Patent ID: 7295745

Claim:
A method for fabricating a periodic structure having a first layer constituted by a plurality of first columnar members arrayed at first intervals and a second layer constituted by a plurality of second columnar members arrayed at second intervals in a direction different from a long-side direction of the first columnar members, wherein the first layer and the second layer are laminated to each other, the method comprises the steps of: preparing the first columnar members having the convex parts by a process comprising the steps of: forming a film made of a material for the first columnar member on a substrate; forming a first mask at the positions corresponding to the first convex parts on the film; forming a second mask on the film and on the first mask; forming grooves on the second mask at the first intervals; removing the film at the positions corresponding to the grooves; removing the second mask; and forming the first convex parts by using the first mask, wherein each first columnar member has a plurality of the first convex parts on a surface, and the length of each first convex part in the long-side direction of the first columnar member is longer than a width of the second columnar members; and laminating the first columnar members and the second columnar members via the first convex parts.