Abstract: The new method concerns the custom designed lowcost mass production of flexible planar circuits which suit particu-larly for one time use and carry complex prints on at least one face thereof, as may be e.g. RF sensitive tickets or marker tags for electronic security systems. The construction both of planar electrical circuit and printed outfit elements in mutual alignment with each other is based on continuous light printing routines in combination with a production carrier protection and a post etching routine. Light printing may be of the LASER, LED, LCS or like type. The method is computer orchestrated and rolls off prior art barriers in view of limits for custom designs of shape, face, outfit, electrical, and even RF properties of such circuits. Custom designs are easily layouted onscreen of a modern personal computer. The data obtained thereof are downloaded to the production line.

Abstract: A planar LC marker construction useful as an electromagnetically interrogatable transponder is comprised of at least two conductive paths forming planar clockwise and counterclockwise turning spiral patterns (if viewed from the same side) aligned face-to-face, and turn by turn, in opposition to each other, and spaced by an insulative layer. The layer may have various components, at least one of which may be an adhesive layer to co-perform a capacitive function at radio frequency. At least in part that layer may configure as a sheet. The construction features a superior in-system detectivity owing to a very low RF electromagnetic field deflection, and can be produced cheaply for one-time use.

Abstract: The identification device in the form of a tag-like construction affixable to an object has at least one inductive element formed of flat conductor paths and a capacitive element formed from overlapping by overlaying conductor path parts and an interposed dielectric, which forms with the inductive element a closed resonant circuit, the conductor paths being arranged in at least two superimposed surfaces by folding together. In this way the conductor path parts forming the capacitive element are superimposed and they are at least partially identical with the conductor path parts forming the inductive element. In the method for the manufacture of the identification arrangement in the form of a tag-like construction affixable to an object, the conductor path constructions are arranged on an endless carrier path and the folding together of the conductor path construction is effected in that a continuously executed folding of the carrier path is carried out along a perforation line or fold-line.

Abstract: An identification device in the form of a tag-like strip, affixable to an article, for use in an electronic security system comprising opposingly situated conductor strip portions which may be punched out of a metal foil. The conductor strip portions are folded together along suitably positioned fold lines so that mutually superposed conductor strip portions form an uninterrupted winding of inductive elements having a dielectric positioned therebetween. The conductor strip portions can be fabricated on continuous roll and separated by transverse perforations.