JP7601366B2 - ドメインスイッチング素子及びその製造方法 - Google Patents
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Description
前記反強誘電層は、前記伝導層との界面領域において、ZrOの比率が50%以上でもある。
前記伝導層の熱膨脹係数は、前記反強誘電層の熱膨脹係数よりも小さい。
前記伝導層の熱膨脹係数は、Moの熱膨脹係数よりも大きくなる。
前記バリア層の誘電定数が前記誘電体層の誘電定数よりも大きくなる。
前記誘導する段階は、前記伝導層と隣接した前記ドメインスイッチング層の少なくとも一部領域を結晶化する段階を含んでもよい。
強誘電性の物質は、結晶化された物質構造において、単位セル(unit cell)内の電荷分布が、非中心対称(non-centrosymmetric)であり、自発的な電気双極子(electric dipole)、すなわち、自発分極(spontaneous polarization)を有する。強誘電性の物質は、外部電場がない状態においても、電気双極子による残留分極(remnant polarization)を有し、同時に、外部電場により、分極の方向がドメイン単位に反転(switching)されもする。
一方、反強誘電性物質の場合、そのようなヒステリシスがほとんど示されない。
図8Aを参照すれば、チャネル領域CHを含む基板110が設けられる。
図9を参照すれば、1つのチップ1000に、メモリユニット1010、ALU(arithmetic logic unit)1020及び制御ユニット1030が形成されうる。同一基板上に、メモリユニット1010、ALU 1020及び制御ユニット1030をモノリシック(monolithic)に集積し、チップ1000を形成することができる。ALU 1020及び制御ユニット1030それぞれは、前述の実施形態のうちいずれか一つによるドメインスイッチング素子100,101,102を含むロジックトランジスタを含んでもよい。例えば、該ロジックトランジスタは、反強誘電性を有し、実質的に非履歴挙動特性を有するドメインスイッチング層を含んでもよい。メモリユニット1010は、メモリ素子を含んでもよい。例えば、前記メモリ素子は、強誘電ドメインを含みながら、履歴挙動特性を有するドメイン層を含んでもよい。メモリユニット1010、ALU 1020及び制御ユニット1030は、オンチップ(on-chip)において、メタルラインで相互連結され、直接通信することができる。メモリユニット1010は、メインメモリ及びキャッシュメモリをいずれも含んでもよい。そのようなチップ1000は、オンチップメモリ処理ユニット(on-chip memory processing unit)と言える。チップ1000と連結された入出力素子2000がさらに具備されうる。
110 基板
120 誘電体層
130 バリア層
140 反強誘電層
142 ドメインスイッチング層
CH チャネル領域
DR ドレイン
GA ゲート電極
SR ソース
Claims (22)
- チャネル領域と、
前記チャネル領域に連結されたソース及びドレインと、
前記チャネル領域と離隔されるように配置されたゲート電極と、
前記チャネル領域と前記ゲート電極との間に配置された反強誘電層と、
前記ゲート電極と前記反強誘電層との間に、前記反強誘電層と接するように配置された伝導層と、
前記反強誘電層と前記チャネル領域との間に配置されたバリア層と、を含み、
前記伝導層の熱膨脹係数は、前記反強誘電層の熱膨脹係数より小さく、
前記反強誘電層は、前記反強誘電層に印加される引張り応力に基づいて反強誘電性を示す、ドメインスイッチング素子。 - 前記反強誘電層は、前記伝導層と隣接した少なくとも一部領域が結晶化された、請求項1に記載のドメインスイッチング素子。
- 前記反強誘電層は、前記伝導層との界面領域において、ZrOの比率が50%以上である、請求項1または2に記載のドメインスイッチング素子。
- 前記伝導層は、面抵抗が1MΩ/squareより小さい物質からなる、請求項1から3のいずれか一項に記載のドメインスイッチング素子。
- 前記伝導層の熱膨脹係数は、Moの熱膨脹係数より大きい、請求項1から4のいずれか一項に記載のドメインスイッチング素子。
- 前記伝導層は、窒化金属、酸窒化金属、RuO、MoOまたはWOを含む、請求項1から5のいずれか一項に記載のドメインスイッチング素子。
- 前記バリア層は、前記反強誘電層の降伏電圧より大きい降伏電圧を有する、請求項1から6のいずれか一項に記載のドメインスイッチング素子。
- 前記バリア層は、SiO、AlO、HfO、ZrO、LaO、YO、MgOのうち少なくとも一つを含むか、あるいはSiO、AlO、HfO、ZrO、LaO、YO、MgOのうちいずれか一つにドーパントがドーピングされた物質、または二次元絶縁体を含む、請求項1から7のいずれか一項に記載のドメインスイッチング素子。
- 前記バリア層と前記チャネル領域との間に配置された誘電体層をさらに含む、請求項1から8のいずれか一項に記載のドメインスイッチング素子。
- 前記誘電体層は、前記バリア層と異なる物質からなる、請求項9に記載のドメインスイッチング素子。
- 前記バリア層の誘電定数が前記誘電体層の誘電定数より大きい、請求項9または10に記載のドメインスイッチング素子。
- 前記誘電体層は、SiO、AlO、HfO、ZrO、または二次元絶縁体を含む、請求項9から11のいずれか一項に記載のドメインスイッチング素子。
