KR102361907B1 - 성막 방법 및 기판 처리 시스템 - Google Patents
성막 방법 및 기판 처리 시스템 Download PDFInfo
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- KR102361907B1 KR102361907B1 KR1020190121915A KR20190121915A KR102361907B1 KR 102361907 B1 KR102361907 B1 KR 102361907B1 KR 1020190121915 A KR1020190121915 A KR 1020190121915A KR 20190121915 A KR20190121915 A KR 20190121915A KR 102361907 B1 KR102361907 B1 KR 102361907B1
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Abstract
본 개시의 일 형태에 따른 성막 방법은, 절연막을 표면에 갖는 오목부가 형성된 기판에 대해, 상기 오목부 내에 금속막을 메우는 성막 방법이며, 상기 오목부 내에 하지막을 콘포멀하게 형성하는 공정과, 상기 오목부의 내벽 상부의 상기 절연막의 표면을 노출시키고, 상기 오목부 내의 저부에 상기 하지막을 잔존시키도록 상기 하지막을 에칭하는 공정과, 상기 오목부 내의 저부에 잔존하는 상기 하지막 위에 금속막을 선택적으로 성장시키는 공정을 갖는다.
Description
도 2는 성막 방법의 일례를 나타내는 공정 단면도.
도 3은 기판 처리 시스템의 구성예를 나타내는 개략도.
도 4는 TiN막을 형성하는 장치의 구성예를 나타내는 도면,
도 5는 TiN막을 에칭하는 장치의 구성예를 나타내는 도면.
도 6은 텅스텐막을 형성하는 장치의 구성예를 나타내는 도면.
도 7은 루테늄막의 선택 성장의 실험 수순의 설명도.
도 8은 오목부 내의 저부에 존재하는 TiN막 위에 루테늄막을 선택적으로 성장시킨 상태를 나타내는 SEM 사진.
Claims (10)
- 절연막을 표면에 갖는 오목부가 형성된 기판에 대해, 상기 오목부 내에 금속막을 메우는 성막 방법이며,
상기 오목부 내에 상기 오목부의 내벽 상부에 있어서 인접하는 패턴이 접촉하지 않도록 하지막을 콘포멀하게 형성하는 공정과,
상기 오목부의 내벽 상부의 상기 절연막의 표면을 노출시키고, 상기 오목부 내의 저부에 상기 하지막을 잔존시키도록 상기 하지막을 에칭하는 공정과,
상기 오목부 내의 저부에 잔존하는 상기 하지막 위에 금속막을 선택적으로 성장시키는 공정
을 포함하고,
상기 하지막을 콘포멀하게 형성하는 공정은, 티타늄 함유 가스를 사용한 ALD법에 의해 행해지고,
상기 금속막이 선택적으로 성장되는 공정은, 상기 절연막에 대한 인큐베이션 타임보다도 상기 하지막에 대한 인큐베이션 타임이 짧은 가스를 공급함으로써 행해지고,
상기 금속막은 텅스텐 또는 루테늄인,
성막 방법. - 제1항에 있어서, 상기 하지막을 에칭하는 공정은, 공급 율속 상태에서 행해지는,
성막 방법. - 삭제
- 제1항 또는 제2항에 있어서, 상기 하지막을 콘포멀하게 형성하는 공정과, 상기 하지막을 에칭하는 공정과, 상기 금속막을 선택적으로 성장시키는 공정은, 동일한 처리 용기 내에서 연속하여 행해지는,
성막 방법. - 제1항 또는 제2항에 있어서, 상기 하지막을 콘포멀하게 형성하는 공정과, 상기 하지막을 에칭하는 공정과, 상기 금속막을 선택적으로 성장시키는 공정은, 진공 반송실을 통하여 접속된 별도의 처리 용기 내에서 행해지는,
