Patent ID: 8062835

Claim:
A method of manufacturing a microneedle patch having a plurality of microneedles comprising: forming a photoresist film on a substrate; disposing a photomask having a plurality of island radiation shields each having a shape corresponding to a polygonal bottom face of each microneedle, on the photoresist film followed by integrating the photomask and the photoresist film; applying light from a light source to the photoresist film through the photomask from a plurality of inclined directions to selectively expose the photoresist film; developing the photoresist film to form a master plate having a plurality of recesses or projections corresponding to a plurality of microneedles; manufacturing a replication plate using the master plate; and molding a microneedle patch having a plurality of microneedles using the replication plate, each microneedle having a polygonal bottom face, inclined side walls, and a sharp tip.