NDLI: Influence of AlN Thin Film as Thermal Interface Material on Thermal and Optical Properties of High-Power LED

Content Provider	IEEE Xplore Digital Library
Author	Subramani, S. Devarajan, M.
Copyright Year	2001
Abstract	An AlN thin film was fabricated and used as a thermal interface material (TIM) for a high-power light-emitting diode (LED) application. The AlN thin film was stacked with an Al thin film on Al substrates and used as a heat sink. The thermal behavior of a 3-W green LED mounted on the AlN and AlN/Al stack thin-film-coated substrates was tested using a dual interface method. A low value in junction temperature (T_J) of the LED was observed with an AlN/Al stack used as the interface. The observed total thermal resistance (R_th-tot) was low for the AlN/Al-stack-coated Al substrates compared to the bare and thermal-paste-applied Al substrates. The interface thermal resistance (R_th-b-hs) was influenced by the driving currents and observed a low value with the AlN-based coatings. Improved luminosity was observed from the LED with the AlN/Al stack as the TIM. The observed correlated color temperature (CCT) was low for the AlN/Al stack at all driving currents. No significant change was observed in the color rendering index (CRI) and peak wavelength (λ_peak).
Sponsorship	IEEE Electron Devices Society IEEE Reliability Society
Starting Page	30
Ending Page	34
Page Count	5
File Size	795784
File Format	PDF
ISSN	15304388
Volume Number	14
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	III-V semiconductor materials Substrates Light emitting diodes Annealing Current measurement Thermal resistance thermal properties AlN LED optical properties thin film stack thermal interface material
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Safety, Risk, Reliability and Quality Electrical and Electronic Engineering

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