Diamond-added-copper heat spreader for UV LED applications

Ray-Hua Horng*, Re Ching Lin, Hung Lieh Hu, Kun Cheng Peng, Chen Peng Hsu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

In this study, composite electroplating technique is used to fabricate the diamond-added copper (DAC) heat spreader for UV LED applications. Thermal dissipation characteristic and optical performance are improved as the composite DAC heat spreader adoption. The low thermal resistance of 18.4 K/W with UV LED using DAC heat spreader was measured. Surface temperature of UV LED using the DAC heat spreader is 45.32°C (at 350 mA injecting current), which is lower than those of LEDs using pure copper heat spreader (50.11°C) and only sapphire substrate (62.49°C). The thermal diffusivity of the DAC is 0.7179 cm2/s measurement by laser flash method. Output power and power efficiency of UV LEDs are also enhanced to 71.81 mW and 4.32%, respectively, at 350 mA injection current. The optimal structure design and materials fabrication will be discussed.

Original languageEnglish
JournalElectrochemical and Solid-State Letters
Volume14
Issue number11
DOIs
StatePublished - 11 Oct 2011

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