KR101736722B1 - 전단-보조 탄성 스탬프 전사에 의한 프린팅 반도체 소자 - Google Patents
전단-보조 탄성 스탬프 전사에 의한 프린팅 반도체 소자 Download PDFInfo
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- KR101736722B1 KR101736722B1 KR1020117014025A KR20117014025A KR101736722B1 KR 101736722 B1 KR101736722 B1 KR 101736722B1 KR 1020117014025 A KR1020117014025 A KR 1020117014025A KR 20117014025 A KR20117014025 A KR 20117014025A KR 101736722 B1 KR101736722 B1 KR 101736722B1
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Abstract
Description
도 2a는 전단 오프셋 프린팅을 위해 사용되어지는 복합 스탬프(composite stamp)의 3차원 개략도의 일예를 나타내는 도면이다.
도 2b는 전단 오프셋 프린팅과 함께 사용되어지는 다양한 스탬프 포스트의 개략적인 단면을 나타내는 도면이다.
도 3은 안티-새그(anti-sag) 및 고정 특징(stabilization feature)을 포함하는 탄성 스탬프의 전사면에 릴리프 특징을 위한 레이아웃의 일예를 나타내는 도면이다.
도 4a는 전사 프린팅 기구 헤드 장치에 부착된 보강된 복합 스탬프를 나타내는 개략적인 단면도이다. 도 4a는 프린트 기구 헤드에 전단 오프셋을 위한 실시예를 나타내는 도면이고, 도 4b는 수신 기판에 전단 오프셋을 위한 실시예를 나타내는 도면이고, 도 4c는 전사 프린팅 기구의 일 실시예의 사진을 나타내는 도면이다.
도 5는 도 4a의 화살표에 나타낸 플랜지를 장착한 강화된 복합 스탬프에 적용된 전단 오프셋의 기능으로서 실리콘 칩렛 전사 프린팅 이득을 그림으로 표현한 도면이다. 삽입물은 전사 프린트된 실리콘 칩렛의 3×2 서브-어레이의 고해상도 광학 이미지를 나타낸다.
도 6a는 힘이 적용된 상태에서 기판으로부터 박리(delamination)를 하는 스탬프 포스트의 유한요소 시뮬레이션(finite element simulation)을 수행하기 위해 사용된 복합 스탬프 모델을 나타내는 개략도이다.
도 6b는 도 5a에 나타낸 기판으로부터 박리하는 스탬프 포스트의 유한요소 시뮬레이션 결과를 나타내는 도면이다. 스탬프 내부 메시(mesh) 요소의 수직 변위는 등고선 플롯(contour plot)을 이용하여 나타낸다.
도 7a는 스탬프 글래스 백킹 레이어에 적용된 전단 오프셋의 기능으로서 복합 스탬프 포스트를 박리하기 위해 필요한 계산된 최대 에너지에 일반화된 에너지의 결과로 인실리코(in silico)의 플롯이다.
도 7b는 스탬프 글래스 백킹 레이어에 적용된 전단 오프셋의 기능으로서 복합 스탬프 포스트의 박리 비율의 결과로 인실리코의 플롯이다.
도 8a는 기판으로부터 박리하는 플랫(비구성된 프린팅 면) 스탬프의 유한요소 시뮬레이션을 수행하기 위해 사용된 복합 스탬프 모델의 개략도이다.
도 8b는 기판으로부터 박리하는 도 7a의 복합 스탬프의 결과로 유한요소 시뮬레이션을 나타내는 도면이다. 스탬프 내부 메시 요소의 수직 변위가 표시된다. 도면 명료성을 향상하기 위해, 형상이 변형된 스탬프는 100이란 인자로 확대된다.
도 9a는 복합 스탬프 글래스 백킹에 적용된 공기력의 기능으로서 에지 길이가 박릭된 복합 스탬프의 결과로 유한요소 시뮬레이션을 나타내는 도면이다.
도 9b는 스탬프 외부 에지에 수직 변위의 기능으로서 에지-길이가 박리된 복합 스탬프의 결과로 유한요소 시뮬레이션을 나타내는 도면이다.
도 10a는 복합 스탬프의 정상화된 시간 유닛당 65㎜의 일정한 박리 비율을 수행하기 위해 시간에 걸쳐 압력 프로필의 모델 예보를 제공하는 도면이다.
도 10b는 복합 스탬프의 일정한 박리 비율을 수행하기 위해 수직 동작 시간 코스(예를 들면, 스탬프 에지와 기판 사이의 수직 분리의 비율)의 모델 예보를 제공하는 도면이다.
도 10c는 최적화된 압력 및 수직 동작 프로필이 이행될 때, 시간(정상화된)의 기능으로서 박리된 에지 길이를 플로팅함으로써 복합 스탬프 박리 비율의 결과로 유한요소 시뮬레이션을 제공하는 도면이다.
