Laser-engraved seal

Abstract

A laser-engraved seal is provided with improved tamper-resistance, in which the laser-engraved seal includes a surface layer and an adhesive layer, wherein laser engraving on the seal is performed such that the applicable part of the surface layer is removed to form a background pattern, and an identification mark is formed inside the background pattern. The laser-engraved seal includes a surface layer having a first color serving as a release layer, and a base material layer having a second color including a base material or an adhesive layer serving as a base material, and the laser-engraved seal further includes a background pattern formed by removing part of the surface layer by laser engraving performed on the surface layer, and an identification mark formed as a recess inside the background pattern by removing part of the base material layer by laser engraving.

Dependencies are inferred from the claim text.