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APL | 哈尔滨工业大学(深圳)孙华锐团队:Au/Au键合硅-金刚石异质结构深埋层热阻的测量

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APL | 哈尔滨工业大学(深圳)孙华锐团队:Au/Au键合硅-金刚石异质结构深埋层热阻的测量

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近日,哈尔滨工业大学(深圳)孙华锐教授团队联合哈尔滨工业大学、南京师范大学等机构,提出Au/Au键合硅-金刚石异质结构深埋层热阻提取的新方法。研究成果以“Extracting deeply buried thermal resistance in Au/Au-bonded thick Si-on-diamond”为题,发表于《Applied Physics Letters》。哈尔滨工业大学(深圳)何阳和谢银飞博士为论文第一作者,孙华锐教授作为通讯作者。

研究背景:

金属中间层键合技术凭借高导热性和热机械兼容性,成为芯片与高导热散热基板集成的重要方式,其中Au/Au键合因在表面粗糙度耐受性、热适配性等方面的优势,被广泛应用于异质集成。但Au/Au键合引入的多层界面会产生额外的界面热阻,这些热阻会严重阻碍金刚石等高导热基板的散热效率。尤其是深埋的Au/Au键合界面热阻,其精准测量成为优化键合工艺、提升芯片热管理性能的关键问题,然而传统的热物性测量方法却难以应对这一挑战。激光泵浦-探测技术受限于热穿透深度,无法直接测量厚块体异质键合结构中深埋界面的热阻;激光闪光法(LFM)依赖一维热扩散模型,更适用于单一块体材料,无法测量多层异质结构。如何精准提取基于Au/Au键合技术的厚块体异质结构深埋层的热阻,成为异质集成及芯片热管理领域亟待解决的技术难题。

研究内容:

该研究通过Au/Au中间层将厚Si片与金刚石散热器实现低温热压键合,成功制备了Si/Au/Au/金刚石异质结构,创新地提出了一种Au/Au键合异质结构深埋层热阻的提取方法。该方法首先利用Au/Au键合中固有Au中间层作为瞬态热反射法金属换能层提取待键合样品的热物性,并利用LFM测量键合样品的温升曲线,利用有限元仿真与热阻串联模型实现了对各深埋层热阻的提取,并测量了其温度依赖性。研究结果为Au/Au键合工艺优化提供了重要数据,同时为金刚石等超高导热基板在高功率密度器件中的热管理应用释放潜力。

图1 (a)Au/Au键合工艺与异质结构热物性测量示意图;(b)异质结构Au/Au界面热阻随温度变化关系;(c)Si/Au/Au/金刚石异质结构各层组分与总热阻占比随温度变化关系

文章亮点:

为解决传统方法的局限性,团队研发了基于激光瞬态热反射(TTR)和激光闪光法(LFM)的双步混合测量方法,实现了多层结构深埋键合界面热阻的提取,相比传统方法具有显著优势:

  1. 巧用固有Au层,省去金属换能层制备步骤。将Au/Au键合的固有Au中间层直接作为TTR测量的金属换能层,无需在样品表面额外沉积金属换能层,简化了实验流程,同时避免了额外制备步骤对样品结构和热性能的干扰。

  2. 分步表征,精准获取基础热物性参数。在键合前,利用TTR技术系统表征Au键合层与Si和金刚石散热基板的本征热物性,包括Si、金刚石的热导率,以及Au与Si、Au与金刚石的界面热阻,为后续深埋界面热阻提取提供精准的输入参数。

  3. 突破传统LFM模型的局限,采用三维有限元模型(FEM)模拟激光加热过程中的样品温度响应,将TTR测得的基础热参数作为模型输入,仅将深埋Au/Au界面热阻作为唯一未知变量,通过迭代拟合实验数据,实现该热阻的提取。

    团队介绍

    孙华锐,哈尔滨工业大学(深圳)教授、博导,前沿学部理学院副院长。从事半导体材料和器件测试领域的研究工作,近年来发展了宽禁带半导体材料和器件热特性的表征分析方法,揭示了热阻的来源和构成机制,提出了器件电热协同设计的策略,阐明了二维半导体拉曼光谱各向异性的物理起源和调制机理。在Physical Review Letters、Laser & Photonics Reviews、Nature系列期刊等发表论文70余篇,申请/授权发明专利十余件,获广东科技创新青年拔尖人才等奖励,任《人工晶体学报》青年编委、广东省分析测试协会表面分析专业委员会常务委员等。

    文章信息

    Extracting deeply buried thermal resistance in Au/Au-bonded thick Si-on-diamond

    Yang He, Yinfei Xie, Jiwen Zhao, Kechen Zhao, Xiaowu Gao, Huiyu Xu, Weiye Liu, Bing Dai, Yan Zhou, Lifa Zhang, Jiaqi Zhu, Huaixin Guo, Huarui Sun

    Appl. Phys. Lett.128, 081906 (2026)

    https://doi.org/10.1063/5.0314427

    扫描二维码 查看原文

    期刊介绍

    Applied Physics Letters以简明扼要的最新报告为特色,介绍了应用物理学的重大新发现。APL强调关键数据和新的物理学见解的快速传播,及时发表新实验和理论论文,报告物理现象在科学,工程和现代技术的所有分支中的应用。

    关于AIP出版社

    美国物理联合会出版社(AIP 出版社)是美国物理联合会(AIP)旗下的非营利独资出版社。AIP 出版社的使命是在物理和相关科学领域开展学术出版活动,以支持AIP的慈善、科学和教育目标。我们也代表出版合作伙伴进行出版活动,以帮助其积极推进自身的使命。

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    1. CONNECT:[ UseTime:0.000971s ] mysql:host=127.0.0.1;port=3306;dbname=c460;charset=utf8mb4
    2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001692s ]
    3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000966s ]
    4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000754s ]
    5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001506s ]
    6. SELECT * FROM `set` [ RunTime:0.000709s ]
    7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001751s ]
    8. SELECT * FROM `article` WHERE `id` = 624492 LIMIT 1 [ RunTime:0.007978s ]
    9. UPDATE `article` SET `lasttime` = 1784352841 WHERE `id` = 624492 [ RunTime:0.032005s ]
    10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000940s ]
    11. SELECT * FROM `article` WHERE `id` < 624492 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.009044s ]
    12. SELECT * FROM `article` WHERE `id` > 624492 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.011191s ]
    13. SELECT * FROM `article` WHERE `id` < 624492 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.015597s ]
    14. SELECT * FROM `article` WHERE `id` < 624492 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.014884s ]
    15. SELECT * FROM `article` WHERE `id` < 624492 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.018338s ]
    0.214907s