KR101119890B1 - 전자 빔 노출 시스템 - Google Patents
전자 빔 노출 시스템 Download PDFInfo
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- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
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- H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
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Abstract
Description
도2A는 종래 전자 빔 노출 장치의 상세도이다.
도2B는 본 발명에 따른 전자 빔 노출 장치의 상세도이다.
도3은 구면의 외부 표면을 구비한 전자 소스를 도시한 것이다.
도3A는 공간 전하 영역을 구비한 소스를 도시한 것이다.
도4는 빔릿들로부터 시작하는 전자 빔 노출 장치의 일 실시예를 도시한 것이다.
도5A, 5B는 본 발명의 주사 편향 어레이들의 실시예를 도시한 것이다.
도6A, 6B는 본 발명의 주사 경로(trajectory)들을 도시한 것이다.
도7A-7D는 변조 타이밍의 조절을 도시한 것이다.
8A, 8B는 변조 타이밍 조절의 효과들을 도시한 것이다.
Claims (32)
- 표적의 표면상에 패턴을 전사하기 위한 마스크리스(maskless) 리소그래피 시스템에 있어서,
전자 빔을 발생하는 전자 빔 발생기와;
상기 전자 빔 발생기에 의해 발생된 전자 빔으로부터 복수의 평행한 빔릿들을 발생하는 조명 광 시스템(illumination optical system) 및 빔 분열기(beam splitter)와;
표적 상에 상기 빔 분열기에 의해 발생된 빔릿들을 투사(project)하고, 개별 빔릿들을 서로 떨어져 있도록 유지시키면서 상기 개별 빔릿들의 단면적을 감소시키는 집속 전자 광 시스템(focusing electron optical system)을 포함하고,
상기 집속 전자 광 시스템은, 감소된 단면적을 갖는 상기 빔릿들을 상기 타겟 상에 상기 빔릿들이 투사될 때까지 서로 떨어져 있는 채로 유지시키도록 구성되는 것인 마스크리스 리소그래피 시스템. - 제1항에 있어서,
상기 마스크리스 리소그래피 시스템은 상기 빔 분열기의 하류에 상기 복수의 빔릿들 내의 개별 빔릿들의 초점을 맞추는 집광 렌즈 어레이(condensor lens array)를 더 포함하는 것인, 마스크리스 리소그래피 시스템. - 청구항 3은(는) 설정등록료 납부시 포기되었습니다.제2항에 있어서,
상기 개별 빔릿들은 0.1 내지 1 ㎛ 범위의 직경에 초점이 맞추어지는 것인, 마스크리스 리소그래피 시스템. - 제2항에 있어서,
상기 집광 렌즈 어레이는 홀을 갖는 2개의 정렬된 플레이트를 포함하는 것인, 마스크리스 리소그래피 시스템. - 청구항 5은(는) 설정등록료 납부시 포기되었습니다.제4항에 있어서,
상기 플레이트의 두께는 10 내지 500 ㎛ 범위 내인 것인, 마스크리스 리소그래피 시스템. - 제4항에 있어서,
상기 집광 렌즈 어레이는 50 내지 200 ㎛ 범위 내의 직경과 50 내지 500 ㎛ 범위 내의 피치의 홀을 갖는 플레이트를 포함하는 것인, 마스크리스 리소그래피 시스템. - 청구항 7은(는) 설정등록료 납부시 포기되었습니다.제4항에 있어서,
상기 마스크리스 리소그래피 시스템은 상기 플레이트를 지지하기 위한 절연체를 더 포함하는 것인, 마스크리스 리소그래피 시스템. - 제1항에 있어서,
개별 빔릿들을 변조하는 변조 어레이를 더 포함하고, 상기 변조 어레이는 상기 빔 분열기와 상기 집속 전자 광 시스템 사이에 위치되며, 빔릿 소거기 어레이(beamlet blanker array)와 빔릿 스톱 어레이(beamlet stop array)를 포함하고, 상기 빔릿 스톱 어레이는 전자 빔릿 경로를 따라 상기 빔릿 소거기 어레이의 뒤에 위치되는 것인, 마스크리스 리소그래피 시스템. - 삭제
- 제8항에 있어서,
상기 빔릿 소거기 어레이에서의 빔 직경은 0.1 내지 5 ㎛ 범위 내에 있는 것인, 마스크리스 리소그래피 시스템. - 청구항 11은(는) 설정등록료 납부시 포기되었습니다.제8항에 있어서,
상기 빔릿 소거기 어레이에서의 횡단선 에너지(transversal energy)는 1 내지 20 meV 범위 내에 있는 것인, 마스크리스 리소그래피 시스템. - 제8항에 있어서,
상기 빔릿 소거기 어레이는 정전기적 편향기(electrostatic deflector)들의 어레이를 포함하며, 각각의 정전기적 편향기는 접지 연결된 제1 전극과 제어 데이터를 수신하는 회로에 연결된 제2 전극을 포함하는 것인, 마스크리스 리소그래피 시스템. - 제12항에 있어서,