Claims (33)
- 전사 가능한 반도체 소자를 프린팅 하는 방법에 있어서,
a) 반도체 소자가 지지되고, 상기 반도체 소자를 적어도 부분적으로 접촉하는 릴리프 특징(relief feature, 양각현상)의 3차원 패턴을 포함하는 전사면(transfer surface)을 가지는 탄성중합체 스탬프(elastomeric stmap)를 제공하는 단계;
b) 수신면(receiving surface)을 가지는 기판을 제공하는 단계;
c) 상기 탄성중합체 스탬프의 전사면이 지지하는 상기 반도체 소자와 상기 수신면 사이의 등각 접촉(conformal contact)하고, 그것에 의해 상기 수신면에 상기 반도체 소자의 적어도 일부분의 접촉을 수립하는 단계;
d) 상기 탄성중합체 스탬프를 상기 수신면에 대한 수평거리만큼 오프셋하고(offsetting), 그것에 의해 상기 전사면 또는 상기 수신면으로부터 상기 반도체 소자를 분리하지 않고 적어도 일부분의 상기 릴리프 특징의 패턴에 기계적 변형(mechanical deformation)을 발생시키는 단계; 및
e) 상기 수신면으로부터 상기 스탬프를 분리하고, 그것에 의해 상기 수신면에 상기 반도체 소자를 프린팅하는 단계;를 포함하고,
상기 오프셋하는 단계는,
상기 반도체 소자를 지지하는 상기 탄성중합체 스탬프의 전사면을 상기 기판에 대해 이동시키지 않고, 상기 릴리프 특징의 상부 부분을 상기 기판에 대해 이동시키며, 상기 릴리프 특징의 상부는 수직 거리만큼 상기 탄성중합체 스탬프의 전사면으로부터 분리되는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 1 항에 있어서,
상기 등각 접촉 단계는 상기 탄성 중합체 스탬프의 상면에 공기력(air pressure)을 적용하여 수립되는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 1 항에 있어서,
상기 오프셋하는 단계는 상기 탄성 중합체 스탬프에 면내 변위(in plane displacement)를 적용하는 단계를 포함하는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 3 항에 있어서,
상기 면내 변위는 5㎛이상 100㎛이하인 상기 수신면에 관하여 상기 탄성 중합체 스탬프의 상면 수평 변위를 포함하는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 2 항에 있어서,
상기 분리 단계는 상기 스탬프 상면에 적용된 상기 공기력을 감소시키는 단계를 포함하는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 1 항에 있어서, 상기 탄성 중합체 스탬프는,
a) 상기 전사면에 마주하는 상면을 가지는 탄성 중합체 레이어(elastomeric layer); 및
b) 저면을 가지는 리지 백킹 레이어(rigid backing layer)를 더 포함하되,
상기 저면은 상기 탄성 중합체 레이어 상면에 인접하여 위치되는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 6 항에 있어서,
상기 탄성 중합체 스탬프는 상기 리지 백킹 레이어에 실시 가능하게 접속된 강화 레이어(reinforcement layer)를 더 포함하되,
상기 강화 레이어는 상기 전사면 상에 상기 릴리프 특징의 적어도 일부분과 수직으로 일치하는 개구(opening)를 가지는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 1 항에 있어서,
건조 전사 프린팅 기구(dry transfer printing tool)에 상기 탄성 중합체 스탬프를 장착하는 단계를 더 포함하고,
상기 오프셋 단계는 상기 건조 전사 프린팅 수단에 면내 변위를 적용하고, 그것에 의해 상기 릴리프 특징의 적어도 일부분의 기계적 변형을 발생시키는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 8 항에 있어서,
상기 장착된 스탬프의 상면에 압력을 적용하는 단계를 더 포함하고, 그것에 의해 상기 스탬프와 상기 수신면 사이의 투영 접촉을 수립하는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 9 항에 있어서,
상기 스탬프는 상기 수신면에 관하여 수직방향으로 상기 탄성 중합체 스탬프에 장착된 상기 전사 프린팅 수단을 움직임으로써 상기 수신면으로부터 분리되는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 10 항에 있어서,
상기 압력은 상기 수신면으로부터 상기 스탬프를 분리하는 상기 수직방향 움직임 동안 변화하는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 11 항에 있어서,
상기 압력은 최대값으로부터 최소값으로 감소시키고, 상기 최대값은 4kPa 내지 10kPa 사이이고, 상기 최소값은 0kPa 내지 2kPa인 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 12 항에 있어서,
상기 압력은 비율(rate)을 감소시키고, 상기 수직방향 움직임 비율은 상기 수신면으로부터 상기 릴리프 특징의 박리 비율(delamination rate)을 제공하도록 선택되고, 상기 릴리프 특징의 박리 비율(delamination rate)은 박리 사이클에 걸쳐 평균 비율로부터 10% 이하로 변화하는 비율인 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 1 항에 있어서,
상기 릴리프 특징은 복수의 포스트(post)를 더 포함하는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 14 항에 있어서,
