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Updated: Jun 28, 2025

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强大的热传输通过表面活性结合SiC-on-SiCC

Guoliang Ma¹, Xinglin Xiao¹, Biwei Meng¹

¹The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China.

ACS applied materials & interfaces

|April 10, 2024

概括

表面活性粘合 (SAB) 可实现直接的半导体粘合,但接口热传输至关重要. 这项研究测量了SiC的导热率和边界电阻,证实SAB形成了强大的接口,对于设备的热管理至关重要.

科学领域:

材料科学材料科学材料科学
固态物理固态物理
纳米技术纳米技术

背景情况:

表面活性粘合 (SAB) 是直接半导体粘合的关键技术.
在SAB中,介层特性和降低厚度可能会影响热传输.
了解热行为对于先进的半导体设备至关重要.

研究的目的:

为了研究4H-SiC薄膜的取决于温度的导热率.
测量由SAB形成的SiC-on-SiC接口的有效热极限电阻 (TBR_eff).
分析TBR_eff对设备热管理的影响.

主要方法:

多个探针波长纳秒的短暂热反射 (MW-TTR) 用于热测量.
密度函数理论 (DFT) 的计算包括四声波散射.
用于界面分析的分子动力学 (MD) 模拟.
2D有限元模拟用于评估热效应.

主要成果:

4H-SiC薄膜的测量导热性与DFT非常一致,突出了高温下四声波散射的重要性.
对SAB SiC-on-SiC接口测量了一个小但非零的TBR_eff.
SAB工艺形成了一个强大的接口与一个非常薄的中间层.
TBR_eff 显著影响设备最大温度 (T_max) 至少 19 °C.

结论:

四声波散射对于4H-SiC在高温应用中的导热性至关重要.
SAB创建了强大的SiC-on-SiC接口,具有最小的热阻.
精确的热传输特性对于优化SAB过程和SiC设备的热管理至关重要.

关键词:

4H-SiC 4H-SiC 是一个四声波散射四声波散射是什么意思表面活性粘合剂表面活性粘合剂热边界电阻的热极限电阻导热率导热率导热率导热率导热率导热率短暂的热反射是短暂的.

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