Pulsed hybrid field emitter

Patent · 03 March 1998

OSTI ID:597168

Sampayan, S E

A hybrid emitter exploits the electric field created by a rapidly depoled ferroelectric material. Combining the emission properties of a planar thin film diamond emitter with a ferroelectric alleviates the present technological problems associated with both types of emitters and provides a robust, extremely long life, high current density cathode of the type required by emerging microwave power generation, accelerator technology and display applications. This new hybrid emitter is easy to fabricate and not susceptible to the same failures which plague microstructure field emitter technology. Local electrode geometries and electric field are determined independently from those for optimum transport and brightness preservation. Due to the large amount of surface charge created on the ferroelectric, the emitted electrons have significant energy, thus eliminating the requirement for specialized phosphors in emissive flat-panel displays. 11 figs.

• Research Organization: University of California
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: Univ. of California, Oakland, CA (United States)
• Patent Number(s): US 5,723,954/A/
• Application Number: PAN: 8-422,094
• OSTI ID: 597168
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CATHODES
DESIGN
DISPLAY DEVICES
ELECTRON SOURCES
FIELD EMISSION
MICROWAVE EQUIPMENT
SERVICE LIFE
USES