Patent ID: 7294389

Claim:
A microstructure array comprising: a substrate having an electrically-conductive portion; an insulating mask covering the electrically conductive portion in which a plurality of openings are arranged to expose the electrically-conductive portion; and an array of a microstructure each constituted by a first layer and a second layer, in which the first layer is disposed in each of the openings and on the insulating mask and the second layer is laminated on the first layer with a uniform thickness, wherein the first layer has a semisphere or a semicylinder shape and the second layer has a semisphere or semicylinder shape according to the shape of the first layer, and wherein a thickness of the second layer is uniform over the entire array such that a distribution of a bottom diameter of the microstructure in the microstructure array is decreased from the distribution of the bottom diameter of the semisphere or semicylinder of the first layer.