| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a substrate which is capable of improving light extraction efficiency of a light-emitting element, and to provide the light-emitting element. <P>SOLUTION: A substrate 1 according to the present invention is provided with a surface having irregularities for changing a traveling direction of incident or emitted light. The irregularities are provided on the surface periodically along a fixed one-dimensional or two-dimensional direction, and the tops and bottoms of the irregularities have no flat portion. <P>COPYRIGHT: (C)2012,JPO&INPIT |
