KR20210035553A - 도메인 스위칭 소자 및 그 제조방법 - Google Patents
도메인 스위칭 소자 및 그 제조방법 Download PDFInfo
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Abstract
Description
도 2는 비교예에 따른 도메인 스위칭 소자의 개략적인 구조를 보이는 단면도이다.
도 3a 및 도 3b는 각각 비교예에 따른 도메인 스위칭 소자에 채용되는 강유전성 물질의 전하와 에너지 간의 관계 및 전기장과 분극 간의 관계를 개념적으로 보이는 그래프이다.
도 4a 및 도 4b는 실시예에 따른 도메인 스위칭 소자에 채용되는 반강유전성 물질의 전하와 에너지 간의 관계 및 전기장과 분극 간의 관계를 개념적으로 보이는 그래프이다.
도 5 및 도 6은 HfZrO가 인접 물질층과의 계면 스트레인 관계에 의해 각각 강유전성, 반강유전성을 나타낼 수 있음을 실험적으로 확인한 그래프이다.
도 7은 다른 실시예에 따른 도메인 스위칭 소자의 개략적인 구조를 보이는 단면도이다.
도 8a 내지 도 8g는 실시예에 따른 도메인 스위칭 소자 제조방법을 설명하는 도면들이다.
도 9는 실시예에 따른 전자 소자의 아키텍쳐(architecture)를 개략적으로 보여주는 개념도이다.
도 10은 다른 실시예에 따른 전자 소자의 아키텍쳐(architecture)를 개략적으로 보여주는 개념도이다.
110: 기판
120: 유전체층
130: 배리어층
140: 반강유전층
142: 도메인 스위칭층
CH: 채널 영역
SR: 소스
DR: 드레인
GA: 게이트 전극
Claims (23)
- 채널 영역;
상기 채널 영역에 연결된 소스 및 드레인;
상기 채널 영역과 이격되게 배치된 게이트 전극;
상기 채널 영역과 상기 게이트 전극 사이에 배치된 반강유전(anti-ferroelectric)층;
상기 게이트 전극과 상기 반강유전층 사이에, 상기 반강유전층과 접하게 배치된 전도층; 및
상기 반강유전층과 상기 채널 영역 사이에 배치된 배리어층;을 포함하는, 도메인 스위칭 소자. - 제1항에 있어서,
상기 반강유전층은 상기 전도층과 인접한 적어도 일부 영역이 결정화된, 도메인 스위칭 소자. - 제1항에 있어서,
상기 반강유전층은 상기 전도층과의 계면 영역에서 ZrO의 비율이 50% 이상인, 도메인 스위칭 소자. - 제1항에 있어서,
상기 전도층은 면저항이 1㏁/square 보다 작은 물질로 이루어지는, 도메인 스위칭 소자. - 제1항에 있어서,
상기 전도층의 열팽창계수는 상기 반강유전층의 열팽창계수보다 작은, 도메인 스위칭 소자. - 제5항에 있어서,
상기 전도층의 열팽창계수는 상기 Mo의 열팽창계수보다 큰, 도메인 스위칭 소자. - 제1항에 있어서,
상기 전도층은 질화 금속(metal nitride), 질산화 금속(metal oxynitride), RuO, MoO, 또는 WO을 포함하는, 도메인 스위칭 소자.. - 제1항에 있어서,
상기 배리어층은 상기 반강유전층의 항복 전압(breakdown voltage)보다 큰 항복 전압을 가지는, 도메인 스위칭 소자. - 제1항에 있어서,
상기 배리어층은 SiO, AlO, HfO, ZrO, LaO, YO, MgO 중 적어도 하나를 포함하거나, SiO, AlO, HfO, ZrO, LaO, YO, MgO 중 어느 하나에 도펀트가 도핑된 물질 또는 이차원 절연체(2D insulator)를 포함하는, 도메인 스위칭 소자. - 제1항에 있어서,
상기 배리어층과 상기 채널 요소 사이에 배치된 유전체층을 더 포함하는, 도메인 스위칭 소자. - 제10항에 있어서,
상기 유전체층은 상기 배리어층과 다른 물질로 이루어지는, 도메인 스위칭 소자. - 제10항에 있어서,
상기 배리어층의 유전 상수가 상기 유전체층의 유전 상수보다 큰, 도메인 스위칭 소자. - 제10항에 있어서,
상기 유전체층은 SiO, AlO, HfO, ZrO 또는 이차원 절연체(2D insulator)를 포함하는, 도메인 스위칭 소자. - 제1항에 있어서,
상기 반강유전층은 HfO, ZrO, SiO, AlO, CeO, YO 및 LaO 중 적어도 하나를 포함하는, 도메인 스위칭 소자. - 제14항에 있어서,
상기 반강유전층은 도펀트(dopant)를 더 포함하고,
상기 도펀트는 Si, Al, Zr, Y, La, Gd, Sr, Hf, Ce 중 적어도 하나를 포함하는 도메인 스위칭 소자. - 제1항에 있어서,
상기 채널 영역은 Si, Ge, SiGe, Ⅲ-Ⅴ족 반도체, 산화물 반도체, 질화물 반도체, 질산화물 반도체, 이차원 물질(2D material), 양자점(quantum dot), 전이 금속 디칼코게나이드(transition metal dichalcogenide) 및 유기 반도체 중 적어도 하나를 포함하는 도메인 스위칭 소자. - 채널 영역을 포함하는 기판을 마련하는 단계;
상기 채널 영역 상에 배리어층, 도메인 스위칭층 및 전도층을 포함하는 적층 구조를 형성하는 단계;
상기 적층 구조 상에 전극 물질층을 형성하는 단계; 및
상기 도메인 스위칭층에 반강유전성(anti-ferroelectricity)을 유도하는 단계;를 포함하는, 도메인 스위칭 소자 제조방법. - 제17항에 있어서,
상기 도메인 스위칭층은 HfO, ZrO, SiO, AlO, CeO, YO, LaO 중 적어도 하나를 포함하는, 도메인 스위칭 소자 제조방법. - 제17항에 있어서,
상기 전도층은 질화 금속(metal nitride), 질산화 금속(metal oxynitride), RuO, MoO, 또는 WO을 포함하는, 도메인 스위칭 소자 제조방법. - 제17항에 있어서,
상기 유도하는 단계는
상기 전도층과 인접한 상기 도메인 스위칭층의 적어도 일부 영역을 결정화하는 단계;를 포함하는, 도메인 스위칭 소자 제조방법. - 제17항에 있어서,
상기 유도하는 단계는
상기 전도층에 의해 상기 도메인 스위칭 층에 인장 응력(tensile stress)이 인가되게 하는 단계를 포함하는, 도메인 스위칭 소자 제조방법. - 제17항에 있어서,
상기 유도하는 단계는
상기 적층 구조를 열처리(annealing)하는 단계;를 포함하는, 도메인 스위칭 소자 제조방법. - 제19항에 있어서,
상기 열처리하는 단계는
상기 적층 구조를 형성하는 단계 후 상기 전극물질층을 형성하기 이전에 행해지거나, 및/또는,
상기 전극물질층을 형성하는 단계 이후에 행해지는, 도메인 스위칭 소자 제조방법.
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US17/026,665 US11527646B2 (en) | 2019-09-24 | 2020-09-21 | Domain switching devices and methods of manufacturing the same |
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CN202011013829.7A CN112635561A (zh) | 2019-09-24 | 2020-09-24 | 畴切换器件、制造其的方法及系统及制造电子装置的方法 |
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