Thursday, October 12, 2006

US Patent 7118693 - Nanotube EMI Shielding (>10dB)

Due to the various environments in which electronic circuits are required to operate there is a great interest in materials capable of providing protection from electric shock and interference. Several patents have already been issued toward the use of fullerenes and nanotubes toward this purpose. This patent provides enhanced EMI dissipation (>10dB) using a single or double walled nanotube composite film. Claim 1 reads:

1. A conformal coating that provides EMI shielding, wherein said coating comprises: an insulating layer; and a conductive layer wherein said conductive layer comprises an electrically conductive material and said electrically conductive material comprises carbon nanotubes having an outer diameter of 3.5 nm or less, wherein the EMI shielding is at least 10 dB.