Patent ID: 9550234
Date: 2017-01-24
CPC Classifications: B22F,G06K,H01B,H01L,H05K,Y10T

Claim:
1. A chip card or chip card inlet, comprising a plurality of foil layers connected through hot lamination and an electronic circuit unit with at least one 1C-chip and at least one coil and/or at least one foil switch, wherein the conductor structure of the coil and/or of the foil switch consists of sintered metallic nanoparticles and is obtained by: (a) applying a dispersion, containing metallic nanoparticles, in a form which corresponds to the form of the conductor structure to be formed, to a surface of a transfer material to provide a precursor conductor structure formed by the nanoparticles; (b) sintering the metallic nanoparticles forming the precursor conductor structure by supplying heat to the nanoparticles so as to form the electrically conductive conductor structure on the surface of the transfer material; (c) bringing into contact a surface of a foil material and the surface of the transfer material on which the electrically conductive conductor structure is located; (d) transferring the electrically conductive conductor structure from the surface of the transfer material onto the contacting surface of the foil material by exerting pressure; and (e) where applicable, detaching segments of a desired size from the foil material, a segment having at least one electrically conductive conductor structure; wherein the steps (c), (d) and, where applicable, (e) are carried out immediately subsequent to the steps (a) and (b) or at any later point in time, and wherein the transfer material comprises a heated roller made of or coated with a high-temperature-resistant plastic.