KR20120024740A - Ge-Sb-Te막의 성막 방법 및 기억 매체 - Google Patents
Ge-Sb-Te막의 성막 방법 및 기억 매체 Download PDFInfo
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Abstract
Description
도 2는 본 발명의 성막 방법을 설명하기 위한 순서도이다.
도 3은 실험 1에 의해 얻어진 막의 표면 상태를 나타낸 주사형 전자 현미경 사진이다.
도 4는 실험 2에 의해 얻어진 막의 표면 상태를 나타낸 주사형 전자 현미경 사진이다.
도 5는 실험 3에 의해 얻어진 막의 표면 상태를 나타낸 주사형 전자 현미경 사진이다.
도 6은 실험 4에 의해 얻어진 막의 표면 상태를 나타낸 주사형 전자 현미경 사진이다.
도 7은 실험 5에서 제 1 단계의 Ge / Sb의 조성비를 변화시킨 경우의 막의 표면 상태를 나타낸 주사형 전자 현미경 사진이다.
Claims (6)
- 기체 상태의 Ge 원료와 기체 상태의 Sb 원료와 기체 상태의 Te 원료를 이용하여 CVD에 의해 기판 상에 Ge2Sb2Te5가 되는 Ge-Sb-Te막을 성막하는 Ge-Sb-Te막의 성막 방법으로서,
처리 용기 내에 기판을 배치하는 공정과,
기체 상태의 Ge 원료 및 기체 상태의 Sb 원료, 또는 이들에 추가로 Ge2Sb2Te5가 형성되지 않을 정도의 소량의 기체 상태의 Te 원료를 상기 처리 용기 내로 도입하여 기판 상에 제 1 단계의 성막을 행하는 공정과,
기체 상태의 Sb 원료 및 기체 상태의 Te 원료, 또는 이들에 추가로 Ge2Sb2Te5가 형성되지 않을 정도의 소량의 기체 상태의 Ge 원료를 상기 처리 용기 내로 도입하여 상기 제 1 단계의 성막에 의해 얻어진 막 상에 제 2 단계의 성막을 행하는 공정을 가지며,
상기 제 1 단계의 성막에 의해 얻어진 막과 상기 제 2 단계의 성막에 의해 얻어진 막에 의해 상기 Ge-Sb-Te막이 얻어지는 Ge-Sb-Te막의 성막 방법. - 제 1 항에 있어서,
상기 제 1 단계의 성막에서 기체 상태의 Te 원료를 도입하는 경우에, 얻어진 막의 Te의 함유량이 10 at% 미만이 될 정도의 유량으로 하는 Ge-Sb-Te막의 성막 방법. - 제 1 항에 있어서,
상기 제 1 단계의 성막에서, 얻어진 막의 조성비 Ge / Sb가 원자수비로 50 / 50 ~ 70 / 30이 되거나, 또는 Ge 원료의 유량을 x(mL / min(sccm)), Sb 원료의 캐리어 Ar의 유량을 y(mL / min(sccm))로 했을 때, y / x가 0.01 ~ 0.1이 되도록 기체 상태의 Ge 원료 및 기체 상태의 Sb 원료를 도입하는 Ge-Sb-Te막의 성막 방법. - 제 1 항에 있어서,
상기 제 2 단계의 성막은, 상기 제 1 단계의 성막과 상기 제 2 단계의 성막으로 안정적으로 Ge2Sb2Te5가 얻어지는 조성이 되는 유량비로 기체 상태의 Sb 원료 및 기체 상태의 Te 원료를 공급하는 Ge-Sb-Te막의 성막 방법. - 제 1 항에 있어서,
상기 Ge 원료, 상기 Sb 원료 및 상기 Te 원료는 모두 알킬기를 포함하는 화합물인 Ge-Sb-Te막의 성막 방법. - 컴퓨터 상에서 동작하며 성막 장치를 제어하는 프로그램이 기억된 기억 매체로서,
상기 프로그램은, 실행 시에 기체 상태의 Ge 원료와 기체 상태의 Sb 원료와 기체 상태의 Te 원료를 이용하여 CVD에 의해 기판 상에 Ge2Sb2Te5가 되는 Ge-Sb-Te막을 성막하는 Ge-Sb-Te막의 성막 방법으로서, 처리 용기 내에 기판을 배치하는 공정과, 기체 상태의 Ge 원료 및 기체 상태의 Sb 원료, 또는 이들에 추가로 Ge2Sb2Te5가 형성되지 않을 정도의 소량의 기체 상태의 Te 원료를 상기 처리 용기 내로 도입하여 기판 상에 제 1 단계의 성막을 행하는 공정과, 기체 상태의 Sb 원료 및 기체 상태의 Te 원료, 또는 이들에 추가로 Ge2Sb2Te5가 형성되지 않을 정도의 소량의 기체 상태의 Ge 원료를 상기 처리 용기 내로 도입하여 상기 제 1 단계의 성막에 의해 얻어진 막 상에 제 2 단계의 성막을 행하는 공정을 가지며, 상기 제 1 단계의 성막에 의해 얻어진 막과 상기 제 2 단계의 성막에 의해 얻어진 막에 의해 상기 Ge-Sb-Te막이 얻어지는 Ge-Sb-Te막의 성막 방법이 행해지도록 컴퓨터에 상기 성막 장치를 제어시키는 기억 매체.
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