中国半导体行业协会封装分会会刊

中国电子学会电子制造与封装技术分会会刊

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电子与封装 ›› 2023, Vol. 23 ›› Issue (10): 100201 . doi: 10.16257/j.cnki.1681-1070.2023.0124

• 封装、组装与测试 •    下一篇

大功率LED芯片直接固晶热电制冷器主动散热*

梁仁瓅1,2,牟运3,彭洋4,胡涛1,王新中1   

  1. 1. 深圳信息职业技术学院信息技术研究所,广东 深圳 518172;2.电子科技大学深圳高等研究院,广东 深圳 518110;3. 中山大学集成电路学院,广东 深圳 518107;4. 华中科技大学航空航天学院,武汉 430074
  • 收稿日期:2023-04-24 出版日期:2023-10-31 发布日期:2023-05-24
  • 作者简介:梁仁瓅(1993—),男,山西大同人,博士,副研究员,主要从事先进电子封装材料与技术研究。

Active Heat Dissipation of High-Power LED Chip Directly Bonded on Thermoelectric Cooler

LIANG Renli1,2, MOU Yun3, PENG Yang4, HU Tao1, WANG Xinzhong1   

  1. 1. Information Technology Research Institute, Shenzhen Institute and Information Technology, Shenzhen 518172, China;2.Shenzhen Institute for Advanced Study, University of Electronic Science andTechnology of China, Shenzhen 518110,China;3.School of Integrated Circuits,Sun Yat-sen University,Shenzhen518107,China;4. School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2023-04-24 Online:2023-10-31 Published:2023-05-24

摘要: 发光二极管(LED)作为新一代绿色固态照明光源,已广泛应用于照明和显示等领域,但散热问题一直是大功率LED封装的关键技术瓶颈。采用大功率LED芯片直接固晶热电制冷器(TEC)的主动散热方法,可增强大功率LED的热耗散,提升大功率LED的发光性能和长期可靠性。利用高精度陶瓷基板和纳米银膏材料制备出高性能TEC,TEC冷端温度最低可达-22.2℃。将LED芯片直接固晶于TEC冷端的陶瓷基板焊盘上,实现LED芯片与TEC的集成封装,制备出LED-TEC主动散热模块。在芯片电流为1.0 A时,由于热电制冷的珀尔帖效应,LED-TEC模块可将LED芯片的工作温度从232℃降低到123℃(降温幅度为109℃),且可使其输出光功率从1087 mW提升到1479 mW,光功率提升幅度达到36.1%。

关键词: 大功率LED, 主动散热, 热电制冷器, 芯片固晶, 光热性能

Abstract: Light-emitting diode (LED) has been considered as a new generation of green solid-state lighting source, which has been widely used in lighting and display and other fields. However, heat dissipation problem is a key technical bottleneck of high-power LED packaging.An active heat dissipation method of high-power LED chip directly bonded on thermoelectric cooler (TEC) is adopted to enhance the heat dissipation of high-power LED, which can improve the optical performance and long-term reliability of high-power LED.High-performance TECs are prepared by utilizing high-precision ceramic substrates and nano-silver paste materials, and the temperature of the TEC cold-side can reach as low as -22.2 ℃.The LED chip is directly bonded on the cold-side ceramic substrate of TEC. The LED chip and TEC are integrated and packaged to prepare an LED-TEC active heat dissipation module.At a chip current of 1.0 A, due to the Palter effect of thermoelectric cooling, the LED-TEC module can reduce the operating temperature of LED chips from 232 ℃to 123 ℃ (decreased by 109 ℃), and the output light power of LED chips can be increased by 36.1%, from 1087 mW to 1479 mW.

Key words: high-power LED, active heat dissipation, thermoelectric cooler, chip bonding, opto-thermal performance

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