US Patent 7763362 - Metallic nanoparticle shielding

http://www.freepatentsonline.com/7763362.html

This patent is from a company called PChem Associates and teaches a printed circuit shielding film for EMI interference based on metal nanoparticles. The film can be applied to a wider variety of substrates than conventional electronic shielding films due to less harsh processing methods and might be suitable for plastic or flexible electronic substrates. Claim 1 reads:

1. A cohesive metallic shielding structure, comprising:

a population of metallic nanoparticles, deposited on a substrate and sintered to form a cohesive metallic shielding structure,

wherein the cohesive metallic shielding structure has a characteristic thickness of less than about 20 micrometers; and

wherein the cohesive metallic shielding structure has a sheet resistance less than about 50 mohms/square/mil.