Patent ID: 8871433

Claim:
A method for producing a microstructure comprising: a first step of disposing a first mask on a photosensitive resin and disposing a second mask above the first mask, the photosensitive resin being unexposed, the first mask containing a light-transmitting part having a first predetermined amount of light transmitting therethrough and a light-blocking part having a second predetermined amount of light transmitting therethrough, which is smaller than the first predetermined amount, and the second mask containing a light-transmitting part having a third predetermined amount of light transmitting therethrough and a light-blocking part having a fourth predetermined amount of light transmitting therethrough, which is smaller than the third predetermined amount; and a second step of integrally rotating the photosensitive resin and the first mask around a central axis of rotation passing through the photosensitive resin and the first mask, and irradiating an exposure light from a first side of the second mask opposite the photosensitive resin and the first mask in a direction angularly disposed relative to the central axis, thereby exposing the photosensitive resin to a light flux of the exposure light transmitting through the second mask and the first mask.