상기 각각의 정전기적 편향기는 개별적으로 제어되는 것인, 마스크리스 리소그래피 시스템. - 청구항 14은(는) 설정등록료 납부시 포기되었습니다.제8항에 있어서,
상기 빔릿 소거기 어레이는 복수의 빔릿들의 정전기적 초점면에 위치되는 것인, 마스크리스 리소그래피 시스템. - 청구항 15은(는) 설정등록료 납부시 포기되었습니다.제14항에 있어서,
상기 빔릿 스톱 어레이는 복수의 빔릿들의 정전기적 초점면 외부에 위치되는 것인, 마스크리스 리소그래피 시스템. - 청구항 16은(는) 설정등록료 납부시 포기되었습니다.제1항에 있어서,
상기 집속 전자 광 시스템은 정전기적 렌즈들의 어레이를 포함하고, 상기 정전기적 렌즈들의 어레이는 상기 복수의 빔릿들 내의 각각의 개별 빔릿을 대응하는 정전기적 렌즈를 이용해 초점을 맞추는 것인, 마스크리스 리소그래피 시스템. - 청구항 17은(는) 설정등록료 납부시 포기되었습니다.제16항에 있어서,
상기 정전기적 렌즈들의 어레이는 둘 이상의 렌즈 플레이트를 포함하며,각각의 플레이트는 10 내지 500 ㎛ 범위 내의 두께를 갖는 것인, 마스크리스 리소그래피 시스템. - 청구항 18은(는) 설정등록료 납부시 포기되었습니다.제16항에 있어서,
상기 정전기적 렌즈들의 어레이는 둘 이상의 렌즈 플레이트를 포함하며, 연속하는 렌즈 플레이트들 사이의 간격은 50 내지 800 ㎛ 범위 내에 있는 것인, 마스크리스 리소그래피 시스템. - 제16항에 있어서,
상기 정전기적 렌즈들의 어레이는 셋 이상의 렌즈 플레이트를 포함하며, 연속하는 렌즈 플레이트들 사이의 간격은 플레이트에 따라 상이한 것인, 마스크리스 리소그래피 시스템. - 제1항에 있어서,
상기 집속 전자 광 시스템은 자기(magnetic) 타입의 렌즈 어레이를 포함하는 것인, 마스크리스 리소그래피 시스템. - 제8항에 있어서,
상기 집속 전자 광 시스템은 자기 타입의 렌즈 어레이 및 정전기적 렌즈들의 어레이를 포함하며, 상기 자기 타입의 렌즈 어레이는 상기 빔릿 스톱 어레이와 상기 정전기적 렌즈들의 어레이 사이에 위치되는 것인, 마스크리스 리소그래피 시스템. - 청구항 22은(는) 설정등록료 납부시 포기되었습니다.제20항에 있어서,
상기 자기 타입의 렌즈 어레이는 투사 시스템의 집속 특성을 향상시키기 위해 포함되는 것인, 마스크리스 리소그래피 시스템. - 청구항 23은(는) 설정등록료 납부시 포기되었습니다.제1항에 있어서,
상기 빔 분열기는 공간 필터를 포함하는 것인, 마스크리스 리소그래피 시스템. - 제23항에 있어서,
상기 공간 필터는 간극 어레이(aperture array)를 포함하는 것인, 마스크리스 리소그래피 시스템. - 제24항에 있어서,
상기 간극 어레이의 간극들은 육각형 구조로 정렬되는 것인, 마스크리스 리소그래피 시스템. - 청구항 26은(는) 설정등록료 납부시 포기되었습니다.제24항에 있어서,
상기 간극 어레이의 각각의 간극은 사용 중일 때 상기 간극을 통하여 투과되는 빔릿의 전류 밀도에 반비례하는 면적을 갖는 것인, 마스크리스 리소그래피 시스템. - 청구항 27은(는) 설정등록료 납부시 포기되었습니다.제1항에 있어서,
상기 빔 분열기는 정전기적 4중극(quadrupole) 렌즈 어레이를 포함하는 것인, 마스크리스 리소그래피 시스템. - 제1항에 있어서,
상기 빔 분열기는 복수의 빔릿들 또는 전자 빔의 경로를 따라 직렬인 다수의 간극 어레이들을 포함하며, 상기 간극 어레이들은 상호 정렬된 간극들을 갖고, 전자 빔 발생기로부터 표적까지의 경로를 따라서 각각의 후속 간극 어레이는 이전 어레이의 대응하는 간극들보다 더 작은 간극들을 갖는 것인, 마스크리스 리소그래피 시스템. - 제1항에 있어서,
전자 빔 발생기로부터 표적까지의 빔릿 경로를 따라서, 정전기적 렌즈 어레이가 상기 빔 분열기 바로 뒤에 위치되는 것인, 마스크리스 리소그래피 시스템. - 청구항 30은(는) 설정등록료 납부시 포기되었습니다.제1항에 있어서, 상기 마스크리스 리소그래피 시스템은,
상기 복수의 빔릿들의 개별 빔릿들을 제어 가능하게 편향시키는 빔릿 소거기 어레이와;
편향된 빔릿들을 차단하고 편향되지 않은 빔릿들을 통과시키는 빔릿 스톱 어레이를 더 포함하는 것인, 마스크리스 리소그래피 시스템. - 청구항 31은(는) 설정등록료 납부시 포기되었습니다.제30항에 있어서,
상기 빔릿 소거기 어레이는 상기 복수의 빔릿들의 초점을 맞추는 정전기적 렌즈 어레이의 초점면에 위치되는 것인, 마스크리스 리소그래피 시스템. - 제1항에 있어서,
상기 빔릿들은 서로 평행하게 유지되는 것인, 마스크리스 리소그래피 시스템.
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