상기 복수의 포스트는 1% 내지 25%의 범위로부터 선택된 상기 전사면 상에 접촉 영역 단편(contacting area fraction)을 가지는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 15 항에 있어서, 상기 릴리프 특징은,
상기 포스트 사이의 산재된 복수의 고정 특징(stabilization feature);을 더 포함하고,
상기 고정 특징은 상기 포스트의 접촉 영역보다 작은 접촉 영역을 가지는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 1 항에 있어서,
상기 반도체 프린팅은 전사 프린팅 산출량을 제공하고,
상기 산출량은,
a) 접착물의 얇은 레이어로 코팅된 수신면에 대한 99.5%이상이거나,
b) 1mm/s 이상의 스탬프 박리 비율에 대한 99.5%이상인 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 1 항에 있어서,
a) 상기 스탬프와 상기 수신면을 광학적으로 정렬하는(aligning) 단계;
b) 상기 수신면으로부터 100㎛이하의 수직 분리 간격 내에 상기 반도체 소자를 위치시키는 단계; 및
c) 상기 스탬프의 상면에 압력을 적용하고, 그것에 의해 상기 스탬프와 상기 수신면 사이의 투영 접촉을 수립하는 단계;를 포함하는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 18 항에 있어서,
상기 압력은 상기 스탬프 상면에 일정한 공기력의 사용에 의해 적용되는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 1 항에 있어서,
상기 릴리프 특징의 상기 패턴은 복수의 반도체 소자를 지지하는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 1 항에 있어서,
상기 수신면은 접착물이 일부에만 도포된 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 1 항에 있어서,
상기 분리 단계는 상기 스탬프 또는 상기 수신면에 수직 오프셋(vertical offset)을 적용함으로써 상기 수신면에 대해 상기 스탬프를 제거하는 단계를 포함하는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 1 항에 있어서, 상기 오프셋 하는 단계는
a) 상기 스탬프에 면내 변위를 적용하거나,
b) 상기 수신면에 면내 변위를 적용함으로써 제공되는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 1 항에 있어서,
a) 상기 등각 접촉을 적어도 부분적으로 수립하도록 공기력을 적용하는 단계; 및
b) 상기 수신면으로부터 상기 스탬프를 수직으로 분리하는 단계;를 더 포함하고,
상기 공기력은 제 1 시간 간격에 걸쳐 변화하고 상기 수직 분리는 상기 제 1 시간 간격에 걸쳐 일정하게 유지되며, 상기 공기력은 상기 제 1 시간 간격에 겹치지 않는 제 2 시간 간격에 걸쳐 일정하게 유지되고, 상기 수직 분리가 상기 제 2 시간 간격 동안 증가하여, 상기 제 1 및 제 2 시간 간격에 걸쳐 평균 박리 비율에서 5% 이하로 편향하는 박리 비율을 유지하는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 1 항에 있어서,
상기 탄성중합체 스탬프가 오프셋이 되지 않은 방법의 전사 수율에 비해, 상기 반도체 소자의 전사 수율을 향상시키는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 25 항에 있어서,
상기 오프셋이 되지 않은 전사 수율에 대비한 상기 전사 수율의 향상은 4%보다 큰 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 1 항에 있어서,
탄성중합체 스탬프 릴리프 특징에서의 기계적 변형은 탄성중합체 스탬프의 전사면으로부터 반도체 소자의 전사를 위해 초기 박리 에너지를 감소시키는 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
- 제 27 항에 있어서,
상기 초기 박리 에너지의 감소는 오프셋이 되지 않은 상기 탄성중합체 스탬프의 박리 에너지에 0.1 내지 0.8 배인 것을 특징으로 하는 전사 가능한 반도체 소자를 프린팅 하는 방법.
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| US11613608P | 2008-11-19 | 2008-11-19 | |
| US61/116,136 | 2008-11-19 | ||
| PCT/US2009/065078 WO2010059781A1 (en) | 2008-11-19 | 2009-11-19 | Printing semiconductor elements by shear-assisted elastomeric stamp transfer |
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| KR20110118616A KR20110118616A (ko) | 2011-10-31 |
| KR101736722B1 true KR101736722B1 (ko) | 2017-05-17 |
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| EP2351068A1 (en) | 2011-08-03 |
| KR20110118616A (ko) | 2011-10-31 |
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