Micron Technology Incorporated

Other

USA As Represented by Secretary of the Navy

Jianping P Yang

Henry F Gray

Banhalli R Ratna

David H Wells

Syed B Qadri

Eric J Knappenberger

David S Hsu

Banahalli R Ratna

David S Y Hsu

In one aspect, the invention encompasses a method of fabricating a display screen. Phosphor molecules are electrophoretically deposited onto a substrate in a first solution having a first hydroxide ion concentration. The deposited phosphor molecules are then rinsed with a second solution having an hydroxide ion concentration greater than the first hydroxide ion concentration. In another aspect, the invention encompasses a method of depositing phosphor molecules over selected regions of a substrate. Conductive regions are formed over portions of a substrate while non-conductive regions are left over other portions of the substrate. Phosphor molecules are electrophoretically deposited onto the conductive regions of the substrate in a first solution having a first hydroxide ion concentration. The substrate is then rinsed with a second solution having a second hydroxide ion concentration greater than the first hydroxide ion concentration. After the rinsing, the deposited phosphor molecules are dried.

Methods of depositing phosphor molecules and forming field emission display devices

In one aspect, phosphor molecules are electrophoretically deposited onto a substrate in a first solution having a first hydroxide ion concentration. The deposited phosphor molecules are then rinsed with a second solution having an hydroxide ion concentration greater than the first hydroxide ion concentration. In another aspect, conductive regions are formed over portions of a substrate while non-conductive regions are left over other portions of the substrate. Phosphor molecules are electrophoretically deposited onto the conductive regions of the substrate in a first solution having a first hydroxide ion concentration. The substrate is then rinsed with a second solution having a second hydroxide ion concentration. The second hydroxide ion concentration is greater than the first hydroxide ion concentration. After the rinsing, the deposited phosphor molecules are dried. In yet another aspect, the invention encompasses a method of forming an FED device.

Methods of electrophoretic deposition of phosphor molecules

In one aspect, the invention includes a method of patterning a substrate. A film is formed over a substrate and comprises a plurality of individual molecules. The individual molecules comprise two ends with one of the two ends being directed toward the substrate and the other of the two ends being directed away from the substrate. Particle-adhering groups are bound to said other of the two ends of at least some of the individual molecules and a plurality of particles are adhered to the particle-adhering groups to form a mask over the substrate. The substrate is etched while the mask protects portions of the substrate. In another aspect, the invention encompasses a method of forming a field emission display. A material having a surface of exposed nitrogen-containing groups is formed over the substrate. At least one portion of the material is exposed to radiation while at least one other portion of the material is not exposed. The exposing renders one of the exposed or unexposed portions better at bonding the masking particles than the other of the exposed and unexposed portions. After the exposing, the material is bonded with masking particles. The adhered masking particles define a mask over the semiconductive substrate. The substrate is etched while the patterned mask protects portions of the substrate. A plurality of emitters are formed from the substrate. A display screen is provided to be spaced from the emitters.

Methods of forming patterned constructions, methods of patterning semiconductive substrates, and methods of forming field emission displays

Nanocrystalline phosphors are formed within a bicontinuous cubic phase.

Nanoparticle phosphors manufactured using the bicontinuous cubic phase process

In one aspect, the invention encompasses a method of fabricating a display screen. Phosphor molecules are electrophoretically deposited onto a substrate in a first solution having a first hydroxide ion concentration. The deposited phosphor molecules are then rinsed with second solution having an hydroxide ion concentration greater than the first hydroxide ion concentration. In another aspect, the invention encompasses a method of depositing phosphor molecules over selected regions of a substrate. Conductive regions are formed over portions of a substrate while non-conductive regions are left over other portions of the substrate. Phosphor molecules are electrophoretically deposited onto the conductive regions of the substrate in a first solution having a first hydroxide ion concentration. The substrate is then rinsed with a second solution having a second hydroxide ion concentration. The second hydroxide ion concentration is greater than the first hydroxide ion concentration. After the rinsing, the deposited phosphor molecules are dried. In yet another aspect, the invention encompasses a method of forming an FED device.

Methods of fabricating display screens using electrophoretic deposition

Luminescent phosphor compositions comprising thulium doped lanthanum aluminates are disclosed. In one aspect of the invention, a luminescent phosphor composition comprises:

Luminescent phosphor composition and display

Nanocrystalline semiconductors are synthesized within a bicontinuous cubic atrix 10. The nanocrystalline particles 12 may then be end-capped 18 with a dispersant to prevent agglomeration. One typical nanocrystalline semiconductor compound made according to the present invention is PbS. Other IV-VI semiconductors may be produced by the method of the present invention. The method of this invention may also be used to produce doped semiconductors.

Formation of nanocrystalline semiconductor particles within a

Nanocrystalline phosphors are formed within a bicontinuous cubic phase. The phosphors are doped with an optimum concentration, of manganese, for example, corresponding to about one or less dopant ions per phosphor particle.

Nanoparticle phosphors manufactured using the bicontinuous cubic phase

Phosphors having a doped core are surrounded by a shell material. Additionally, these nanocrystalline phosphors, or larger phosphors formed by conventional or other processes may be surrounded by a shell that prevents or significantly reduces non-radiative recombination at the surface of the original phosphor.

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Boise, ID, United States of America

Jianping P Yang