Surface microstructures and substrates with surface microstructures

摘要

The surface microstructure comprises a plurality of first protrusions separated by a first crevasse between each pair, and a plurality of second convex portions separated by a second crevasse between the first and second sides of the first crevasse and having a length less than the first crevasse In the plan view, a plurality of second convex portions are observed in fine granularity as compared with a plurality of first convex portions.