KR102029538B1 - 성막 장치 및 성막 방법 - Google Patents
성막 장치 및 성막 방법 Download PDFInfo
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Abstract
ALD법에 의해 웨이퍼(W)에 TiN막을 성막하는 성막 장치(100)는, 웨이퍼(W)를 수용하는 챔버(1)와, 챔버(1) 내에, TiCl4 가스로 이루어진 티탄 원료 가스와, NH3 가스로 이루어진 질화 가스와, 퍼지 가스를 공급하는 가스 공급 기구(5)와, 챔버(1) 내를 배기하는 배기 기구(42)와, TiCl4 가스와 NH3 가스가 웨이퍼(W)에 교대로 공급되도록 가스 공급 기구(5)를 제어하는 제어부(6)를 구비하고, 가스 공급 기구(5)는, NH3 가스를 가열하여 상태를 변화시키는 NH3 가스 가열 유닛(65)을 가지며, NH3 가스 가열 유닛(65)에 의해 상태가 변화된 NH3 가스를 챔버(1) 내에 공급한다.
Description
도 2는 도 1의 성막 장치의 가스 공급 시퀀스를 나타내는 도면이다.
도 3은 막 중의 Cl의 제거가 충분히 행해지지 않은 경우의 XRF에 의한 TiN막의 막두께와, XPS에 의한 막 중의 Cl 농도(Cl 2p/Ti 2p)의 관계를 나타내는 도면이다.
도 4는 NH3의 열평형을 나타내는 도면이다.
도 5는 NH3 가스를 가열한 경우와 가열하지 않은 경우에 있어서의, NH3 가스의 유량과 비저항의 관계를 나타내는 도면이다.
도 6은 NH3 가스를 가열한 경우와 가열하지 않은 경우에 있어서의, XRF에 의한 막두께와 XPS에 의한 막 중의 Cl 농도(Cl 2p/Ti 2p)의 관계를 나타내는 도면이다.
2 : 서셉터
3 : 가스 도입부
4 : 배기부
5 : 가스 공급 기구
6 : 제어부
31 : 가스 도입 블록
32 : 본체부
33 : 샤워 플레이트
51 : TiCl4 가스 공급원
52 : NH3 가스 공급원
53 : 제1 N2 가스 공급원
54 : 제2 N2 가스 공급원
61∼64 : 가스 공급 배관
65 : NH3 가스 가열 유닛
71b, 72b, 73b, 74b : 개폐 밸브
100 : 성막 장치
W : 반도체 웨이퍼(피처리 기판)
Claims (15)
- ALD법에 의해 피처리 기판에 TiN막을 성막하는 성막 장치에 있어서,
피처리 기판을 수용하는 챔버와,
상기 챔버 내에, 염소를 포함하는 티탄 화합물 가스로 이루어진 티탄(Ti) 원료 가스와, 질소 및 수소를 포함하는 화합물 가스로 이루어진 질화 가스와, 퍼지 가스를 공급하는 가스 공급 기구와,
상기 챔버 내를 배기하는 배기 기구와,
상기 티탄 원료 가스와 상기 질화 가스가 상기 피처리 기판에 교대로 공급되도록 상기 가스 공급 기구를 제어하는 제어부
를 포함하고,
상기 가스 공급 기구는, 상기 질화 가스를 가열하여 상태를 변화시키는 질화 가스 가열 유닛을 가지며, 상기 질화 가스 가열 유닛에 의해 상태가 변화된 상기 질화 가스를 상기 챔버 내에 공급하고,
상기 질화 가스 가열 유닛은, 상기 질화 가스를 100℃ 이상으로 가열하고,
상기 피처리 기판을 가열하는 가열 기구를 더 포함하고, 상기 제어부는, 상기 피처리 기판의 온도가 400∼550℃의 범위 내의 온도가 되도록 상기 가열 기구를 제어하고,
상기 질화 가스 가열 유닛에는 퍼지 가스가 항상 공급되어 가열되고, 간헐적으로 상기 질화 가스가 공급되어 퍼지 가스와 함께 가열되는 것을 특징으로 하는 성막 장치. - 제1항에 있어서,
상기 티탄 원료 가스는 TiCl4 가스인 것을 특징으로 하는 성막 장치. - 제1항 또는 제2항에 있어서,
상기 질화 가스는 NH3 가스인 것을 특징으로 하는 성막 장치. - 삭제
