Abstract:
Disclosed are an electron emitting device using graphene and a method for manufacturing the same. The electron emitting device includes a metal holder having at least one slot, at least one emitter plate inserted into the slot to protrude from a first surface of the metal holder, and including an emitter supporting member and a graphene emitter attached onto the emitter supporting member, an insulation layer provided on the first surface of the metal holder, and a gate electrode provided on the insulation layer and including a gate supporting member and a graphene gate attached onto the gate supporting member.
Abstract:
Described herein is a method of preparing nano-carbon; a method of preparing an electron emitting source by supporting the soot; and an apparatus for preparing the same. A torch electrode 10 of an arc torch 1 as a first electrode is placed opposite to a material to be arced 2 using graphite as a second electrode. A voltage is applied between the torch electrode 10 and an edge portion of the material to be arced 2 to generate are discharge, to evaporate the edge portion of the material to be arced 2 exposed to the arc discharge, to generate soot. The soot thus generated is deposited on the surface of a substrate opposite to an arc discharge-generating area through a mask having a patterned opening.
Abstract:
The present invention is directed to processes for printing compositions containing etchants or modifiers onto surfaces by spinning a filament from a viscoelastic polymer solution containing an etchant or modifier. The present invention also relates to viscoelastic compositions used in the printing processes, and devices made therefrom.
Abstract:
A method for manufacturing probe tips suitable for use in an atomic force microscope (AFM) or scanning tunneling microscope (STM) begins by depositing a layer of a first material over a substrate and then patterning the layer of the first material to define apertures wherever probe tips are to be formed. Next, a layer of a second material is deposited using an unbiased high density plasma chemical vapor deposition (HDPCVD) process to form sharp probe tips in the apertures in the layer of the first material. The HDPCVD process also forms a sacrificial layer of the second material on top of the portions of the first material not removed by the patterning step. The sacrificial layer at least partially overhangs the apertures in the first material, forming a shadow mask during the deposition process which gives rise to a sharp probe profile. After the formation of the probe tips, the remaining portion of the layer of first material is removed using a wet chemical etchant that selectively etches the first material at a much higher rate than the second material. The removing step also removes the sacrificial layer of the second material because the sacrificial layer is lifted off the substrate when the underlying layer of first material is etched away. In one preferred embodiment, the first material is silicon nitride and the second material is silicon dioxide.
Abstract:
Disclosed are an electron emitting device using graphene and a method for manufacturing the same. The electron emitting device includes a metal holder having at least one slot, at least one emitter plate inserted into the slot to protrude from a first surface of the metal holder, and including an emitter supporting member and a graphene emitter attached onto the emitter supporting member, an insulation layer provided on the first surface of the metal holder, and a gate electrode provided on the insulation layer and including a gate supporting member and a graphene gate attached onto the gate supporting member.
Abstract:
The present invention is directed to processes for printing compositions containing etchants or modifiers onto surfaces by spinning a filament from a viscoelastic polymer solution containing an etchant or modifier. The present invention also relates to viscoelastic compositions used in the printing processes, and devices made therefrom.
Abstract:
There are provided a method of preparing nano-carbon comprising evaporating a material to be arced containing carbon as a main component by means of arc discharge which does not necessarily require a process container and so on, but uses an apparatus having a welding arc torch or an analogous structure to generate soot, a method of preparing an electron emitting source by supporting the soot, and an apparatus for preparing the same. A torch electrode 10 of an arc torch 1 as a first electrode is placed opposite to a material to be arced 2 using graphite as a second electrode. A voltage is applied between the torch electrode 10 and an edge portion of the material to be arced 2 to generate arc discharge, to evaporate the edge portion of the material to be arced 2 exposed to the arc discharge, to generate soot. The soot thus generated is deposited on the surface of a substrate opposite to an arc discharge-generating area through a mask having a patterned opening.