US Patent 7550907 - Carbon nanotube yarn electron emitter

http://www.freepatentsonline.com/7550907.html

This patent from Hon Hai Precision teaches wrapping carbon nanotube yarn around an elongated structure to form an electron emitting device with enhanced efficiency. Claim 1 reads:

1. A field emission element, comprising:

an elongated solid body;

a carbon nanotube yarn wrapping round the elongated solid body;

an electrically conductive adhesive agent applied between the elongated solid body and the carbon nanotube yarn, the electrically conductive adhesive agent being configured for fixing the carbon nanotube yarn to the elongated solid body, wherein substantially all of the carbon nanotube yarn is entirely adhered on a peripheral surface of the elongated solid body by the adhesive agent.