超平的单晶六角化,用于晶圆尺度集成的2D兼容的高-κ金属门
Yani Wang1,2, Chao Zhao3,4,5, Xin Gao1,2,6
1Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, China.
Nature materials
|August 12, 2024
概括
晶圆尺度超平的单晶六角化 (hBN) 使用一种新的表轴方法生长. 这一突破使得下一代二维电子产品的先进介电层可以无损地集成.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 固态物理 固态物理
背景情况:
- 六角化 (hBN) 对于先进电子中的介电集成至关重要.
- 实现晶圆尺度超平的hBN薄膜仍然是一个重大挑战.
- 现有的方法难以产生大面积,无缺陷的hBN.
研究的目的:
- 开发一种培养晶圆尺度超平单晶hBN的方法.
- 为了利用这个hBN作为2D材料上的高-κ介电物的保护层.
- 为了证明未来电子设备的性能好处.
主要方法:
- 在Cu$_{0.8}$Ni$_{0.2}${111) /蓝宝石晶片上hBN的长轴增长.
- 使用强大的hBN-Cu$_{0.8}$Ni$_{0.2}${111) 合,以防止纹.
- 在2D材料上集成晶片尺度超薄高κ介电材料 (hBN/HfO$_{2}$).
主要成果:
- 在晶圆尺度上成功生长了4英寸的超平单晶hBN.
- 实现了平行hBN域的无拼接,抑制了纹.
- 已证明的hBN/HfO$_{2}$电介质具有超低的泄漏率 (2.36 × 10$^{-6}$ A cm$^{-2}$) 和0.52纳米相当的氧化物厚度.
- 满足设备和系统目标的国际路线图.
结论:
- 开发了一种可扩展的超平单晶hBN合成方法.
- 确立了hBN作为一种有效的保护层,用于无损的介电集成.
- 为先进的2D材料和未来的2D电子设备铺平了道路.
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