Wednesday, February 11, 2009

US Patent 7489069 - Molybdenum nanotip backlight

This patent from Hon Hai Precision teaches a display backlight using nanotips formed of Molybdenum as an emission source which is noted to have a better life span and emission efficiency than carbon nanotube emitters. Claim 1 reads:

1. A light source comprising:

a substrate having a surface;

a cathode formed on the surface of the substrate;

an isolating layer formed on the cathode;

at least one substantially solid-cross-section electron emitter formed on the isolating layer, each electron emitter comprising an isolating post extending from the isolating layer and a nano-tip formed on a top end of the respective isolating post, at least 75 volume percent of each nano-tip being occupied by a material comprised of molybdenum, the isolating post being made of a material comprised of diamond-like carbon;

a light-permeable anode facing the electron emitters and being spaced from the cathode to form a vacuum chamber; and

at least one fluorescent layer formed on the anode.