- 前記反強誘電層は、HfO、ZrO、SiO、AlO、CeO、YO及びLaOのうち少なくとも一つを含む、請求項1から12のいずれか一項に記載のドメインスイッチング素子。
- 前記反強誘電層は、ドーパントをさらに含み、
前記ドーパントは、Si、Al、Zr、Y、La、Gd、Sr、Hf、Ceのうち少なくとも一つを含む、請求項13に記載のドメインスイッチング素子。 - 前記チャネル領域は、Si、Ge、SiGe、III-V族半導体、酸化物半導体、窒化物半導体、酸窒化物半導体、二次元物質、量子ドット、遷移金属ジカルコゲナイド及び有機半導体のうち少なくとも一つを含む、請求項1から14のいずれか一項に記載のドメインスイッチング素子。
- チャネル領域を含む基板を設ける段階と、
前記チャネル領域上に、バリア層、ドメインスイッチング層及び伝導層を含む積層構造を形成する段階と、
前記積層構造上に電極物質層を形成する段階と、
前記ドメインスイッチング層に反強誘電性を誘導する段階と、を含む、請求項1に記載のドメインスイッチング素子製造方法。 - 前記ドメインスイッチング層は、HfO、ZrO、SiO、AlO、CeO、YO、LaOのうち少なくとも一つを含む、請求項16に記載のドメインスイッチング素子製造方法。
- 前記伝導層は、窒化金属、酸窒化金属、RuO、MoOまたはWOを含む、請求項16または17に記載のドメインスイッチング素子製造方法。
- 前記誘導する段階は、
前記伝導層と隣接した前記ドメインスイッチング層の少なくとも一部領域を結晶化する段階を含む、請求項16から18のいずれか一項に記載のドメインスイッチング素子製造方法。 - 前記誘導する段階は、
前記伝導層により、前記ドメインスイッチング層に引張り応力が印加されるようにする段階を含む、請求項16から19のいずれか一項に記載のドメインスイッチング素子製造方法。 - 前記誘導する段階は、
前記積層構造を熱処理する段階を含む、請求項16から20のいずれか一項に記載のドメインスイッチング素子製造方法。 - 前記熱処理する段階は、
前記積層構造を形成する段階後、前記電極物質層を形成する以前に行われ、及び/または
前記電極物質層を形成する段階後に行われる、請求項21に記載のドメインスイッチング素子製造方法。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2019-0117483 | 2019-09-24 | ||
| KR1020190117483A KR20210035553A (ko) | 2019-09-24 | 2019-09-24 | 도메인 스위칭 소자 및 그 제조방법 |
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| Publication Number | Publication Date |
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| JP2021052184A JP2021052184A (ja) | 2021-04-01 |
| JP7601366B2 true JP7601366B2 (ja) | 2024-12-17 |
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| KR102815962B1 (ko) * | 2020-05-18 | 2025-06-04 | 에스케이하이닉스 주식회사 | 반도체 장치 |
| US12382670B2 (en) | 2020-11-04 | 2025-08-05 | Samsung Electronics Co., Ltd. | Thin film structure and semiconductor device comprising the same |
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| CN114628583A (zh) * | 2022-02-25 | 2022-06-14 | 中国科学院微电子研究所 | 铁电存储器件及其制造方法 |
| KR102721720B1 (ko) * | 2022-07-18 | 2024-10-24 | 삼성전자주식회사 | 반도체 소자 및 이를 포함하는 전자 장치 |
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| US12224346B2 (en) | 2025-02-11 |
| US20230100991A1 (en) | 2023-03-30 |
| CN112635561A (zh) | 2021-04-09 |
| KR20210035553A (ko) | 2021-04-01 |
| JP2021052184A (ja) | 2021-04-01 |
| EP3799131A1 (en) | 2021-03-31 |
| US11824119B2 (en) | 2023-11-21 |
| US20240038890A1 (en) | 2024-02-01 |
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| US20210091227A1 (en) | 2021-03-25 |
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