Radiation reflection plate for LED

摘要

A radiation reflection plate for use in LEDs is a reflection plate including an aluminum alloy layer with a depth of at least 10 µm and an anodized film formed at a surface thereof. Pore portions of the anodized film have at least two layers of different refractive indices in a depth direction, and light reflection is enhanced in the anodized film. The radiation reflection plate has high heat dissipation properties and is capable of increasing the reflectance of light at desired specific wavelengths.