記載の方法。 - 前記イオン照射は、前記層を前記第1の方向に沿って第1の量をエッチングするステップと、前記層を前記第2の方向に沿って第2の量をエッチングするステップとを有し、前記第2の量は前記第1の量より少ない、請求項2記載の方法。
- 前記空洞は、前記イオン照射の前に円の形状を備え、前記イオン照射の後に細長い形状を備える、請求項3記載の方法。
- 前記層の材料は、前記エッチングするステップの後に、前記空洞の底面から除去される、請求項3記載の方法。
- 前記空洞は、前記イオン照射の前に基板の材料内に形成され、前記イオン照射は、細長い形状を形成するために、前記第1の方向に沿って前記基板の材料をエッチングするステップを有し、前記細長い形状は前記第1の方向に沿って第3の寸法を備え、該第3の寸法は前記第1の寸法より大きい、請求項3記載の方法。
- 前記空洞は、前記層を堆積する前記ステップの前に、トレンチを備え、前記第1の寸法は前記第2の寸法より大きく、
前記層を堆積する前記ステップの後で、かつ、前記イオン照射の後に、前記トレンチは前記第2の方向に沿って第3の寸法を備え、該第3の寸法は前記第1の寸法より小さく、前記トレンチは、さらに、前記第1の方向に沿って前記第1の寸法を備える、請求項3記載の方法。 - 前記空洞は、前記層を堆積する前記ステップの前に、トレンチを備え、前記第1の寸法は前記第2の寸法より大きく、
前記層を堆積する前記ステップの後で、かつ、前記イオン照射の後に、前記トレンチは前記第2の方向に沿って第3の寸法を備え、該第3の寸法は前記第1の寸法より小さく、前記トレンチは、さらに、前記第1の方向に沿って第4の寸法を備え、前記第4の寸法は前記第1の寸法より大きい、請求項3記載の方法。 - 前記空洞の位置は、前記層を堆積する前記ステップの前の前記基板内の第1の位置から、前記イオン照射の後の前記基板内の第2の位置へ、シフトされる、請求項3記載の方法。
- 前記表面の特徴は前記基板の平面の上に広がり、
前記層を堆積する前記ステップの前に、前記表面の特徴は、前記第1の方向に沿う第1の特徴の寸法と、前記第1の方向に垂直な第2の方向に沿う第2の特徴の寸法とを備え、
前記層を堆積する前記ステップは、前記第1の特徴の寸法を第3の特徴の寸法へ増大するステップと、前記第2の特徴の寸法を第4の特徴の寸法へ増大するステップとを有し、
前記イオン照射は、前記第3の特徴の寸法を前記第4の特徴の寸法より小さい第5の特徴の寸法へ低減するステップを有する、請求項1記載の方法。 - 前記イオンは、リボンイオンビームとして向けられ、前記第1の方向に平行な軌跡を有する、請求項1記載の方法。
- 前記層を堆積する前記ステップは、前記層を前記基板の上に選択的に堆積するステップを有し、
前記層は、前記基板の第1の領域の上に第1の厚さを備え、前記基板の第2の領域の上に前記第1の厚さと異なる第2の厚さを備え、
前記層を堆積する前記ステップの後に、前記第1の方向に沿う前記表面の特徴の寸法は、前記第1の領域において第1の量だけ変えられ、前記第2の領域において第2の量だけ変えられる、請求項1記載の方法。 - 基板の中に空洞を提供するステップであって、前記空洞は、基板の平面内の第1の方向に沿う第1の寸法と、前記基板の平面内の第2の方向に沿う第2の寸法とを有し、前記第2の方向は前記第1の方向に垂直である、ステップと、
前記空洞内に、層の材料を備える層を堆積するステップと、
イオン照射において、イオンを入射角で前記基板の方へ前記第1の方向に沿って向けるステップであって、前記入射角は、前記基板の平面に対する垂線に対して、非ゼロの角度を形成する、ステップと、を有し、
前記イオン照射は、前記イオンと反応中性種とを備え、前記イオン照射は、前記層の材料を反応エッチングし、
前記イオンは、前記空洞の第1の側壁の部分に衝突し、前記第1の側壁の部分は前記基板の平面に対して垂直に、かつ、前記第2の方向に沿って、延び、前記イオンは、前記空洞の第2の側壁の部分に衝突せず、前記第2の側壁の部分は前記基板の平面に対して垂直に、かつ、前記第1の方向に沿って、延び、
前記第1の寸法は、前記第2の寸法に対して、選択的に変えられる、基板を処理する方法。 - 前記第1の寸法は低減されるが、前記第2の寸法は低減されない、請求項13記載の方法。
- 基板の中に空洞を提供するステップであって、前記空洞は、前記基板内の第1の空洞の位置に配置される、ステップと、
前記空洞内に、層の材料を備える層を堆積するステップと、
イオン照射において、イオンを入射角で前記基板の方へ第1の方向に沿って向けるステップであって、前記入射角は、基板の平面に対する垂線に対して、非ゼロの角度を形成する、ステップと、を有し、
前記イオン照射は、前記イオンと反応中性種とを備え、前記イオン照射は、前記層の材料を反応エッチングし、
前記イオンは、前記空洞の第1の側壁の部分に衝突し、前記第1の側壁の部分は前記基板の平面に対して垂直に、かつ、前記第1の方向に垂直である第2の方向に沿って、延び、前記イオンは、前記空洞の第2の側壁の部分に衝突せず、前記第2の側壁の部分は前記基板の平面に対して垂直に、かつ、前記第1の方向に沿って、延び、
前記空洞は、前記イオン照射の後に、前記基板内の第2の空洞の位置に配置される、基板を処理する方法。
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