环氧树脂对LED性能的影响  

Influence of Epoxy Resin upon LED Performance

作　　者：李绪锋 

机构地区：[1]佛山市光电器材公司,广东佛山528000

出　　处：《发光学报》2002年第1期97-100,共4页Chinese Journal of Luminescence

摘　　要：环氧树脂是封装发光二极管的主要材料之一 ,其性能直接影响制品的可靠性 ,光输出效果等。因此 ,LED制造过程 ,必须根据制品使用场合 ,合理选用树脂 。Epoxy resin is one of the essential materials of LED, its performance affects directly on the reliability and output effect of the products. So, in the process of manufacturing LED,the epoxy resin should be selected according to the situations, make sure the product are satisfied customers' requirements. 1. The influence of epoxy resin upon the reliability of the products Use №. 02, 12, 14 (with other same material e.g. chips) to package 3 transparent type LEDs. In half of them is used in the second bond position to fix. Carry the soldering heat-resistant trial and PCB trial on the products (store in high temperature in the condition of external force). It is proved that №.14 epoxy resin is the best choice for improving products reliability. 2. The influence of epoxy resin upon the light output effect of the products Use №. 02, 12, 14 (with other same material e.g. chips) to package 5 transparent type infrared LED (each 20 pcs). Test the light power of some samples. It showed that considering the light output efficiency, we should select №. 12 epoxy resin. Test the samples connecting power supply in low temperature to evaluate the output stability of the products. It is proved that those products with the worse output have the little light output diminution as time goes by. Carry on the same light output and light diminution comparison tests on visible light LEDs, we have the same conclusion. So, it can be proved that the conclusion mentioned above is correct and common. 3. The light selecting performance of epoxy resin According to the spectra of three kinds of photodiode made from different epoxy resins in the tests, we found light with wavelength in the range of 700～ 1 000nm is easy to pass through for 18C epoxy resin and 10B epoxy resin. Obviously, this material is not suitable for manufacturing the infrared opto-devices with high requirements on light selecting performance. While the 02B epoxy resin is only sensitive to infrared light with wavelength over 800nm. Using

关 键 词：环氧树脂 可靠性 光输出效果 光选择性 LED 发光二极管 

分 类 号：TN312.8[电子电信—物理电子学]