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

摘要

Selective deposition of magnetic material such as particles, and producing a pre-laminated stack (220) of shielding layers for offsetting attenuation of RF caused by a metal face plate (210) of a smart card (or tag) or a metallized layer near a passive transponder (230). Coated or uncoated magnetic particles of different sizes (FIG. 2C) may be used to increase the packing density of the material after its deposition on a substrate. Magnetography-based techniques may be used to apply the particles, at high packing density, including different-sized particles to a substrate such as PVC. Magnetic particles may be used as a carrier medium (260) to deposit other particles nanoparticles. A system (FIG. 6) for selective deposition is disclosed.