| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light emitting device that increases an efficiency of extracting light from the upper surface of a high refractive-index layer provided on the upper surface of a light emitting element and also increases an efficiency of extracting light from the light emitting element itself. <P>SOLUTION: An LED element 4 mounted on a substrate 2 of a light emitting device is sealed with sealing resin 6. A high refractive-index layer 8 formed of a dimethyl silicone type high refractive-index material is provided on the upper surface of the LED element 4. The LED element 4 is mounted on the substrate 2 by flip-chip, and an underfill 10 formed of a dimethyl silicone type high refractive-index material is provided between the LED element 4 and the substrate 2. The refractive index is stepwise reduced from the LED element 4 to external air, and a light extracting efficiency can be enhanced with light reflected from the substrate 2 just below the LED element 4. <P>COPYRIGHT: (C)2012,JPO&INPIT |
