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Saraswati Behera¹

¹Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, Gothenburg, Sweden. beheras@chalmers.se.

Scientific reports

|June 30, 2023

概括

我们开发了一种具有成本效益的方法,用于制造具有边缘接触的石墨烯设备,实现低电阻和非线性特征. 这种技术可以为未来的低功耗电子产品提供高效的电子传输.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
电气工程电气工程

背景情况:

石墨烯场效应晶体管 (GFET) 具有独特的电子特性,但需要高效的接触方法来实现芯片内集成.
在石墨烯设备中实现低接触电阻和受控的电子传输对于性能至关重要.

研究的目的:

介绍一种简单,具有成本效益的制造技术,用于将GFET与纯边缘接触器集成到芯片上.
为了证明对接触几何学的控制,通过石墨烯的1D边缘增强电子传输.

主要方法:

采用了无面具光刻技术,使用智能打印式面具投影和10倍放大镜头.
采用多角度热蒸发 (90°和±45°) 与倾斜角度的样本持有器,用于精确的边缘接触形成.
使用单层化学蒸汽沉积 (CVD) 石墨烯制造的双终端 (2T) GFET设备.

主要成果:

实现纯金属接触到单层石墨烯,通过1D原子边缘实现电子传输.
证明了非常低的接触电阻 (23.5 Ω) 和板电阻 (11.5 Ω).
观察到尖的非线性电压-电流特征 (VCC),对偏向电压高度敏感,表明边缘接触特征.

结论:

开发的制造技术是有效的,用于创建具有边缘接触的高性能GFET.
低电阻和非线性特征对芯片规模电子设备的应用具有前景.
这种方法有助于将石墨烯整合到未来的低功耗电子应用中.

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