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US 6,144,144 AGranted
Patterned resistor suitable for electron-emitting device
AssigneeCandescent Technologies Corporation
InventorsJames M. Cleeves, Christopher J. Spindt, Roger W. Barton, Kishore K. Chakravorty, Arthur J. Learn, Stephanie J. Oberg
Life of this patent
Estimating the term…
Abstract
An electron-emitting device contains a vertical emitter resistor patterned into multiple laterally separated sections (34, 34V, 46, or 46V) situated between the electron-emissive elements (40), on one hand, and emitter electrodes (32), on the other hand. Sections of the resistor are spaced apart along each emitter electrode.
Claims52
A device comprising:
- an emitter electrode;
- a patterned electrically resistive layer overlying part of the emitter electrode;
- a dielectric layer overlying the resistive layer;
- a control electrode overlying the dielectric layer above the resistive layer and having outer lateral edges in approximate vertical alignment with lateral edges of the resistive layer;
- and
- an electron-emissive element (a) positioned over the resistive layer above the emitter electrode and (b) situated in a composite opening extending through the control electrode and the dielectric layer.
3 more elements
A device comprising:
- a group of laterally separated emitter electrodes;
- a patterned electrically resistive layer overlying parts of the emitter electrodes;
- a dielectric layer overlying the resistive layer;
- a plurality of laterally separated control electrodes overlying the dielectric layer above the resistive layer and having outer lateral edges in approximate vertical alignment with lateral edges of the resistive layer;
- and
- a multiplicity of electron-emissive elements (a) positioned over the resistive layer above the emitter electrodes and (b) situated in composite openings extending through the control electrodes and the dielectric layer.
3 more elements
A device comprising:
- an emitter electrode having opposing first and second outer lateral edges;
- a plurality of laterally separated electrically resistive sections overlying parts of the emitter electrode, each resistive section extending laterally substantially continuously from at least a location largely above the emitter electrode's first outer lateral edge to at least a location largely above the emitter electrode's second outer lateral edge;
- a dielectric layer overlying the resistive sections;
- a plurality of laterally separated control electrodes extending over the dielectric layer above the resistive sections;
- and
- a multiplicity of electron-emissive elements (a) positioned over the resistive sections above the emitter electrodes, (b) situated in composite openings extending through the control electrodes and the dielectric layer, and (c) allocated into a plurality of laterally separated sets, each comprising multiple electron-emissive elements that overlie a different corresponding one of the resistive sections.
3 more elements
A device comprising:
- a group of laterally separated emitter electrodes;
- a plurality of laterally separated electrically resistive strips, each extending over at least two of the emitter electrodes;
- a dielectric layer overlying the resistive strips;
- a plurality of laterally separated control electrodes extending over the dielectric layer above the resistive strips;
- and
- a multiplicity of electron-emissive elements (a) positioned over the resistive strips above the emitter electrodes and (b) situated in composite openings extending through the control electrodes and the dielectric layer.
3 more elements
A device comprising:
- a group of laterally separated emitter electrodes, each having opposing first and second outer lateral edges;
- a plural number of laterally separated electrically resistive portions, each overlying part of one of the emitter electrodes and extending laterally substantially continuously from at least at a location largely above that emitter electrode's first outer lateral edge to at least a location largely above that emitter electrode's second outer lateral edge;
- a dielectric layer overlying the resistive portions;
- a plurality of laterally separated control electrodes overlying the dielectric layer;
- and
- a multiplicity of electron-emissive elements (a) positioned over the resistive portions, (b) situated in composite openings extending through the control electrodes and the dielectric layer, and (c) allocated into a plural number of laterally separated sets, each comprising multiple electron-emissive elements that overlie a different corresponding one of the resistive portions.
3 more elements
A device comprising:
- a group of laterally separated emitter electrodes;
- an electrically resistive layer overlying the emitter electrodes;
- a dielectric layer overlying the resistive layer;
- a plurality of laterally separated control electrodes overlying the dielectric layer above the resistive layer;
- and
- a multiplicity of electron-emissive elements (a1) positioned over the resistive layer above the emitter electrodes and (a2) situated in composite openings extending through the control electrodes and the dielectric layer, the device being divided into (b1) an active device region which contains the electron-emissive elements and (b2) a peripheral device region in which contact openings extend through the resistive layer down substantially to the emitter electrodes.
3 more elements
Dependencies are inferred from the claim text.