| 摘要 |
The purpose of the present invention is to provide a light-reflecting substrate which demonstrates high optical reflectance and which enables light emission to be obtained that is low in reflectance anisotropy and that has excellent isotropy; also provided is a light-emitting element using the same. This light- reflecting substrate comprises an aluminum substrate and an aluminum anodic oxide film provided on the aluminum substrate. On the surface of the aluminum anodic oxide film, the ratio between surface roughness (Ra1) in a first direction and surface roughness (Ra2) in a second direction perpendicular to the first direction is 0.4 to 1.0 (Where, out of (Ra1) and (Ra2), the larger value is set as the denominator and the smaller value is set as the numerator, and if (Ra1) and (Ra2) are the same value, either can be the denominator); (Ra1) and (Ra2) are each 0.1 to 0.4 µm. |
