A light diffraction structure, an authentication pattern, an authentication label, a manufacturing method of a diffractive structure, an authentication pattern manufacturing method, and an authentication label manufacturing method

摘要

A light diffracting sturcture 10 within an authematizing pattern 20 is used to authenticate the various authentication devices and to prevent forgery of the various authentication devices .;This optical diffraction structure 10 has unique parameters that generate a uniquely colored pattern. This unique parameter is arbitrarily defined by the anisotropic process steps during the fabrication of the diffractive structure and is not under full control of the producer. This prevents replication or occurrence of an exact replica.;The authentication pattern 20 includes an integrated structure of a substrate layer 21 and a transparent overcoat layer 22 and a visible boundary surface including the strong diffractive structure 10 therebetween viewable interface).;The authentication pattern of a unique color can be proved by simply observing it with the naked eye, which is a prerequisite for ubiquitous verification.