Method for adding RF powder and RF powder-added base sheet

摘要

A method is provided for adding an RF powder to a sheet-like object having a high property value, such as a variety of cards, paper money, and securities. The RF powder makes it very difficult to produce, for example, counterfeit cards, documents and bills. Also, an RF powder-added base sheet to which the RF powder has been added is provided. In the method for adding the RF powder, the RF powder includes a plurality of RF powder particles 11 and is disposed on a surface of a base sheet 10 to add the RF powder to the base sheet. Each RF powder particle 11 has a magnetic field coupling circuit element in a high frequency magnetic field having a specific frequency. The RF powder is disposed on a surface of a base sheet by a printing technique. The RF powder-added base sheet 10 includes an RF powder including a plurality of RF powder particles 11 disposed within a printed object on a surface of a base sheet. Each RF powder particle 11 has a magnetic field coupling circuit element in a high frequency magnetic field having a high frequency.

主权项

1. A method for adding a radio frequency (RF) powder including a plurality of RF powder particles, each RF powder particle having a magnetic field coupling antenna circuit element including an inductive element and a capacitive element and that responds to a high frequency electromagnetic field having a specific frequency, the method comprising:
disposing the RF powder on a surface of a base sheet to add the RF powder to the base sheet; and disposing a plurality of dummy RF powder particles on the surface of the base sheet, wherein the plurality of dummy RF powder particles is configured to not respond to any electromagnetic fields, and wherein an appearance of the plurality of dummy RF powder particles mimics an appearance of the plurality of RF powder particles.