KR101509529B1 - 3차원 형태의 구리 나노구조물 및 그 형성 방법 - Google Patents
3차원 형태의 구리 나노구조물 및 그 형성 방법 Download PDFInfo
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Abstract
본 발명에 의하면, 기존의 집속 이온빔식각법(focused ion beam etching, FIBE)에 의해 제작된 구리 나노 구조물 제작법의 한계를 극복하기 위하여 고밀도 플라즈마를 사용하여 파라데이 상자에 배치된 대면적 시편에 다방향 경사 플라즈마 식각을 진행한 후, 식각된 시편 틈에 구리막을 형성하고, 과도금된 구리막과 SiO2 마스크를 제거함으로써 균일한 배열(array)의 구리 나노 구조물을 형성할 수 있으며, 구리 나노구조물의 직경을 임의로 조절할 수 있으므로 높은 응용 가능성을 구현할 수 있는 효과가 있다.
Description
도 2는 종래기술 1에 의해 구현되는 Cl2 플라즈마를 이용한 Cu 식각 상태를 나타낸 사진이다.
도 3은 종래기술 2에 의한 3차원 나노구조체의 제조공정도이다.
도 4는 본 발명에 의한 3차원 형태의 구리 나노구조물 형성 방법을 도시한 블록도이다.
도 5는 본 발명에 의한 3차원 형태의 구리 나노구조물 형성 방법에 의한 공정 순서도이다.
도 6은 본 발명에 의한 3차원 형태의 구리 나노구조물 형성 방법에서 사용되는 파라데이 상자를 도시한 개략도이다.
도 7은 본 발명에 의한 3차원 형태의 구리 나노구조물 형성 방법에서 다방향 경사 플라즈마 식각 단계를 나타내는 개략도이다.
도 8은 본 발명에 의한 3차원 형태의 구리 나노구조물 형성 방법에서 과도금 구리 및 SiO2 마스크 제거 단계를 나타내는 개략도이다.
도 9는 본 발명에 의한 3차원 형태의 구리 나노구조물 형성 방법을 통해 구현된 3차원 구리 나노구조물을 나타내는 사시도이다.
도 10은 본 발명에 의한 3차원 형태의 구리 나노구조물 형성 방법을 통해 구현된 3차원 구리 나노구조물을 나타내는 정면도이다.
도 11은 본 발명에 의한 3차원 형태의 구리 나노구조물 형성 방법에서 구리 나노구조물의 각도와 직경을 임의로 조절하기 위한 참고도이다.
도 12는 본 발명에 의한 3차원 형태의 구리 나노구조물 형성 방법을 통해 구현된 3차원 구리 나노구조물의 다른 실시예를 나타내는 사진이다.
도 13은 본 발명에 의한 3차원 형태의 구리 나노구조물 형성 방법에서 사용되는 다른 실시예의 파라데이 상자를 도시한 개략도이다.
도 14는 도 13의 반구형 파라데이 상자가 본 발명에 적용될 때 샘플의 높이에 따라 변화하는 이온의 포커싱 포인트를 통한 식각 형상을 나타낸 확대도이다.
103: 실리콘 웨이퍼
104: SiO2 식각 중지층
105: 폴리 실리콘
106: SiO2 마스크
120: 3차원 식각구조물층
Claims (11)
- SiO2 마스크를 포함하는 구조로 시편을 제작하는 단계;
상기 시편에 3차원 식각구조물층을 형성하기 위해 다방향 경사 플라즈마 식각을 수행하는 단계;
상기 다방향 경사 플라즈마 식각 부위에 금속이 충진되도록 도금하는 단계;
금속층에서 과도금된 부분과 상기 SiO2 마스크를 제거하는 단계; 및
상기 시편 표면에서 3차원 식각구조물층인 금속을 제외한 부분을 제거하는 단계를 포함하는 3차원 형태의 구리 나노구조물 형성 방법.
- 제1항에 있어서,
상기 다방향 경사 플라즈마 식각 단계는, 파라데이 상자(Faraday cage)를 이용하여 상기 시편에 다방향 경사 플라즈마 식각을 수행하는 3차원 형태의 구리 나노구조물 형성 방법.
- 제2항에 있어서,
상기 다방향 경사 플라즈마 식각 단계는 이온 조사 방향 변경 또는 상기 이온 조사 방향 변경과 상기 시편을 회전시켜 실시하는 3차원 형태의 구리 나노구조물 형성 방법.
- 제1항에 있어서,
상기 금속 도금 단계는 무전해 도금법에 의해 실시하는 3차원 형태의 구리 나노구조물 형성 방법.
- 제1항에 있어서,
상기 금속층에서 과도금된 부분의 제거와 상기 SiO2 마스크의 제거는 화학적 기계 연마를 통해 실시하는 3차원 형태의 구리 나노구조물 형성 방법.
- 제1항에 있어서,
상기 금속층은 구리(Cu), W(텅스텐), Co(코발트), Ag(은), Au(금), Pt(백금) 및 Ni(니켈) 중 어느 하나가 적용되는 3차원 형태의 구리 나노구조물 형성 방법.
- 제2항에 있어서,
상기 다방향 경사 플라즈마 식각 단계는, 상기 파라데이 상자 내에 시편의 높이를 조절하여 이온의 포커싱 포인트에 따른 식각 형상을 제어하는 3차원 형태의 구리 나노구조물 형성 방법.
- 삭제
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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KR20130090733A KR101509529B1 (ko) | 2013-07-31 | 2013-07-31 | 3차원 형태의 구리 나노구조물 및 그 형성 방법 |
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