- 제1항 또는 제2항에 있어서,
상기 질화 가스 가열 유닛은, 내부에 굴곡된 가스 유로를 가지며, 히터가 내장되어 있고, 상기 히터를 미리 정해진 설정 온도로 가열함으로써, 가스 유로를 통류하는 질화 가스를 열교환에 의해 가열하는 것을 특징으로 하는 성막 장치. - 제1항 또는 제2항에 있어서,
상기 가스 공급 기구는, 상기 Ti 원료 가스를 공급하는 Ti 원료 가스 공급원과, 상기 질화 가스를 공급하는 질화 가스 공급원과, 상기 퍼지 가스를 공급하는 제1 퍼지 가스 공급원 및 제2 퍼지 가스 공급원과, 상기 Ti 원료 가스 공급원에 접속되고, 상기 Ti 원료 가스를 상기 챔버에 공급하기 위한 제1 가스 공급 배관과, 상기 질화 가스 공급원에 접속되고, 상기 질화 가스를 챔버에 공급하기 위한 제2 가스 공급 배관과, 상기 제1 퍼지 가스 공급원에 접속되고, 상기 제1 가스 공급 배관에 합류하는 제3 가스 공급 배관과, 상기 제2 퍼지 가스 공급원에 접속되고, 상기 제2 가스 공급 배관에 합류하는 제4 가스 공급 배관과, 상기 제1∼제4 가스 공급 배관에 각각 설치된 개폐 밸브를 가지며,
상기 질화 가스 가열 유닛은, 상기 제2 가스 공급 배관의 상기 제4 가스 공급 배관이 합류하는 부분보다 하류측에 설치되어 있고,
상기 제어부는, 성막중에, 상기 제3 가스 공급 배관 및 상기 제4 가스 공급 배관의 상기 개폐 밸브를 개방하여 항상 퍼지 가스를 흐르게 하고, 상기 제1 가스 공급 배관 및 상기 제2 가스 공급 배관의 상기 개폐 밸브를 교대로 간헐적으로 개폐하고,
상기 질화 가스 가열 유닛에 상기 퍼지 가스가 항상 공급되어 가열되고, 또한 상기 퍼지 가스와 함께 간헐적으로 상기 질화 가스가 공급되어 상기 질화 가스가 상기 퍼지 가스와 함께 가열되는 것을 특징으로 하는 성막 장치. - 삭제
- 피처리 기판이 수용되고, 감압 하에 유지된 챔버 내에, 염소를 포함하는 티탄 화합물 가스로 이루어진 티탄(Ti) 원료 가스와, 질소 및 수소를 포함하는 화합물 가스로 이루어진 질화 가스를, 교대로 간헐적으로 공급하고, ALD법에 의해 피처리 기판에 TiN막을 성막하는 성막 방법에 있어서,
상기 질화 가스를 가열하여 상태 변화시키고, 상태 변화된 상기 질화 가스를 상기 챔버 내에 공급하고,
상기 질화 가스를 100℃ 이상으로 가열하고,
상기 피처리 기판의 온도를 400∼550℃의 범위 내의 온도로 제어하고,
상기 티탄 원료 가스의 공급과 상기 질화 가스의 공급 사이에, 상기 챔버 내에 퍼지 가스를 공급하여 상기 챔버 내를 퍼지하고,
성막중에, 상기 챔버 내에 상기 퍼지 가스를 항상 공급하고, 상기 퍼지 가스와 함께 상기 Ti 원료 가스 및 상기 질화 가스를 교대로 간헐적으로 공급하고,
상기 질화 가스와 상기 퍼지 가스가 합류하는 배관에 있어서, 상기 퍼지 가스를 항상 가열하고, 상기 질화 가스가 공급되었을 때에 상기 질화 가스를 상기 퍼지 가스와 함께 가열하는 것을 특징으로 하는 성막 방법. - 제8항에 있어서,
상기 티탄 원료 가스는 TiCl4 가스인 것을 특징으로 하는 성막 방법. - 제8항 또는 제9항에 있어서,
상기 질화 가스는 NH3 가스인 것을 특징으로 하는 성막 방법. - 삭제
- 삭제
- 삭제
- 삭제
- 컴퓨터 상에서 동작하며, 성막 장치를 제어하기 위한 프로그램이 기억된 기억 매체에 있어서,
상기 프로그램은, 실행시에 제8항 또는 제9항에 기재된 성막 방법이 행해지도록, 컴퓨터에 상기 성막 장치를 제어시키는 것을 특징으로 하는 기억 매체.
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