KR101647008B1 - 웨이퍼에 대한 검사 프로세스를 생성하기 위한 방법들 및 시스템들 - Google Patents
웨이퍼에 대한 검사 프로세스를 생성하기 위한 방법들 및 시스템들 Download PDFInfo
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Abstract
Description
도 2는 웨이퍼에 대한 설계에서 피쳐의 중심으로부터의 거리의 함수로써 상이한 로컬 속성들의 값들을 도시하는 플롯이다.
도 3은 웨이퍼에 대한 검사 시스템을 생성하기 위한 컴퓨터-구현 방법을 수행하기 위한 컴퓨터에 의해 실행가능한 프로그램 명령들을 포함하는 컴퓨터-판독가능 매체의 일 실시예를 예시하는 블록도이다.
도 4는 웨이퍼 상에서 검사 프로세스를 생성 및 수행하도록 구성되는 일 실시예를 예시하는 블록도이다.
Claims (29)
- 웨이퍼(wafer)에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법으로서,
웨이퍼에 대한 설계 내에서의 상이한 위치들에서 적어도 한가지 타입의 오류(fault) 메커니즘을 야기할 수 있는 결함에 기초하여 상기 상이한 위치들에 대한 로컬 속성(local attribute)의 값을 개별적으로(separately) 결정하는 단계;
상기 로컬 속성의 값에 기초하여 상기 설계 내에서의 상기 상이한 위치들에 대응하는 상기 웨이퍼 상의 상이한 위치들에 대해 결함들이 보고될 감도(sensitivity)를 결정하는 단계; 및
결정된 감도에 기초하여 상기 웨이퍼에 대한 검사 프로세스를 생성하는 단계를 포함하고,
상기 검사 프로세스를 사용하여, 결함들은 상기 검사 프로세스 동안 상기 웨이퍼에 대해 생성되는 출력 내의 개별 출력 특성의 크기(magnitude)에 기초하여 검출되고, 상기 결함들의 사이즈(size)에 기초하여서는 검출되지 않는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 로컬 속성의 값은 상기 상이한 위치들에서 적어도 한가지 타입의 오류 메커니즘을 야기할 수 있는 상기 결함의 임계 반경(critical radius)인,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 로컬 속성의 값은 상기 상이한 위치들에서의 상기 설계의 하나 이상의 피쳐들, 상기 상이한 위치들에 대해 근접한 상기 설계의 하나 이상의 피쳐들, 또는 이들의 일부 조합 중 적어도 하나의 디멘젼(dimension)의 함수로써 결정되는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 로컬 속성의 값을 개별적으로 결정하는 단계는 상기 설계를 위한 설계 데이터를 사용하여 수행되는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 로컬 속성의 값을 개별적으로 결정하는 단계는 상기 상이한 위치들에서 상기 적어도 한가지 타입의 오류 메커니즘을 야기할 수 있는 결함 및 상기 검사 프로세스를 수행할 검사 시스템의 하나 이상의 파라미터들에 기초하여 수행되는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 상이한 위치들은 상기 설계의 전체에 걸쳐 있는(span),
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 로컬 속성의 값은 상기 감도에 대해 역 관계(inverse relationship)를 가지는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 결정된 감도는 상기 웨이퍼 상에서의 상기 상이한 위치들에서 결함들이 검출될 감도와는 상이한,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 감도는 상기 웨이퍼 상의 상기 상이한 위치들에서 상기 결함들이 검출되고, 상기 웨이퍼 상의 상기 상이한 위치들에 대해 보고될 감도인,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 감도는 상기 검사 프로세스 동안 상기 웨이퍼에 대해 생성되는 상기 출력 내의 상기 개별 출력 특성의 크기에 대한 감도인,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 설계 내에서의 상기 상이한 위치들의 함수로써 상기 로컬 속성의 값들의 맵을 생성하는 단계를 더 포함하고, 