Abstract: This disclosure includes a method for manufacturing a portable data carrier, an inlay for a data carrier, and a data carrier. A data carrier body has a gap for a chip and a chip is incorporated into the gap. In a subsequent step a cover layer is laid on the data carrier body, and the data carrier body and the cover layer are laminated. After the incorporation of the chip and before the lamination, a stabilizing agent is applied into the gap of the core layer, which remains soft or flexible during the lamination and cures or is activated (e.g. by means of UV radiation) only after the lamination, in order for mechanical tensions to be avoided.

Abstract: A method for producing a data storage medium body for a portable data storage medium having a core layer and at least one top layer, wherein the core layer contains a chip module. The chip module has a surface which is adverse to lamination and has an adhesive deposit applied on the module surface; a recess is provided in the core layer and the chip module is inserted into the recess such that the module surface having the adhesive deposit is situated towards the open side of the recess; a top layer is applied over the module surface; then the above arrangement is laminated. The adhesive deposit combines intimately with the adjoining top layer.

Abstract: This disclosure includes a method for manufacturing a portable data carrier, an inlay for a data carrier, and a data carrier. A data carrier body has a gap for a chip and a chip is incorporated into the gap. In a subsequent step a cover layer is laid on the data carrier body, and the data carrier body and the cover layer are laminated. After the incorporation of the chip and before the lamination, a stabilizing agent is applied into the gap of the core layer, which remains soft or flexible during the lamination and cures or is activated (e.g. by means of UV radiation) only after the lamination, in order for mechanical tensions to be avoided.

Abstract: A multi-layer card-shaped data carrier has a marking layer containing a hidden marking, and a thermochromic cover layer arranged over the marking layer at least in the area of the hidden marking. The thermochromic cover layer is opaque below its change temperature, hides the marking, and is translucent or transparent above its change temperature, enabling viewing of the marking. The thermochromic cover layer is pervious to radiation outside the visible spectral range and the marking layer absorbs radiation energy outside the visible spectral range, so that the hidden marking can be incorporated into the marking layer through the thermochromic cover layer by laser radiation of a wavelength outside the visible spectral range.

Abstract: A method for producing a data storage medium body for a portable data storage medium having a core layer and at least one top layer, wherein the core layer contains a chip module. The chip module has a surface which is adverse to lamination and has an adhesive deposit applied on the module surface; a recess is provided in the core layer and the chip module is inserted into the recess such that the module surface having the adhesive deposit is situated towards the open side of the recess; a top layer is applied over the module surface; then the above arrangement is laminated. The adhesive deposit combines intimately with the adjoining top layer.

Abstract: The invention relates to a card (1), such as a credit card or ID card, which has several layers laminated with each other, wherein between a first card layer (21) and a second card layer (22) there is embedded a security element (2) which has a plastic or lacquer layer (4) with a relief structure (5). The relief structure has areas (5?, 5?) with different picture elements and produces a visible representation (6) and a hidden representation (7) which can be made visible with aids. The security element is adhesively bonded by adhesive layers (9, 10) to the two card layers (21, 22) between which it is embedded, the adhesives being chosen from the group which consists of physically drying adhesives and adhesives crosslinkable by heat, preferably water-based. Upon use of an adhesive crosslinkable by heat, the crosslinking temperature of the adhesive is lower than the softening temperature of the plastic or the lacquer layer (4) in which there is present the relief structure (5).

Abstract: A multi-layer card-shaped data carrier has a marking layer containing a hidden marking, and a thermochromic cover layer arranged over the marking layer at least in the area of the hidden marking. The thermochromic cover layer is opaque below its change temperature, hides the marking, and is translucent or transparent above its change temperature, enabling viewing of the marking. The thermochromic cover layer is pervious to radiation outside the visible spectral range and the marking layer absorbs radiation energy outside the visible spectral range, so that the hidden marking can be incorporated into the marking layer through the thermochromic cover layer by laser radiation of a wavelength outside the visible spectral range.

Abstract: The invention relates to a card (1), such as a credit card or ID card, which has several layers laminated with each other, wherein between a first card layer (21) and a second card layer (22) there is embedded a security element (2) which has a plastic or lacquer layer (4) with a relief structure (5). The relief structure has areas (5?, 5?) with different picture elements and produces a visible representation (6) and a hidden representation (7) which can be made visible with aids. The security element is adhesively bonded by adhesive layers (9, 10) to the two card layers (21, 22) between which it is embedded, the adhesives being chosen from the group which consists of physically drying adhesives and adhesives crosslinkable by heat, preferably water-based. Upon use of an adhesive crosslinkable by heat, the crosslinking temperature of the adhesive is lower than the softening temperature of the plastic or the lacquer layer (4) in which there is present the relief structure (5).