Identification film and pattern including photonic crystals and anticounterfeiting product including the same

A method of manufacturing an identification film, the method comprising:

• preparing a pattern region by injecting a colloidal dispersion in which colloidal particles are dispersed in a photocurable monomer between two parallel flat plates,
• positioning a mask pattern having a predetermined shape on the flat plates, photocuring the colloidal dispersion, and removing a portion of the colloidal dispersion having not been photocured;
• and
• preparing a binding region by injecting a photocurable monomer or a photocurable colloidal dispersion into a region from which the non-photocured portion has been removed, followed by photocuring,
• wherein colloidal particles injected in the preparing of the pattern region and colloidal particles injected in the preparing of the binding region have different sizes, and
• wherein the method is performed such that a plurality of identification films is manufactured and adhered to one another to form multiple layers.