상기 감도를 결정하는 단계는 상기 맵을 사용하여 수행되는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 감도를 결정하는 단계는 상기 설계 내에서의 상기 상이한 위치들의 함수로써 상기 웨이퍼 상의 상기 상이한 위치들에 대해 상기 결함들이 보고될 감도들의 맵을 생성하는 단계를 포함하는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 감도를 결정하는 단계는 상기 로컬 속성의 값에 기초하여 상이한 그룹들에 상기 설계 내에 상기 상이한 위치들을 할당하는 단계를 포함하며, 이에 의해 적어도 유사한 잡음 통계치들을 가질 상기 설계 내에서의 상기 상이한 위치들에 대응하는 상기 웨이퍼 상의 상기 상이한 위치들이 동일한 그룹에 할당되는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 감도를 결정하는 단계는 상기 로컬 속성의 값에 기초하여 상이한 세그먼트들에 상기 설계 내에서의 상기 상이한 위치들을 할당하는 단계 및 상기 상이한 세그먼트들에 대한 잡음 통계치들을 개별적으로 추정하는 단계를 포함하고,
상기 잡음 통계치들은 상기 상이한 세그먼트들에 할당된 상기 설계 내의 상기 상이한 위치들에 대응하는 상기 웨이퍼 상의 상이한 위치들에서 상기 검사 프로세스 동안 생성될 출력에 대한 잡음 통계치들인,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 감도를 결정하는 단계는 상기 로컬 속성의 값에 기초하여 상이한 세그먼트들에 상기 설계 내에서의 상기 상이한 위치들을 할당하는 단계, 상기 상이한 세그먼트들에 대한 잡음 통계치들을 개별적으로 추정하는 단계, 및 상기 잡음 통계치들에 기초하여 상기 상이한 세그먼트들에 대한 상기 감도를 결정하는 단계를 포함하고,
상기 잡음 통계치들은 상기 상이한 세그먼트들에 할당된 상기 설계 내에서의 상기 상이한 위치들에 대응하는 상기 웨이퍼 상의 상기 상이한 위치들에서 상기 검사 프로세스 동안 생성될 상기 출력에 대한 잡음 통계치들인,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 감도를 결정하는 단계는 상기 로컬 속성의 값들의 전체 범위의 상이한 부분들을 상이한 세그먼트들에 할당하는 단계, 상기 상이한 세그먼트들에 할당된 상기 상이한 부분들 내의 상기 로컬 속성의 값들에 기초하여 상기 상이한 세그먼트들에 대한 상이한 감도들을 개별적으로 결정하는 단계, 및 상기 상이한 위치들에 대해 결정된 로컬 속성의 값들이 속하는 상기 상이한 부분들에 기초하여 상기 상이한 세그먼트들에 상기 설계 내에서의 상기 상이한 위치들을 개별적으로 할당하는 단계를 포함하는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 감도를 결정하는 단계는 상기 로컬 속성의 값들의 전체 범위의 상이한 부분들을 상이한 세그먼트들에 할당하는 단계, 상기 상이한 세그먼트들에 할당된 상기 상이한 부분들 내의 상기 로컬 속성의 값들에 기초하여 상기 상이한 세그먼트들에 대한 상이한 감도들을 개별적으로 결정하는 단계, 및 상기 상이한 위치들에 대한 상기 로컬 속성의 값에 기초하는 상기 설계 내의 상기 상이한 위치들, 상기 상이한 세그먼트들에 할당된 상기 로컬 속성의 값들의 상기 전체 범위의 상기 상이한 부분들, 및 상기 상이한 세그먼트들에 대해 결정된 상기 상이한 감도들의 함수로써 상기 웨이퍼 상의 상이한 위치들에 대해 상기 결함들이 보고될 감도들의 맵을 생성하는 단계를 포함하는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 검사 프로세스 동안 검사 시스템에 의해 상기 웨이퍼에 대해 생성된 출력에 기초하여 상기 웨이퍼 상의 상기 상이한 위치들에 대한 로컬 이미지 속성의 값을 개별적으로 결정하는 단계를 더 포함하고,
상기 감도를 결정하는 단계는 상기 이미지 속성 및 상기 로컬 속성의 값들에 기초하여 수행되는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 검사 프로세스 동안 검사 시스템에 의해 상기 웨이퍼에 대해 생성된 상기 출력에 기초하여 상기 웨이퍼 상의 상기 상이한 위치들에 대한 로컬 이미지 속성의 값을 개별적으로 결정하는 단계를 더 포함하고,
