Selective deposition of magnetic particles and using magnetic material as a carrier medium to deposit nanoparticles

An RFID device comprising:

• a booster antenna (BA) disposed in an inlay substrate;
• and
• a metal foil disposed on at least one side of the inlay substrate, having a thickness less than the skin depth of the metal or material being used in order to prevent the formation of eddy currents in the metal foil that will attenuate the RF electromagnetic field.

A system (600) for selectively depositing particles on a substrate, comprising:

• a magnetic transfer roller rotating in a first direction and carrying magnetic particles;
• a magnetized imaging drum rotating in a second direction, opposite to the first direction;
• a deflector blade for causing magnetic particles to be released from the surface of the transfer roller into a cloud of magnetic particles which are closely adjacent the magnetized surface of the imaging drum and moving generally in the same direction as the surface of the imaging drum, for being attracted to and attaching themselves to the recorded zones on the imaging drum, so that there will be a pattern of magnetic particles on the surface of the imaging drum.