| 摘要 |
A security structure is defined for providing a measure of security against counterfeiting of valuable documents and for conveying information tactilely to a user. In one embodiment, the security structure (10) is a laminate that includes a base layer (12) and two outer layers (14, 16) bonded to opposite faces of the base layer. Each outer layer includes a plurality of apertures (28, 30) arranged in a preselected pattern. Each aperture (28, 30), in conjunction with the portion of the base layer (12) adjacent that aperture(28, 30), defines a cavity (32). Each cavity and/or pattern of cavities are configured to convey information to a user through the user's sense of touch. A method of forming the laminate is also disclosed. The method includes bonding the two outer layers to the base layer and forming the apertures in the two sheets using a laser drill. <IMAGE> |
