A method of manufacturing a master plate includes the steps of forming a photoresist film on a substrate, disposing a photomask having a plurality of island radiation shields 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 for selectively exposing the photoresist film, and developing the photoresist film to form a master plate, in which the method includes irradiating the photoresist film with the light from plural directions through the photomask to selectively expose the photoresist film from the respective directions.
