Abstract: The invention relates to sewable tamper detection elements for radio frequency identification devices, and to radio frequency identification devices with such tamper detection elements. The devices can be sewn into a seam of a garment so that the tamper detection element is partially inside the garment, e.g. as part of a care label. This makes removing the device difficult without breaking the tamper detection element, and thereby shoplifting attempts can be more reliably noticed. For this purpose, the tamper detection element is formed so that sewing through it does not break the element. The radio frequency identification device may be formed asymmetric so that the tamper detection element is on a different side from the antenna elements with respect to the chip. In this manner, the disturbance from the tamper detection element to the antenna can be minimized. The tamper detection element may be formed so that it contains a transparent opening on which text can be printed.

Abstract: An assembly for a radio frequency (RF) communication circuit includes an electrically insulating substrate having a first side and a second side. A first electrically conductive structure is arranged on the first side of the substrate. The first electrically conductive structure has the structure of a split loop that has a first end and a second end. The RF communication circuit is arranged to be attached to a site for the RF communication circuit between the first end and the second end. The assembly also includes a second electrically conductive structure arranged on the second side of the substrate. The second electrically conductive structure is arranged with respect to the first electrically conductive structure in such a manner that the site for the RF communication circuit overlaps the second electrically conductive structure in order to increase the capacitance of the assembly for the RF communication circuit.

Abstract: The invention relates to sewable tamper detection elements for radio frequency identification devices, and to radio frequency identification devices with such tamper detection elements. The devices can be sewn into a seam of a garment so that the tamper detection element is partially inside the garment, e.g. as part of a care label. This makes removing the device difficult without breaking the tamper detection element, and thereby shoplifting attempts can be more reliably noticed. For this purpose, the tamper detection element is formed so that sewing through it does not break the element. The radio frequency identification device may be formed asymmetric so that the tamper detection element is on a different side from the antenna elements with respect to the chip. In this manner, the disturbance from the tamper detection element to the antenna can be minimized. The tamper detection element may be formed so that it contains a transparent opening on which text can be printed.

Abstract: A method for manufacturing a component by etching, the component including a substrate and an electrically conductive line configuration supported by the substrate, the electrically conductive line configuration being formed by etching away locally an electrically conductive coating supported by the substrate. An etching mask is used to control locally removal and maintenance of the electrically conductive coating by using an etchant and it includes barrier material on at least one main area corresponding to the electrically conductive line configuration to be maintained during etching. The etching mask further includes at least one sub-area comprising barrier material, the sub-area being arranged at a distance from the edge of the main area.

Abstract: A method for manufacturing a component by etching, the component including a substrate and an electrically conductive line configuration supported by the substrate, the electrically conductive line configuration being formed by etching away locally an electrically conductive coating supported by the substrate. An etching mask is used to control locally removal and maintenance of the electrically conductive coating by using an etchant and it includes barrier material on at least one main area corresponding to the electrically conductive line configuration to be maintained during etching The etching mask further includes at least one sub-area comprising barrier material, the sub-area being arranged at a distance from the edge of the main area.