KR102768697B1 - 플라즈마 프로세싱을 위한 이온 바이어스 전압의 공간 및 시간 제어 - Google Patents
플라즈마 프로세싱을 위한 이온 바이어스 전압의 공간 및 시간 제어 Download PDFInfo
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Abstract
Description
도 2 는 복수의 바이어스 구역들을 가진 다른 플라즈마 프로세싱 시스템을 도시한다;
도 3 은 복수의 바이어스 구역들을 가진 또 다른 플라즈마 프로세싱 시스템을 도시한다;
도 4 는 복수의 바이어스 구역들을 가진 다른 플라즈마 프로세싱 시스템을 도시한다;
도 5 는 본 명세서에서 개시된 실시형태들과 관련하여 트래버싱될 수도 있는 방법을 도시하는 플로우차트이다;
도 6 은 예시적인 제어 시스템의 양태들을 도시하는 다이어그램이다;
도 7 은 예시적인 바이어스 공급기의 양태들을 도시하는 다이어그램이다;
도 8 은 바이어스 공급기로부터 출력된 전압 파형의 그래프; 대응하는 시스 전압의 그래프; 및 대응하는 스위치-타이밍 다이어그램을 포함한다;
도 9 는 예시적인 바이어스 공급 파형 및 예시적인 전압 값들을 도시하는 그래프이다; 그리고
도 10a 는 도 7 에 도시된 바이어스 공급기에 전압들을 제공하기 위해 2 개의 전압 소스들을 사용하는 구현을 도시한다;
도 10b 는 도 7 에 도시된 바이어스 공급기에 전압들을 제공하기 위해 2 개의 전압 소스들을 사용하는 다른 구현을 도시한다;
도 10c 는 도 7 에 도시된 바이어스 공급기에 전압들을 제공하기 위해 2 개의 전압 소스들을 사용하는 또 다른 구현을 도시한다;
도 11a 는 도 7 에 도시된 바이어스 공급기에 전압들을 제공하기 위해 3 개의 전압 소스들을 사용하는 구현을 도시한다;
도 11b 는 도 7 에 도시된 바이어스 공급기에 전압들을 제공하기 위해 3 개의 전압 소스들을 사용하는 다른 구현을 도시한다;
도 11c 는 도 7 에 도시된 바이어스 공급기에 전압들을 제공하기 위해 3 개의 전압 소스들을 사용하는 또 다른 구현을 도시한다;
도 12 는 제어 시스템과 관련된 예시적인 바이어스 공급기의 양태들을 도시하는 다이어그램이다; 그리고
도 13 은 예시적인 컴퓨팅 디바이스를 도시하는 블록 다이어그램이다.
Claims (17)
- 플라즈마 프로세싱을 위한 시스템으로서,
플라즈마 프로세싱 챔버로서,
상기 플라즈마 프로세싱 챔버에 플라즈마를 제공하기 위한 소스;
제 1 전기 평면 및 제 2 전기 평면으로서, 상기 제 1 전기 평면 및 상기 제 2 전기 평면에 근접한 플라즈마 시스들을 제어하기 위해 상기 플라즈마 프로세싱 챔버 내에 배열된, 상기 제 1 전기 평면 및 상기 제 2 전기 평면; 및
기판을 지지하도록 배치된 척을 포함하는, 상기 플라즈마 프로세싱 챔버;
상기 제 1 전기 평면에 커플링된 제 1 바이어스 공급기;
상기 제 2 전기 평면에 커플링된 제 2 바이어스 공급기; 및
상기 기판의 에지에 대응하는 상기 제 1 전기 평면 또는 상기 제 2 전기 평면 중 적어도 하나의 전기 평면에 비대칭 주기적 전압 파형을 인가하도록 상기 제 1 바이어스 공급기 또는 상기 제 2 바이어스 공급기 중 적어도 하나의 바이어스 공급기를 제어하기 위한 제어기를 포함하는, 플라즈마 프로세싱 시스템. - 제 1 항에 있어서,
상기 소스는 원격 플라즈마 소스 또는 소스 생성기 중 적어도 하나를 포함하는, 플라즈마 프로세싱 시스템. - 제 1 항에 있어서,
상기 척은 상기 제 1 전기 평면 및 상기 제 2 전기 평면이 상기 기판에 대한 이온들의 궤적 또는 이온들의 에너지들의 공간 분포 중 적어도 하나에 영향을 주는 상기 플라즈마의 시스의 부분을 변경할 수 있도록 상기 시스와 상기 제 1 전기 평면 및 상기 제 2 전기 평면 사이에 배치되는, 플라즈마 프로세싱 시스템. - 제 3 항에 있어서,
상기 제 1 전기 평면 및 상기 제 2 전기 평면 중 하나의 전기 평면의 부분은 상기 기판의 에지에 대한 이온들의 궤적 또는 이온들의 에너지들의 공간 분포 중 적어도 하나에 영향을 주는 상기 시스의 부분을 변경하도록 상기 척의 에지를 따라 배치되는, 플라즈마 프로세싱 시스템. - 제 1 항에 있어서,
상기 제어기는,
상기 제 1 바이어스 공급기 및 상기 제 2 바이어스 공급기에 의해 인가되는 상기 비대칭 주기적 전압 파형의 적어도 하나의 특성을 측정하기 위한 모니터링 회로부;
상기 모니터링 회로부로부터 획득된 상기 비대칭 주기적 전압 파형의 측정된 상기 특성에 기초하여 상기 플라즈마 프로세싱 챔버 내의 환경의 특성을 결정하도록 구성된 챔버 분석 컴포넌트; 및