상기 감도를 결정하는 단계는 상기 로컬 속성의 값, 상기 로컬 이미지 속성의 값, 및 상기 검사 시스템의 좌표 부정확성에 기초하여 수행되는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 감도를 결정하는 단계는 상기 설계의 핫 스폿(hot spot)들에 관한 정보 및 상기 로컬 속성의 값에 기초하여 수행되는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 로컬 속성의 값은 상기 설계 내의 상이한 위치들이 상기 설계의 핫 스폿들인지의 여부를 표시하지 않고,
상기 감도를 결정하는 단계는 상기 설계에서 상기 핫 스폿들에 관한 정보에 기초하여 수행되지 않는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 웨이퍼 상에 인쇄된 설계는 상기 검사 프로세스를 수행하는 검사 시스템에 의해 결정(resolve)될 수 없는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 로컬 속성의 값을 개별적으로 결정하는 단계 및 상기 감도를 결정하는 단계는 결함들이 상기 검사 프로세스에서 상기 웨이퍼 상에서 검출되기 전에 수행되는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 로컬 속성의 값을 개별적으로 결정하는 단계 및 상기 감도를 결정하는 단계는 오프라인으로 수행되는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 삭제
- 제1항에 있어서,
상기 검사 프로세스를 사용하여, 상기 결함들은 상기 검사 프로세스 동안 상기 웨이퍼에 대해 생성되는 상기 출력 내의 상기 개별 출력 특성의 크기에 기초하여 보고되고, 상기 결함들의 사이즈에 기초하여서는 보고되지 않는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 제1항에 있어서,
상기 검사 프로세스는, 상기 설계 내에서의 상기 상이한 위치들에 대응하는 상기 웨이퍼 상의 상기 상이한 위치들에서 생성되는 상기 출력이 식별될 수 있도록, 설계 데이터 공간에서 상기 검사 프로세스 동안 검사 시스템에 의해 상기 웨이퍼에 대해 생성되는 상기 출력의 위치를 결정하는 단계를 포함하는,
웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법. - 웨이퍼에 대한 검사 프로세스를 생성하기 위한 컴퓨터-구현 방법을 수행하기 위해 컴퓨터 시스템상에서 실행가능한 프로그램 명령들을 포함하는 컴퓨터-판독가능한 매체로서, 상기 컴퓨터-구현 방법은,
웨이퍼에 대한 설계 내에서의 상이한 위치들에서 적어도 한가지 타입의 오류 메커니즘을 야기할 수 있는 결함에 기초하여 상기 상이한 위치들에 대한 로컬 속성의 값을 개별적으로 결정하는 단계;
상기 로컬 속성의 값에 기초하여 상기 설계 내에서의 상기 상이한 위치들에 대응하는 상기 웨이퍼 상의 상이한 위치들에 대해 결함들이 보고될 감도를 결정하는 단계; 및
결정된 감도에 기초하여 상기 웨이퍼에 대한 검사 프로세스를 생성하는 단계를 포함하고,
상기 검사 프로세스를 사용하여, 결함들은 상기 검사 프로세스 동안 상기 웨이퍼에 대해 생성되는 출력 내의 개별 출력 특성의 크기에 기초하여 검출되고, 상기 결함들의 사이즈에 기초하여서는 검출되지 않는,
컴퓨터-판독가능한 매체. - 웨이퍼에 대한 검사 프로세스를 생성 및 수행하도록 구성되는 시스템으로서,
컴퓨터 서브시스템; 및
검사 서브시스템을 포함하고,
상기 컴퓨터 서브시스템은,
상기 웨이퍼에 대한 설계 내에서의 상이한 위치들에서 적어도 한가지 타입의 오류 메커니즘을 야기할 수 있는 결함에 기초하여 상기 상이한 위치들에 대한 로컬 속성의 값을 개별적으로 결정하고;
상기 로컬 속성의 값에 기초하여 상기 설계 내에서의 상이한 위치들에 대응하는 상기 웨이퍼 상의 상이한 위치들에 대해 결함들이 보고될 감도를 결정하고; 그리고
결정된 감도에 기초하여 상기 웨이퍼에 대한 검사 프로세스를 생성하도록 구성되고,
상기 검사 서브시스템은 상기 웨이퍼 상에서 상기 검사 프로세스를 수행하도록 구성되며,
상기 검사 프로세스를 사용하여, 결함들은 상기 검사 프로세스 동안 상기 웨이퍼에 대해 생성되는 출력 내의 개별 출력 특성의 크기에 기초하여 검출되고, 상기 결함들의 사이즈에 기초하여서는 검출되지 않는,
웨이퍼에 대한 검사 프로세스를 생성 및 수행하도록 구성되는 시스템.
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