Patent ID: 8703409

Claim:
A method for forming a microstructure, comprising: (a) forming a layer of photocurable material on a substrate, the photocurable material being constituted by at least one photocurable compound and having a plurality of photocurable molecules; (b) providing a patterned mask having a plurality of light-transmissive regions and a plurality of light-impermeable regions; (c) disposing the patterned mask above the photocurable material layer such that the light-transmissive regions are in register with first regions of the photocurable material layer and the light-impermeable regions are in register with second regions of the photocurable material layer; (d) irradiating the first regions of the photocurable material layer through the light-transmissive regions of the patterned mask using a first light source to permit the photocurable molecules in the first regions to undergo a cross-linking reaction such that the photocurable molecules in the first regions have a reduced concentration which causes the photocurable molecules in the second regions to diffuse into the first regions, thereby raising a profile of the first regions; (e) removing the patterned mask; and (f) irradiating the photocurable material layer using a second light source to permit the photocurable molecules remaining in the first and second regions to undergo a cross-linking reaction, thereby obtaining a microstructure having a surface roughness.