Patent ID: 8445178

Claim:
A method of forming a pattern, comprising: preparing a first composition for radical polymerization including a photosensitive material, a photoinitiator comprising an acetophenone-based, benzoin-based, benzophenone-based, or thioxanthenone-based photoinitiator, or any combination thereof, a solvent, and a material for adjusting a size of a pattern, wherein the material for adjusting the size of a pattern is a radical scavenger; applying the first composition for radical polymerization to a surface of a substrate to form a first film; irradiating the first film with light having a first energy according to a first pattern to selectively expose the first film; and developing the light-exposed first film to obtain the first pattern, wherein the size of the first pattern is adjusted to be smaller than the size of a second pattern, wherein the second pattern is obtained by applying, to a surface of a substrate, a second composition for radical polymerization including a photosensitive material, a photoinitiator, and a solvent in a same weight ratio as corresponding components in the first composition for radical polymerization, to obtain a second film with a thickness the same as that of the first film, then irradiating the second film with light having a first energy according to the first pattern to selectively expose the second film to light and developing the light-exposed second film, to form a second pattern.