상기 제 1 전기 평면 및 상기 제 2 전기 평면에 근접한 상기 플라즈마 시스들을 제어하기 위해 상기 제 1 바이어스 공급기 및 상기 제 2 바이어스 공급기에 의해 인가된 상기 비대칭 주기적 전압 파형을 조정하기 위한 제어 회로부를 포함하는, 플라즈마 프로세싱 시스템. - 제 5 항에 있어서,
상기 챔버 분석 컴포넌트는 상기 제 1 전기 평면 및 상기 제 2 전기 평면에 근접한 상기 플라즈마 시스들의 시스 커패시턴스를 계산하도록 구성되고, 상기 제어 회로부는 상기 시스 커패시턴를 조정하기 위해 인가된 상기 비대칭 주기적 전압 파형의 상기 적어도 하나의 특성을 조정하도록 구성되는, 플라즈마 프로세싱 시스템. - 제 5 항에 있어서,
상기 제어기는 상기 제 1 바이어스 공급기 또는 상기 제 2 바이어스 공급기 내에 통합되는 통합 제어기 또는 상기 플라즈마 프로세싱 시스템의 다수의 컴포넌트들을 제어하는 시스템 제어기 중 적어도 하나를 포함하는, 플라즈마 프로세싱 시스템. - 제 1 항에 있어서,
상기 플라즈마 프로세싱 챔버 내에 배열된 플라즈마 전극을 포함하고, 상기 플라즈마 전극에 커플링된 소스 생성기를 포함하는, 플라즈마 프로세싱 시스템. - 제 2 항에 있어서,
상기 소스 생성기는 RF 생성기인, 플라즈마 프로세싱 시스템. - 플라즈마 프로세싱 챔버에서 기판을 프로세싱하기 위한 방법으로서,
상기 플라즈마 프로세싱 챔버에서 플라즈마를 생성하는 단계;
상기 플라즈마 프로세싱 챔버 내의 복수의 구역들의 각각에 대응하는 복수의 바이어스 공급기들로 비대칭 주기적 전압 파형을 인가하는 단계;
상기 기판의 에지에 대응하는 구역에 상기 비대칭 주기적 전압 파형들 중 적어도 하나의 비대칭 주기적 전압 파형을 인가하는 단계; 및
플라즈마 시스의 대응하는 부분들을 변경하기 위해 비대칭 주기적 전압 파형들의 하나 이상의 특성들을 조정하는 단계를 포함하는, 플라즈마 프로세싱 챔버에서 기판을 프로세싱하기 위한 방법. - 제 10 항에 있어서,
상기 플라즈마 프로세싱 챔버 내의 기판에 근접하여 위치된 복수의 구역들의 각각에 상기 비대칭 주기적 전압 파형을 인가하는 단계를 포함하는, 플라즈마 프로세싱 챔버에서 기판을 프로세싱하기 위한 방법. - 삭제
- 제 10 항에 있어서,
상기 기판의 상기 에지에 근접한 상기 플라즈마의 밀도를 억제하기 위해 상기 기판의 상기 에지에 대응하는 상기 구역에 상기 비대칭 주기적 전압 파형을 인가하는 단계를 포함하는, 플라즈마 프로세싱 챔버에서 기판을 프로세싱하기 위한 방법. - 제 10 항에 있어서,
적어도 하나의 소스 생성기 및 상기 바이어스 공급기들 중 하나의 바이어스 공급기를 공통 전극에 커플링하는 단계를 포함하는, 플라즈마 프로세싱 챔버에서 기판을 프로세싱하기 위한 방법. - 제 10 항에 있어서,
상기 플라즈마 프로세싱 챔버의 상부 플레이트에 근접한 플라즈마 시스의 대응하는 하나 이상의 부분들을 변경하기 위해 하나 이상의 상부 구역들에 대한 비대칭 주기적 전압 파형들을 조정하는 단계를 포함하는, 플라즈마 프로세싱 챔버에서 기판을 프로세싱하기 위한 방법. - 제 10 항에 있어서,
하나 이상의 상기 구역들에 하나 이상의 상기 바이어스 공급기들에 의해 인가되는 상기 비대칭 주기적 전압 파형의 특성을 측정하는 단계;
상기 비대칭 주기적 전압 파형의 측정된 상기 특성에 기초하여 상기 플라즈마 프로세싱 챔버 내의 환경의 특성을 계산하는 단계; 및
상기 하나 이상의 구역들에 근접한 플라즈마 시스들을 제어하기 위해 적어도 하나의 바이어스 공급기에 의해 인가된 상기 비대칭 주기적 전압 파형을 조정하는 단계를 포함하는, 플라즈마 프로세싱 챔버에서 기판을 프로세싱하기 위한 방법. - 플라즈마 프로세싱을 수행하도록, 프로세서에 의한 실행을 위해, 또는 필드 프로그래밍가능 게이트 어레이를 구성하기 위해, 저장된 명령들을 포함하는 비일시적 컴퓨터 판독가능 매체로서,
상기 명령들은,
플라즈마 프로세싱 챔버에서 플라즈마를 생성하기 위해 원격 플라즈마 소스 또는 소스 생성기 중 적어도 하나를 제어하고;
기판의 에지에 대응하는 구역에 비대칭 주기적 전압 파형들 중 적어도 하나의 비대칭 주기적 전압 파형을 인가하도록 복수의 바이어스 공급기들을 제어하고; 그리고
플라즈마 시스의 대응하는 부분들을 변경하기 위해 비대칭 주기적 전압 파형들의 하나 이상의 특성들을 조정하도록 상기 복수의 바이어스 공급기들 중 하나 이상을 제어하기 위한 명령들을 포함하는, 비일시적 컴퓨터 판독가능 매체.
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