Anti-counterfeiting structure

An anti-counterfeiting structure, comprising:

• an information-containing layer containing visible information;
• a first layer transmissible to a laser beam;
• a second layer transmissible to a laser beam, at least a part of the second layer being located between the information-containing layer and the first layer;
• and
• a coating layer transmissible to a laser beam and covering at least the first layer,
• wherein the coating layer and the first layer are bonded together more weakly than the first layer and the second layer are,
• wherein one of the first layer and the second layer is a foamable layer having a characteristic of changing from a pre-foamed state to a foamed state in response to laser irradiation,
• wherein the other of the first layer and the second layer is an optical device, and
• wherein the foamable layer includes:
• a foamable member;
• and
• a foam-promoting portion having a part overlapping with a part of the foamable member in a plan view of the coating layer and having a characteristic of promoting foaming in the part of the foamable member by laser irradiation.

An anti-counterfeiting structure, comprising:

• an information-containing layer containing visible information;
• a first layer transmissible to a laser beam;
• a second layer transmissible to a laser beam, at least a part of the second layer being located between the information-containing layer and the first layer;
• and
• a coating layer transmissible to a laser beam and covering at least the first layer,
• wherein the coating layer and the first layer are bonded together more weakly than the first layer and the second layer are,
• wherein one of the first layer and the second layer is a foamable layer having a characteristic of changing from an unfoamed state to a foamed state in response to laser irradiation and including a foamed part,
• wherein the other of the first layer and the second layer is an optical device, and
• wherein the foamable layer includes:
• a foamable member;
• and
• a foam-promoting portion having a part overlapping with a part of the foamable member in a plan view of the coating layer and having a characteristic of promoting foaming in the part of the foamable member by laser irradiation.