Field emission wafer and process for making same for use in field emission display devices
OwnerJay J.L. Yi, William J.S. Zhong +2inventors
InventorsJay J.L. Yi, William J.S. Zhong, Jack C. Chou, Po-Ping Lin
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Abstract
A field emission wafer comprising an array of fused glass fibers, a plurality of fibers having an inner core glass of a bulk conductive glass and a clad glass that surrounds the core glass, the conductivity of the core glass being substantially higher than the clad glass, the core glass of the fibers having an upper portion with an emission tip formed thereon.
Claims43
A field emission wafer formed from an array of glass fibers, a plurality of fibers in the array each comprising an inner core glass of a bulk conductive glass and a clad glass that surrounds the core glass, the conductivity of the core glass being substantially higher than the clad glass, the core glass of the fibers having an upper portion with an emission tip formed thereon.
A field emission display comprising a faceplate and an opposing base plate, the is base plate comprising a field emission wafer formed of an array of glass fibers, a plurality of fibers in the array each comprising an inner core glass of a bulk conductive glass and a clad glass that surrounds the core glass, the conductivity of the core glass being substantially higher than the clad glass, the core glass of the fibers having an upper portion with an emission tip formed thereon.
A field emission display comprising a faceplate and an opposing base plate, the base plate comprising a n array o f glass fibers, a plurality of fibers in the array each comprising an inner core glass of bulk conductive glass with electrical resistivity in the range of 107 to 1013 ohm-cm, and clad glass that surround the core glass, the ratio of conductivity between the core glass to the clad glass being greater than about 1000:1.
A field emission wafer comprising an array of glass fibers for use in field emission display, a plurality of fibers in the array each comprising a core glass and a clad glass that surrounds the core glass, the core glass in the fibers having an upper portion with an emission tip formed thereon, the emission tip being recessed relative to a surrounding clad glass, the core glass being a bulk conductive glass.
A field emission display comprising a faceplate and an opposing baseplate, the base plate comprising a field emission wafer formed of an array of glass fibers for use in field emission display, a plurality of fibers in the array each comprising a core glass and a clad glass that surrounds the core glass, the core glass in a fiber having an upper portion with an emission tip formed thereon, the emission tip being recessed relative to a surrounding clad glass, the core glass being a bulk conductive glass.
A field emission wafer formed of an array of glass fibers, a plurality of fibers in the array each comprising an inner core glass of a bulk conductive glass;
- an inner clad glass, and an outer clad glass that surrounds the core glass, the core glass of a fiber having an emission tip formed thereon and being recessed relative to the surrounding outer clad glass and extending relative to the inner clad glass.
The field emission wafer of claim 24 wherein the inner clad glass is an alumina-borosilicate glass that is etchable at least about 500 times faster than the core and outer clad glass.
A field emission display comprising a face plate and an opposing base plate, the base plate comprising a wafer formed of an array of glass fibers, a plurality of fibers in the array each comprising a core glass, an inner clad glass, and an outer non-conductive clad glass, the inner core glass in a fiber having an upper portion having an emission tip formed thereon that is recessed relative to surrounding outer clad glass clad glass and extending relative to surrounding inner clad glass, the core glass being a bulk conductive glass.
A base plate for a field emission display, the base plate comprising an array of emission tips, the emission tips comprising a bulk conductive glass.
A base plate for a field emission device wherein the base plate has a surface comprising an array of glass fiber ends, a plurality of the fibers comprising a bulk conducting core glass and a surrounding clad glass, the fibers each having an upper portion terminating in an emission tip formed of the bulk conductive glass.
A field emission display comprising a face plate and a base plate wherein the base plate has a surface comprising an array of fused fibers, a plurality of the fibers each comprising a bulk conductive core glass and a surrounding clad glass, the fused fibers each having an upper portion terminating in an emission tip formed of the bulk conducting core and wherein the upper portion of the fibers includes a spacer formed of the clad glass surrounding and extending above an emission tip.
A method of making a field emission wafer comprising:
- providing an array of fused glass fibers in the form of a wafer, a plurality of the fibers in the array each comprising an inner core glass of a bulk conductive glass;
- a surrounding clad glass;
- applying an etchant to a surface of the wafer, the etchant being selected to preferentially etch the core glass relative to surrounding clad glass so as to produce an emission tip of core glass that is recessed relative to a surrounding clad glass;
- allowing the etchant to act until emission tips are formed on a surface of the wafer.
A method of making a field emission display comprising:
- providing an array of glass fibers in the form of a wafer, a plurality of fibers in the array each comprising a core glass, an inner clad glass, and an outer clad glass, the core glass being a bulk conductive glass with resistivity in the range of 107 to 1013 ohm-cm, the ratio of conductivity between the core glass to the clad glass being greater than 1000:
- 1, applying an etchant to a surface of the wafer, the etchant being selected to preferentially etch the inner clad glass relative to the outer clad glass and the core glass, and allowing the etchant to etch the surface so as to produce an emission tip of core glass that is recessed relative to the outer clad glass and extending relative to the inner clad glass.
A glass fiber comprising an inner core glass of a bulk conductive glass and a clad glass that surrounds the core glass, the conductivity of the core glass being substantially higher than the clad glass, the core glass of the fibers having an upper portion with an emission tip formed thereon.
Dependencies are inferred from the claim text.