液体金属的高精度接触电阻测量方法,通过考虑传输长度方法的电流密度分布进行测量
Takashi Sato1, Eiji Iwase1,2,3
1Department of Materials Science, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan.
ACS applied materials & interfaces
|September 11, 2023
概括
精确测量液体金属 (LMs) 中的接触电阻 (Rc) 对可伸缩电子产品至关重要. 这项研究引入了一种精细的传输长度方法 (TLM),该方法可以考虑电流分布,从而获得加里斯坦和铜电极的精确Rc值.
科学领域:
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
- 纳米技术 纳米技术
背景情况:
- 液体金属 (LMs),特别是基于Ga的金属,由于其导电性,对于可拉伸电子来说至关重要.
- 准确地描述电气性能,如接触电阻 (Rc),对于设备的性能至关重要.
- 当物体和电极电阻相似时,传统的传输长度方法 (TLM) 测量具有局限性.
研究的目的:
- 开发和验证一种精确的方法来确定galinstan和铜电极之间的接触电阻 (Rc).
- 通过考虑电流密度分布来解决传统TLM的局限性.
- 为了能够更可靠地开发使用液体金属的可拉伸电子设备.
主要方法:
- 提出了通过将电流应用于单个测量电极来修改的TLM,与传统的外部电极应用不同.
- 利用模拟来分析电流密度分布及其对电阻测量的影响.
- 将新方法的结果与传统的TLM进行比较,以突出差异.
主要成果:
- 发现,在TLM测量中不能忽视加利斯坦的板电阻.
- 这种新方法准确地捕获了整个接触电阻组件,与传统方法不同 (<10%).
- 达到0.115mΩ·mm2的低接触电阻 (ρc),明显低于接器.
结论:
- 精确的Rc测量需要将电流应用于每个电极,并考虑体积电阻.
- 开发的方法提供了一种更可靠的方法来测量LM接触电阻.
- 这项研究通过提供精确的电气接口表征,促进了可伸缩电子技术的进步.
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