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Development of High Performance Optical Silicone for the Packaging of High Power LEDs
Keywords: LED package, Silicone encapsulant, Reliability
Silicone materials with a relatively high refractive index have been introduced for the encapsulation of high power LEDs and LEDs with relatively short wavelengths. However, most of those existing silicone encapsulant, they still suffer thermal and radiation induced degradations and thus cause reliability issues and shorten the lifetime. A new high performance silicone has been developed and its performance has been compared with other silicone products in the packaging of high power blue and white LEDs. The new materials has been found to suffer less loss in the optical output during the aging test, high temperature/high humidity test, as well as JEDEC Level-1 test Thus, this material is excellent for the packaging of high power WLEDs and high power colored LEDs, because of its ability in maintaining high transparency and great radiation/heat resistance.
Yeong-Her Lin, Ph.D. Student
University of California-Irvine
Irvine, CA

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