{"title":"Semi-in-situ thermal transport characterization of thermal interface materials through a low-frequency thermoreflectance technique","authors":"","doi":"10.1016/j.measurement.2024.115648","DOIUrl":null,"url":null,"abstract":"<div><p>Thermal transport characterization of thermal interface materials (TIMs), especially in their application scenario is so far challenging. Herein, we demonstrate a low-frequency frequency domain thermoreflectance technique to measure the semi-in-situ thermal transport properties of TIMs in a sandwiched structure. The measurement ability is first demonstrated by accurate measurement on several well-known materials. Then the thermal conductivity and interface thermal resistance of a thermal gel, a thermal pad composed of phase change materials and an Indium foil, sandwiched in two silicon slides are investigated. Sensitivity analysis emphasized the importance of pump laser spot size and modulation frequency in the measurement. For TIMs with low thermal conductivity, the sensitivity to interface thermal resistance is highly suppressed, while for TIMs with high thermal conductivity, the sensitivity to interface thermal resistance is prominent, which makes it easier to separately determine the TIM thermal conductivity and interface thermal resistance.</p></div>","PeriodicalId":18349,"journal":{"name":"Measurement","volume":null,"pages":null},"PeriodicalIF":5.2000,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Measurement","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0263224124015331","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Thermal transport characterization of thermal interface materials (TIMs), especially in their application scenario is so far challenging. Herein, we demonstrate a low-frequency frequency domain thermoreflectance technique to measure the semi-in-situ thermal transport properties of TIMs in a sandwiched structure. The measurement ability is first demonstrated by accurate measurement on several well-known materials. Then the thermal conductivity and interface thermal resistance of a thermal gel, a thermal pad composed of phase change materials and an Indium foil, sandwiched in two silicon slides are investigated. Sensitivity analysis emphasized the importance of pump laser spot size and modulation frequency in the measurement. For TIMs with low thermal conductivity, the sensitivity to interface thermal resistance is highly suppressed, while for TIMs with high thermal conductivity, the sensitivity to interface thermal resistance is prominent, which makes it easier to separately determine the TIM thermal conductivity and interface thermal resistance.
迄今为止,热界面材料(TIMs)的热传输表征,尤其是在其应用场景中的热传输表征,是一项具有挑战性的工作。在此,我们展示了一种低频频域热反射技术,用于测量夹层结构中热界面材料的半原位热传输特性。首先通过对几种知名材料的精确测量证明了测量能力。然后研究了夹在两个硅片中的热凝胶、相变材料组成的热垫和铟箔的热导率和界面热阻。灵敏度分析强调了泵浦激光光斑大小和调制频率在测量中的重要性。对于热导率低的 TIM,界面热阻的灵敏度被高度抑制,而对于热导率高的 TIM,界面热阻的灵敏度则非常突出,这使得分别测定 TIM 热导率和界面热阻变得更加容易。
期刊介绍:
Contributions are invited on novel achievements in all fields of measurement and instrumentation science and technology. Authors are encouraged to submit novel material, whose ultimate goal is an advancement in the state of the art of: measurement and metrology fundamentals, sensors, measurement instruments, measurement and estimation techniques, measurement data processing and fusion algorithms, evaluation procedures and methodologies for plants and industrial processes, performance analysis of systems, processes and algorithms, mathematical models for measurement-oriented purposes, distributed measurement systems in a connected world.