NDLI: Optimization design of cup-shaped copper heat spreaders for high-power InGaN/sapphire LEDs

Content Provider	IEEE Xplore Digital Library
Author	Ching-Bei Lin Ray-Hua Horng Yu-Li Tsai Dong-Sing Wuu Heng-I Lin
Copyright Year	2009
Description	Author affiliation: Department of Electro-Optical Engineering, National Cheng Kung University, 1 University Rd., Tainan 701, Taiwan R.O.C. (Ray-Hua Horng) \|\| Liung Feng Industrial Co., LTD, Taiwan, R.O.C. (Heng-I Lin) \|\| Institute of Precision Engineering, 1 University Rd., Tainan 701, Taiwan R.O.C. (Ching-Bei Lin; Yu-Li Tsai) \|\| Department of Materials Science and Engineering, National Chung Hsing University, 1 University Rd., Tainan 701, Taiwan R.O.C. (Dong-Sing Wuu)
Abstract	To improve light extraction efficiency and heat dissipation of sapphire-based light-emitting diodes (LEDs), we develop and optimize copper heat spreader which was electroformed in close contact with sapphire. On the basis of simulation results, an LED with copper lowers junction temperature when compared with the LED without copper. In addition, a copper-surrounded LED with protruded bottom surface exhibits almost the same thermal performance as that with flat bottom surface. In practical fabrication, all the LED samples with copper show significant reduction in junction temperature form 150.4°C for the original LED to less than 100°C at injection current of 1 A (∼ 3 $W/mm^{2}).$ The encapsulated LED at the same driven current yields an output power of ∼700 mW, which is 2.7 times higher than that of the original LED without copper.
Starting Page	689
Ending Page	691
File Size	2645186
Page Count	3
File Format	PDF
ISBN	9781424443413
DOI	10.1109/IMPACT.2009.5382281
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-10-21
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Design engineering Temperature Thermal resistance Heat engines Lasers and Electro-Optics Society Light emitting diodes Copper Gallium nitride Power generation Design optimization
Content Type	Text
Resource Type	Article

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