성막 방법. - 삭제
- 제1항 또는 제2항에 있어서, 상기 하지막을 에칭하는 공정은, 할로겐 함유 가스를 사용한 에칭에 의해 행해지는,
성막 방법. - 제1항 또는 제2항에 있어서, 상기 금속막을 선택적으로 성장시키는 공정은, 텅스텐 함유 가스 또는 루테늄 함유 가스를 사용한 CVD법 또는 ALD법에 의해 행해지는,
성막 방법. - 절연막을 표면에 갖는 오목부가 형성된 기판에 대해, 상기 오목부 내에 금속막을 메우는 성막 방법을 실행하는 기판 처리 시스템이며,
감압 상태에서 기판을 반송 가능한 반송 기구를 내부에 갖는 진공 반송실과,
상기 진공 반송실에 접속된 제1 처리 장치, 제2 처리 장치 및 제3 처리 장치와,
제어부
를 포함하고,
상기 제어부는,
상기 반송 기구에 의해 상기 기판을 상기 제1 처리 장치로 반송하고, 상기 제1 처리 장치에 있어서 상기 오목부 내에 상기 오목부의 내벽 상부에 있어서 인접하는 패턴이 접촉하지 않도록 하지막을 콘포멀하게 형성하는 공정과,
상기 반송 기구에 의해 상기 기판을 상기 제1 처리 장치로부터 상기 진공 반송실을 통하여 상기 제2 처리 장치로 반송하고, 상기 오목부의 내벽 상부의 상기 절연막의 표면을 노출시키고, 상기 오목부 내의 저부에 상기 하지막을 잔존시키도록 상기 하지막을 에칭하는 공정과,
상기 반송 기구에 의해 상기 기판을 상기 제2 처리 장치로부터 상기 진공 반송실을 통하여 상기 제3 처리 장치로 반송하고, 상기 오목부 내의 저부에 잔존하는 상기 하지막 위에 금속막을 선택적으로 성장시키는 공정
을 이 순서로 실행하도록, 상기 진공 반송실, 상기 제1 처리 장치, 상기 제2 처리 장치 및 상기 제3 처리 장치를 제어하고,
상기 하지막을 콘포멀하게 형성하는 공정은, 티타늄 함유 가스를 사용한 ALD법에 의해 행해지고,
상기 금속막이 선택적으로 성장되는 공정은, 상기 절연막에 대한 인큐베이션 타임보다도 상기 하지막에 대한 인큐베이션 타임이 짧은 가스를 공급함으로써 행해지고,
상기 금속막은 텅스텐 또는 루테늄인,
기판 처리 시스템. - 절연막을 표면에 갖는 오목부가 형성된 기판에 대해, 상기 오목부 내에 금속막을 메우는 성막 방법을 실행하는 기판 처리 시스템이며,
처리 장치와,
제어부
를 포함하고,
상기 제어부는,
상기 처리 장치에 기판을 반송하고, 상기 처리 장치에 있어서,
상기 오목부 내에 상기 오목부의 내벽 상부에 있어서 인접하는 패턴이 접촉하지 않도록 하지막을 콘포멀하게 형성하는 공정과,
상기 오목부의 내벽 상부의 상기 절연막의 표면을 노출시키고, 상기 오목부 내의 저부에 상기 하지막을 잔존시키도록 상기 하지막을 에칭하는 공정과,
상기 오목부 내의 저부에 잔존하는 상기 하지막 위에 금속막을 선택적으로 성장시키는 공정
을 이 순서로 연속하여 실행하도록, 상기 처리 장치를 제어하고,
상기 하지막을 콘포멀하게 형성하는 공정은, 티타늄 함유 가스를 사용한 ALD법에 의해 행해지고,
상기 금속막이 선택적으로 성장되는 공정은, 상기 절연막에 대한 인큐베이션 타임보다도 상기 하지막에 대한 인큐베이션 타임이 짧은 가스를 공급함으로써 행해지고,
상기 금속막은 텅스텐 또는 루테늄인,
기판 처리 시스템.
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