High-performance optical silicone for high power LED packages

論文發表人：林永河 (加州大學爾灣分校化學工程與材料科學研究所博士班)

 

http://www.imaps.org/imaps2009/index.htm

 

近幾年, 高折射率矽氧樹酯普遍被用在高功率發光二極體封裝包覆材料° 然而, 大部分的高折射率矽氧樹酯還是存在可靠度問題當材料受到溫度與光線的影響在高功率發光二極體封裝中° 所以 我們開發了一種新的高性能矽氧樹酯可以有很好的封裝可靠度並且可通過JEDEC可靠度測試° 此種材料非常適合用在高功率發光二極體封裝°

 

The encapsulant materials for light emitting diodes (LEDs) were made by organic polymers, such as epoxy or acrylic, because of their hardness, high refractive index, and low cost. Recently, silicone with high refractive index was also used in LED encapsulant materials. All of these encapsulant materials have reliability issue under high temperature and radiation power in high power LED. A new high performance optical silicone elastomer had been prepared, and compared with high refractive index silicone and optical epoxy in high power LED package. The high performance optical silicone had less light output loss than high refractive index silicone and optical epoxy under UV radiation test and thermal test.  The high performance silicone, high refractive index silicone, and optical epoxy were also tested under JEDEC level 1 for moisture sensitivity test.  Therefore, maintaining high transparency and good heat resistance make high performance optical silicone suitable for high power LED encapsulant materials.