Backplate of field emission device with self aligned focus structure and spacer wall locators
AssigneeCandescent Technologies Corporation
InventorDuane A. Haven
Life of this patent
Estimating the term…
Abstract
A backplate structure for a field emission display includes a transparent backplate substrate, a plurality of opaque electrodes, a plurality of field emitters geometrically located in the opaque electrodes, and a focusing electrode. The focusing electrode has an exterior surface with a conductive layer disposed substantially over the exterior surface, and the focusing electrode is electrically isolated from the opaque electrodes. The faceplate structure can further include a plurality of transparent electrodes that are orthogonal to the opaque electrodes.
Claims12
A method for forming a backplate structure for a field emission device, comprising:
- providing a backplate with an exterior surface and an internal surface, the backplate including a transparent substrate, a plurality of opaque electrodes, and a plurality of field emitters formed on the opaque electrodes;
- applying a photo patternable material to substantially cover the entire internal surface;
- exposing the internal surface to UV radiation through the exterior surface;
- developing and curing the photo patternable material to form a cured photo patternable material;
- coating the cured photo patternable material with a conductive layer;
- and
- creating a focusing electrode that is electrically isolated from the opaque electrodes.
A method for forming a backplate structure for a field emission device, comprising:
- providing a backplate with an exterior surface and an internal surface, the backplate including a transparent substrate, a plurality of opaque electrodes, a plurality of transparent electrodes that are orthogonal to the opaque electrodes, and a plurality of field emitters formed on the opaque electrodes;
- applying a photo patternable material to substantially the entire internal surface;
- exposing the internal surface to UV radiation through the exterior surface;
- developing and curing the photo patternable material to form a cured photo patternable material;
- coating the cured photo patternable material with a conductive layer;
- and
- creating a focusing electrode electrically isolated from the opaque electrodes and aligned to the plurality of opaque electrodes.
A method for forming a backplate structure for a field emission device, comprising:
- providing a backplate with an exterior surface and an internal surface, the backplate including a transparent substrate, a plurality of opaque electrodes, and an active area defined by a plurality of field emitters formed on the opaque electrodes;
- applying a photo patternable material to at least the active area;
- exposing through a mask onto an internal side of the backplate substrate;
- exposing the internal surface to UV radiation through the exterior surface;
- developing and curing the photo patternable material to form a cured photo patternable material;
- coating the cured photo patternable material with a conductive layer;
- and
- creating a focusing grid that is electrically isolated from the electrodes.
A method for forming a backplate structure for a field emission device, comprising:
- providing a backplate with an exterior surface and an internal surface, the backplate including a transparent substrate, a plurality of opaque electrodes, and an active area defined by a plurality of field emitters formed on the opaque electrodes;
- applying a photo patternable material to substantially the entire internal surface;
- creating a deformable wall locator by differential exposure of a row focus pattern and a column focus pattern of the internal surface to UV radiation through the exterior surface;
- developing and curing the photo patternable material to form a cured photo patternable material with a row focus pattern of height h.sub.1 and a column focus pattern of height h.sub.2 ;
- coating the cured photo patternable material with a conductive layer;
- and
- creating a focusing electrode that is electrically isolated from the opaque electrodes.
Dependencies are inferred from the claim text.