One of the factors affecting the pearl light decay of white LED lamps: chip
The influence of wafers on LED light decay is divided into two categories: the first is that different materials of wafers lead to different attenuation. Commonly used blue wafer substrate materials are silicon carbide and sapphire. The general structure of silicon carbide is designed as a single electrode, and its thermal conductivity effect Better, sapphire is generally designed as a double electrode, the heat is difficult to export, and the thermal conductivity is poor;
The second is the size of the wafer. When the material of the wafer is the same, the attenuation gap is different for different sizes.
